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Dental Prostheses (dental + prosthesis)

Distribution by Scientific Domains

Medical Sciences	96%

Distribution within Medical Sciences

Oral Sciences & Technology	18%
Dermatology	6%

Kinds of Dental Prostheses

fixed dental prosthesis

Selected Abstracts

Laser-Welded Hollow Pontic Full-Gold Fixed Dental Prosthesis

JOURNAL OF PROSTHODONTICS, Issue 5 2010
Alan J. Sutton DDS
Abstract This article describes a technique for the fabrication of a laser-welded hollow pontic full-gold fixed dental prosthesis. Reference to any specific commercial products, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or favoring by the U.S. Government. The opinions of the authors expressed herein do not necessarily state or reflect those of the U.S. Government, and shall not be used for advertising or product endorsement purposes. [source]

Survival probability of zirconia-based fixed dental prostheses up to 5 yr: a systematic review of the literature

EUROPEAN JOURNAL OF ORAL SCIENCES, Issue 5 2010
Jaana-Sophia Schley
Schley J-S, Heussen N, Reich S, Fischer J, Haselhuhn K, Wolfart S. Survival probability of zirconia-based fixed dental prostheses up to 5 yr: a systematic review of the literature. Eur J Oral Sci 2010; 118: 443,450. © 2010 Eur J Oral Sci The purpose of this systematic review was to calculate the 5-yr survival rates of all-ceramic zirconia-based fixed dental prostheses (FDPs) and to analyze technical and biological complications. An electronic literature search of MEDLINE (PubMed) was conducted independently by three reviewers to identify clinical studies from 1999 to 2009 and was completed by a manual search. Keywords and inclusion and exclusion criteria were well-defined. The search revealed 399 titles and led to the final analysis of 18 full-text articles. Nine studies met the inclusion criteria. Extracted data were statistically calculated into 5-yr survival rates and 5-yr complication-free rates by using Poisson regression analysis. In total, 310, 3- to 4-unit FDPs and 20 FDPs with more than 4 units were included. The estimated 5-yr survival rate for all FDPs was 94.29% (95% CI: 58.98,99.32); 19 FDPs were lost as a result of catastrophic failures. The 5-yr complication-free rate regarding technical complications was 76.41% (95% CI: 42.42,91.60) with chipping being the most frequent complication. Regarding biological complications, the 5-yr complication-free rate was 91.72% (95% CI: 59.19,98.53). The survival rates of zirconia-based short-unit FDPs are promising. However, an important improvement of the veneering systems is required, and for FDPs with more units in function, further randomized, controlled clinical trials are necessary. [source]

Clinical fit of four-unit zirconia posterior fixed dental prostheses

EUROPEAN JOURNAL OF ORAL SCIENCES, Issue 6 2008
Sven Reich
The objective of this clinical study was to assess the internal and marginal accuracy of computer-aided design/computer-aided manufacturing (CAD/CAM)-generated four-unit all-ceramic posterior fixed dental prostheses (FDPs). The data were compared with the results of three-unit metal-ceramic and all-ceramic FDPs that were obtained in a previous study. Twenty-four patients were provided with all-ceramic posterior four-unit FDPs made from semisintered blank zirconia material. Prior to definitive insertion the accuracy was evaluated using a replica technique with a light body silicone that was stabilized with a heavy body material. The replica samples were examined using microscopy. The median marginal gap of the 24 four-unit FDPs was 77 ,m. The median gap widths were 87 ,m at the midaxial wall, 167 ,m at the axio-occlusal transition of the abutments, and 170 ,m at centro-occlusal location. Although the marginal accuracy of the four-unit FDPs differed significantly from that of the three-unit metal-ceramic FDPs (median 54 ,m), the values obtained were clinically satisfactory and showed that semisintered zirconia blanks could be used for the fabrication of four-unit FDPs. [source]

Load-bearing capacity of all-ceramic three-unit fixed partial dentures with different computer-aided design (CAD)/computer-aided manufacturing (CAM) fabricated framework materials

EUROPEAN JOURNAL OF ORAL SCIENCES, Issue 4 2008
Florian Beuer
The purpose of this in vitro study was to compare the load-bearing capacity of posterior three-unit fixed dental prostheses (FDP) produced with three different all-ceramic framework materials: glass-infiltrated alumina (ICA), glass-infiltrated alumina strengthened with zirconia (ICZ), and yttria-stabilized polycrystalline zirconia (YZ). Additionally, the influence on aging of mechanical cyclic fatigue loading and thermal cycling in water were evaluated. A total of 20 frameworks each were fabricated from ICA, ICZ, and YZ by a computer-aided design (CAD)/computer-aided manufacturing (CAM) system. The framework designs were identical for all specimens. All frameworks were veneered with porcelain and cemented with glass,ionomer. Prior to fracture testing, 10 FDP of each experimental group were subjected to thermal and mechanical cycling. Additionally, fractographic analysis was performed. Statistical analysis showed that FDP made from YZ had significantly higher load to failure, whereas no difference was found between the other two materials. Aging did not have a significant effect on the fracture load. [source]

