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Primary Molars (primary + molar)

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Medical Sciences	100%

Terms modified by Primary Molars

primary molar tooth

Selected Abstracts

Crown-root fracture of a lower first primary molar: report of an unusual case

DENTAL TRAUMATOLOGY, Issue 3 2008
Gabriela da Rosa Götze
Abstract,,, Dental traumas are highly prevalent lesions in primary teeth, but crown-root fractures are seldom observed in posterior teeth of this dentition. The aim of the present report was to describe the diagnosis, treatment, and a 24-month follow-up of an unusual case of complicated crown-root fracture in a lower first primary molar of a 3-year-old boy. [source]

Classification and sequelae of arrested eruption of primary molars

INTERNATIONAL JOURNAL OF PAEDIATRIC DENTISTRY, Issue 1 2008
INGER KJÆR
Aim., The aim of this study was to classify early arrested eruption of primary molars and to analyse and explain the sequelae for the surrounding alveolar bone and the succeeding premolar. Design., The position of the arrested primary molars in the mandible, the height of the local alveolar bone, and the morphology and location of the succeeding premolar were evaluated on radiographs from 29 children. Results., Four groups of arrest from mild to severe with regards to infra-position were categorized (Groups I,IV). Mean ages at the time of referral decreased from Groups I (8 years, 10 months) to Group IV (5 years, 9 months). Sequelae., (i) Reduction of alveolar bone height (Groups I,III); (ii) delayed maturity of the succeeding premolar (two-thirds of the cases); (iii) malformation of the succeeding premolar (mainly Groups III and IV); and (iv) ectopically located premolar occlusal to the retained molar (Group IV). Conclusions., The deeper in the alveolar process a primary molar is retained, the earlier the disturbance in the eruption has occurred, and the greater is the risk of the permanent tooth germ being malformed and malpositioned. It is estimated that the earliest occurrences of arrested eruption of primary molars supposedly occur before the age of 3. [source]

Influence of local anaesthesia on the quality of class II glass ionomer restorations

INTERNATIONAL JOURNAL OF PAEDIATRIC DENTISTRY, Issue 4 2007
NANDA VAN DE HOEF
Objective., To investigate the influence of local anaesthesia on the quality of class II glass ionomer restorations with discomfort as cofactor. Material and methods., The study population consisted of 6- to 7-year-old schoolchildren in Paramaribo and its environs. To be included, each child needed to have a proximally situated cavity in a primary molar that was accessible to hand instruments and where no pulp exposure was expected. They were randomly divided into four treatment groups: conventional method with and without local anaesthesia and atraumatic restorative treatment method (ART) with and without local anaesthesia. The restoration quality was scored using the evaluation criteria for ART restorations (successful if restoration is correct or has a minor defect and fails if defects are larger than 0.5 mm, if secondary caries is observed, if the restoration is fractured, partly or totally lost or if the pulp is involved) at 6 and 30 months after treatment. The extent of discomfort was registered by assessing the behaviour (modified Venham score) and observing the heart rate during treatment. Results., For this study 153 children were treated with hand instruments (ART) and 146 children with rotary instruments (conventional method). A total of 198 restorations were evaluated during follow-up periods. There were no significant differences in patient discomfort between the ART and the conventional group and between the anaesthesia and the non-anaesthesia group. The conventional restorations demonstrated significantly higher success rates than ART restorations after 6 (P = 0.001) and 30 months (P = 0.032). There were no significant differences in success rate between the anaesthesia and the non-anaesthesia group. Conclusion., Local anaesthesia has no influence on discomfort during treatment. Furthermore, discomfort during treatment does not affect the success rate of restorations. [source]

Radicular cyst associated with a primary molar following pulp therapy: a case report

INTERNATIONAL JOURNAL OF PAEDIATRIC DENTISTRY, Issue 6 2001
M. Takiguchi
Summary. A radicular cyst arising from the primary second molar and causing displacement of the permanent successor to the lower border of the mandible, with accompanying buccal expansion, was examined clinically and radiographically. Extraction of the primary molar and extirpation of the cyst led to uneventful healing. The primary molar had received pulp treatment with therapeutic agents approximately 1·5 years prior to the patient's first visit. The relationship between pulp treatment and rapid growth of the radicular cyst is discussed. [source]

