Ângulo e perfil de emergência como indicador de risco para peri-implantite

: a scoping review

Abstract

Introduction: Peri-implantitis is an important complication that can lead to the failure of long-term functional maintenance of dental implants. Recent research in this area has highlighted the potential role of prosthetic design, particularly the angle and emergence profile, in the development of relevant peri-implant diseases. The literature remains heterogeneous when it comes to establishing cause/effect outcomes and the association of clear etiological factors with peri-implantitis. Aim: This scoping review aims to synthesize the available literature on the influence of the angle and emergence profile of prosthetic components on peri-implantitis. Materials and Methods: Electronic searches were carried out on b-on, Web of Science and PubMed until April 2025. Clinical studies and systematic reviews evaluating the relationship between the emergence angle and/or emergence profile of implant-supported restorations and peri-implant tissue health were included. Data extraction covered study design, sample size, type of prosthesis, follow-up, diagnostic criteria for peri-implantitis and main results. Results: Ten studies met the inclusion criteria, including cross-sectional studies, retrospective studies, randomized clinical trials and systematic reviews. Most studies identified an emergence angle of more than 30º and a convex emergence profile as significant risk factors for the increased prevalence of peri-implantitis and marginal bone loss. Concave or straight emergence profiles were associated with greater stability of the peri-implant tissues and easier maintenance. Some studies did not find a significant risk factor for the increased prevalence of peri-implantitis and marginal bone loss. Conclusion: Current evidence suggests that prosthetic designs with an emergence angle greater than 30º and a convex emergence profile are associated with a higher risk of peri-implantitis and marginal bone loss. Clinical protocols should prioritize reduced emergence angles and concave profiles to promote peri-implant tissue health. More prospective studies with standardized diagnostic criteria are needed to confirm these results.

Date of Award	16 Jul 2025
Original language	Portuguese
Awarding Institution	Universidade Católica Portuguesa
Supervisor	Rita Bornes (Supervisor) & André Correia (Co-Supervisor)