纳米羟基磷灰石/聚酰胺66复合人工椎体治疗胸腰椎椎体肿瘤的效果

目的探讨纳米羟基磷灰石聚酰胺66(n-HA/PA66)复合人工椎体治疗胸腰椎椎体肿瘤中的应用价值。方法自2003年12月至2005年9月,对14例胸腰椎肿瘤患者行胸腰椎前路椎体切除、复合人工椎体植入、前路钉板内固定术。男性9例,女性5例,年龄32~68岁,平均50岁。T112例;T122例;L15例;L25例。病理学诊断:动脉瘤样骨囊肿3例,血管瘤5例,骨巨细胞瘤2例,转移瘤3例。结果术后随访3~18个月,平均10个月,复合人工椎体植骨融合率85.7%,无内固定松动及螺钉断裂,所有病例存活至今。结论彻底切除胸腰椎肿瘤,通过椎体间人工椎植入内固定重建脊柱的稳定性,疗效满意。复合人工椎体具有良好的生物相容性,植入融合率高,牢固可靠,是理想的骨移植替代材料。

Application of nano-hydroapaic crystals and polyamide composite for artificial vertebrae to treating thoracic or lumbar vertebrae tumor

Objective To discuss the application of nano-hydroapatic crystals and polyamide composite(n-HA/PA66) for artificial vertebrae in treating thoracic or lumbar vertebrae tumor.Methods A total of 14 cases suffering from thoracic or lumbar vertebrae tumor underwent deuto-total vertebrae resection via anterior approach,then canalis vertebralis was deboosted,artificial vertebrae was implanted and fixed with screw-stick system.Fourteen patients,9 male and 5 female were admitted by our hospital from Dec 2003 to Sep 2005,aged 32 to 68 years old(average 50).The tumor located at T_(11) in 2 cases,T_(12) in 2,L_1 in 5,L_2 in 5.Pathological diagnosis showed 3 cases were of aneurysmal bone cyst,5 of hemangioma,2 of giant cell tumor,3 of metastatic thoracic lumbar vertebra tumor. Results The follow-up lasted 3-18 months,mean 10 months.The rate of bone graft fusion reached 85.7%,with no loosened internal fixation or breakage of screw or stick.No screw breakage or spinal instability occurred during the follow-up.All cases were alive till follow-up finished.Conclusion If the thoracic vertebral tumor compresses spinal cord seriously,the patients should be recommended for surgical treatment.Total vertebrectomy followed by reconstruction could relieve the compression caused by tumor and restore the stabilization of spine effectively.Artificial vertebrae is the ideal substitute material for bone transplantation,for it has good biocompatibility,high security,high rate of bone graft fusion and firm fixation.