Document Detail

Clinical longevity of removable partial dentures retained by telescopic crowns: outcome of the double crown with clearance fit.
MedLine Citation:
PMID:  11484566     Owner:  NLM     Status:  MEDLINE    
PURPOSE: It was the aim of this study to investigate the long-term success of a telescopic crown system that can be used for both rigid and resilient support and to evaluate by means of a literature review whether the use of resilient support may be advantageous compared to other double crown systems when the restoration is placed on only a few remaining teeth. MATERIALS AND METHODS: Patient records were used to evaluate 125 dentures (with 460 abutment teeth) based on the Marburg double crown system. The loss of abutment teeth, endodontic treatment, and fracture of the metallic framework were investigated with regard to the different types of denture support. RESULTS: The probability that a patient would have kept all abutment teeth was 84% after 5 years and 66% after 10 years. No significant differences were found for the two groups "resilient support" (< or = three abutment teeth) and "rigid support" (> or = four abutment teeth). For abutment teeth with a double crown with clearance fit, the risk of loss was 4% after 5 years and 15% after 10 years for rigid support, and 10% and 24%, respectively, for resilient support. The risk of endodontic treatment was 7% after 5 years and 9% after 10 years for rigid support, and 3% and 7%, respectively, for resilient support. None of the denture frameworks showed a fracture during the observation period. CONCLUSION: Removable partial dentures retained by double crowns with clearance fit and constructed without major or minor connectors provide good clinical longevity. The survival rates of abutment teeth were comparable to those reported in the literature for other double crown systems. There was no significant increase of the risk of abutment loss when the restoration was placed on three or fewer remaining teeth and the concept of resilient support was applied.
H J Wenz; K Hertrampf; K M Lehmann
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  The International journal of prosthodontics     Volume:  14     ISSN:  0893-2174     ISO Abbreviation:  Int J Prosthodont     Publication Date:    2001 May-Jun
Date Detail:
Created Date:  2001-08-03     Completed Date:  2001-12-14     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  8900938     Medline TA:  Int J Prosthodont     Country:  United States    
Other Details:
Languages:  eng     Pagination:  207-13     Citation Subset:  D    
Department of Preclinical and Maxillofacial Prosthodontics, Marburg School of Dental Medicine, Philipps University, Marburg, Germany.
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MeSH Terms
Aged, 80 and over
Confidence Intervals
Dental Abutments
Dental Alloys
Dental Prosthesis Design
Dental Restoration Failure
Denture Design
Denture Retention*
Denture, Overlay*
Denture, Partial, Removable*
Follow-Up Studies
Longitudinal Studies
Middle Aged
Retrospective Studies
Risk Factors
Root Canal Therapy
Statistics as Topic
Statistics, Nonparametric
Surface Properties
Survival Analysis
Treatment Outcome
Reg. No./Substance:
0/Dental Alloys

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