Risultati clinici e istologici delle preparazioni subgengivali a lama di coltello. Casi clinici

Objectives

This article evaluates the correlation between clinical and histological results in teeth prepared for fixed prosthodontics using the Biologically Oriented Preparation Technique (BOPT).

Materials and methods

Clinical cases are presented to illustrate the main steps in the BOPT procedure and the clinical results. Six anterior teeth regarded as “hopeless” were used for histological analysis. Three were prepared according to the BOPT (test), and the other three were prepared with a rounded juxtagingival shoulder (control). Temporary acrylic resin restorations were immediately placed. The teeth were extracted after five weeks.

Results

The junctional epithelium (JE) measured 2.5 ± 0.4 mm (test) and 1.7 ± 0.3 mm (control) (p < 0.001). The area of connective tissue infiltrated by inflammatory cells was 2.7 ± 0.7 mm² (test) and 1.5 ± 0.3 mm² (control) (p < 0.001).

Conclusions

The BOPT appears to favor the formation of a long JE and inflammatory-cell infiltration of the connective tissue, so it should not be used on periodontically sound teeth.