The Occurrence of Dental Pain and Extractions over a 3-Year Period in a Cohort of Children Aged 3-6 Years

JOURNAL OF PUBLIC HEALTH DENTISTRY, Issue 2 2008
M. Tickle PhD
Abstract Objectives: To describe the occurrence of dental pain and extractions in young children in relation to the caries and restoration history of their primary molar teeth. Methods: A prospective cohort study of 739 children aged 2.8 to 6.2 years attending 50 dental practices in the North West of England followed for 3 years. Incidence rates for pain and extraction in primary molar teeth were calculated for children with and without dental caries. Tooth years at risk of extraction or pain were calculated for each primary molar according to whether they were caries-free, carious and unrestored, or restored. Results: A total of 119 (16.1 percent) children had caries at recruitment and 157 developed caries during follow-up. Each year approximately one in five children with caries, but only one in 100, who was caries-free, presented with dental pain. In the whole population, each year, approximately one in 40 children had a primary molar tooth extracted but in children with caries it was one in 10. In the total cohort, incidence of pain was higher in unrestored carious teeth than restored, but incidence of extraction was higher in restored than in unrestored teeth. Conclusion: The majority of children attending general dental practice remained caries-free and did not experience pain or extraction over 3 years. Children with caries had a substantial risk of developing pain or having an extraction. The study was unable to demonstrate that restoring carious primary molar teeth prevents pain and extraction. [source]

Usage of white mineral trioxide aggregate in a non-vital primary molar with no permanent successor

AUSTRALIAN DENTAL JOURNAL, Issue 1 2010
E Sen Tunc
Abstract The aim of this study was to present the treatment and long-term follow-up of a case in which white mineral trioxide aggregate (WMTA) was used in the pulpectomy of a non-vital primary molar with no permanent successor. The physiological, aesthetic and functional consequences of treating primary teeth without permanent successors makes this a unique challenge. In the present case, WMTA was used in the pulpectomy of a primary molar with no permanent successor in an 8-year-old child. The treatment was considered successful. Follow-up examinations showed that root resorption in the mesial root surface, with no infra-occlusion or ankylosis 36 months after treatment. WMTA may be considered as an alternative pulpectomy material for non-vital primary teeth with no permanent successors, although long-term clinical studies are still needed. [source]

Clinicians choices of restorative materials for children

AUSTRALIAN DENTAL JOURNAL, Issue 4 2003
LA Tran
Abstract Background: Recently, there has been an expansion in the range of tooth-coloured restorative materials available. In 1999, the National Health and Medical Research Council recommended clinicians use alternatives to amalgam in children ,where appropriate'. Methods: A three-part 29-item questionnaire was developed, tested in a focus group, and distributed to members of the Australasian Academy of Paediatric Dentistry (AA; paediatric dentists and paediatric dentistry postgraduate students; n=55), and the Australian and New Zealand Society of Paediatric Dentistry, Victorian Branch (SPD; general dentists and dental therapists; n=50). Participant information, material choices, and six hypothetical clinical scenarios were addressed. Results: The overall response rate was 74 per cent. For both groups, the first ranked factor influencing choice of restorative material for vital primary teeth was child age, and caries experience for vital first permanent molars. For moderate-sized Class I and II restorations in primary molars, a tooth-coloured material was chosen by 92 and 84 per cent respondents respectively. For restoring two separate proximal lesions in a primary molar, 65 per cent chose a tooth-coloured material followed by a stainless steel crown (27 per cent; all AA members), then amalgam (8 per cent). The SPD respondents were significantly more likely to choose glass ionomer cement for Class I and II restorations and for restoring two proximal lesions (all p=0.000) in primary molars than AA respondents, who were more likely to choose composite resins/compomers or amalgam/stainless steel crowns for these restorations. Younger respondents (21,40 years) were significantly more likely to choose composite resins/compomers or amalgam/stainless steel crowns (p=0.048) than older respondents (41,65 years), who were likely to choose glass ionomer cement. Conclusions: For Class I and II restorations in primary molars, glass ionomer cement was the material chosen most frequently (SPD respondents); preference for amalgam or stainless steel crowns was low (both SPD and AA groups). The wide range of materials chosen for the hypothetical clinical scenarios suggests the need for guidelines on selection of restorative materials, and the need for longitudinal studies to follow actual clinical outcomes of the materials chosen. [source]