Oral health and oral implant status in edentulous patients with implant-supported dental prostheses who are receiving long-term nursing care

GERODONTOLOGY, Issue 4 2009
Rita Isaksson
Aim:, The aim of this study was to investigate oral health and oral implant status in a group of edentulous patients receiving long-term residential or nursing care (LTC), all of whom had implant-supported fixed or removable dental prostheses. Material and methods:, A dental examination was performed on a total of 3310 patients receiving LTC and from this population 35 edentulous patients in whom dental implants had been placed formed the cohort for this study. All examinations were performed by a specialist in hospital dentistry and took place in the patients' own home environment. Oral health was assessed by means of a protocol which evaluated oral hygiene status, possible oral mucosal inflammation and oral mucosal friction levels. Any problems with the implant-supported prosthesis, implant mobility or other complications were also assessed. In addition, patients were asked about any oral symptoms and their usual oral hygiene procedures. Results:, About half of the subjects (17/35) were registered as having no/mild inflammation with 18 of 35 having moderate/severe inflammation. Twelve of the 35 patients had good/acceptable oral hygiene and 23 of 35 had poor/bad oral hygiene. Twenty-one of the 35 patients depended on help from the nursing personnel for their daily oral hygiene procedures. Obvious problems with food impaction were noted in 11 patients. A total of 229 implants had been placed in 43 jaws supporting 40 full arch-fixed prostheses and three implant-borne overdentures. There was no evidence of mobility or fractures of either the implants or the prostheses. Fifteen implants showed some exposed screw threads. Pus was exuding from one implant site and general peri-implant gingival hyperplasia was noted in two patients. Twenty-four patients were completely satisfied with the function and appearance of their implant-supported prostheses. Two patients were totally dissatisfied. Conclusion:, This study indicates that oral implant therapy can be considered as a treatment of choice in elderly patients, even if oral hygiene is sub-optimal. [source]

Implant overdentures for edentulous elders: study of patient preference

GERODONTOLOGY, Issue 1 2009
Shahrokh Esfandiari
Background:, Studies show that elders wearing implant overdentures have improved nutrition and quality of life. However, upfront costs of this therapy are high, and the income of elderly edentulous populations is low. Objectives:, This study was designed (i) to measure the preferences of edentulous patients for mandibular two-implant overdentures using Willingness-To-Pay (WTP) and Willingness-To-Accept (WTA), (ii) to assess the effect of long-term financing on WTP and (iii) to assess the desired role of health care plans in financing dental prostheses. Methods:, Edentulous elders (68,79 years; n = 36) wearing maxillary dentures and either a mandibular conventional denture (CD, n = 13) or a two-implant overdenture with ball attachments (IOD, n = 23) participated in this study. All had received their prostheses 2 years previously, as part of a randomised clinical trial. A three-part questionnaire was completed during a 20-min interview with a trained researcher. Results:, Forty-six per cent (6/13) of the CD wearers and 70% (16/23) of the IOD wearers were willing to pay three times more than the current cost of conventional dentures for implant prostheses. These percentages were increased to 77% (CD) and 96% (IOD) if participants could pay for implant overdentures in monthly instalments. Eighty-six per cent (31/36) of all participants in both groups (21/23 IOD; 10/13 CD) thought that the government should cover at least some of the cost of implant overdentures. Conclusions:, This study shows that, the majority of elderly edentate individuals who have not experienced mandibular two-implant overdenture therapy are willing to pay the cost, particularly when payment can be made in monthly instalments. [source]

The Teaching of Denture Marking Methods in Dental Schools in the United Kingdom and the United States,

JOURNAL OF FORENSIC SCIENCES, Issue 6 2009
M.Phil, Raymond Richmond B.Sc.
Abstract:, Forensic organizations worldwide have recommended that dental prostheses should be marked with, at a minimum, the patient's name and preferably with further unique identifiers such as a social security number. The current study aimed to assess the denture marking practice of dental schools within the United States and the United Kingdom. A questionnaire-based survey was employed to gain both quantitative and qualitative data on the methods, practices, and ethos behind denture marking in 14 U.K. and 32 U.S. dental schools. One hundred percent of U.K. and 87.5% of U.S. schools returned surveys and the results suggest that, for dental schools where there is no legal or legislative need for denture marking, the practice is inconsistently taught and appears to be reliant on internal forces within the school to increase awareness. Among those schools practicing marking, only 18% employ a technique likely to withstand common postmortem assaults; this is a concern. [source]

