颈椎前路减压植骨融合术后颈椎后凸畸形的原因分析

目的：探讨颈椎前路椎体植骨融合术后颈椎后凸畸形的原因。方法：随诊1982年8月-2000年12月274例行颈椎前路减压、单纯植骨融合术的病例，对其中确诊为颈椎后凸畸形患者的手术减压节段、植骨方式、骨融合情况及术后颈椎后凸畸形的进展对疗效的影响进行分析。结果：随访2年3个月～7年6个月，平均4年1个月，17例患者确诊为颈椎后凸畸形；术后1年时融合节段前柱短缩明显，颈椎后凸畸形最明显，其中12例为双节段减压、Keystone式植骨；8例后期颈椎植骨融合节段上下相邻椎体不稳：17例患者术前JOA评分平均10．2分．术后1年平均15．2分，末次随访时为15．6分。结论：单纯颈椎前路减压植骨融合术后因减压节段和值骨方式的不同使融合节段前柱短缩及植骨融合节段上下相邻椎体不稳是颈椎后凸畸形的直接原因。     

Major bone defect treatment with an osteoconductive bone substitute

A bone defect can be provoked by several pathological conditions (e.g. bone tumours, infections, major trauma with bone stock loss) or by surgical procedures, required for the appropriate treatment. Surgical techniques currently used for treating bone defects may count on different alternatives, including autologous vascularized bone grafts, homologous bone graft provided by musculoskeletal tissue bank, heterologous bone graft (xenograft), or prostheses, each one of them dealing with both specific advantages and complications and drawbacks. The main concerns related to these techniques respectively are: donor site morbidity and limited available amount; possible immune response and viral transmission; possible animal-derived pathogen transmission and risk of immunogenic rejection; high invasiveness and surgery-related systemic risks, long post-operative. physical recovery and prostheses revision need. Nowadays, an ideal alternative is the use of osteoconductive synthetic bone substitutes. Many synthetic substitutes are available, used either alone or in combination with other bone graft. Synthetic bone graft materials available as alternatives to autogeneous bone include calcium sulphates, special glass ceramics (bioactive glasses) and calcium phosphates (calcium hydroxyapatite, HA; tricalcium phosphate, TCP; and biphasic calcium phosphate, BCP). These materials differ in composition and physical properties fro each other and from bone (De Groot in Bioceramics of calcium phosphate, pp 100–114, 1983; Hench in J Am Ceram Soc 74:1487–1510, 1994; Jarcho in Clin Orthop 157:259–278, 1981; Daculsi et al. in Int Rev Cytol 172:129–191, 1996). Both stoichiometric and non-stoichiometric HA-based substitutes represent the current first choice in orthopedic surgery, in that they provide an osteoconductive scaffold to which chemotactic, circulating proteins and cells (e.g. mesenchymal stem cells, osteoinductive growth factors) can migrate and adhere, and within which progenitor cells can differentiate into functioning osteoblasts (Szpalski and Gunzburg in Orthopedics 25S:601–609, 2002). Indeed, HA may be extemporarily combined either with whole autologous bone marrow or PRP (platelet rich plasma) gel inside surgical theatre in order to favour and accelerate bone regeneration. A case of bifocal ulnar bone defect treated with stoichiometric HA-based bone substitute combined with PRP is reported in here, with a 12-month-radiographic follow-up.     

骨板旋转植骨加人工骨移植联合治疗长管骨骨折延迟愈合

目的 :探讨骨板旋转植骨加人工骨移植联合治疗长管骨骨折延迟愈合的疗效。方法 :12例四肢长管骨内固定术后骨折延迟愈合患者 ,均采用骨板旋转植骨加骨骼生髓内移植联合治疗并随访 6～ 9个月 ,观察骨愈合时间。结果 :12例患者全部骨性愈合 ,平均愈合时间 2 .5个月 ,肢体功能恢复满意。结论 :骨板旋转植骨加骨骼生移植术不干扰骨折部血运 ,是治疗四肢长管骨骨折延迟愈合的良好方法。     