Multiple crown-root fractures in primary molars and a suspected subcondylar fracture following trauma: a report of a case

DENTAL TRAUMATOLOGY, Issue 2 2008
Zahra Tejani
Injuries to the primary dentition are usually luxations and mandibular fractures rarely occur. With trauma sustained to the chin, the posterior primary teeth are at increased risk of trauma and mandibular fractures can occur. The case discussed is of a 4-year-old female who presented 2 weeks following dental trauma with multiple primary molar fractures and a possible subcondylar fracture. The need for a detailed examination is emphasized and the management of the case under general anaesthesia is described. [source]

Accuracy of an electronic apex locator in primary teeth with root resorption

INTERNATIONAL ENDODONTIC JOURNAL, Issue 2 2009
O. Angwaravong
Abstract Aim, To evaluate whether root resorption of primary molar teeth affects the accuracy of the Root ZX apex locator and to compare the Root ZX at different meter readings with direct canal measurement. Methodology, Sixty extracted primary molar teeth with root resorption affecting one sixth to one third of root length were used. The teeth were embedded in an alginate model. A K-type file was used in association with a Root ZX apex locator to measure canal length. Measurements were recorded using the Root ZX meter reading ,Apex' and ,0.5 bar'. Actual tooth length was measured with a K-file to the major foramen. All measurements were read under a stereomicroscope at 15× magnification. The deviation of the Root ZX measurement from the actual canal length was determined. Results, Mean differences between Root ZX length meter reading ,Apex' and actual length were 0.01 ± 0.23 mm whereas mean differences between Root ZX length meter reading ,0.5 bar' and actual length were ,0.33 ± 0.30 mm. The Root ZX was 96.7% accurate to within ± 0.5 mm of the apical foramen when compared with the actual canal length of primary molars with root resorption. Conclusions, Using a criterion of ± 0.5 mm, the accuracy of the Root ZX was high and not affected by root resorption. When compared with direct canal measurement, the error in locating the apical foramen was smaller with measurement at meter reading ,Apex' than meter reading ,0.5 bar'. [source]

Pulpal status of human primary teeth with physiological root resorption

INTERNATIONAL JOURNAL OF PAEDIATRIC DENTISTRY, Issue 1 2009
JOANA MONTEIRO
Objective., The overall aim of this study was to determine whether any changes occur in the pulpal structure of human primary teeth in association with physiological root resorption. Methods., The experimental material comprised 64 sound primary molars, obtained from children requiring routine dental extractions under general anaesthesia. Pulp sections were processed for indirect immunofluorescence using combinations of: (i) protein gene product 9.5 (a general neuronal marker); (ii) leucocyte common antigen CD45 (a general immune cell marker); and (iii) Ulex europaeus I lectin (a marker of vascular endothelium). Image analysis was then used to determine the percentage area of staining for each label within both the pulp horn and mid-coronal region. Following measurement of the greatest degree of root resorption in each sample, teeth were subdivided into three groups: those with physiological resorption involving less than one-third, one-third to two-thirds, and more than two-thirds of their root length. Results., Wide variation was evident between different tooth samples with some resorbed teeth showing marked changes in pulpal histology. Decreased innervation density, increased immune cell accumulation, and increased vascularity were evident in some teeth with advanced root resorption. Analysis of pooled data, however, did not reveal any significant differences in mean percentage area of staining for any of these variables according to the three root resorption subgroups (P > 0.05, analysis of variance on transformed data). Conclusions., This investigation has revealed some changes in pulpal status of human primary teeth with physiological root resorption. These were not, however, as profound as one may have anticipated. It is therefore speculated that teeth could retain the potential for sensation, healing, and repair until advanced stages of root resorption. [source]

Stainless steel crown versus modified open-sandwich restorations for primary molars: a 2-year randomized clinical trial

