Photoelastic Stress Analysis for Cobalt Chromium and Nylon Denture Base on Mandibular Kennedy Class I Implant Supported Removable Partial Overdenture | ||
| Al-Azhar Journal of Dental Science | ||
| Article 1, Volume 25, Issue 2, April 2022, Pages 119-125 PDF (843.38 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ajdsm.2020.52395.1142 | ||
| Authors | ||
| Abdelrahman Adel Hasan wafa Hasan* 1; Hafez Ibrahim Bahnassawi2; Yasser Abd‏ ‏Elghaney Baraka3 | ||
| 1Department of Removable Prosthodontics, Faculty of dentistry, Sinai university, El Arish city, North Sinai, Egypt | ||
| 2Removable Prosthodontics department Faculty of Dental Medicine, Boys, Al-Azhar University, Cairo, Egypt | ||
| 3Removable Prosthodontics department, Faculty of Dentistry, Sinai University, sinai, Egypt | ||
| Abstract | ||
| Objective: the object of this study was to evaluate stresses induced on implant supported cobalt chromium and nylon overdenture bases in free end saddles cases using photoelastic stress analysis. Materials and Methods: Ready-made mandibular stone cast fabricated according to Kennedy Class I with missed 2nd premolar, 1st and 2nd molars. Implant analogue was inserted at site of first molar by using milling machine. Closed tray silicone impression was taken to the stone cast after transfer coping insertion. The transfer coping was inserted on its place in the impression. The implant was placed on its position in the impression. The impression was poured by epoxy resin material and left 24 hour for complete setting. Metallic denture base and nylon denture base was constructed in same design. Forces of 20N, 40N, 60N, 80N, 100N were applied to detect photoelastic stresses. Results: at application of loads (80N and 100N) the nylon framework recorded higher stress values than that of vitalium framework at apical, middle and cervical area for left and right sides. Conclusion: Cobalt chromium denture base showed better stresses distribution in comparison to nylon denture base. | ||
| Keywords | ||
| Cobalt chromium; stress distribution; nylon overdenture base; flexible denture; Photoelstic analysis. | ||
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