An additively manufactured titanium tilting suture anchor: a biomechanical assessment on human and ovine bone specimens.

Autor:	Abedi A; Department of Mechanical Engineering, Sharif University of Technology, Tehran, Iran., Pourghazi F; Center for Orthopedic Trans-Disciplinary Applied Research, Tehran University of Medical Sciences, Tehran, Iran.; Orthopedic Surgery Department, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran., Eslami M; Center for Orthopedic Trans-Disciplinary Applied Research, Tehran University of Medical Sciences, Tehran, Iran.; Orthopedic Surgery Department, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran., Nabian MH; Center for Orthopedic Trans-Disciplinary Applied Research, Tehran University of Medical Sciences, Tehran, Iran.; Orthopedic Surgery Department, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran., Ali Mohammadi AM; Legal Medicine Research Center, Legal Medicine Organization of Iran, Tehran, Iran., Zanjani LO; Center for Orthopedic Trans-Disciplinary Applied Research, Tehran University of Medical Sciences, Tehran, Iran.; Orthopedic Surgery Department, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran., Farahmand F; Department of Mechanical Engineering, Sharif University of Technology, Tehran, Iran.
Jazyk:	angličtina
Zdroj:	Frontiers in surgery [Front Surg] 2023 Nov 30; Vol. 10, pp. 1195728. Date of Electronic Publication: 2023 Nov 30 (Print Publication: 2023).
DOI:	10.3389/fsurg.2023.1195728
Abstrakt:	Introduction: A novel titanium tilting suture anchor was designed and fabricated using additive manufacturing. The anchor enjoyed a nonsymmetrical structure to facilitate its insertion procedure through a weight-induced tilt, a saw-teeth penetrating edge to provide a strong initial fixation into cancellous bones of various densities, and an appropriate surface texture to enhance the longterm fixation strength through bone ingrowth. Methods: Biomechanical tests were performed on 10 ovine and 10 human cadaveric humeri to examine the insertion procedure and assess the initial fixation strength of the anchor, in comparison with a standard screw-type anchor as control. Results: This study indicated a simple yet reliable insertion procedure for the tilting anchor. All anchors survived after 400 cycles of cyclic loadings and failed in the load-to-failure step. There were no significant differences between the displacements and fixation stiffnesses of the anchors in either group. The ultimate failure load was significantly smaller (p<0.05) for tilting anchors in ovine group (273.7 ± 129.72 N vs. 375.6 ± 106.36 N), but not different in human group (311.8 ± 82.55 N vs. 281.9 ± 88.35). Also, a larger number of tilting anchors were pulled out in ovine group (6 vs. 3) but a smaller number in human group (4 vs. 6). Conclusion: It was concluded that the biomechanical performance of the designed tilting anchor is comparable with that of the standard screw-type anchors. Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. (© 2023 Abedi, Pourghazi, Eslami, Nabian, Ali Mohammadi, Zanjani and Farahmand.)
Databáze:	MEDLINE
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