INTERNATIONAL JOURNAL OF PAEDIATRIC DENTISTRY, Issue 5 2008
MOMEN ATIEH
Objective., The aim of this study was to investigate the clinical performance and survival of stainless steel crown (SSC) restoration and modified open-sandwich technique using resin-modified glass ionomer cement. Design., Randomized clinical trial. Setting., General dental practice. Materials and methods., A total of 87 children aged 4,7 years at baseline with one or more primary molars that have undergone pulp therapy were randomly assigned to receive either SSC or modified open-sandwich restoration. One hundred and sixty restorations were placed and evaluated after 6, 12, 18, and 24 months using the Ryge criteria. Results., Comparable survival rates were observed for both SSC and modified open-sandwich restoration. With only four SSCs and six modified open-sandwich restorations failing over 24 months, the survival rates were high for both materials (2-year survival rate: 95.0% for SSCs and 92.5% for modified open-sandwich restorations). Significantly better gingival health (P < 0.05) was observed for the modified open-sandwich restorations compared with SSCs, as only one modified open-sandwich restoration was rated Charlie compared to 13 SSCs. No significant differences were observed between the two materials for marginal integrity, proximal contact, occlusion, or recurrent caries. Conclusion., The 2-year results indicated that the modified open-sandwich restoration is an appropriate alternative to SSC in extensive restorations, particularly where aesthetic considerations are important. [source]

Classification and sequelae of arrested eruption of primary molars

Compomers in restorative therapy of children: a literature review

INTERNATIONAL JOURNAL OF PAEDIATRIC DENTISTRY, Issue 1 2007
NORBERT KRÄMER
Objective., The restoration of carious primary teeth plays an underestimated role in paediatric dentistry. This is astonishing for many reasons, not least because many new materials have been introduced in recent years. New or modified techniques and materials, with better aesthetics and flexural properties, allow minimally invasive treatment. A transfer of techniques between different dentitions, however, may be problematic because of both micromorphological differences and compliance. Therefore, this paper deals with options for restoring primary teeth and the early stages of the mixed dentition using polyacid-modified composites, the so-called compomers. Methods., Medline and Embase were scanned from 1990 through 2006. Furthermore, a hand-search of nonlisted but peer-reviewed papers was performed. The search items were compomer*, dent*, primary* and deciduous*, which identified 109 relevant publications. Conclusions., Based on high clinical success rates, compomers are now an effective alternative to other materials for restorative therapy in the anterior and posterior primary teeth. A minimum amount of compliance is still mandatory in order to allow for a few minutes of adhesive pretreatment and layering without contamination. If this is not the case, compomers make no sense. Stainless steel crowns are still the most effective from of restoration for severely decayed primary molars. [source]

Clinical randomized controlled trial of chemomechanical caries removal (CarisolvÔ)

INTERNATIONAL JOURNAL OF PAEDIATRIC DENTISTRY, Issue 3 2006
M. A. LOZANO-CHOURIO
Summary., Objectives., The purpose of this study was to compare the chemomechanical caries-removal system (CarisolvÔ) with high-speed excavation in cavitated occlusal caries of primary molars. Design and setting., The study was a randomized controlled, clinical trial in which the two techniques were compared in each subject. Participants were chosen from public schools, in Maracaibo County, Zulia State, Venezuela. Sample and methods. The sample consisted of 80 primary molars selected from 40 children (mean age 7·7 ± 0·7 years). Each patient had at least two contralateral primary molars with cavitated occlusal caries and approximately equal-size access to lesions. The outcome variables were: clinically complete caries removal, size of the opening of the cavity, volume of carious tissue removed, pain during caries removal, anaesthesia requested by the patient, caries-removal time, and behaviour and preference of patients. Results., All treated molars were clinically caries free whichever caries-removal procedure was used. When Carisolv, was used the final cavity entrance sizes were smaller (P < 0·001) and the estimated volume of tissue removed was less (P < 0·001). The time taken for caries removal was three times longer (7·51 ± 1·83 min, P < 0·001). Some pain was reported by seven (17·5%) participants when Carisolv was used, compared with 16 (40%) when high-speed excavation was used (P < 0·05). Using the Carisolv method there was a higher proportion of patients with positive behaviour (P < 0·01), and 71·0% (P < 0·05) preferred this treatment. Conclusion., Carisolv is an effective clinical alternative treatment for the removal of occlusal dentinal caries in cavitated primary molars; it is more conservative of dental tissue and appeared to be more comfortable for most patients, although the clinical time spent is longer than when using high-speed excavation. [source]

Immunocytochemical investigation of immune cells within human primary and permanent tooth pulp