Reconstruction of anterior iliac crest bone graft donor sites: presentation of a surgical technique

This study is a prospective evaluation of the reconstruction of anterior iliac crest bone graft donor sites using a technique developed by the authors. We present the technique and the initial results obtained with its use in 15 patients followed up for a period ranging from 6 to 16 months. Reconstruction of the iliac crest is performed using a rib, which is removed by an anterior approach to the spine. The rib is divided into two segments, which are fitted into the defect created in the iliac crest after removal of the bone graft. Clinical evaluation of the patients found a good cosmetic appearance of the reconstruction site, and the rib segments used showed good radiologic integration. Partial resorption of the segments was observed in two patients, with no effects on the cosmetic result. Received: 3 May 1999 Revised: 13 August 1999 Accepted: 18 August 1999     

硫酸钙人工骨填充良性骨肿瘤刮除后骨缺损愈合情况的临床研究

目的分析硫酸钙人工骨填充良性骨肿瘤刮除后骨缺损的愈合情况,探讨人工骨在骨肿瘤切除重建中的作用。方法自2005年12月至2008年3月,应用Osteo Set硫酸钙人工骨移植治疗72例原发良性骨肿瘤,其中随访资料完整的47例。根据术后随访期X线片所见评估人工骨降解、吸收和骨愈合生长情况,评估38例含脱钙骨基质（demineralized bone matrix,DBM）和9例未含DBM硫酸钙人工骨的愈合情况,研究植骨量对愈合情况的影响,同时采用肌肉骨骼肿瘤协会（Musculoskeletal Tumor Society,MSTS）功能评分评价关节功能。结果 47例患者获3～55个月随访,平均随访时间16.3个月。均有人工骨颗粒与宿主骨间隙变模糊以及颗粒间变模糊,平均用时3.1（1～6）个月;42例完全吸收,用时4.2（1～12）个月;27例重新塑形,用时7.3（3～17）个月。人工骨愈合良好39例（83.0%）,未出现不愈合病例。含DBM硫酸钙与不含DBM硫酸钙人工骨植入患者的愈合率分别为89.5%和77.8%。植骨量≤5mL组愈合率95.6%,用时6.8（3～12）个月;植骨量〉5mL组愈合率79.2%,用时5.5（3～17）个月。对两组愈合率、愈合时间进行比较,差异无统计学意义（Z=-0.100,P=0.920;Z=-0.650,P=0.516）。MSTS功能评分平均28.8分。术后2例出现伤口不愈合。结论对于良性骨肿瘤切除后骨缺损的重建,硫酸钙人工骨愈合效果满意,是一种安全、有效的移植材料。     

Anti-infective reconstituted bone xenograft used for primary bone grafting to repair contaminated defect in the radius in dogs

Objective: To investigate the effect of anti-infective reconstituted bone xenograft as a primary graft to repair a segmental with severe contamination. Methods: A canine model of contaminated defect of 1.5 cm in size in the radius was used, in which antiinfective reconstituted bone xenograft or reconstituted bone xenograft was implanted as a primary graft followed by internal fixation. The effectiveness of the two grafting materials in repairing a contaminated segmental defect was compared. Resuits: The animals which had received implant of anti-infective reconstituted bone xenograft should largely healed defects 6 months after operation while the defects implanted wit]h reconstituted bone xenograft remained unrepaired witla bone infection. Conclusions: Besides its strong osteoinductive and osteoconductive activity, anti-infective reconstituted bone xenograft is highly antibacterial and can be used as a primary graft to repair the severely contaminated segmental defect.     

