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Color Match (color + match)
Selected AbstractsCLINICAL COLOR MATCH OF PORCELAIN VISUAL SHADE-MATCHING SYSTEMSJOURNAL OF ESTHETIC AND RESTORATIVE DENTISTRY, Issue 6 2005Stephen J. Chu DMD [source] Two-year follow-up of fractured anterior teeth restored with direct composite resin: report of three casesDENTAL TRAUMATOLOGY, Issue 5 2008Emre Ozel Fractures of maxillar central incisors including enamel and dentin were diagnosed. Beveling with diamond bur was performed in all four cases. Dentin was cleaned with tungsten carbid bur. The teeth were etched with 37% phosphoric acid, restored with an adhesive system and microhybrid composite. Finishing and polishing procedures were performed by discs (Sof-Lex) and burs. Restorations were found successful according to modified United States Public Health Service (USPHS) criteria after 2 years in terms of retention, color match, marginal discoloration, secondary caries, marginal adaptation, and surface texture. [source] Upper Eyelid Full-Thickness Skin Graft in Facial ReconstructionDERMATOLOGIC SURGERY, Issue 1 2005Dogan Tuncali MD Background The potentially available upper eyelid skin, as an alternative donor site, deserves more attention in clinical use. Objective The objective of this study was to prospectively evaluate the clinical behavioral characteristics of upper eyelid full-thickness skin grafts in facial reconstruction. Methods Sixteen patients who concluded the 12-month follow-up period were included in the study. Graft dimensions were measured in place before the graft harvest. Defect sizes were measured following lesion excision and postgrafting. Graft sizes were measured postoperatively at 1, 3, 6, and 12 months. Results The largest and smallest grafts were 46 × 22 mm and 40 × 15 mm (average 43.1 × 19.3 mm) in size, respectively. The largest and smallest defect dimensions were 33 × 23 mm and 17 × 9 mm (average 22.6 × 15.6 mm), respectively. The average postgrafting size was 21.1 × 14.6 mm. Grafts and donor sites healed very well. Generally, an acceptable to good texture and color match was observed beyond 6 months. Wound bed contraction was not observed beyond the first month (p < .05). Conclusion Special characteristics of hairless skin, good color and texture matching, and inconspicuous and hidden donor scar make the upper eyelid a good alternative donor site for small- to medium-sized facial skin defects. The main disadvantages that limit its clinical use are the age of the patient, a lack of adnexal structures, comparatively limited sun exposure, and possible insufficient thickness, especially when deep defects are of concern. DOGAN TUNCALI, MD, LEVENT ATES, MD, AND GÜRCAN ASLAN, MD, HAVE INDICATED NO SIGNIFICANT INTEREST WITH COMMERCIAL SUPPORTERS. [source] Spectrophotometric Analysis of Tooth Color Reproduction on Anterior All-Ceramic Crowns: Part 2: Color Reproduction and Its Transfer from In Vitro to In VivoJOURNAL OF ESTHETIC AND RESTORATIVE DENTISTRY, Issue 1 2010AKI YOSHIDA RDT ABSTRACT Color reproduction of an anterior tooth requires advanced laboratory techniques, talent, and artistic skills. Color matching in a laboratory requires the successful transfer from in vivo with careful considerations. The purpose of this study was to monitor and verify the color reproduction process for an anterior all-ceramic crown in a laboratory through spectrophotometric measurements. Furthermore, a crown insertion process using composite luting cements was assessed, and the final color match was measured and confirmed. An all-ceramic crown with a zirconia ceramic coping for the maxillary right central incisor was fabricated. There was a significant color difference between the prepared tooth and the die material. The die material selected was the closest match available. The ceramic coping filled with die material indicated a large color difference from the target tooth in both lightness and chromaticity. During the first bake, three different approaches were intentionally used corresponding with three different tooth regions (cervical, body, and incisal). The first bake created the fundamental color of the crown that allowed some color shifts in the enamel layer, which was added later. The color of the completed crown demonstrated an excellent color match, with ,E 1.27 in the incisal and 1.71 in the body. In the cervical area, color match with ,E 2.37 was fabricated with the expectation of a color effect from the underlying prepared tooth. The optimal use of composite luting cement adjusted the effect from the underlying prepared tooth color, and the color match fabricated at a laboratory was successfully transferred to the clinical setting. The precise