Comparison of implant versus tooth-supported zirconia-based single crowns in a split-mouth design: a 4-year clinical follow-up study
Abstract
Objectives
This
study aims to evaluate the 4-year clinical performance of tooth versus
implant-supported single-unit zirconia crowns (LAVA™) placed on
posterior region.
Materials and methods
Twenty-four
patients (10 men and 14 women) who had received 48 single crowns (24
implant-supported and 24 tooth-supported) from January 2007 to December
2009, were included. California Dental Association (CDA) quality
assessment system, plaque and gingival index scores were used to
evaluate the performance of the crowns at baseline and at all follow-up
examinations.
Results
During
the follow-up period, no fracture of zirconia coping has occurred.
Major complication was chipping in three patients that required a new
crown fabrication. Except for the failure ones, all crowns in both
groups were rated as satisfactory at the follow-up examinations based on
the CDA quality assessment criteria. There were no statistically
significant differences between tooth and implant-supported crowns in
terms of periodontal parameters.
Conclusions
The
present 4-year follow-up clinical study demonstrates that single-unit
tooth- and implant-supported zirconia crowns have similar prosthetic and
periodontal outcomes.
Clinical relevance
Single-unit
implant or tooth-supported zirconia crowns may be considered acceptable
treatment modalities for restoration of either missing or compromised
posterior teeth
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