An infection control protocol: effectiveness of immersion solutions to reduce the microbial growth on dental prostheses

JOURNAL OF ORAL REHABILITATION, Issue 5 2003
A. C. Pavarina
summary, This investigation evaluated the effectiveness of an infection control protocol for cleansing and disinfecting removable dental prostheses. Sixty-four dentures were rubbed with sterile cotton swab immediately after they had been taken from patients' mouths. Samples were individually placed in the culture medium and immediately incubated at 37 ± 2 °C. The dentures were scrubbed for 1 min with 4% chlorhexidine, rinsed for 1 min in sterile water and placed for 10 min in one of the following immersion solutions: 4% chlorhexidine gluconate, 1% sodium hypochlorite, Biocide (iodophors) and Amosan (alkaline peroxide). After the disinfection procedures, the dentures were immersed in sterile water for 3 min, reswabbed and the samples were incubated. All samples obtained in the initial culture were contaminated with micro-organisms. All the lower dentures immersed in Biocide showed positive growth, and the upper dentures were positive for growth in six of eight dentures. The 4% chlorhexidine gluconate, 1% sodium hypochlorite and Amosan solutions have been proved effective to reduce the growth of the micro-organisms in the 10 min immersion period. The protocol evaluated in this study seems to be a viable method to prevent cross-contamination between dental personnel and patients. [source]

Corrosion of Dental Magnet Attachments for Removable Prostheses on Teeth and Implants

JOURNAL OF PROSTHODONTICS, Issue 4 2009
Arne F. Boeckler DMD, Dr Med Dent
Abstract Purpose: For a long time, the use of magnets for the anchorage of dental prostheses failed due to lack of biocompatibility and the magnets' high susceptibility to corrosion in the mouth. These facts make encapsulation of the magnetic alloy with a corrosion-resistant, tight, and functionally firm sealing necessary. Due to different products and analysis methods, it is not feasible to compare the findings for contemporary products with the sparse and rather old test results in the literature. Therefore, the aim of this study was the standardized control and the comparison of the corrosion behavior of modern magnetic attachments for use on teeth and dental implants. Materials and Methods: Thirty-seven components of magnetic attachments on implants and natural teeth from different alloys (NdFeB, SmCo, Ti, CrMoMnTiFe, etc.) as delivered by the manufacturers or fabricated according to their instructions were examined for their corrosion behavior using the statical immersion analysis (ISO 10271:2001). Four specimens of every product with the same design were used. An uncased SmCo magnet served as control. Analyses after 1, 4, 7, and 28 days of the storage in corrosion solution were made. The eluate was examined quantitatively on the alloy components of the respective component with the help of optical emission spectrometry (,g/cm2). The results were compared to the requirements of ISO standard 22674:2006. In addition, existing corrosion products were also defined in the solution after 28 days. The results were analyzed descriptively and statistically to determine possible significant differences (t -test and Mann-Whitney-Wilcoxon rank-sums test; p < 0.05). Results: Dissolved metal ions could be found on all tested products. The release after 1 and 4 days was different for all specimens. In the group of implant abutments, the highest ion release after 7 days was found (all measurements ,g/cm2): Fe (13.94, Magfit-IP-IDN dome type), Pd (1.53, Medical-anchor), Cr (1.32, Magfit-IP-IDN dome type), Ti (1.09, Magfit-IP-IDN abutment), Co (0.81, Medical-anchor), and B (0.6, Magfit-IP-IDN dome type). After 28 days, the analyzed ion release increased irregularly: Fe (173.58, Magfit-IP-IDN dome type), Pd (44.17, Medical-anchor), Cr (2.02, Magfit-IP-IDN dome type), Ti (2.11, Magfit-IP-IDN abutment), Co (26.13, Medical-anchor), B (1.77, Magfit-IP-IDN dome type), and Nd (79.18, Magfit-IP-IDN dome type). In the group of magnetic systems on natural teeth, the highest ion release after 7 days was found for Fe (4.81, Magfit DX 800 keeper), Cr (1.18, Magfit DX 800 keeper), Pd (0.21, Direct System Keeper), Ni (0.18, WR-Magnet S3 small), Co (0.12, Direct System Keeper), and Ti (0.09, Magna Cap , Mini). After 28 days, the analyzed ion release increased non-uniformly: Fe (31.92, Magfit DX 800 Keeper), Cr (6.65, Magfit DX 800 Keeper), Pd (18.19, Direct System Keeper), Ni (0.61, WR-Magnet S3 small), Co (10.94, Direct System Keeper), Ti (0.83, Magna Cap , Mini), and Pd (2.78, EFM Alloy). In contrast, the uncased control magnet showed an exponential release after 7 days of Sm ions (55.06) and Co-ions (86.83), after 28 days of Sm ions (603.91) and Co ions (950.56). The release of corrosion products of all tested products stayed significantly under the limit of 200 ,g/cm2 (ISO 22674:2006). In contrast, the non-encapsulated control magnet exceeded that limit significantly. Conclusion: The analysis of the corrosion behavior of modern magnetic attachments for use on teeth and dental implants according to ISO 10271:2001 showed that metal ions had dissolved on all specimens. In the case of one product, the magnet corroded. For this product, an improvement of the capsulation would be desirable. None of the products reached the limit specified in ISO 22674:2006. All products seem to be suitable for dental application. Further studies in regard to the specific biocompatibility and possible cytotoxic effects on mucosa and tissue would be desirable. [source]