INTERNATIONAL JOURNAL OF PAEDIATRIC DENTISTRY, Issue 1 2006
H. D. RODD
Summary. Aim., The aim of this study was to determine whether there are any differences in the number and distribution of immune cells within human primary and permanent tooth pulp, both in health and disease. Design., The research took the form of a quantitative immunocytochemical study. One hundred and twenty-four mandibular first permanent molars and second primary molars were obtained from children requiring dental extractions under general anaesthesia. Following exodontia, 10-µm-thick frozen pulp sections were processed for indirect immunofluorescence. Triple-labelling regimes were employed using combinations of the following: (1) protein gene product 9·5, a general neuronal marker; (2) leucocyte common antigen (LCA); and (3) Ulex europaeus I lectin, a marker of vascular endothelium. Image analysis was then used to determine the percentage area of immunostaining for LCA. Results., Leucocytes were significantly more abundant in the pulp horn and mid-coronal region of intact and carious primary teeth, as compared to permanent teeth (P < 0·05, anova). Both dentitions demonstrated the presence of well-localized inflammatory cell infiltrates and marked aborization of pulpal nerves in areas of dense leucocyte accumulation. Conclusions., Primary and permanent tooth pulps appear to have a similar potential to mount inflammatory responses to gross caries The management of the compromised primary tooth pulp needs to be reappraised in the light of these findings. [source]

Conventional versus resin-modified glass-ionomer cement for Class II restorations in primary molars.

INTERNATIONAL JOURNAL OF PAEDIATRIC DENTISTRY, Issue 1 2003
A 3-year clinical study
Summary. Objective. To compare the clinical performance of two glass-ionomer cements (GICs)for Class II restorations in primary molars: a conventional cement (Fuji II®) and a resin-modified cement (Vitremer®). Design. Split mouth and random assignment to the two materials were used for the majority of the molars. Sample and methods. Forty consecutive 4,7-year-old children were included. One operator made 115 restorations: 53 with Vitremer and 62 with Fuji II. The restorations were evaluated clinically, radiographically and from colour photographs. Results. The cumulative success rate of the Vitremer restorations was 94% and that of the Fuji II restorations 81%. The difference is statistically significant. The risk of a failed restoration was more than five times higher with Fuji II than with Vitremer as the restorative material. Of the 13 unsuccessful restorations, seven had lost their retention, four had secondary caries, and two were fractured. Conclusions. The resin-modified GIC offered advantages over the conventional GIC for restoring approximal caries in primary molars. [source]

Detection of in vitro demineralization of primary teeth using quantitative light-induced fluorescence (QLF)

INTERNATIONAL JOURNAL OF PAEDIATRIC DENTISTRY, Issue 3 2002
I. A. Pretty
Summary. Introduction. With the advent of remineralizing therapies and the new, conservative approach to restoration placement, interest in detecting and monitoring subclinical, precavitated lesions has increased. The increased understanding of clinicians about the processes of primary and secondary prevention and the detection of lesions to which these therapies may be applied, is one of the current goals in caries management. Quantitative light-induced fluorescence (QLF) is a new method for the detection of very early caries. Objectives. To determine the ability of QLF to detect and longitudinally monitor in vitro enamel demineralization. To present the device to the paediatric community and present future in vivo uses of the device. Design. An in vitro study with combined in vivo pilot. Sample and methods. Twelve previously extracted, caries free, primary molars were selected and prepared. Two teeth were randomly selected as controls. Teeth were prepared by gentle pumicing and coating in an acid-resistant nail-varnish, except for an exposed window on the buccal surface. QLF baseline images were taken and the teeth then exposed to a demineralizing solution. Teeth were removed at regular intervals (24, 48, 72, 96, 120, and 144 h), air-dried and QLF images taken. QLF images were analysed by a single, blinded examiner (to control, to length of exposure). Mineral loss, as measured by ,Q, was recorded. Results. Demineralization was noted in all experimental teeth by 48 h, and within 24 h in six teeth. The QLF successfully monitored the increase in mineral loss over time (P < 0·05). The detected lesions were not visible clinically until 144 h and then in only the most severe lesions. No demineralization was detected by QLF in control teeth. The device was user- and patient-friendly in vivo, detecting subclinical lesions. Conclusion. Detection of very early mineral loss and subsequent monitoring of this loss is possible in primary teeth using QLF. The device is well suited to use in paediatric dentistry and offers applications for both clinicians and researchers. The determination of the status of carious lesions (active/inactive) will be possible with readings taken at recall appointments. [source]