Recombinant bone morphogenetic protein-7 as an intracorporal bone growth stimulator in unstable thoracolumbar burst fractures in humans: preliminary results

The study presented here is a pilot study in five patients with unstable thoracolumbar spine fractures treated with transpedicular OP-1 transplantation, short segment instrumentation and posterolateral fusion. Recombinant bone morphogenetic protein-7 in combination with a collagen carrier, also referred to as OP-1, has demonstrated ability to induce healing in long-bone segmental defects in dogs, rabbits and monkeys and to induce successful posterolateral spinal fusion in dogs without need for autogenous bone graft. Furthermore OP-1 has been demonstrated to be effective as a bone graft substitute when performing the PLIF maneuver in a sheep model. Five patients with single-level unstable burst fracture and no neurological impairment were treated with intracorporal OP-1 transplantation, posterior fixation (USS) and posterolateral fusion. One patient with osteomalacia and an L2 burst fracture had an additional intracorporal transplantation performed proximal to the instrumented segment, i.e. OP-1 into T 12 and autogenous bone into T 11. Follow-up time was 12–18 months. On serial radiographs, Cobb and kyphotic angles, as well as anterior, middle and posterior column heights, were measured. Serial CT scans were performed to determine the bone mineral density at fracture level. In one case, radiographic and CT evaluation after 3 and 6 months showed severe resorption at the site of transplantation, but after 12 months, new bone had started to fill in at the area of resorption. In all cases there was loss of correction with regard to anterior and middle column height and sagittal balance at the latest follow-up. These preliminary results regarding OP-1 as a bone graft substitute and stimulator of new bone formation have been disappointing, as the OP-1 device in this study was not capable of inducing an early sufficient structural bone support. There are indications to suggest that OP-1 application to a fracture site in humans might result in detrimental enhanced bone resorption as a primary event. Received: 13 February 1999 Revised: 4 August 1999 Accepted: 18 August 1999     

异体松质骨移植治疗骨肿瘤切除后骨缺损

目的：探讨应用异体松质骨移植治疗肿瘤切除后骨缺损的生物材料填充方法。方法：总结应用深低温冷冻保存异体松质骨移植治疗骨肿瘤切除后骨缺损57例。年龄6－56岁,平均年龄17．4岁。结果：除1例因感染异体骨取出外,其余56例均取得满意的骨愈合,愈合时间平均为4．5个月。依骨腔大小或植骨量的不同愈合时间 亦有所不同。单纯异体松质骨移植与异体松质骨加自体松质骨混合移植相比,愈合时间没有明显不同。植骨量越大,骨愈合时间越长。此组患者中未见明显排异反应及并发感染者。肿瘤复发率为7％。结论：同其他骨缺损填充方法和大块异体骨的使用相比,此种方法可行性较好,安全性较高。在骨愈合率,骨愈合时间上及复发以外并发症的发生上同自体松质骨植骨无明显差异。     

骨形态发生蛋白复合物联合自体骨髓移植治疗四肢长管状骨骨不连

目的:观察骨形态发生蛋白复合物联合自体红骨髓移植治疗四肢长管状骨骨不连的临床疗效.方法:自2004年1月至2010年12月,采用骨形态发生蛋白复合物联合自体红骨髓移植法治疗四肢长管状骨骨不连患者36例,男22例,女14例;年龄22～68岁,平均36.8岁.骨不连部位:肱骨6例,尺骨4例,桡骨3例,股骨10例,胫骨13例.伤后距治疗时间8～24个月,平均13.7个月.增生性骨不连22例,萎缩性骨不连14例 患者主要临床症状为骨折部位负重时疼痛,肢体肿胀X线片提示骨折线清晰伴骨缺损.术后通过观察手术切口愈合、植骨区及骨髓穿刺区反应、骨折愈合、邻近的关节功能恢复等情况评估手术疗效.结果:术后患者切口均甲级愈合,未发现过敏和免疫排斥反应.骨髓穿刺区无感染及血肿形成.36例患者均获随访,时间3～28个月,平均16.2个月.无骨髓穿刺区慢性疼痛、植骨区骨质感染、切口周围皮肤红肿或窦道形成.骨不连均获得骨性愈合,愈合时间3～12个月,平均6.2个月,无畸形愈合.骨不连愈合后骨折部位负重时疼痛消失、肢体肿胀消退.5例患者遗留邻近关节功能部分受限,其余患者均完全恢复.结论:骨形态发生蛋白复合物联合自体红骨髓移植在治疗四肢长管状骨骨不连中具有来源广泛、安全可靠、加速骨愈合等优点,是其理想的植骨材料之一.     

