Abstract | PURPOSE: The aim of this study was to prospectively analyze the effect that the incorporation of osseointegrated implant dentistry had on the outcome of metal-ceramic tooth-supported prostheses that had been in situ for 5 to 10 years. MATERIALS AND METHODS: The 10-year estimated (Kaplan-Meier) cumulative survival of metal-ceramic tooth-supported single crowns (TSCs) and metal-ceramic tooth-supported fixed dental prostheses (TFDPs) provided for all patients treated at two time periods was determined and statistically compared (log-rank test). Prostheses in group 1 (404 TSCs and 433 TFDP abutments in 189 TFDPs) were cemented between January 1989 and December 1993, with the outcome determined in 1998. Prostheses in group 2 (539 TSCs and 354 TFDP abutments in 142 TFDPs) were cemented between January 1997 and December 2001, with the outcome determined in 2006. A 500% increase in implants restored occurred between the end of group 1 and group 2 time periods. RESULTS: For TSCs, comparison between groups showed a significantly better survival in group 2 than in group 1 for nonvital TSCs (P = .001), nonvital maxillary anterior teeth (P = .003), nonvital maxillary lateral incisors (P = .008), and nonvital premolars (P = .013). Comparison within groups showed nonvital TSCs had a significantly decreased survival compared to vital TSCs in group 1 (P < .001), but not in group 2 (P = .48). Overall, the estimated cumulative 10-year survival of TSCs in group 2 was 94% +/- 3%. For TFDPs, comparison between groups showed a significantly better survival for nonvital abutments in group 2 than in group 1 (P = .049). Comparison within groups showed nonvital TFDP abutments had a significantly decreased survival compared to vital TFDP abutments in group 1 (P = .001), but not in group 2 (P = .377). Overall, group 2's estimated cumulative 10-year survival for all TFDPs was 90% +/- 6% and for three-unit TFDPs was 97% +/- 2%. Teeth in group 2 failed less through fracture and periodontal disease than those in group 1. CONCLUSIONS: The incorporation of osseointegrated implant dentistry has resulted in a significant improvement in the survival of TSCs and TFDP abutments, nonvital and vital teeth having equivalent survivals for TSCs and TFDPs, and a decrease in supporting-tooth failure through fracture and periodontal disease.
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Authors | Terry R Walton |
Journal | The International journal of prosthodontics
(Int J Prosthodont)
2009 May-Jun
Vol. 22
Issue 3
Pg. 260-7
ISSN: 0893-2174 [Print] United States |
PMID | 19548408
(Publication Type: Comparative Study, Journal Article)
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Chemical References |
- Dental Implants
- Metal Ceramic Alloys
- Dental Porcelain
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Topics |
- Adolescent
- Adult
- Aged
- Bicuspid
(pathology)
- Cementation
- Crowns
- Dental Abutments
- Dental Implants
- Dental Porcelain
- Dental Prosthesis Design
- Dental Prosthesis, Implant-Supported
- Dental Restoration Failure
- Denture Design
- Denture, Partial, Fixed
- Female
- Follow-Up Studies
- Humans
- Incisor
(pathology)
- Male
- Metal Ceramic Alloys
- Middle Aged
- Osseointegration
(physiology)
- Prospective Studies
- Survival Analysis
- Tooth, Nonvital
(therapy)
- Treatment Outcome
- Young Adult
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