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Comparative Study
. 2000 Mar-Apr;15(2):239-46.

Passivity of fit and marginal opening in screw- or cement-retained implant fixed partial denture designs

D L Guichet  1 , A A Caputo, H Choi, J A Sorensen
Affiliations
  • PMID: 10795456
Comparative Study

Passivity of fit and marginal opening in screw- or cement-retained implant fixed partial denture designs

D L Guichet et al. Int J Oral Maxillofac Implants. 2000 Mar-Apr.

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.

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