Comparación de técnica de preparación biológicamente orientada y técnica convencional en restauraciones de Zirconio. Revisión de la literatura.

Abstract

INTRODUCTION: Preparation for a tooth prior to fixed prosthesis placement is classified into three types: horizontal finish line with rounded shoulder margin, knife-edge finish line, and vertical finish line or biologically oriented preparation technique. OBJECTIVE: Determine which dental preparation technique, based on the finishing line, is more conservative with respect to the tooth structure in zirconium restorations. MATERIALS Y METHODS: A bibliographic review was carried out with a qualitative approach of retrospective descriptive design in the search for scientific articles. They were used in the Pubmed, Google Scholar and Medline metasearch engines. A total of 400 related articles were obtained, which by inclusion and exclusion criteria were left at 35. RESULTADOS: The advantages of horizontal preparations are well-defined and visible margins with the absence of overcontouring, while in the biologically oriented preparation technique (BOPT) greater accuracy is observed in the erasure of the cementoenamel line (LAC) in unprepared teeth and elimination of previously existing finish lines on already prepared teeth. CONCLUSIÓN: Tooth preparation with the biologically oriented preparation technique prior to restoration using a fixed zirconia prosthesis is a safe treatment option that provides excellent clinical results, with increased gingival thickness and stability of the gingival margin.