Int J Oral Maxillofac Implants. 2020 Mar/Apr;35(2):342-349. doi: 10.11607/jomi.7784.
To evaluate the effect of continuous tooth eruption on the outcomes of single-implant-supported restorations in the anterior maxilla of adults.
Seventy-six patients (age: 21 to 78 years) treated with single-implant-supported restorations in the esthetic zone were included. Radiographs obtained at crown placement and follow-up examinations from 1 to 15 years postloading were analyzed with regard to vertical incisal plane changes of the implant-supported crown relative to adjacent teeth.
Infraocclusion increased over time by 0.08 ± 0.02 mm/year. Infraocclusion was more pronounced (P = .04) for delayed (0.09 mm/year) versus immediate implant placement (0.06 mm/year) and for younger versus older adults (0.0013 mm/year per additional year of age; P = .014). No statistically significant association between infraocclusion and sex, ethnicity, implant site, timing of implant temporization, surgical protocol, and type of restoration was found.
Infraocclusion of single-implant-supported maxillary anterior restorations may result in esthetic concerns over time. Greater infraocclusion occurs in delayed implant placement and in younger individuals.
评估上颌前牙连续牙齿萌出对单颗种植体支持修复体预后的影响。
共纳入 76 名（年龄 21-78 岁）接受上颌前牙美学区单颗种植体支持修复体治疗的患者。对修复体戴牙后 1 至 15 年的临床随访 X 线片进行分析，评估种植体支持冠相对于邻牙的切牙垂直向倾斜变化。
随着时间的推移，临床冠向龈下方向的移动增加了 0.08±0.02mm/年。与即刻种植相比，延迟种植（0.09mm/年）会导致更明显的临床冠向龈下方向的移动（P=0.04），且患者年龄越小，临床冠向龈下方向的移动越明显（每年增加 0.0013mm/年，P=0.014）。临床冠向龈下方向的移动与性别、种族、种植体部位、种植体临时修复时机、手术方案和修复体类型之间均无统计学显著相关性。
上颌前牙单颗种植体支持修复体的临床冠向龈下方向的移动可能会随着时间的推移导致美学问题。延迟种植和患者年龄较小会导致更明显的临床冠向龈下方向的移动。
