Availability and use of dental wedges.
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Dental Instruments↗
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Results for “Matrix Bands”
Search indexed PubMed citations on genomics, clinical trials, systematic reviews and public health. Explore titles, authors and supplied subject terms, then open the PubMed record.
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The atomic matrix in Class II and mod silver amalgam restorations.
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Dental Amalgam↗
Interproximal integrity of posterior partial-coverage ceramic restorations: sequence of delivery and finishing.
The conservative, nonretentive cavity design of partial-coverage ceramic restorations provides a number of distinct advantages over traditional cast-metal options. However, unique challenges are associated with precise delivery of the restoration and the cleanup of excess luting resin. Restorative success and long-term gingival health are dependent on interproximal integrity at the restoration-tooth interface. This article examines the variables that affect this integrity and introduces a number of innovative techniques that assure meticulous delivery of posterior partial-coverage ceramic restorations.
Acid Etching, Dental↗
Controlling contacts and contours using preformed ceramic inserts.
Current adhesive techniques and materials that seal both enamel and dentin have revolutionized modern restorative dentistry. Unfortunately, the durability problems associated with direct polymeric materials of the past have not been adequately solved. Nevertheless, when cost and esthetics form part of the treatment decision process, patients presenting with Class 2 defects are most often provided with a direct restorative option. Direct composite resin restorations are fraught with problems largely related to the mechanical stresses that accompany polymerization shrinkage. A partial solution is to incorporate prefabricated ceramic inserts into the substance of the composite resin, thereby decreasing the volume of directly cured restorative material and effectively reducing the magnitude of the polymerization stresses. SONICSYS approx is a unique addition to the restorative continuum that takes the insert strategy one step further by using specifically shaped sonically driven diamond-coated preparation tips to adjust the cavity form to fit presized ceramic proximal inlays. The SONICSYS approx system represents a technique intermediate between a direct resin composite and a laboratory fabricated inlay. This article describes the background of this development, and the components and application of the system. In addition, within the presentation of a case study, operative innovations are introduced that improve interfacial integrity and allow for the conveyance of predictable contacts and proper physiological contour.
Adhesives↗
Custom provisional restorations: simple, fast and accurate.
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Bisphenol A-Glycidyl Methacrylate↗
The axial bevel technique: a new technique for extensive posterior resin composite restorations.
The objective of this article is to introduce a new preparation design that utilizes external axial bevels and a resin placement technique that involves selective application of 2 resins of different viscosity to optimize marginal integrity in large Class II restorations. The rationale behind the intricate application of material and procedural manipulations involved in the delivery of these complicated restorations is discussed.
Acid Etching, Dental↗
Creating tight, anatomically correct interproximal contacts.
Achievement of an excellent contact, one that provides a natural look and feel, reproducing the natural tooth contact or sometimes improving it, can be achieved in many ways. Understanding the separate issues of tightness and anatomy is crucial to achieving the desired result. In most cases, use of a contoured sectional matrix and McKean-style ring is the surest way to achieve the desired result. Unusual circumstances, such as wide preparations and malpositioned teeth, call for innovative techniques, some of which are illustrated in this article.
Dental Cavity Preparation↗
Comparative study of composite resin placement: centripetal buildup versus incremental technique.
An in vitro study was performed to evaluate the effect of two different proximal restoration techniques with different matrix systems on the marginal seal and microhardness of Class II composite restorations. Results indicated that the lowest, however, not significantly different, microleakage was achieved in totally bonded deep Class II restorations prepared with margins surrounded by enamel when using transparent matrices and reflective wedges in combination with the centripetal buildup technique. Highest surface hardness of composite resin was related to transparent matrices and reflecting wedges.
Coloring Agents↗
[Point of contact and cervical-proximal margin of occlusal-proximal restorations using amalgam. A clinical evaluation].
The occluso-proximal restorations should restore a coronary morphology permitting a normal physiology. The radiological evaluation of 55 occluso-proximal restorations with the amalgam done by 4th and 5th years students at the Odonto-Stomatology Institute, and judged clinically acceptable, has shown 63,63% of incorrect restorations with faults: of inter-dental contact (absence of contact or large contact area) and of cervico-proximal limit (hiatus or excess. The identified iatrogenic faults come from choice of matrixing material in accordance with the clinical situation, to use of separators or inter-dental wedges. The radiographic control of these restorations has permit an immediate correction of excesses and some big areas of contacts, by improving appreciably the success score (up to 20% without re-doing the obstrusion with the amalgam). The retro-alveolar radiography is a clinical evaluation instrument for a better periodontal integration of occlusoproximal restorations in the biological space and inter-proximal space.
