RT Journal Article T1 Clinical behavior of posterior fixed partial dentures with a biologically oriented preparation technique: a 5-year randomized controlled clinical trial A1 Agustín Panadero, Rubén A1 Serra Pastor, Blanca A1 Loi, Ignacio A1 Suárez García, María Jesús A1 Peláez Rico, Jesús A1 Solá Ruíz, Fernanda AB Statement of problem. Evidence of the behavior of the periodontal tissues around anterior teeth restored with the biologically oriented preparation technique (BOPT) is available. However,outcomes of this technique in posterior teeth restored with fixed partial dentures (FPDs) are lacking. Purpose. The purpose of this randomized controlled clinical trial was to evaluate the clinical, mechanical, and biological behavior of posterior 3-unit FPDs placed on teeth prepared with BOPT.Material and methods. Forty participants received a 3-unit zirconia FPD in the posterior region of the mandible or maxilla. Twenty FPDs were placed on teeth prepared with BOPT (study group) and 20 on teeth with a horizontal chamfer finishing line (control group). Follow-up examinations were performed 1, 3, and 5 years after treatment to evaluate periodontal responses around the prepared teeth by means of the following parameters: plaque index, gingival index, probing depth, and marginal stability (MS). Mechanical behavior was also assessed, as were any complications.Results. After the 5-year follow-up, 57.9% of the control group and 35% of the BOPT group presented a plaque index of 1. The gingival index was 1 in 68.4% of the control group and 30%of the BOPT group after the follow-up period. In the analysis of probing depth, 26.3% of teeth in the control group had pockets of more than 3 mm in depth, whereas the BOPT group had only10%. Marginal stability appeared in 100% of the BOPT group, whereas only 10.5% of the control group exhibited gingival stability. Complications during the follow-up period were similar, 20% in the control group and 15% in the BOPT group.Conclusions. Posterior FPDs prepared by using BOPT had a good clinical response over a 5-year follow-up, with a low gingival index, a small increase in pocket depth, and a 100% marginalstability of the surrounding tissues. High survival rates after 5 years indicated that the technique produced predictable outcomes. PB Elsevier SN 0022-3913 YR 2021 FD 2021-06-21 LK https://hdl.handle.net/20.500.14352/97395 UL https://hdl.handle.net/20.500.14352/97395 LA eng NO Agustín-Panadero R, Serra-Pastor B, Loi I, Suárez MJ, Pelaez J, Solá-Ruíz F. Clinical behavior of posterior fixed partial dentures with a biologically oriented preparation technique: A 5-year randomized controlled clinical trial. J Prosthet Dent. 2021 Jun;125(6):870-876. DS Docta Complutense RD 28 abr 2025