Burning mouth syndrome: the role of contact hypersensitivity

ORAL DISEASES, Issue 4 2009
R Marino
Background:, Burning mouth syndrome is a burning sensation or stinging disorder affecting the oral mucosa in the absence of any clinical signs or mucosal lesions. Some studies have suggested that burning mouth syndrome could be caused by the metals used in dental prostheses, as well as by acrylate monomers, additives and flavouring agents, although others have not found any aetiologic role for hypersensitivity to dental materials. Objective:, To evaluate the extent and severity of adverse reactions to dental materials in a group of patients with burning mouth syndrome, and investigate the possible role of contact allergy in its pathogenesis. Materials and methods:, We prospectively studied 124 consecutive patients with burning mouth syndrome (108 males; mean age 57 years, range 41,83), all of whom underwent allergen patch testing between 2004 and 2007. Results:, Sixteen patients (13%) showed positive patch test reactions and were classified as having burning mouth syndrome type 3 or secondary burning mouth syndrome (Lamey's and Scala's classifications). Conclusion:, Although we did not find any significant association between the patients and positive patch test reactions, it would be advisable to include hypersensitivity to dental components when evaluating patients experiencing intermittent oral burning without any clinical signs. [source]

A systematic review of the survival and complication rates of implant supported fixed dental prostheses with cantilever extensions after an observation period of at least 5 years

CLINICAL ORAL IMPLANTS RESEARCH, Issue 5 2009
Marco Aglietta
Abstract Objective: The aim of this systematic review was to assess the survival rates of short-span implant-supported cantilever fixed dental prostheses (ICFDPs) and the incidence of technical and biological complications after an observation period of at least 5 years. Material and methods: An electronic MEDLINE search supplemented by manual searching was conducted to identify prospective or retrospective cohort studies reporting data of at least 5 years on ICFDPs. Five- and 10-year estimates for failure and complication rates were calculated using standard or random-effect Poisson regression analysis. Results: The five studies eligible for the meta-analysis yielded an estimated 5- and 10-year ICFDP cumulative survival rate of 94.3% [95 percent confidence interval (95% CI): 84.1,98%] and 88.9% (95% CI: 70.8,96.1%), respectively. Five-year estimates for peri-implantitis were 5.4% (95% CI: 2,14.2%) and 9.4% (95% CI: 3.3,25.4%) at implant and prosthesis levels, respectively. Veneer fracture (5-year estimate: 10.3%; 95% CI: 3.9,26.6%) and screw loosening (5-year estimate: 8.2%; 95% CI: 3.9,17%) represented the most common complications, followed by loss of retention (5-year estimate: 5.7%; 95% CI: 1.9,16.5%) and abutment/screw fracture (5-year estimate: 2.1%; 95% CI: 0.9,5.1%). Implant fracture was rare (5-year estimate: 1.3%; 95% CI: 0.2,8.3%); no framework fracture was reported. Radiographic bone level changes did not yield statistically significant differences either at the prosthesis or at the implant levels when comparing ICFDPs with short-span implant-supported end-abutment fixed dental prostheses. Conclusions: ICFDPs represent a valid treatment modality; no detrimental effects can be expected on bone levels due to the presence of a cantilever extension per se. [source]

Successful outcome of splinted implants supporting a ,planned' maxillary overdenture: a retrospective evaluation and comparison with fixed full dental prostheses

