Patient satisfaction and soft tissue changes around BioHPP® bar compared to cobalt chromium bar retaining mandibular implant-over dentures: A randomized clinical trial

Objective: To assess patient satisfaction and peri-implant soft tissue changes of PEEK (BioHPP ® ) bar compared to cobalt chromium (Co-Cr) bar retaining four implants mandibular overdenture. Subjects and methods: Ten completely edentulous participants received four implants and were allocated into two groups. Group I: Co-Cr-bar attachment, Group II: BioHPP ® -bar attachment. Mucosal recession (MR), probing depth (PD), modified plaque index (mPI) and modified bleeding index (mBI) were assessed at the time of overdentures insertion (T0), and after twelve months (T12). Patient satisfaction was also evaluated at (T12). Results: Co-cr bars showed significant increase in all studied peri-soft tissue parameters’ readings. In addition, BioHPP ® bars recorded significant better patient satisfaction scores regarding patient comfort, taste of food, esthetics than Co-Cr bars. Conclusion : Both Co-Cr bar and BioHPP® bar connecting implants supporting mandibular overdenture are considered potential treatment options. BioHPP ® bar presented better results than Co-Cr bar concerning soft tissue changes and patient satisfaction.