Alternative method for standardized tooth preparation.
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Dental Prosthesis Design↗
Biomedical subjects
Begüm Akkayan
Publications and source records attributed to Begüm Akkayan.
Resistance to fracture of endodontically treated teeth restored with different post systems.
STATEMENT OF PROBLEM: Very little is known about the resistance to fracture of endodontically treated teeth restored with newly developed esthetic post systems. Purpose. This in vitro study compared the effect of 1 titanium and 3 esthetic post systems on the fracture resistance and fracture patterns of crowned, endodontically treated teeth. MATERIAL AND METHODS: A total of 40 recently extracted human maxillary canines with their crowns removed were endodontically treated. Four groups of 10 specimens were formed. Teeth were restored with titanium, quartz fiber, glass fiber, and zirconia posts and numbered as groups 1, 2, 3, and 4, respectively. All posts were cemented with Single Bond dental adhesive system and dual-polymerizing RelyX ARC adhesive resin cement. All teeth were restored with composite cores, and metal crowns were fabricated and cemented with glass ionomer cement. Each specimen was embedded in acrylic resin and then secured in a universal load-testing machine. A compressive load was applied at a 130-degree angle to the long axis of the tooth until fracture, at a crosshead speed of 1 mm/min. One-way analysis of variance and a Tukey test were used to determine the significance of the failure loads between groups (P<.001). A non-parametric chi(2) test was conducted for evaluation of the mode of failure (P<.001). RESULTS: The mean failure loads (kg) were 66.95, 91.20, 75.90, and 78.91 for groups 1 to 4, respectively. Teeth restored with quartz fiber posts (group 2) exhibited significantly higher resistance to fracture (P<.001) than the other 3 groups. Teeth restored with glass fiber and zirconia posts (groups 3 and 4) were statistically similar (P>.05). Fractures that would allow repair of the tooth were observed in groups 2 and 3, whereas unrestorable, catastrophic fractures were observed in groups 1 and 4 (P<.001). CONCLUSION: Within the limitations of this study, significantly higher failure loads were recorded for root canal treated teeth restored with quartz fiber posts. Fractures that would allow repeated repair were observed in teeth restored with quartz fiber and glass fiber posts.
Analysis of Variance↗
Fabrication of one-piece all-ceramic coronal post and laminate veneer restoration: a clinical report.
The procedure used for the restoration of maxillary right and left lateral incisors with all-ceramic one-piece coronal post and laminate veneer restorations is described in this clinical report. The proposed treatment technique conserves the remaining tooth structure, reestablishes function, offers satisfactory esthetics, and represents an alternative to traditional restoration procedures with the use of adhesive bonding techniques.
Acid Etching, Dental↗
Copy-milled all-ceramic restorations: case reports.
When all-ceramic systems are used, a respect for biocompatibility, an understanding of the patient's esthetic demands, and a justifiable reliance on the strength of the selected system are integral to success. Severely damaged molar teeth in two patients were restored with all-ceramic onlays that were prepared with a copy-milling system for ceramics. The onlay patterns were fabricated directly in the mouth with autopolymerizing resin. For these patients, the use of biologic, all-ceramic, copy-milled restorations resulted in clinical success as well as recovered function and esthetics.
Adult↗