Takashima Makiko, Arai Yoshiaki, Matsuzaki Nanaka, Yamazaki Yuta, Nishiyama Hideyoshi, Nohno Kaname
Oral Implant and Temporomandibular Joint Clinic, Niigata University Medical and Dental Hospital, Niigata, Japan.
Division of Oral and Maxillofacial Radiology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan.
Clin Implant Dent Relat Res. 2023 Apr;25(2):313-320. doi: 10.1111/cid.13189. Epub 2023 Feb 1.
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.
This case-control study aimed to clarify the association between the cross-sectional area (CSA) of the masseter muscle and late implant failure.
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.
The incidence of late implant failure was significantly associated with masseter muscle CSA ≥504.5 mm (hazard ratio: 4.43; 95% CI: 1.82-10.79; p < 0.01).
Higher masseter muscle CSA increases the risk of late implant failure.
咬合负荷过重被认为是种植体后期失败的原因之一。然而，患者咬合力的大小是否为种植体后期失败的危险因素尚不清楚。
本病例对照研究旨在阐明咬肌横截面积（CSA）与种植体后期失败之间的关联。
本病例对照研究仅限于种植体支持的固定修复体。我们将至少有一处种植体后期失败的病例（n = 25例患者）与无种植体失败的对照组（n = 82例患者）进行比较。患者按年龄、性别、手术年份、颌骨和牙齿类型以及骨移植进行匹配。采用对数秩和Cox比例风险回归分析来确定种植体后期失败的可能危险因素。
种植体后期失败的发生率与咬肌CSA≥504.5 mm显著相关（风险比：4.43；95%置信区间：1.82 - 10.79；p < 0.01）。
较高的咬肌CSA会增加种植体后期失败的风险。
