Evaluation of the fit and strength of an all-ceramic fixed partial denture.
A laboratory investigation of the fit and strength of three-unit all-ceramic FPDs was performed with a metal-ceramic FPD control. The conclusions were: 1. No difference was found between the marginal seal of the metal-ceramic and all-ceramic FPDs. 2. The all-ceramic FPDs had a more uniform cement space and their occlusal seat was significantly (99.9%) better than the metal-ceramic restorations. 3. The metal-ceramic FPDs were significantly stronger than the all-ceramic FPDs. 4. Load calculations suggest that short-span all-ceramic FPDs may be strong enough to resist normal masticatory forces for selected patients. However, generalized usage will probably result in an unacceptable failure rate.
Campbell
S D
SD
Harvard School of Dental Medicine, Boston, Mass.
Sozio
R B
RB
D000537:Aluminum Oxide; D003722:Dental Alloys; D003776:Dental Porcelain; D003779:Denture Design; D003830:Denture, Partial, Fixed; D005069:Evaluation Studies as Topic; D008422:Materials Testing; D003765:Models, Dental; D013314:Stress, Mechanical; D013499:Surface Properties
D003722:Dental Alloys; D003776:Dental Porcelain; C050798:cerestore; D000537:Aluminum Oxide