CLINICAL ORAL IMPLANTS RESEARCH, Issue 4 2009
A. Sanna
Abstract Objective: Whereas an overdenture concept is generally accepted for the mandible, the outcome of this therapy for the maxilla remains less documented. This retrospective analysis evaluated the peri-implant parameters of implants supporting a ,planned' overdenture in the maxilla, and compared these data with those of an age-matched control group, with a fixed full dental prosthesis. Material and methods: All patients with an implant-supported overdenture in the maxilla from the Leuven University Hospital (at least 12 months in function) were recalled for a thorough examination. Forty-four patients (162 implants, Brånemark type) could be enrolled. Results: The mean loading time was 9 years (range: >1 to >20 years). The cumulative survival rate after 10 years of function was 99.3% if four to six interconnected implants supported the overdenture, but only 85.7% in case two non-connected implants were used as support. The marginal bone level in the former group remained stable, with changes comparable with those observed for implants supporting fixed full dental prostheses. Conclusions: These results fully support the overdenture treatment concept for the maxilla, at least when ,4 splinted implants are used. [source]

Immediate and early non-occlusal loading of Straumann implants with a chemically modified surface (SLActive) in the posterior mandible and maxilla: interim results from a prospective multicenter randomized-controlled study

CLINICAL ORAL IMPLANTS RESEARCH, Issue 5 2008
Axel Zöllner
Abstract Objective: Immediate and early loading of dental implants can simplify treatment and increase overall patient satisfaction. The purpose of this 3-year prospective randomized-controlled multicenter study was to assess the differences in survival rates and bone level changes between immediately and early-loaded implants with a new chemically modified surface (SLActive). This investigation shows interim results obtained after 5 months. Material and methods: Patients ,18 years of age missing at least one tooth in the posterior maxilla or mandible were enrolled in the study. Following implant placement, patients received a temporary restoration either on the day of surgery (immediate loading) or 28,34 days after surgery (early loading); restorations consisted of single crowns or two to four unit fixed dental prostheses. Permanent restorations were placed 20,23 weeks following surgery. The primary efficacy variable was change in bone level (assessed by standardized radiographs) from baseline to 5 months; secondary variables included implant survival and success rates. Results: A total of 266 patients were enrolled (118 males and 148 females), and a total of 383 implants were placed (197 and 186 in the immediate and early loading groups, respectively). Mean patient age was 46.3±12.8 years. After 5 months, implant survival rates were 98% in the immediate group and 97% in the early group. Mean bone level change from baseline was 0.81±0.89 mm in the immediate group and 0.56±0.73 mm in the early group (P<0.05). Statistical analysis revealed a significant center effect (P<0.0001) and a significant treatment × center interaction (P=0.008). Conclusions: The results suggested that Straumann implants with an SLActive can be used predictably in time-critical (early or immediate) loading treatment protocols when appropriate patient selection criteria are observed. The mean bone level changes observed from baseline to 5 months (0.56 and 0.81 mm) corresponded to physiological observations from other studies, i.e., were not clinically significant. The presence of a significant center effect and treatment × center interaction indicated that the differences in bone level changes between the two groups were center dependent. [source]

Factors influencing survival of reconstructions.

CLINICAL ORAL IMPLANTS RESEARCH, Issue 2007
Consensus report of Working Group
Abstract: In order to evaluate the level of evidence of factors influencing the survival of reconstructions, systematic reviews of the relevant literature were prepared by a group of rapporteurs. The review papers were circulated to the members of the group before the conference and formed the basis for group and panel discussions. Subsequently, modifications were added to the review papers, and suggestions for consensus statements concerning the following topics were prepared and again critically reviewed in the group and in the plenum: Impact of (i) periodontal disease on the survival of tooth-supported reconstructions, (ii) post-surgical factors as supportive therapy on the survival of implant supported reconstructions, (iii) technical and/or biological complications on the survival of different types of reconstructions, (iiii) material choice for reconstructions on the survival of single crowns and fixed dental prostheses. [source]

Psychological impact on implant patients' oral health-related quality of life

CLINICAL ORAL IMPLANTS RESEARCH, Issue 2 2006
Abu Hantash Ra'ed Omar
Abstract Objectives: The literature has shown that patients' satisfaction with dental prostheses is associated with the existence of certain personality profiles. It is important to study such relationships in dental implant patients. Material and methods: Fifty patients (28 men and 22 women), aged between 22 and 71 years (mean age 43.22 years, SD 12.24 years), who were partially edentulous and were seeking dental implant therapy were entered into this study. The patients were requested to answer two reliable and valid questionnaires , the Dental Impact on Daily Living (DIDL) and the Neuroticism Extraversion Openness Five-Factor Inventory (NEO-FFI) , before implant treatment and 2,3 months after prosthodontic rehabilitation therapy. Results: Certain personality traits were found to have a significant relationship with patients' satisfaction with dental implants both before and after implant therapy (P<0.05). Neuroticism score had valuable features in predicting patients' total satisfaction ratings (P=0), satisfaction with appearance dimension (P=0), satisfaction with oral comfort dimension (P=0.005) as well as satisfaction with general performance dimension (P=0). Conclusion: Personality traits have an impact on patients' satisfaction with dental implant therapy. In addition, personality traits provide valuable information for the prediction of patients' satisfaction with their implant-supported prostheses. Neuroticism, openness, agreeableness and consciousness are very helpful in this regard. Neuroticism was found the main predictor of the patients' oral health-related quality of life following implant treatment. [source]

