Acta Scientific Dental Sciences (ASDS)(ISSN: 2581-4893)

Case Report Volume 6 Issue 2

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


  1. Loi I and Di Felice A. “Biologically oriented preparation technique (BOPT): a new approach for prosthetic restoration of periodontically healthy teeth”. The International Journal of Esthetic Dentistry 1 (2013): 10-23.
  2. Loi I., et al. “Biologically oriented preparation technique (BOPT). A new approach in prosthetic preparation in dentistry”. International Quintessence 5 (2008): 69-75.
  3. Bazzoli M., et al. “The management of gum parabolas with B.O.P.T. technique approach with cad-cam”. Teamwork Media5 (2013): 42-53.
  4. Agustín-Panadero R and Solá-Ruíz MF. “Vertical preparation for fixed prosthesis rehabilitation in the anterior sector”. Journal of Prosthetic Dentistry 4 (2015): 474-478.
  5. Viviani A., et al. “Description of the BOPT (Biological Oriented Preparation Technique)”. Dental Gazette 298 (2018): 134-147.
  6. Loi I., et al. “The prosthetic coronal contour with biologically oriented preparation technique (BOPT): technical considerations”. Quintessence International 25 (2009): 4-19.
  7. Agustín-Panadero., et al. “Fixed dental prostheses with vertical tooth preparations without finish lines: A report of two patients”. The Journal of Prosthetic Dentistry5 (2016): 520-526.
  8. Agustín-Panadero R., et al. “Prospective Clinical Study of Zirconia Full-coverage Restorations on Teeth Prepared with Biologically Oriented Preparation Technique on Gingival Health: Results After Two-year Follow-up”. Operative Dentistry 5 (2018): 482-487.
  9. CWC Oaks. “B.O.P.T. Biologically Oriented Preparation Technique” (2017).
  10. Castorani C., et al. “Correction of gingival parables with biologically oriented preparation technique”. Dental Cadmos6 (2015): 425-434.
  11. Loi I., et al. “The influence of dental preparation on the gingival margin. Management of periodonto with biologically oriented technique (BOPT) in a case of deep dental fractures”. Clinical Periodontics12 (2019): 37-46.
  12. Scutellà F., et al. “A Retrospective Periodontal Assessment of 137 Teeth After Featheredge Preparation and Gingittage”. International Journal of Periodontics and Restorative Dentistry 6 (2017): 791-800.
  13. Baker RA and López CC. “Clinical-prosthetic protocol of the BOPT technique. Barcelona: European Specialized Editions (2016).
  14. Kuwata M. “Gingival margin design of abutments for ceramometal restorations. 2”. Quintessence of Dental Technology 10 (1979): 27-38.
  15. Magallanes R., et al. “The Shoulderless Approach a New Rationale in Prosthetic Dentistry”. Tomorrow Tooth Journal 1 (2017): 1-29.
  16. Castorani C., et al. “Valutazione clinica della risposta dei tessuti gengivali alla tecnica BOPT”. Il Dentista Moderno 10 (2017): 58-66.
  17. Pettinicchio M., et al. “Clinical and histological outcomes of subgingival knife-edge tooth preparation”. Case Reports. Dental Cadmos7 (2011): 420-429.
  18. Paniz G., et al. “Periodontal response to two different subgingival restorative margin designs: a 12-month randomized clinical trial”. Clinical Oral Investigations6 (2016): 1243-1252.
  19. Paniz G., et al. “Clinical periodontal response to anterior all-ceramic crowns with either chamfer or feather edge subgingival tooth preparations: six-month results and patient perception”. International Journal of Periodontics and Restorative Dentistry 37 (2017): 61-68.
  20. Pelaez J., et al. “A four-year prospective clinical evaluation of zirconia and metal-ceramic posterior fixed dental prostheses”. International Journal of Prosthodontics 25 (2012): 451-458.
  21. Moretti LA., et al. “The influence of restorations and prosthetic crowns finishing lines on inflammatory levels after non-surgical periodontal therapy”. The Journal of International Academy of Periodontology 3 (2011): 65-72.
  22. Ozcan M., et al. “Influence of cervical finish line type on the marginal adaptation of zirconia ceramic crowns”. Operative Dentistry 34 (5 (2009): 586-592.
  23. Orkin DA., et al. “The relationship of the position of crown margins to gingival health”. Journal of Prosthetic Dentistry4 (1987): 421-425.
  24. Silness J. “Periodontal conditions in patients treated with dental bridges. 3. The relationship between the location of the crown margin and the periodontal condition”. Journal of Periodontal Research 5 (1970): 225-229.
  25. Richter WA and Ueno H. “Relationship of crown margin placement to gingival inflammation”. Journal of Prosthetic Dentistry 30 (2 (1973): 156-161.
  26. Serra-Pastor B., et al. “Periodontal and prosthetic outcomes on teeth prepared with biologically oriented preparation technique: a 4-year follow-up prospective clinical study”. Journal of Periodontal Research 4 (2019).
  27. Patroni S., et al. “CAD/CAM technology and zirconium oxide with feather-edge marginal preparation”. The European Journal of Esthetic Dentistry 5 (2010): 78-100.
  28. Poggio CE., et al. “A retrospective analysis of 102 zirconia single crowns with knife-edge margins”. Journal of Prosthetic Dentistry 107 (2012): 316-321.
  29. Schmitz JH., et al. “Monolithic lithium disilicate complete single crowns with feather-edge preparation design in the posterior region: a multicentric retrospective study up to 12 years”. Quintessence International 20 (2017): 601-608.
  30. Tacchini L and Bazzoli M. “Class V conservative restorations according to the principles of BOPT technique: the tissue responses. Case report with a 40-month follow-up”. Il Dentista Moderno 11 (2017): 62-70.
  31. Agustín-Panadero R., et al. “Dental-gingival remodelling with BOPT no-prep veneers”. Journal of Clinical and Experimental Dentistry 12 (2017): 1496-1500.
  32. Tanner J., et al. “Zirconia single crowns and multiple-unit FDPs-an up to 8 -year retrospective clinical study”. Journal of Dentistry 79 (2018): 96-101.


Citation: Echegaray Yankova Daniel. “Comparison Between the Biologically Oriented Preparation Technique (BOPT) and the Horizontal Preparation Technique. About a Case”. Acta Scientific Dental Sciences 6.2 (2022): 95-102.


Copyright: © 2022 Echegaray Yankova Daniel. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.


Acceptance rate30%
Acceptance to publication20-30 days
Impact Factor1.278

Indexed In

News and Events

  • Certification for Review
    Acta Scientific certifies the Editors/reviewers for their review done towards the assigned articles of the respective journals.
  • Submission Timeline for Upcoming Issue
    The last date for submission of articles for regular Issues is July 10, 2024.
  • Publication Certificate
    Authors will be issued a "Publication Certificate" as a mark of appreciation for publishing their work.
  • Best Article of the Issue
    The Editors will elect one Best Article after each issue release. The authors of this article will be provided with a certificate of "Best Article of the Issue"
  • Welcoming Article Submission
    Acta Scientific delightfully welcomes active researchers for submission of articles towards the upcoming issue of respective journals.

Contact US