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- Title
Passivity of Fit and Marginal Opening in Screw- or Cement-Retained Implant Fixed Partial Denture Designs.
- Authors
Guichet, David L.; Caputo, Angelo A.; Hyeonju Choi; Sorensen, John A.
- Abstract
The relationship of stress generation upon placement of cement-retained or screw-retained implant restorations has not been thoroughly investigated. Passivity of fit and marginal discrepancies of screw- and cement-retained implant fixed partial denture (FPD) designs were determined using a photoelastic model of a partially edentulous posterior mandibular arch with 3 screw-type implants. Buccal and lingual marginal openings, measured with a traveling microscope before cementation or screw tightening, revealed no statistical difference in adaptation between designs. Screw tightening caused a reduction in marginal opening (changes significant, P < .05). The opening with the cemented FPDs was similar before and after cementation. Photoelastic evaluation of the FPDs showed that cement-retained FPDs exhibited a more equitable stress distribution than did their screw-retained counterparts.
- Publication
International Journal of Oral & Maxillofacial Implants, 2000, Vol 15, Issue 2, p239
- ISSN
0882-2786
- Publication type
Academic Journal