Socioeconomic indicators and prosthetic replacement of missing teeth in a working-age population,Results of the Study of Health in Pomerania (SHIP)

COMMUNITY DENTISTRY AND ORAL EPIDEMIOLOGY, Issue 2 2009
Torsten Mundt
Abstract,,, Objectives:, To analyse the possible effects of the socioeconomic status (SES) on the prosthetic replacement of missing teeth in working-age people and to explore the role of potential confounders. Methods:, Cross-sectional data were collected from 2310 German adults aged 30,59 years. The relationship between each of the three SES indicators (education, income, and occupational status) and dental prostheses were examined by multinomial logistic regression analyses. For that, partially dentate participants with suboptimal and no replacement of missing teeth were compared with partially dentate participants having optimal replacement. Potential confounders (age, sex, dental status, social network and social support) were entered if their inclusion in the model led to ,10% change in the coefficient of interest. Results:, Social network and social support did not meet the criterion for confounding. In the maxilla, having no replacement was positively associated with lower categories for each of the three SES indicators [Odds ratios (OR) between 1.6 and 2.1; 95% confidence intervals (CI) between 1.1 and 3.4]. Low occupational status was the single predictor for suboptimal dental prostheses (OR = 3.2; 95% CI: 1.6,6.2). In the mandible, occupational status showed no association with the prosthetic status, whereas low educational level and low household income were determinants for having no replacement (OR = 1.9 and 1.9, 95% CI: 1.0,3.5 and 1.1,3.0, respectively). Low household income was the single determinant for suboptimal replacement of missing teeth (OR = 2.4, 95% CI = 1.1,5.2). Conclusion:, The findings may indicate the relevance of the financing of prosthodontic treatment. The strong association between various forms of upper dentures and occupational prestige can be seen as key contributing concept to how individuals, characteristics affect the outcome in prosthodontic care. [source]

Accelerated rehabilitation of an edentulous patient with an implant retained dental prosthesis: a case report

GERODONTOLOGY, Issue 3 2007
Gerald McKenna
This case report details the successful rehabilitation of an edentulous patient using a complete upper prosthesis and a lower implant retained overdenture. The provision of care was split between a specialist centre and a primary care setting. This approach reduced inconvenience to the patient. Modern surgical and prosthodontic techniques also reduced the total delivery time. After initial consultation a new set of complete dentures was prescribed with changes in design to the originals. The patient was also planned for placement of two mandibular implants to stabilise and retain the mandibular denture. The first line of treatment involved provision of a new set of dentures constructed by the patient's general dental practitioner. Dental implants were then placed in a specialist centre and the patient returned to the dental practice for attachment of the lower denture to the dental implants. The benefits and success of mandibular implant retained dentures are well documented. With delivery of the overdenture, the patient reported increased satisfaction with his prostheses which allowed him to eat a greater range of foods and enabled him to feel confident when speaking and socialising. [source]

Late-onset Papillon,Lefevre syndrome with pyogenic liver abscesses: report of one case

INTERNATIONAL JOURNAL OF DERMATOLOGY, Issue 1 2009
Ameneh Yazdanfar MD
A 25-year-old woman living in Hamedan, Iran, presented originally at 7 years of age with erythematous, hyperkeratotic lesions on the palms and soles with extension to the dorsal side of the hands and feet. Involvement of the elbows and knees was also seen. From 12 years of age, she started to lose her teeth. At the same age, she experienced fever, chills, malaise, myalgia, and right upper quadrant abdominal pain. With a diagnosis of pyogenic liver abscesses, the patient underwent successful surgical treatment. ,Examination revealed erythematous, hyperkeratotic, scaling plaques on the palms and soles, dorsal side of the hands and feet (Fig. 1), elbows and knees. All the teeth were missing from the mouth (Fig. 2), and she used a dental prosthesis. A surgical scar was observed on the right upper quadrant of the abdomen (Fig. 3). Skull X-ray and computed tomography scan were normal. Skin biopsy of the dorsal right hand demonstrated hyperkeratosis, focal parakeratosis, hypergranulosis, and acanthosis with a mild inflammatory infiltrate around the vessels (Fig. 4). Figure 1. Hyperkeratotic plaques on the hands and feet Figure 2. Loss of permanent teeth Figure 3. Surgical scar on the right upper quadrant of the abdomen and hyperkeratotic plaques on the hand Figure 4. Hyperkeratosis, focal parakeratosis, hypergranulosis, and acanthosis (hematoxylin and eosin, ×40) [source]