color measurement system leads to an accurate verification of color reproduction and its transfer. CLINICAL SIGNIFICANCE The use of a dedicated dental spectrophotometer during the fabrication of an all-ceramic crown allows the dentist and the laboratory technician to accurately communicate important information to one another about the shade of the tooth preparation, the shade of the contralateral target tooth, and the influence of luting cement on the final restoration, thereby allowing the technician better control over the outcome of their tooth color matching efforts and the final color match of an all-ceramic restoration. (J Esthet Restor Dent 22:53,65, 2010) [source] A Prospective Ten-Year Clinical Trial of Porcelain VeneersJOURNAL OF ESTHETIC AND RESTORATIVE DENTISTRY, Issue 2 2006Article first published online: 25 APR 200 abstract Objective:, The purpose of this prospective clinical study was to evaluate the performance of porcelain veneers after 5 and 10 years of clinical service. Materials and Methods:, A single experienced clinician placed 87 porcelain veneers in 25 patients in 1990 and 1991. The teeth included maxillary central incisors to first premolars. As described in the 5-year report of this study, preparations included a chamfer margin, 0.3 to 0.7 mm labial enamel reduction, and incisal edge coverage. A single laboratory technician fabricated the veneers using feldspathic porcelain on refractory dies. Internal surfaces were etched with 5% hydrofluoric acid and silanated. Teeth were isolated with a rubber dam prior to veneer placement. All veneers were bonded with a light-activated resin cement. Patients were recalled at 5 to 6 years and at 10 years after initial veneer placement. Two evaluators examined each veneer for retention, fractures, color match, surface roughness, marginal adaptation, leakage, recurrent caries, pulp vitality, and patient satisfaction. Marginal adaptation was assessed further using scanning electron microscopy to examine epoxy replicas. Results:, Five years after placement, all 87 veneers remained in place and had "perfect" color match and surface smoothness. Four veneers had fractures, but only one of those required repair. Ninety-nine percent of the veneers had clinically acceptable marginal adaptation, although just 14% of the veneers had "perfect" marginal adaptation at all margins. One had clinically unacceptable staining from leakage. Recurrent caries was present at the proximal margin of two veneers. At the 10-year evaluation, which had a 93% recall rate, color match and surface roughness remained optimal. Thirteen of 22 patients were very satisfied with the esthetic result, whereas 7 complained of minor esthetic problems. The fracture rate increased substantially, to 34% at the 10-year recall. However, only 11% of the fractures were clinically unacceptable. None of the veneers had debonded, but the percentage of veneers with "perfect" marginal adaptation had declined to only 4%. Leakage was now evident around two-thirds of the veneers, and eight restorations had recurrent caries. Conclusion:, Porcelain veneers are a reliable and effective means for conservative esthetic treatment of anterior teeth in the long term. After 10 years of clinical service, esthetic results remained good, patient satisfaction was high, and the retention rate was excellent. The number of irreparable fractures was low. Appropriate preparation design, occlusion, and use of adhesive materials contribute to the ultimate outcome. [source] Acellular dermal allograft for vestibuloplasty,an alternative to autogenous soft tissue grafts in preprosthetic surgical procedures: A clinical reportJOURNAL OF PROSTHODONTICS, Issue 2 2003Monish Bhola DDS Various vestibular extension procedures have been described in the literature over the past 6 decades, including the use of free gingival grafts. An acellular dermal allograft has been used as a substitute for autogenous soft tissue grafts in root coverage procedures. This clinical report describes the use of such an allograft as a substitute for palatal donor tissue in the vestibular extension of an edentulous maxillary arch with multiple frenum attachments before fabrication of a complete denture. In this patient, healing was uneventful, and 6-month clinical observations demonstrated an apical positioning of the mucogingival junction with an increase in vestibular depth, and the absence of multiple frenae. The acellular dermal allograft appears to be a useful substitute for autogenous palatal grafts in preprosthetic surgery. This approach has many advantages over the free gingival graft, including no donor site morbidity, unlimited availability, and better color match. [source] | ||||||||||