Evaluation of peri-implant soft and hard tissues behavior in screw-retained crowns by the biologically oriented preparation technique (BOPT): Ambispective longitudinal analytical study

Victoria Mandillo-Alonso; Rocío Cascos-Sánchez; José-Luis Antonaya-Martín; Martín Laguna-Martos

doi:10.4317/jced.58924

Evaluation of peri-implant soft and hard tissues behavior in screw-retained crowns by the biologically oriented preparation technique (BOPT): Ambispective longitudinal analytical study

J Clin Exp Dent. 2022 Jan 1;14(1):e64-e71. doi: 10.4317/jced.58924. eCollection 2022 Jan.

Authors

Victoria Mandillo-Alonso¹, Rocío Cascos-Sánchez^{2

3}, José-Luis Antonaya-Martín^{4

5}, Martín Laguna-Martos⁶

Affiliations

¹ DDS, MDent. Collaborating Professor of Master Prótesis sobre Implantes. Rey Juan Carlos University. Avenida de Atenas s/n, 28922, Alcorcón, Madrid, España.
² DDS, MSD, MDS. MDent. Collaborating Professor of Postgrade Implantoprótesis Avanzada. Complutense University. Plaza Ramón y Cajal s/n, 28040, Madrid, España.
³ DDS, MSD, MDS. MDent. Collaborating Professor of Master Prótesis sobre Implantes. Rey Juan Carlos University. Avenida de Atenas s/n, 28922, Alcorcón, Madrid, España.
⁴ DDS, MSD, PhD, MDent. Director of Master Prótesis sobre Implantes. Rey Juan Carlos University. Avenida de Atenas s/n, 28922, Alcorcón, Madrid, España.
⁵ DDS, MSD, PhD, MDent. Collaborating Professor of Postgrade Implantoprótesis. Complutense University. Plaza Ramón y Cajal s/n, 28040, Madrid, España.
⁶ DDS. Collaborating Professor of Master Prótesis sobre Implantes. Rey Juan Carlos University. Avenida de Atenas s/n, 28922, Alcorcón, Madrid, España.

Abstract

Background: Clinical and radiographic evaluation of soft and hard tissues around convergent collar implants and shoulderless abutments.

Material and methods: Ambispective longitudinal analytical study with a sample size of 32 implants in 21 patients treated in a private dental clinic. Patients were divided into two groups: Prama Implants or group 1 (n=21) and Shelta implants combined with XA abutment or group 2 (n=11). Probing depth, horizontal mucosa thickness, peri-implant bone loss, plaque and bleeding after one-and two-year follow up are analyzed.

Results: In group 1, mean probing depth value was 1.67 mm (±0.58) and mean horizontal mucosa thickness value was 2.71 (±0.96). In group 2 mean probing depth was 2.18 (±0.40) and mean horizontal mucosa thickness value was 3.27 mm (±1.19). In group 1 an 85.7% of peri-implant bone level was maintained and a 14.3% increased. In group 2 a 100% of peri-implant bone level was maintained. In group 1 a 19% presented plaque when crowns were removed and in group 2 a 18.2% presented plaque. Neither of two groups presented spontaneous bleeding when crowns were removed. A 52.4% presented probing bleeding in group 1 and a 45.4% in group 2.

Conclusions: Biologically guided crowns design seems to provide peri-implant hard and soft tissue stability. Key words:Biologic width, peri-implant soft tissue, marginal bone loss, transmucosal implant, convergent collar, BOPT (biological oriented preparation technique), BOPT abutment, soft tissue stability.