Anitua Eduardo, Saracho Juan, Begoña Leire, Alkhraisat Mohammad Hamdan
Oral implantology, Eduardo Anitua Foundation, Vitoria, Spain.
Eduardo Anitua Foundation, Vitoria, Spain.
Clin Implant Dent Relat Res. 2016 Aug;18(4):769-77. doi: 10.1111/cid.12350. Epub 2015 Apr 27.
The use of narrow-diameter implants (NDIs; <3.75 mm) constitutes an alternative to bone augmentation procedure. Long-term evaluation of NDIs with a diameter <3.0 mm is still lacking.
Analyze the long-term outcomes of 2.5-mm NDIs splinted to regular-sized implants for supporting partial and complete fixed prostheses.
Patients charts were retrospectively analyzed to select patients treated by the insertion of at least one 2.5-mm two-piece implant before July 2005. The study was based on the available charts (no patient was recalled). Patient's demographic data were described. The known implant length was used as a reference to calibrate the linear measurements of marginal bone loss on digital periapical radiograph. Implant details, survival and prosthetic complications were analyzed.
Thirty-seven 2.5-mm implants placed in 20 patients (mean age at surgery: 54.05 ± 9.7 years) in maxilla and mandible were included and evaluated. The implants' mean follow-up time since insertion was 6.5 ± 3.2 years (range 0 to 9.7 years). The follow-up time was more than 7 years for 22 implants. One implant failed due to lack of osseointegration. Two prosthetic complications (connector and porcelain fracture) occurred. The survival rate was 97.3% for implants and 92.0% for prostheses. The mean marginal bone loss at the mesial and distal aspect was 0.70 ± 0.55 and 0.72 ± 0.56 mm, respectively.
When dental implants of 2.5 mm in diameter are splinted by a fixed prosthesis, long-term favorable outcomes could be obtained.
使用窄直径种植体（NDIs；<3.75毫米）是骨增量手术的一种替代方法。目前仍缺乏对直径<3.0毫米的NDIs的长期评估。
分析与常规尺寸种植体联冠的2.5毫米NDIs支持部分和全口固定修复体的长期效果。
回顾性分析患者病历，以选择2005年7月前植入至少一枚2.5毫米两件式种植体的患者。本研究基于现有病历（未召回任何患者）。描述了患者的人口统计学数据。以已知的种植体长为参考，校准根尖片上边缘骨吸收的线性测量值。分析了种植体细节、存留情况和修复并发症。
纳入并评估了20例患者（手术时平均年龄：54.05±9.7岁）在上颌和下颌植入的37枚2.5毫米种植体。种植体植入后的平均随访时间为6.5±3.2年（范围0至9.7年）。22枚种植体的随访时间超过7年。一枚种植体因骨结合失败而脱落。发生了两例修复并发症（连接体和瓷裂）。种植体存留率为97.3%，修复体存留率为92.0%。近中侧和远中侧的平均边缘骨吸收分别为0.70±0.55毫米和0.72±0.56毫米。
当2.5毫米直径的牙种植体通过固定修复体联冠时，可获得长期良好效果。
