Rosentritt, Martin and Strasse, Thomas and Beh, Michael and Schmid, Alois (2021) In vitro performance of CAD/CAM and conventional removable dentures. INTERNATIONAL JOURNAL OF COMPUTERIZED DENTISTRY, 24 (4). pp. 385-392. ISSN 1463-4201,
Full text not available from this repository. (Request a copy)Abstract
Aim: Innovations in CAD/CAM technology and materials science offer new methodologies for removable prosthodontics. As clinical data are still rare, in vitro performance of both CAD/CAM and comparable conventional materials may help to estimate the clinical outcome. Materials and methods: Specimens (n = 8 per group) from teeth (CediTEC, SR VivodentCAD, Vitapan), base materials (V-Print dentbase, IvoBase CAD, Paladur), adhesives (CediTEC Primer/Adhesive, IvoBase CAD Bond), and a fully printed specimen (Try-In) were created. All specimens underwent thermal cycling and mechanical loading (TCML): 1,200,000 x 50 N; 2x3000 x 5 degrees C/55 degrees C; H2O. Surviving specimens were loaded to fracture. Statistical tests used were the Shapiro-Wilk test and the Kaplan-Meier survival, with the level of significance set to alpha = 0.05. Results: Mean loading cycles until failure varied between 100 and 621,667 cycles. Up to five specimens per group failed during TCML. With one exception, all specimens of the entirely CAD/CAM-fabricated group survived TCML. The log-rank (Mantel-Cox) test showed significantly different (P = 0.000) loading cycles between the systems (chi-square test: 28,247; degree of freedom: 8). Failure of the dentures during TCML was characterized by failure of the denture base (2x), denture tooth (13x), mixed base/tooth (3x) or adhesive between base and tooth (1x). Conclusion: TCML and fracture testing showed different aspects of denture tooth restoration. The results indicated no correlation between fracture force, fracture pattern, and survival cycles. Denture teeth (milled, heat-pressed), bases (milled, printed, pressed), and primer should be matched up to optimize the performance of dentures.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | MONOMER; TEETH; RESIN; STRENGTH; CAD; CAM; rapid prototyping; 3D printing; dentures; TCML; FEA; milling |
| Subjects: | 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Zahnärztliche Prothetik |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 24 Aug 2022 13:46 |
| Last Modified: | 24 Aug 2022 13:46 |
| URI: | https://pred.uni-regensburg.de/id/eprint/46372 |
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