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首页> 外文期刊>The International journal of oral & maxillofacial implants >Influence of residual bone thickness on primary stability of hybrid self-tapping and cylindric non-self-tapping implants in vitro.
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Influence of residual bone thickness on primary stability of hybrid self-tapping and cylindric non-self-tapping implants in vitro.

机译：残余骨厚度对混合自攻和圆柱非自攻植入物体外稳定性的影响。

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Purpose: To assess the primary stability of a hybrid self-tapping implant and a cylindric non-self-tapping implant in an in vitro test model using polyurethane foam. Materials and Methods: Eighty standardized blocks of cellular rigid polyurethane foam, 2 cm long and 1 cm wide, with different thicknesses of 2, 4, 6, and 9 mm (n = 10 per group) were cut. Two implant systems-a hybrid self-tapping (Tapered Effect [TE], Straumann) and a cylindric non-self-tapping (Standard Plus [SP] Wide Neck, Straumann) were placed in the block specimens. Subsequently, resonance frequency analysis (RFA) was performed. The RFA measurements were made in triplicate on four aspects of each implant (mesial, distal, buccal, and oral), and the mean RFA value was calculated. Subsequently, the tensile load of the implants was determined by pull-out tests. The data were analyzed using one-way and two-way analysis of variance followed by a post hoc Scheffe test and a t test (α = .05). Additionally, the simple linear correlation between the RFA and tensile load values was evaluated. Results: No statistically significant differences were found between TE and SP in terms of RFA at different bone thicknesses. Starting from a bone thickness of 4 mm, TE implants showed significantly higher tensile load compared to SP implants (P = .016 to .040). A correlation was found between the RFA measurements and tensile load. Conclusions: Mechanically stable placement is possible with TE and SP implants in a trabecular bone model. RFA and tensile load increased with greater bone thickness.
机译：目的：在使用聚氨酯泡沫的体外测试模型中评估混合自攻植入物和圆柱非自攻植入物的主要稳定性。材料和方法：切割80个标准的多孔硬质聚氨酯泡沫块，长2 cm，宽1 cm，厚度分别为2、4、6和9 mm（每组n = 10）。将两种植入物系统-混合自攻（Tapered Effect [TE]，Straumann）和圆柱非自攻（Standard Plus [SP] Wide Neck，Straumann）放置在块状标本中。随后，进行共振频率分析（RFA）。对每个植入物的四个方面（局部，远端，颊和口腔）一式三份进行RFA测量，并计算平均RFA值。随后，通过拉出试验确定植入物的拉伸载荷。使用单向和双向方差分析，然后进行事后Scheffe检验和t检验（α= 0.05）对数据进行分析。另外，评估了RFA和拉伸载荷值之间的简单线性相关性。结果：在不同骨厚度的RFA方面，TE和SP之间没有发现统计学上的显着差异。从4 mm的骨厚度开始，TE植入物比SP植入物显示出明显更高的拉伸载荷（P = .016至.040）。在RFA测量值和拉伸载荷之间发现相关性。结论：在小梁骨模型中，TE和SP植入物可以实现机械稳定的放置。 RFA和拉伸负荷随着骨厚度的增加而增加。

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