Pulmonary aspiration of a two-unit bridge during a deep sleep

JOURNAL OF ORAL REHABILITATION, Issue 6 2005
Ö. K. BA
summary, Aspiration of teeth and dental restorations is a recognized, yet an infrequent happening in the literature. Main reasons of aspiration are maxillofacial trauma, dental treatment procedures or ethanol intoxication and dementia. The present case of a 2-unit bridge aspiration is however, not related with any trauma, dental procedure or systemic disease. A 37-year-old male patient had aspirated his bridge while sleeping and the bridge remained unidentified for 1 year despite the radiographic controls. He was then referred to the Chest Diseases Department of School of Medicine, Ege University and the radio-opaque object in the right intermediate bronchus was diagnosed to be an aspirated dental prosthesis. Subsequent to the failure of the rigid bronchoscopy, the patient was referred to the Thoracic Surgery Department and had to be operated for retrieval of the foreign body. [source]

Laser-Welded Hollow Pontic Full-Gold Fixed Dental Prosthesis

Resolution of orofacial granulomatosis with amalgam removal

JOURNAL OF THE EUROPEAN ACADEMY OF DERMATOLOGY & VENEREOLOGY, Issue 3 2003
E Guttman-Yassky
ABSTRACT A 61-year-old woman presented with a 2-year history of an abnormal erythematous swelling on the upper lip and cheek. Upon examination there were no other physical findings. Histological examination found discreet sarcoidal granulomas in the lower dermis. Routine laboratory studies, chest radiographs and pulmonary functions were all normal. Clinical presentation and histological findings were, therefore, compatible with the diagnosis of orofacial granulomatosis (OFG). The patient was patch tested with an extended standard series that included metal,salt, dental prosthesis, bakery and corticosteroids series. The patch test was positive (score ++) after 48 and 72 h for mercury in the metal,salt and dental prosthesis series. During the past decade the patient had received amalgam fillings of several dental cavities, including one adjacent to the swollen cheek. The unilateral localization of the soft tissue swelling adjacent to the amalgam tooth fillings, along with the positive patch test for mercury, raised the possibility that the OFG was part of a delayed hypersensitive reaction to the fillings. The patient therefore underwent a total amalgam replacement procedure; complete disappearance of the swelling overlying the right cheek was observed within 7 weeks and the swelling of the upper lip subsided completely within 6 months. We propose that mercury in amalgam tooth fillings is another cause of OFG and suggest appropriate patch testing in patients who do not have an apparent cause of OFG. [source]

Successful outcome of splinted implants supporting a ,planned' maxillary overdenture: a retrospective evaluation and comparison with fixed full dental prostheses

Bone level changes at implants supporting crowns or fixed partial dentures with or without cantilevers

CLINICAL ORAL IMPLANTS RESEARCH, Issue 10 2008
Gian Andrea Hälg
Abstract Objective: The aim of this study was to analyze whether or not a cantilever extension on a fixed dental prosthesis (FDP) supported by implants increased the amount of peri-implant bone loss or technical complications compared with reconstructions without cantilevers. Materials and Methods: Fifty-four partially dentate patients with a total of 54 FDPs supported by 78 implants were enrolled in the study. Twenty-seven FDPs were with cantilever and 27 FDPs were without cantilever (control group). All FDPs were supported by one or two implants and were located in the posterior maxilla or mandible. The primary outcome variable was change in peri-implant marginal bone level from the time of FDP placement to the last follow-up visit. FDPs were under functional loading for a period of 3 up to 12.7 years. Statistical analysis was carried out with Student's t -test. Regression analyses were carried out to evaluate the influence of confounding factors on the peri-implant bone level change. In addition, implant survival rates were calculated and technical complications assessed. Results: After a mean observation period of 5.3 years, the mean peri-implant bone loss for the FDPs with cantilevers was 0.23 mm (SD±0.63 mm) and 0.09 mm (SD±0.43 mm) for FDPs without cantilever. Concerning the bone level change at implants supporting FDPs with or without cantilevers no statistically significant differences were found. The regression analysis revealed that jaw of implant placement had a statistically significant influence on peri-implant bone loss. When the bone loss in the cantilever group and the control group were compared within the maxilla or mandible separately, no statistically significant difference was found. Implant survival rates reached 95.7% for implants supporting cantilever prostheses and 96.9% for implants of the control group. Five FDPs in the cantilever group showed minor technical complications, none were observed in the control group. Conclusion: Within the limitations of this study it was concluded that cantilever on FDPs did not lead to a higher implant failure rate and did not lead to more bone loss around supporting implants compared with implants supporting conventional FDPs. In contrast to these results more technical complications were observed in the group reconstructed with cantilever. [source]

