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PubMed2001

A dental dream.

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Biocompatible Materials↗
PubMed2001

Surface roughness of aesthetic restorative materials: an in vitro comparison.

The purpose of this study was to compare the surface roughness of three types of aesthetic restorative material. Six standard samples of two brands of each type of material were prepared namely: hybrid composites (Prodigy, Z100), compomers (Compoglass F, Hytac Aplitip) and glass ionomer cements (Photac-Fil, Vitremer) in a perspex mould (N = 36). Upper and lower surfaces were covered with Mylar strips which, in turn, were covered with glass slides and compressed to express excess material. After light curing, specimens were stored in distilled water for 14 days. Thereafter, one side of each specimen was polished sequentially with medium, fine and super fine Soflex discs (treatment). Untreated surfaces served as controls. All surfaces were examined with Talysurf and the surface roughness (Ra) of each specimen was recorded. Three measurements were made of each specimen. A 4-way ANOVA and Tukey's Studentised range test were used to analyse the data. Statistically significant effects were found for both type of material (P = 0.0001) and for treatment process (P = 0.0065). Among unpolished specimens: Compoglass F is significantly rougher than Vitremer, Z100, Prodigy and Hytac Aplitip, and compomers are significantly rougher than hybrids. Among polished specimens: Photac-Fil is significantly rougher than Z100 but does not differ from Compoglass F, Vitremer, Prodigy and Hytac Aplitip, and glass ionomers are also significantly rougher than hybrids. The smoothest surface is obtained when curing materials against a Mylar strip.

Analysis of Variance↗
PubMed2001

Preprosthetic clinical crown lengthening procedures in the anterior maxilla.

Clinical crown lengthening procedures (CCLP) are used to enhance aesthetics and/or provide adequate tooth structure for placement and retention of a restoration while respecting the attachment apparatus. When restoration margins extend beyond the biologic width, inflammation and anatomic changes can develop. Anterior CCLP are indicated to increase the labial exposure of the clinical crown and/or the sound tooth structure coronal to the bone crest. Preservation of the interproximal papillae is mandatory to obtain desirable final results in the aesthetic region. This article illustrates various methods of CCLP used to achieve successful oral rehabilitation in the anterior maxilla.

Crown Lengthening↗
PubMed2001

Presentation, diagnosis and initial management of patients referred to a hospital tooth wear clinic.

Information on presenting complaints, diagnosis and initial management strategy was recorded on a proforma for 114 consecutive patients referred to a hospital tooth wear clinic over a two-year period. Over twice as many male patients were referred as females. Twenty percent of patients had no presenting complaint and the others shared the common complaints concerning appearance, sensitivity and their deteriorating dentitions. The assessment of aetiology identified attrition as the most common cause of tooth wear in the subject group studied. About half the group were prescribed preventative treatment only and the other half were deemed to require restorative dental treatment.

Adolescent↗
PubMed2001

Assessment of orthodontic treatment need in 5,112 Malaysian children using the IOTN and DAI indices.

OBJECTIVE: To assess the prevalence and severity of malocclusion in a large sample of 12-13-year-old children and to compare assessments of treatment need according to three methods. DESIGN: A random sample of 5,112 Malaysian children was drawn according to a multi-stage technique which accounted for the ethnic composition of the population. Subjects were examined using both components of the Index of Orthodontic Treatment Need (IOTN) and the Dental Aesthetic Index (DAI). RESULTS: The proportion of children in need of orthodontic treatment was 47.9% according to grades 4 and 5 of the dental health component (DHC) of IOTN and 22.8% according to grades 8-10 of the aesthetic component (AC). Using 32 points as the cut-off point for treatment acceptance, the DAI index indicated that 24.1% needed treatment. CONCLUSIONS: The IOTN index was found to be efficient and fair in identifying children who required orthodontic treatment. The best results appeared to be produced by using DHC grades 4 and 5 in association with AC photographs 6-10. This combination indicated 30% of children as being in need of treatment.

Adolescent↗
PubMedDate not supplied

Precision shade technology: contemporary strategies in shade selection.

Precise color communication is integral to the development of aesthetic harmony and overall restorative success. While traditional shade-taking procedures have enabled a degree of shade transfer, contemporary digital shade analysis devices allow standardized, repeatable shade determinations for increased accuracy. This article presents a clinical case report and contrasts two technology-based shade selection systems (SpectroShade, MHT International, Newtown, PA; ShadeScan, Cynovad, Montreal, Canada) in the retrospective verification of shade during the restoration of a maxillary right central incisor compared to conventional methods.

Adult↗