Bicuspid↗
Multiple uses for vinylpolysiloxane bite registration material.
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Composite Resins↗
The use of glass ionomer materials in pediatric dentistry.
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Child↗
Custom matrix adaptation with elastic cords.
Proper placement of the matrix and wedge is critical to the success of proximal amalgam and posterior resin composite restorations. This paper has presented an easy technique for adaptation of the matrix in cases where the gingival cavosurface margin involves a concavity. Special case considerations were also discussed.
Composite Resins↗
Influence of rubber-dam on the reconstruction of proximal contacts with adhesive tooth-colored restorations.
PURPOSE: To clinically measure the influence of rubber-dam on the proximal contact strength after its reconstruction with tooth-colored restorations. MATERIALS AND METHODS: The frictional forces during the removal of a metal strip from the proximal contact area were taken as measure for the proximal contact strengths of 46 restorations (35 ceramic inlays, 11 direct composite restorations). The teeth were separated with a rubber-dam and wedged thoroughly during the complete reconstruction procedure according to the multiple wedging technique. The proximal contact strengths were measured immediately before and immediately after removing the rubber-dam. RESULTS: The contact strengths were statistically significantly lower immediately after the removal of the rubber-dam (1.07+/-0.82N) compared to the situation with the rubber-dam (1.99+/-1.21N). The amount of the reduction after removing the rubber-dam was statistically significantly higher between the second premolar and the first molar (1.45+/-1.06N) compared to the contacts between the canines and the first premolar (0.32+/-0.44N) and the first and second premolar (0.59+/-0.77N). No influence of the restorative material, the use and localization of retainers, localization of the restoration, or number of teeth under the rubber-dam was detectable. CONCLUSION: Rubber-dam is recommended for adhesive restorations as it is helpful for achieving good adhesion between the tooth and restorative materials. Nevertheless, the application of rubber-dam seems to be a factor which complicates the reconstruction of adequate proximal contacts.
Analysis of Variance↗
Effects of a refrigerated amalgam bonding system on fracture resistance.
This in vitro study evaluated the effectiveness of using an amalgam bonding system at refrigerated temperature to regain fracture resistance in molars with large mesial-occlusal-distal restorations. Nineteen pairs of homologous contralateral pairs of third molars were used, with control teeth remaining intact. Although the bonded amalgam group developed 81% of the fracture strength values of the intact teeth, the intact teeth were found to have significantly higher fracture strength values (p = 0.0326, paired t-test).
Dental Amalgam↗
Sterilising Siqveland.
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Equipment Design↗
Two-year clinical evaluation of four polyacid-modified resin composites and a resin-modified glass-ionomer cement in Class V lesions.
OBJECTIVE: The aim of the study was to compare the clinical performances of four polyacid-modified resin composites (F2000, Dyract AP, Compoglass F, and Elan) and one resin-modified glass-ionomer cement (Vitremer) in Class V abrasion/erosion lesions. METHOD AND MATERIALS: Twenty restorations of each of the five restorative materials were placed in noncarious cervical abrasion/erosion lesions by one dentist. No cavity preparation was attempted. All teeth were isolated with cotton rolls and gingival retraction cord. The materials were manipulated according to the manufacturer's instructions and placed with the help of cervical matrixes. Restorations were finished and polished immediately after the placement. Evaluations were performed at baseline and 6 months, 1 year, and 2 years after placement for retention, color match, cavo-surface marginal discoloration, anatomic form, marginal adaptation, secondary caries, and postoperative sensitivity. RESULTS: Retention levels at 2 years were 90% for F2000, 90% for Dyract AP, 89% for Compoglass F, 84% for Elan, and 95% for the Vitremer restorations. No statistically significant differences were found among the materials after 2 years for any evaluation category. CONCLUSION: Polyacid-modified resin composite and resin-modified glass-ionomer cement restorations showed acceptable clinical performance after 2 years.
Adult↗