Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Dental Materials and Biomaterial Research, Department of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders, Aßmannshauser Str. 4-6, 14197 Berlin, Germany; Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Department of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders, Aßmannshauser Str. 4-6, 14197 Berlin, Germany.
Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Dental Materials and Biomaterial Research, Department of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders, Aßmannshauser Str. 4-6, 14197 Berlin, Germany.
J Mech Behav Biomed Mater. 2018 Jan;77:85-89. doi: 10.1016/j.jmbbm.2017.09.005. Epub 2017 Sep 5.
Frequent reports attest to the various advantages of tapered implant/abutment interfaces (IAIs) compared to other types of interfaces. For this reason, a conical IAI was designed as part of the development of a PEEK (polyetheretherketone)-based dental implant. This IAI is equipped with an apically displaced anti-rotation lock with minimal space requirements in the form of an internal spline. The objective of this study was the determination of the average insertion torque (IT) at failure of this design, so as to determine its suitability for immediate loading, which requires a minimum IT of 32Ncm. 10 implants each made of unfilled PEEK, carbon fiber reinforced ("CFR") PEEK (> 50vol% continuous axially parallel fibers) as well as of titanium were produced and tested in a torque test bench. The average IT values at failure of the unfilled PEEK implants were measured at 22.6 ± 0.5Ncm and were significantly higher than those of the CFR-Implants (20.2 ± 2.5Ncm). The average IT values at failure of the titanium specimens were significantly higher (92.6 ± 2.3Ncm) than those of the two PEEK variants. PEEK- and CFR-PEEK-implants in the present form cannot adequately withstand the insertion force needed to achieve primary stability for immediate loading. Nevertheless, the achievable torque resilience of the two PEEK-variants may be sufficient for a two-stage implantation procedure. To improve the torque resistance of the PEEK implant material the development of a new manufacturing procedure is necessary which reinforces the PEEK base with continuous multi-directional carbon fibers as opposed to the axially parallel fibers of the tested PEEK compound.
经常有报道证明，与其他类型的接口相比，锥形种植体/基台接口（IAI）具有多种优势。出于这个原因，作为聚醚醚酮（PEEK）基牙科种植体开发的一部分，设计了一种圆锥形 IAI。这种 IAI 配备了一个根尖移位的防旋转锁，其空间要求最小，形式为内部花键。本研究的目的是确定这种设计的失效时的平均插入扭矩（IT），以确定其是否适合立即加载，这需要最小 IT 为 32Ncm。 每种设计都制造了 10 个未填充 PEEK、碳纤维增强（“CFR”）PEEK（> 50vol%连续轴向平行纤维）和钛种植体，并在扭矩测试台上进行了测试。未填充 PEEK 种植体失效时的平均 IT 值测量为 22.6 ± 0.5Ncm，明显高于 CFR-种植体（20.2 ± 2.5Ncm）。钛标本失效时的平均 IT 值明显高于两种 PEEK 变体（92.6 ± 2.3Ncm）。目前形式的 PEEK 和 CFR-PEEK 种植体不能充分承受达到立即加载初始稳定性所需的插入力。然而，两种 PEEK 变体的可实现扭矩弹性可能足以进行两阶段植入程序。为了提高 PEEK 种植体材料的抗扭阻力，有必要开发一种新的制造工艺，该工艺用连续的多向碳纤维增强 PEEK 基体，而不是测试的 PEEK 复合材料的轴向平行纤维。
