Cumulative survival rate and complication rates of single-tooth implant; focused on the coronal fracture of fixture in the internal connection implant
Cumulative survival rate and complication rates of single-tooth implant; focused on the coronal fracture of fixture in the internal connection implant
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DOI：
10.1111/joor.12065
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发表时间：
2013-08-01
影响因子：
2.9
通讯作者：
Lee, J. -H.
中科院分区：
文献类型：
--
作者：
Cha, H. -S.;Kim, Y. -S.;Lee, J. -H.
这项回顾性研究评价了用于单牙修复的4.0 mm内连接种植体（MicroThread（TM）Osseospeed（TM），Astra Tech）的5年累积生存率和并发症发生率。本研究纳入了2006年至2007年期间在牙山医疗中心接受治疗的患者。采用寿命表分析计算5年累积生存率。使用对数秩检验比较种植体位置（前牙、前磨牙和磨牙）、颌骨（上颌骨、下颌骨）、性别和假体类型（螺钉固位、骨水泥固位）之间的累积存活率。使用Fisher精确检验分析后装载并发症。12/136颗种植体（前牙22颗，前磨牙25颗，磨牙89颗）在加载过程中丢失，11颗因固位体冠状面断裂而被取出。全牙弓5年累积存活率为91.9%，磨牙区5年累积存活率为87.6%。不同种植体位置的累积生存率差异有统计学意义（P = 0.037），而不同性别、颌骨、修复体类型的累积生存率差异无统计学意义。47/114颗种植体（41.2%）出现了加载后并发症，包括固位体冠状面断裂和基台螺钉松动。
This retrospective study evaluated the 5-year cumulative survival rate and complication rates of a 4.0-mm internal connection implant (MicroThread (TM) Osseospeed (TM), Astra Tech) installed for single-tooth restoration. The patients who were treated at Asan Medical Center between 2006 and 2007 were included in this study. A life table analysis was used to calculate the 5-year cumulative survival rate. Comparisons of cumulative survival rates among implant position (anterior, premolar and molar), jawbone (maxilla, mandible), gender and prosthesis type (screw-retained, cement-retained) were performed using the log-rank test. Post-loading complications were analysed using Fisher's exact test. Twelve of 136 implants (anterior; 22, premolar; 25, molar; 89) were lost during the loading period, and 11 were removed due to coronal fracture of fixture. The 5-year cumulative survival rate of the whole arch was 91.9%, and that of the molar region was 87.6%. Statistically significant differences were observed in cumulative survival rates among implant position (P = 0.037), whereas no statistically significant differences were observed among gender, jawbone, prosthesis type. Forty-seven of 114 (41.2%) implants in the posterior region showed post-loading complications, including coronal fracture of fixture and abutment screw loosening.