Three-year clinical performance of glass ionomer cement in primary molars

INTERNATIONAL JOURNAL OF PAEDIATRIC DENTISTRY, Issue 2 2002
J. Rutar
No abstract is available for this article. [source]

Diagnosis of occlusal caries in primary teeth

INTERNATIONAL JOURNAL OF PAEDIATRIC DENTISTRY, Issue 2 2000
Ashley
Much research has been published over the last few years looking at alternative diagnostic systems for the diagnosis of occlusal caries in permanent teeth, but there has been little research on primary teeth. The aim of this study was to compare the accuracy of one alternative system (the Electronic Caries Monitor [ECM]) against visual diagnosis for the detection of occlusal dentine caries in primary teeth. Fifty-eight apparently noncavitated extracted first and second primary molars were selected. They were examined visually and with the ECM for dentine caries. Presence or absence of caries was validated by hemisecting the teeth and examining them under a stereo-microscope , 37 teeth had occlusal dentine caries, 21 were sound or had enamel caries. Sensitivities and specificities of the ECM diagnoses were 0·81 and 0·90, respectively, and for the visual diagnosis were 0·73 and 1. In conclusion, the ECM did not provide increased accuracy over visual diagnosis when detecting occlusal caries in primary teeth. [source]

Proliferative activity of cells from remaining dental pulp in response to treatment with dental materials

AUSTRALIAN DENTAL JOURNAL, Issue 1 2010
AN Lutfi
Abstract Background:, The biological examination of pulp injury, repair events and response of dental pulp stem cells to dental restorative materials is important to accomplish restorative treatment, especially to commonly used dental materials in paediatric dentistry, such as glass ionomer cement (GIC) and calcium hydroxide (Ca(OH)2) lining cement. Methods:, Healthy patients aged between 9 to 11 years with carious primary molars without pulp exposure were selected and divided into two groups: Group 1 (teeth restored with GIC) and Group 2 (teeth lined using Ca(OH)2 and restored with GIC). The proliferative activity of stem cells of teeth between these two groups was compared using colourimetric cell proliferation reagent, alamarBlue. Immunocytochemistry and flow cytometry confirmation were performed using mesenchymal stem cell markers, CD105 and CD166. Results:, The proliferative activity using alamarBlueÔ assay showed that cells derived from the remaining dental pulp of exfoliated deciduous teeth were positive for CD105 and CD166 and exhibited no difference between the two groups. Conclusions:, It can be concluded that the use of Ca(OH)2 or GIC as a lining material in indirect pulp capping procedures has the same effect on cells derived from the remaining dental pulp of exfoliated deciduous teeth which have responded favourably to the restorative treatments. [source]

Clinicians choices of restorative materials for children

The relationship between caries in the primary dentition at 5 years of age and permanent dentition at 10 years of age , a longitudinal study

INTERNATIONAL JOURNAL OF PAEDIATRIC DENTISTRY, Issue 3 2006
M. S. SKEIE
Summary., Objectives., To explore a possible relationship between the caries experience and pattern in the primary dentition at 5 years of age and the permanent dentition at 10 years of age. Further, to examine the possibility of predicting children in a caries-risk group at 5 years verified at 10 years of age. Materials and methods., A sample of 186 children (90 males) were clinically examined as 5-year-olds and re-examined as 10-year-olds by calibrated dentists. A five-graded diagnostic system including enamel caries was used. Bitewing radiographs were taken. A true risk group of children at 10 years were defined as those with at least one dentin or filled lesion on the mesial surface of 6-year molars, and/or on incisors, and/or total DMFS (decayed, missing, and filled surfaces) more than 1 SD above the mean. The prediction was measured in terms of OR (odds ratio), sensitivity/specificity, and receiver operating characteristic curves. Results., Statistically significant correlations (r = 0·5) were found between the caries experience in the two dentitions as well as between the primary second molars at baseline and the permanent teeth at 10 years. ,Primary second molars' and ,all primary molars' were the most powerful predictors for allocation into the risk group (24% of the sample). The highest achieved sum of sensitivity and specificity, 148%, was attained at a cut-off point above two carious surfaces in enamel and/or dentin in primary second molars. Conclusions., Statistically significant relationship in disease between the dentitions was found. More than two surfaces with caries experience in primary second molars are suggested as a clinically useful predictor at 5 years of age for being at high risk at age 10. [source]