Dental implants placed in patients with mechanical risk factors: A long-term follow-up retrospective study

Abstract

Objectives:Risk factors in oral implantology are defined as local or systemic conditions that increase failure rates. The purpose of this paper is to evaluate the long-term survival rate of dental implants placed in patients presenting mechanical risk factors.Materials and Methods:This retrospective study was conducted only with patients presenting at least one of the following risk factors were included: Bruxism; crown-to-implant (C/I) ratio <0.8; abutment angulation. The overall implant survival was estimated using Kaplan–Meier analyses. Risk factors for implant failure were identified using the Cox proportional hazard regression models.Results:Eighty-nine eligible patients were enrolled in this study: They were both male (n = 56, 62.92%) and female (n = 33, 37.08%), with an average age of 53.24 (23–76 years), with 227 dental implants inserted. The mean follow-up was 13.6 years (range: 10–16 years). The overall 10-year Kaplan–Meier survival estimate with associated 95% confidence intervals was 86.34% (82.8, 87.1). Bruxism was the only variable that showed a statistically significant association with implant failure (P < 0.05) and a hazard ratio of 2.9, while both Crown to-implant and abutment angulations reported lower values of failure (P > 0.05).Conclusions:Within the limitations of this study, can be concluded that data suggested an evident relationship between bruxism and dental implant failure but further studies, with a larger sample and a different design are required to assess this relationship.

Histological and immunohistochemical evaluation of mandibular bone tissue regeneration

“…Implant failures may be categorized into early failures, which are associated with the surgical stage, 3 and late failures which occur after the prosthetic phase. 4 Peri-implantitis 5 , 6 is one of the most common cause of biological failures, while risk factors such as occlusal overload and the presence of cantilevers, as well as bruxism and clenching para-functional habits are related to mechanical failures. Implant placement requires a sufficient residual bone volume.…”

Odontología y Ética: sobreoferta y sobreterapia

“…Frecuentemente se programan implantes en personas desaseadas o bruxomanas y en pacientes médicamente comprometidos, sin prever riesgos ni consecuencias (Guillaume, 2016;Papi, 2017). Como lo demuestran muchos reportes de caso o revisiones sobre contraindicaciones médicas, los implantes pueden ser colocados en cualquier persona con compromiso sistémico, sin embargo aunque afirman no encontrar evidencias especificas, advierten y recomiendan evitar en lo posible el uso de implantes bajo estas circunstancias.…”

Estudo retrospectivo da reabilitação do edentulismo com um novo protocolo de prótese fixa implantossuportada

“…After readings, 23 full-text articles were excluded (Table 2). 5,24,25,28,29,32,[45][46][47][48][49][50][51][52][53][54][55][56][57][58][59][60][61][62] Six studies were included in the meta-analysis (Table 3), [7][8][9]12,13,63 all with low risk of biased results (Table 4). Four studies were retrospective and 2 were prospective.…”

“…Entretanto, embora não tenha sido o objetivo do estudo, há indícios de que a parafunção deva ser a maior causa de fracassos, não somente de próteses, bem como de implantes em médio e longo prazo. Hábitos parafuncionais são reconhecidamente deletérios, tanto às dentições artificiais, bem como às naturais (51,52).…”

“…As diretrizes atuais para o regime de manutenção de reabilitações implantossuportadas não estão bem definidas, baseando-se na maioria das vezes em protocolos utilizados na dentição natural (56). A maioria dos implantes deste estudo foi perdida devido a falhas tardias, sugerindo que poderia estar relacionada à periimplantite (57) ou sobrecarga, possivelmente associada a hábitos parafuncionais (51,52). Após o período de manutenção, nenhum dos sujeitos da pesquisa apresentou sinais de infecção.…”