Rehabilitation with dental prosthesis can increase cerebral regional blood volume

CLINICAL ORAL IMPLANTS RESEARCH, Issue 6 2005
Ikuya Miyamoto
Abstract: Treatment with denture for edentulous people is highly important for maintaining quality of life. However, its effect on the brain is unknown. In this experimental study, we hypothesized that dental prosthesis can recover not only the physical condition of mastication system but also the regional brain activity. We evaluated functional brain imaging of edentulous subjects fixed by dental implant prosthesis with clenching tasks by multi-channel near-infrared optical topography. Results revealed a significantly (P<0.001; paired t -test) increased cerebral regional blood volume during maximum voluntary clenching task by implant-retained prosthesis. There were no statistically significant differences between patients with and without prosthesis in the latency to the maximum regional blood volume after the task. Conclusively, clenching can be effective for increasing cerebral blood volume; accordingly maintenance of normal chewing might prevent the brain from degenerating. Résumé Le traitement par prothèses des édentés est extrêmement important pour garder la qualité de vie. Cependant, son effet sur le cerveau est inconnu. Dans cette étude expérimentale, l'hypothèse qui a étéémise concernait les prothèses dentaires et leur aptitude à rétablir non seulement la condition physique du système masticatoire mais également l'activité cérébrale régionale. L'imagerie du cerveau fonctionnel de l'édenté avec des prothèses sur implants avec travail de serrage par topographie optique près de l'infrarouge à multiple canaux. Les résultats ont révélé une augmentation significative (P<0.001/test-t par paires) de la circulation sanguine régionale cérébrale durant la force de serrage volontaire maximale par les prothèses retenues sur implants. Il n'y avait aucune différence significative entre les avec et sans prothèses dans le temps de latence jusqu'à la circulation sanguine régionale maximale après le serrage. Le serrage peut être efficace pour augmenter la circulation sanguine cérébrale et donc le maintien d'une mastication normale pourrait prévenir toute dégénérescence cérébrale. Zusammenfassung Die Versorgung mit Prothesen bei zahnlosen Patienten ist sehr wichtig, um die Lebensqualität zu erhalten. Der Einfluss auf das Gehirn ist jedoch nicht bekannt. In dieser experimentellen Studie stellten wir die Hypothese auf, dass eine dentale Prothese nicht nur den physischen Zustand des Kausystems wieder herstellen kann, sondern auch die regionale Hirnaktivität beeinflusst. Wie untersuchten funktionelle Gehirnbilder von zahnlosen Subjekten mit auf Implantaten befestigten Prothesen, welche Aufgaben beim Zusammenbeissen erledigen mussten, mittels multi-kanal optischer Topographie nahe am Infrarotbereich. Die Resultate zeigten einen signifikanten (P<0.001; gepaarter t -Test) Anstieg in der regionalen cerebralen Durchblutung während des Maximums beim freiwilligen Zusammenbeissen mit der auf Implantaten befestigten Prothese. Es bestanden keine statistisch signifikanten Unterschiede in der Latenzzeit bis zur maximalen regionalen Durchblutung nach Erfüllung der Aufgabe mit oder ohne Prothese. Es wird die Schlussfolgerung gezogen, dass das Zusammenbeissen zu einem Ansteigen der cerebralen Durchblutung führen kann. Daher könnte der Erhalt einer normalen Kaufunktion einer Degeneration des Gehirn entgegenwirken. Resumen El tratamiento con dentaduras para personas edéntulas es altamente importante para conservar la calidad de vida. En este estudio experimental, hemos hipotizado que las prótesis dentales pueden recuperar no solo las condiciones físicas del sistema masticatorio sino también la actividad cerebral regional. Hemos evaluado las imágenes funcionales del cerebro de pacientes edéntulos rehabilitados por prótesis implantosoportadas con tareas de apretado por medio de topografía óptica casi-infrarroja multicanal. Los resultados revelaron un flujo sanguíneo cerebral regional significativamente (P<0.001; t -test pareado) aumentado durante la mordida máxima voluntaria con prótesis implantosoportada. No hubo diferencias estadísticamente significativas entre con o sin prótesis en la latencia al flujo sanguíneo regional tras la tarea. En conclusión, el apretado puede ser efectivo para incrementar el flujo sanguíneo cerebral; en consecuencia, el mantenimiento de una masticación normal puede prevenir la degeneración cerebral. [source]