Comparison Between the Biologically Oriented Preparation Technique (BOPT) and the Horizontal Preparation Technique. About a Case
Echegaray Yankova Daniel*
Faculty of Health and Sport Sciences of Huesca, University of Zaragoza, Huesca, Aragón
*Corresponding Author: Echegaray Yankova Daniel, Faculty of Health and Sport Sciences of Huesca, University of Zaragoza, Huesca, Aragón.
Received: May 08, 2021; Published: January 21, 2022
Introduction: One of the main complications in dental supported fixed prosthesis (PFD) is the unsatisfactory aesthetic result due to the apical migration of the gingival margin. The tendency of the gingival margin to migrate apically over time is related to different factors (gingival biotype, prosthetic preparation, invasion of biological space, iatrogeny, etc.). Within them, one is particularly relevant, the preparation technique and the corresponding geometry of the termination line. The placement and design of the finishing line for dental preparation has always been a topic of controversy in the literature. The debate is whether horizontal preparation is superior to vertical preparation and vice versa in terms of ease of manufacture, tissue stability and long-term survival, among others.
The biologically oriented preparation technique, or BOPT (Biologically Oriented Preparation Technique), arises as a preparation technique in which periodontics and prostheses will work together. What is intended with this technique is to guide the tissues periodontally through prosthetic rehabilitation in order to eliminate or minimize the apical migration of the gingival margin.
Objectives: To promote the BOPT technique with a horizontal termination line preparation technique (juxta gingival driver) through the realization of two PFDs, evaluating the clinical and biological aspects at one year of follow-up.
Material and Methods: A 48-year-old patient comes to the clinic whose reason for consultation is to replace the absence of the upper second premolars. Given the refusal to implants, the treatment plan offered is the realization of two PFDs. For the replacement of the 1.5 a BOPT carving is made, while for the replacement of the 2.5 a juxta gingival driver is made.
Results: In the case of the BOPT technique, better tissue stability and increased gingival thickness are observed. In the case of the conventional technique, a slight apical migration of the gingival margin is observed in two locations, in addition to bleeding at probing in four of twelve locations.
Conclusion: Different designs of finishing lines have been indicated in dental preparations for different reasons, but it is unclear which type of termination line, if any, offers the greatest advantages. Apparently the BOPT technique is the one that obtains the best results. However, to give greater scientific value to the technique, more clinical and biological studies are needed.
Keywords: Prosthetic Termination Line; Recession; BOPT Technique; Vertical Preparation Technique; Chámfer; Fixed Prosthesis
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