侧前路病灶清除植骨和单侧钉棒系统固定治疗腰骶段脊柱结核

目的：评价侧前路病灶清除、植骨和单侧钉棒系统固定治疗腰骶段脊柱结核的临床疗效。方法：2003年8月～2006年3月采用侧前路病灶清除、同侧自体髂骨植骨和单侧钉棒系统固定治疗腰骶段脊柱结核患者11例，其中L5 5例，S1 3例，L5～S1 3例。持续性腰痛8例，伴单侧下肢放射痛6例，单侧下肢肌力和痛、触觉减退5例。结果：术中无大血管和神经损伤等严重并发症发生。术后所有患者腰腿痛基本消失：5例下肢肌力和痛、触觉减退者，4例恢复正常，1例好转。4例术后2～7d出现腹胀不适，1例出现逆行射精。随访6～24个月,平均14个月，均获骨性愈合，无钉棒折断、松动等并发症，9例随访1年以上者无结核复发。结论：侧前路病灶清除、植骨和单侧钉棒系统固定是治疗腰骶段脊柱结核的一种有效手术方法。     

脊柱前路手术髂前嵴取骨并发症相关分析

目的:探讨脊柱前路手术髂前嵴取骨的并发症发生情况。方法:回顾性分析2001年1月-2005年9月取髂骨行脊柱植骨融合术的154例患者,取骨部位均为髂前嵴,统计供骨区并发症,分析其相关因素。结果:术后随访时间均超过1年。28例(18.2%)患者发生不同程度的并发症,其中14例(9.1%)出现轻度并发症,12例(7.8%)出现中度并发症,2例(1.3%)出现重度并发症。127例(82.5%)患者接受了问卷调查,其中17例(13.4%)患者诉取骨处疼痛,疼痛自我感觉评分为1-6分(平均2分),其中3例(2.4%)患者需服用非甾体类抗炎药以减轻疼痛;7例(5.5%)患者诉取骨处有麻木感;无患者诉取骨处的疼痛及麻木感影响其日常活动;122例(96.1%)患者对供骨区切口外观满意。结论:髂前嵴取骨并发症中供骨区疼痛及麻木发生率较高,尤其是疼痛,应引起足够的重视。     

一种新型生物活性人工骨的制备及成骨活性的研究

目的：研制CPC/BMP复合人工骨,检测其成骨活性。方法：制备CPC/BMP及CPC骨块,扫描电子显微镜观察表面结构。用小鼠肌袋植入实验观察材料的成骨活性。结果：BMP在CPC中呈微球状均匀分布。CPC植入小鼠肌袋内不能诱导,CPC/BMP植入后1周有软骨细胞出现,2周有编织骨,4周以后小梁骨生成,16周出现成熟的板层骨。同时材料出现降解迹象。有机质含量、碱性磷酸酶浓度在CPC/BMP组出现升高,扫描电镜结果同样证实有新骨形成。结论：CPC/BMP生物活性人工骨可异位诱导成骨,可望成为新型的骨缺损修复材料。     

