Effect of bonded amalgam on the fracture resistance of teeth

Eakle, W. Stephan; Staninec, Michal; Lacy, Alton M.

doi:10.1016/0022-3913(92)90325-5

Cited by 86 publications

(45 citation statements)

References 9 publications

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“…Adhesive restorations could partially or completely restore reduced fracture resistance. 13,23 Based on the findings of this study, improved fracture resistance with similar values to the positive control group was observed with beveled direct or indirect restorations; these groups had statistically higher values than sound teeth.…”

supporting

confidence: 55%

Fracture Resistance and Gap Formation of MOD Restorations: Influence of Restorative Technique, Bevel Preparation and Water Storage

Coelho-de-Souza¹,

Camacho²,

Demarco³

et al. 2008

Operative Dentistry

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©Operative Dentistry, 2008, 33-1, 37-43 SUMMARYThis in vitro study evaluated the effect of technique, use of a bevel and thermal cycling on the fracture resistance and gap formation of resin composite MOD restorations. Fracture resistance was measured on standard MOD cavities prepared in 100 upper premolars that were stored for 24 hours and 6 months with 1000 thermal cycles. Subgroups (n=10) were: beveled or nonbeveled preparations and direct restorations (Adper Single Bond/Filtek Z250) and indirect restorations (prepolymerized Filtek Z250 cemented with Rely X ARC). Ten sound teeth and 10 specimens with MOD preparations without restorations served as the positive and negative controls, respectively. The specimens were subjected to axial compression in a universal testing machine at a crosshead speed of 0.5 mm/minute. Failure patterns were analyzed by stereomicroscopy (40x). To evaluate gap presence or absence, proximal box cavities were prepared in 24 human third molars that were restored as described above. The specimens were evaluated under SEM examination after 24 hours and six months. Data were statistically analyzed by ANOVA and multiple comparison tests at the 0.05 level of significance. After 24 hours, the beveled restorations exhibited higher fracture strength values than the non-beveled restorations, and all groups FH Coelho-de-Souza • GB Camacho FF Demarco • JM Powers Clinical RelevanceBeveling of the cavosurface margin can improve resistance to fracture and the marginal adaptation of posterior composite restorations, reducing the deleterious effect of storage with thermal cycling on restoration quality. Generally, indirect restorations showed similar performance compared to direct restorations.

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supporting

confidence: 55%

Fracture Resistance and Gap Formation of MOD Restorations: Influence of Restorative Technique, Bevel Preparation and Water Storage

Coelho-de-Souza¹,

Camacho²,

Demarco³

et al. 2008

Operative Dentistry

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“…The most important factor that influences the failure of restorations is the size of the cavity preparation, instead of the nature of the ceramic system (Hickel & Manhart, 2001). More conservative inlay preparations should be preferred in relation to other indirect preparations (Edelhoff & Sorensen, 2002) and should not be replaced by restorations that promote additional occlusal reduction (Eakle, Staninec & Lacy, 1992;Krejci & others, 2003).…”

Section: Discussionmentioning

confidence: 99%

Fracture Resistance of Premolars Restored with Partial Ceramic Restorations and Submitted to Two Different Loading Stresses

Habekost

Camacho

Pinto

et al. 2006

Operative Dentistry

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The fracture resistance of ceramic restorations is associated with the quantity of the dental structure removed. In relation to the fracture resistance, preference should be given to inlay restorations rather than to onlays; however, no restorative technique was able to attain the fracture resistance of intact teeth. SUMMARYThis in vitro study evaluated the fracture resistance of teeth restored with different designs of partial ceramic restorations using two diameters of steel ball to apply fracture stresses. One hundred and twenty sound maxillary premolars were randomly divided into three groups of 40 elements; each group was submitted to one of three indirect restoration designs: inlay, onlay with only lingual cuspal coverage and onlay with buccal and palatal cuspal coverage. Another 20 intact teeth were randomly assigned as control groups. The restorations were produced with Super Porcelain EX-3 and Vitadur Alpha ceramics and luted according to manufacturers' instructions. The specimens were subjected to compressive axial loading in a universal testing machine at 0.5 mm/minute using two steel balls (3 and 10 mm in diameter), evaluating a total of 14 groups with 10 specimens each. Peak load to fracture was measured for each specimen. The results were submitted to analysis of variance and Tukey's test. Statistical analysis revealed that the inlays showed a significantly higher fracture resistance than both onlay designs, but with fracture resistance lower than that of intact teeth. Onlay fracture strength was equivalent for both designs. The force required to cause fracture with the 10-mm diameter ball was greater than with the 3-mm diameter ball. There were no differences between the tested ceramics.

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“…In addition, a bonded restoration has been shown to increase the fracture resistance of the tooth and render it more able to resist fl exural forces. 23 In the case of teeth exhibiting fractured cusp syndrome, this property can be harnessed to great effect to alleviate or eliminate its symptoms. 24,25 Much of the clinical research on amalgam restorations has been conducted in the university or dental hospital setting.…”

Section: Researchmentioning

confidence: 99%

Longevity of conventional and bonded (sealed) amalgam restorations in a private general dental practice

Bonsor¹,

Chadwick

2009

Br Dent J

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Effect of bonded amalgam on the fracture resistance of teeth

Cited by 86 publications

References 9 publications

Fracture Resistance and Gap Formation of MOD Restorations: Influence of Restorative Technique, Bevel Preparation and Water Storage

Fracture Resistance and Gap Formation of MOD Restorations: Influence of Restorative Technique, Bevel Preparation and Water Storage

Fracture Resistance of Premolars Restored with Partial Ceramic Restorations and Submitted to Two Different Loading Stresses

Longevity of conventional and bonded (sealed) amalgam restorations in a private general dental practice

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