Valentine J D, Reiman B E, Beuttenmuller E A, Donovan M G
Oral and Maxillofacial Surgery, Hays Army Hospital, Ford Ord, California, 93941.
J Oral Maxillofac Surg. 1989 Jul;47(7):689-96. doi: 10.1016/s0278-2391(89)80007-2.
Proplast II disc implants (Vitek Inc, Houston) were used in nine patients (14 joints) who underwent discectomy of the temporomandibular joint (TMJ). These patients subsequently underwent removal of the implants from 10 to 28 months postplacement due to pain and occlusal changes or radiographic changes in the joints. Light and electron microscopic evaluations were performed on the retrieved implants and surrounding tissue. Evidence of gross deterioration manifested by fracture of the implant was present in 10 of the 14 implants, and microscopic evidence of deterioration was present in all implants. Foreign-body giant cell reaction in surrounding tissues and microfragmentation of the implant were evident in all joints.
九名患者（14个关节）接受了颞下颌关节（TMJ）椎间盘切除术，术中使用了Proplast II椎间盘植入物（Vitek公司，休斯顿）。这些患者在植入后10至28个月，因疼痛、咬合改变或关节影像学改变，随后接受了植入物取出术。对取出的植入物和周围组织进行了光镜和电镜评估。14个植入物中有10个出现了植入物骨折导致的明显肉眼可见的退化迹象，所有植入物均有微观层面的退化迹象。所有关节周围组织均出现异物巨细胞反应和植入物微碎裂。
