Astra Tech and Branemark system implants:: a 5-year prospective study of marginal bone reactions
Astra Tech and Branemark system implants:: a 5-year prospective study of marginal bone reactions
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DOI：
10.1111/j.1600-0501.2004.01028.x
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发表时间：
2004-08-01
影响因子：
4.3
通讯作者：
Feldmann, H
中科院分区：
文献类型：
--
作者：
Åstrand, P;Engquist, B;Feldmann, H
本文描述了Astra Tech和Branemark系统植入物对比研究的5年结果。其目的是主要就骨水平变化以及其他感兴趣的变量对系统进行比较。66例无牙颌患者纳入研究。使用随机化时间表将患者分配至两种植入系统。使用了184个Astra Tech种植体和187个Branemark种植体。采用两阶段技术插入种植体，并按照相应种植体系统的常规进行插入。所有患者均采用全弓固定桥。所有患者从固定装置插入到5年随访期间进行临床和影像学检查。Astra种植体和Branemark种植体在固定装置插入和5年检查之间上颌的总平均骨水平变化分别为-1.74+/-0.45 mm和-1.98+/-0.21 mm。Astra和Branemark下颌骨的相应值分别为-1.06+/-0.19和-1.38+/-0.17。边缘骨水平的主要术后变化发生在固定装置插入和基线之间。在此期间，植入物系统之间的骨重建模式也不同。在基线（假体连接）和5年检查之间，边缘骨水平变化很小，植入系统之间没有差异。在去除上结构的情况下检查种植体稳定性。在5年检查时，Astra Tech种植体的存活率为98.4%，Branemark种植体的存活率为94.6%。差异无统计学意义。
This paper describes the 5-year results of a comparative study between Astra Tech and Branemark system implants. The aim was to compare the systems primarily with regard to bone level changes, and also with regard to other variables of interest. Sixty-six patients with edentulous jaws were included in the study. Randomisation schedules were used to allocate the patients to the two implant systems. 184 Astra Tech implants with a titanium-blasted surface and 187 Branemark implants with a turned surface were used. The implants were inserted with a two-stage technique and the insertion followed the routines for the respective implant system. All patients were provided with full-arch fixed bridges. All patients were followed up with clinical and radiographic examinations from fixture insertion to the 5-year follow-up. The total mean bone level change in the upper jaw between fixture insertion and the 5-year examination was -1.74+/-0.45 mm at the Astra implants and -1.98+/-0.21 at the Branemark implants. The corresponding values for the lower jaw were -1.06+/-0.19 for Astra and -1.38+/-0.17 for Branemark. The major postoperative changes of the marginal bone level took place between fixture insertion and baseline. During this period, there was also a different pattern of bone remodelling between the implant systems. Between baseline (prosthesis connection) and the 5-year examination, the marginal bone level changes were small, with no difference between the implant systems. The implant stability was examined with the supraconstructions removed. At the 5-year examination, the survival rate for Astra Tech implants was 98.4% and for the Branemark implants it was 94.6%. The difference was not statistically significant.