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12 June 2017 : Clinical Research  

Effects of Titanium Mesh Cage End Structures on the Compressive Load at the Endplate Interface: A Cadaveric Biomechanical Study

Teng Lu1ABCE, Hui Liang1BF, Chao Liu2EF, Shuai Guo1BC, Ting Zhang1DF, Baohui Yang1BCD, Xijing He3AEG*

DOI: 10.12659/MSM.905466

Med Sci Monit 2017; 23:2863-2870

Abstract

BACKGROUND: This study aimed to evaluate whether obliquely angled and ring-shaped titanium mesh cage (TMC) end structures can improve the compressive load on the endplate interface in anterior cervical corpectomy and fusion (ACCF).

MATERIAL AND METHODS: A total of 23 volunteers underwent cervical lateral x-ray. The oblique angle of the superior endplate was measured, which was used to construct the gradient of the TMC end. Forty-two fresh cadaveric vertebral bodies were harvested and randomly distributed among four TMC groups with different ends. The baseline indicators of bone mineral density and anteroposterior and transverse dimensions were recorded. The superior endplate was placed at an angle of 12° when performing uniaxial compression testing. The maximum loads of the four TMCs were assessed.

RESULTS: There were no significant differences among the groups regarding the baseline indicators. The conventional TMC had the lowest maximum load (1362.3±221.78 N, p<0.05), whereas the TMC with an obliquely end ring had the highest maximum load (2095.82±285.64 N, p<0.05). The maximum loads of the TMCs with oblique footprints and flat end ring were much higher than that of the conventional TMC (p<0.05) but significantly lower than that of the TMC with the obliquely end ring (p<0.05), with average values of 1806.91±246.98 N and 1725.3±213.33 N, respectively.

CONCLUSIONS: Both the ring shape and oblique angle of the TMC end contributed to an increase in compressive force and are advocated for use in TMC structure optimization to decrease the incidence of TMC subsidence in ACCF.

Keywords: Cadaver, Compressive Strength, Decompression, Surgical, Prosthesis Design, Spinal Fusion

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Medical Science Monitor eISSN: 1643-3750
Medical Science Monitor eISSN: 1643-3750