Abstract
Objectives. The aim of this study was to analyze the behavior of the periodontal tissues around teeth in the anterior region when restored with zirconia single crowns, using a biologically oriented preparation technique (BOPT), over a 6-year follow-up. Methods. The study investigated tooth-supported single crowns in the anterior region that were fabricated with a zirconia core and feldspathic ceramic covering, in 34 patients. Follow-up analysis took place annually for 6 years, assessing periodontal responses by evaluating the following variables: plaque index (PI); probing depth (PD); gingival index (GI); gingival thickness adjacent to the restoration; and stability of the gingival margin (MS). Any (biological and mechanical) complications were also recorded, as well as the patients’ satisfaction with the treatment. Results. After 6 years’ follow-up, a low mean plaque index was obtained, probing depth was stable, and gingival thickness and margin stability had increased. Complications (biological and mechanical) did not present a statistically significant incidence and a crown survival rate of 97.2% was achieved. Patients’ satisfaction obtained a mean VAS score of 9.04 under 10. Conclusion. Teeth that are prepared with BOPT in the anterior region present good periodontal behavior around the restored teeth, particularly in terms of the stability of the gingival margin and increased gingival thickness. Single crowns prepared with BOPT obtain an excellent clinical survival rate, as well as a high score in patients’ satisfaction after 6 years.
Highlights
Prosthetic dental treatments should not limit their objectives to achieving the optimal restoration of function and esthetics but should include biological responses
The present study evaluated the clinical behavior of tooth-supported single crowns on teeth prepared with biologically oriented preparation technique (BOPT) in the anterior region, with a 6-year follow-up
Treatment with single zirconia crowns on teeth prepared with BOPT obtained an accumulated survival rate of 97.2%
Summary
Prosthetic dental treatments should not limit their objectives to achieving the optimal restoration of function and esthetics but should include biological responses. In this sense, an ideal prosthodontic treatment must achieve a healthy relationship between the prosthesis and the surrounding periodontal tissues [1,2,3,4,5]. As for vertical finish lines, the best known is the knife-edge finish line. Another approach to vertical preparation is the biologically oriented preparation technique (BOPT) first introduced by
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