{Reference Type}: Journal Article
{Title}: Masseter muscle cross-sectional area and late implant failure: A case-control study.
{Author}: Takashima M;Arai Y;Matsuzaki N;Yamazaki Y;Nishiyama H;Nohno K;
{Journal}: Clin Implant Dent Relat Res
{Volume}: 25
{Issue}: 2
{Year}: Apr 2023
{Factor}: 4.259
{DOI}: 10.1111/cid.13189
{Abstract}: <B>BACKGROUND: </B>Occlusal overload is considered to be one of the causes of late implant failure. However, it is unclear whether the magnitude of the patient's occlusal force is a risk factor for late implant failure.<BR><B>OBJECTIVE: </B>This case-control study aimed to clarify the association between the cross-sectional area (CSA) of the masseter muscle and late implant failure.<BR><B>METHODS: </B>This case-control study was limited to implant-supported fixed prostheses. We compared cases with at least one late implant failure (n = 25 patients) to controls (n = 82 patients) without implant failure. Patients were matched by age, sex, year of surgery, jaw and tooth type, and bone graft. Log-rank and Cox proportional hazard regression analyses were used to identify possible risk factors for late implant failure.<BR><B>RESULTS: </B>The incidence of late implant failure was significantly associated with masseter muscle CSA ≥504.5 mm2 (hazard ratio: 4.43; 95% CI: 1.82-10.79; p < 0.01).<BR><B>CONCLUSIONS: </B>Higher masseter muscle CSA increases the risk of late implant failure.