硬腭和颊侧微型种植体失败的生存估计和风险因素。
Survival estimates and risk factors for failure of palatal and buccal mini-implants.
出版信息
Angle Orthod. 2021 Nov 1;91(6):756-763. doi: 10.2319/090720-777.1.
OBJECTIVES
The primary objective was to compare the success and survival rates of palatal and buccal mini-implants for different locations and treatment requirements. The secondary objective was to evaluate risk factors influencing the survival of mini-implants.
MATERIALS AND METHODS
In this retrospective cohort, records of 127 orthodontic patients with 257 mini-implants were included after imposing inclusion/exclusion criteria. Along with the implant failure data, factors such as age, sex, transverse location, anteroposterior location, and purpose of mini-implants were recorded. Kaplan-Meier survival analysis was used to draw the curves and a Nathan Mantel-David Cox test to compare variables.
RESULTS
The failure rate of palatal mini-implants was 8.5%, whereas the failure rate for buccal shelf mini-implants was 68.7% (P < .0001). A significant difference was that the survival rates of palatal mini-implants were dependent on the purpose of the mini-implants and, for the buccal mini-implants, they were dependent on the skeletal malocclusion and location type of mini-implants (P < .05).
CONCLUSIONS
The overall survival rate of palatal mini-implants was high, at 91.5%. Of the buccal mini-implants, inter-radicular mini-implants had the highest survival rate for 12 (75.5%) and 24 (71.9%) months, while buccal shelf mini-implants had the lowest success and survival rates for 12 (31.3%) and 24 (20.8%) months. Class III malocclusion had the lowest survival rate for the buccal mini-implants (65.3% and 54.2%) for 12 and 24 months.
目的
主要目的是比较腭部和颊部微型种植体在不同位置和治疗需求下的成功率和存活率。次要目的是评估影响微型种植体存活率的风险因素。
材料与方法
在这项回顾性队列研究中，根据纳入/排除标准，共纳入了 127 名正畸患者的 257 个微型种植体的记录。除了种植体失败数据外，还记录了患者的年龄、性别、横向位置、前后位置以及微型种植体的用途等因素。采用 Kaplan-Meier 生存分析绘制曲线，采用 Nathan Mantel-David Cox 检验比较变量。
结果
腭部微型种植体的失败率为 8.5%，而颊部支架微型种植体的失败率为 68.7%（P<.0001）。显著差异在于，腭部微型种植体的存活率取决于微型种植体的用途，而对于颊部微型种植体，存活率取决于骨骼错颌畸形和微型种植体的位置类型（P<.05）。
结论
腭部微型种植体的总体存活率较高，为 91.5%。在颊部微型种植体中，根间微型种植体在 12 个月（75.5%）和 24 个月（71.9%）时的存活率最高，而颊部支架微型种植体在 12 个月（31.3%）和 24 个月（20.8%）时的成功率和存活率最低。对于颊部微型种植体，III 类错颌畸形的存活率最低，12 个月和 24 个月时分别为 65.3%和 54.2%。
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