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Results for “DENTAL RESTORATION, PERMANENT”

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At least 1,369 records · Page 76Linked to original sources
PubMed1999

A review of glass ionomer restorations in the primary dentition.

Glass ionomer cements are tooth-coloured materials that bond chemically to dental hard tissues and release fluoride for a relatively long period. They have therefore been suggested as the materials of choice for the restoration of carious primary teeth. However, the clinical performance of conventional and metal-reinforced glass ionomer restorations in primary molars is disappointing. And although the handling and physical properties of the resin-modified materials are better than their predecessors, more clinical studies are required to confirm their efficacy in the restoration of primary molars.

Child↗
PubMed1999

[Marginal adaptation of different esthetic filling materials under the effect of heat treatment].

The aim of the study was to examine the marginal adaptation of six tooth coloured restoratives to the tooth hard tissues before and after heat treatment considering the filling method and the placement of the cavity margin. The study showed that 1) the composite marginal adaptation was better with enamel bonding technique than with total bonding technique; 2) the microleakage was less before heat treatment; 3) the best fit was at the occlusal surface and the worst at the gingival tooth-filling junction with the composites; 4) non-composites showed the best adaptation at the approximal enamel-filling junction and the worst at the occlusal surface; 5) the best marginal adaptation could be achieved with Charisma and SpectrumTPH among the composites, and Dyract among the non-composites.

Dental Marginal Adaptation↗
PubMed1976

Improving evaluation of amalgam restorations.

A predictive model of overall quality of performance is presented which might assist both dental students and dental faculty by increasing the reliability of clinical and laboratory evaluations. Training effectiveness can be improved by identification of those restorative skills which contribute most to the quality rating of restoration.

Dental Amalgam↗
PubMed1976

Perceptual and motor training for the acquisition and retention of psychomotor skills in dental amalgam restorations: class I in the mandibular first molar.

From a study of 72 dental students during amalgam restoration using four training methods (psychomotor, mental, psychomotor and mental, and conventional)--one method for each 18 students--the following conclusions are drawn: (1) It is economically feasible to develop and utilize self-paced instructions without the aid of instructors for the acquisition of psychomotor skills. (2) Training through self-paced analytical programs results in higher retention of the acquired skills than training through conventional training methods.

Dental Amalgam↗
PubMed1976

Skills analysis of a class I amalgam restoration in a mandibular right first molar.

1. Students changed their body position 32% more often than instructors during amalgam condensation. 2. Experienced instructors used 38% fewer strokes than students to condense the amalgam. 3. On the average, instructors used 65% less time per condensation stroke than students. This was not due to ability to move the instrument more quickly, since both students and instructors had similar minimum stroke times, but rather to the fact that instructors performed slowly less often. 4. The upstroke during condensation required nearly the same time for both students and instructors (an eight percent difference). It was the downstroke that was greatly different (a 96% difference). 5. Instructors repeated condensation strokes 22% more often than students, working more systematically with less "jumping around" in the cavity. 6. The total number of carving strokes was not related to experience. 7. Students repeated carving strokes more often than instructors. 8. Students and instructors tended to use the same length of strokes in carving. 9. There was a noticeable difference between instructors and students in the method used to grasp the instruments.

Dental Amalgam↗
PubMed1998

Baby boomers make cosmetic dentistry boom.

Baby Boomers want to stay younger longer. As they age, a healthy attractive smile becomes much more important to their appearance. Nothing conveys good health and maintenance like aesthetically pleasing teeth. Because the timing is perfect for cosmetic dentistry, there is no reason for people to not have a great smile. Smile-Vision and the latest cosmetic dentistry techniques and materials helped the case patient first see and then become the person he wanted to be. His teeth look and feel better, resulting in a more confident appearance. (Figures 14 through 16).

Adult↗
PubMed1999

Reasons for the placement and replacement of restorations in vocational training practices.

AIM: The reasons for placement and replacement of restorations are central to clinical practice. It is the purpose of this paper to assess the reasons for placement and replacement of restorations in the practices of vocational dental practitioners (VDPs) and their trainers. METHOD: VDPs and their trainers were invited to take part in the study. VDPs were asked to record the principal reason for the placement or replacement of all restorations which they provided for a one-month period and, also, to record the age, Class and materials used for each restoration replaced (if known). Trainers were also asked to participate. The data thereby collected were analysed statistically. RESULTS: 56 VDPs and 17 trainers participated. Data were obtained on a total of 9031 restorations, 4423 (49%) being initial placements and 4608 (51%) replacements. Of the total number of restorations assessed, 54% were amalgam, 30% composite and 16% glass ionomer. Principal reasons for placement/replacement of the restorations were primary caries (41%), secondary caries (22%), tooth fracture (6%), margin fracture/degradation (6%), non-carious defects (6%) and bulk fracture (5%). The type of existing restorative material was recorded for 4196 restorations: secondary caries was the most common reason for the replacement of restorations--for 46.0%, 39.6% and 39.8% of amalgam, composite and glass-ionomer restorations respectively. VDPs placed more restorations as a consequence of caries than their trainers. CONCLUSION: Primary caries is the most common reason for the placement of restorations by the participating dentists, and secondary caries is the most common reason for the replacement of restorations of amalgam, composite and glass ionomer. VDPs placed more restorations as a consequence of caries than their trainers.

Dental Caries↗
PubMed1999

Evaluation of esthetic parameters of resin-modified glass-ionomer materials and a polyacid-modified resin composite in Class V cervical lesions.

OBJECTIVE: The purpose of this study was to compare the esthetics of 3 resin-modified glass-ionomer materials and 1 polyacid-modified resin composite to the esthetics of a conventional glass-ionomer control material. METHOD AND MATERIALS: One hundred eighty-seven Class V cervical restorations were observed clinically over 18 months. The esthetic index system that was used evaluated color match, translucency or opacity, and surface roughness. RESULTS: The tested materials behaved very dissimilarly and inconsistently. In general, the esthetic results of the resin-modified glass-ionomer materials and the polyacid-modified resin composite were far from optimal. The esthetic appearance of restorations seriously deteriorated during clinical service, mainly because of discoloration of margins, changes in translucency and opacity, and rapidly appearing roughness or dullness on the surface. Both the resin-modified glass-ionomer materials and the polyacid-modified resin composite evaluated in this study performed better esthetically than did the conventional glass-ionomer material. CONCLUSION: Indications for these combination materials are limited to areas where esthetics is not a primary concern but where their ease of application may guarantee a more durable functional result.

Acrylic Resins↗