Biomechanical properties of heat-treated bone grafts

Introduction A possible critical complication associated with banking bone is human immunodeficiency virus (HIV) infection. Recently, since the report of HIV infection in bone allografts from an HIV-seronegative donor, a more reliable method of sterilization for preserved bone graft has become necessary. Heat treatment of banking bone is one of the simple sterilization methods. This method is especially safe and practical for the prevention of HIV infection.Materials and methods We previously reported a biological study on heat-treated bone graft. In that study, we showed that revascularization and new bone formation of bone graft after heat treatment at 60°C was nearly the same as that of non-heat-treated bone graft, while at 100°C, revascularization and new bone formation showed a significant delay. This time, we examined the change of mechanical strength of heat-treated bone grafts after transplantation in an experiment. To eliminate the problem of antigenicity of grafted bone, we used autografts, not allografts. Two types of heat-treated autografts were employed: heat-treated at 60°C for 30 min and heat-treated at 100°C for 5 min; as a control, fresh autografts were replaced in the left femur of rabbits. A strength test was performed for both the transplanted bone and the untreated intact right femur with time after transplantation. The strength test consisted of a compression test and torsional test, and the strength was compared between transplanted bone and the untreated intact right femur.Results In the compression test, the grafts heat-treated at 60°C showed a strength ratio before transplantation of 97.3%. The strength ratio decreased to 63.5% at 18 weeks after transplantation. Then the strength ratio increased and recovered to 94.5% at 48 weeks after transplantation. However, the grafts heat-treated at 100°C showed unsatisfactory mechanical strength, at 48 weeks the strength ratio was 60.1%, which was significantly lower compared with controls. In the torsional test, the grafts heat-treated at 60°C showed almost the same strength observed in the compression test. However, the grafts heat-treated at 100°C showed unsatisfactory mechanical strength: at 48 weeks, the strength ratio was 57.3%.Conclusion Therefore, heat treatment at 60°C is a useful sterilization method, not only in biological but also mechanical terms.     

A biomechanical comparison of scaphoid fixation with bone grafting using iliac bone or distal radius bone

PURPOSE: Although many scaphoid fractures may be treated by immobilization, complex scaphoid fractures generally require bone grafting with internal fixation. A preferred source of bone graft for scaphoid grafting is the iliac crest. Donor site morbidity from iliac crest harvest, however, is a known complication, and the comparable strength and osteogenic properties of bone harvested from other sites are unclear. To this end, we have conducted a cadaveric comparative investigation of the strength of scaphoid nonunions with bone graft and internal fixation using either iliac crest bone or distal radius bone. METHODS: Ten paired, human, fresh-frozen cadaveric wrists were used to create a standard midwaist wedge osteotomy into which identically shaped distal radius or iliac crest bone wedges were internally fixed using headless compression screws. After bone density and computed tomography assessment of the bones, benchtop biomechanical testing was conducted to compare the strength of the scaphoids after iliac and distal radius grafting, at 2-mm displacement, and at failure. RESULTS: Analysis of scaphoid length, width, height, weight, density, and screw placement revealed no statistical differences between both bone graft groups. Although not significant, scaphoid nonunions grafted with distal radius bone evidenced a reduced load (3.23 +/- 0.26 Nm) to 2-mm displacement compared with iliac crest bone (5.97 +/- 0.68 Nm). Similarly, though not significant, scaphoids grafted with distal radius bone showed a reduced load (4.18 +/- 0.30 Nm) to failure compared with iliac crest bone grafting (6.42 +/- 0.66 Nm). Although no significance was found between the 2 grafting methods, a trend toward greater strength in the iliac crest graft group was observed. CONCLUSIONS: Given the comparable biomechanical strength shown between iliac and distal radius bone in this study and the simplified surgical technique of distal radius harvesting, the data justify use of distal radius bone as a viable alternative donor source in scaphoid fracture treatment.     

颗粒打压植骨辅钢板内固定治疗股骨近端骨肿瘤或瘤样病损

目的 :评价颗粒打压植骨辅钢板内固定治疗股骨近端骨肿瘤或瘤样病损的临床可行性。方法 :2013年1月至2016年1月治疗股骨近端骨肿瘤或瘤样病损26例,均未发生病理性骨折,男12例,女14例;年龄8~62岁,平均34.2岁。病理结果:纤维结构不良11例,骨孤立性骨囊肿7例,骨巨细胞瘤3例,动脉瘤样骨囊肿3例,非骨化性纤维瘤1例,良性纤维组织细胞瘤1例。术前未进行病灶活组织检查,术后送慢病理,手术采取颗粒打压植骨辅钢板内固定。结果:26例均随访至恢复日常生活,随访时间8~42个月,平均25个月。参照骨与软组织肿瘤协会(MSTS)进行功能评估。术后末次复查股骨正侧位X线片,植骨边缘及植骨体部未见低密度影,植骨区骨愈合良好,所有患者未见复发及转移病灶,内固定物无松动、变形。髋关节功能恢复良好,所有患者无再骨折和畸形进展。结论:股骨近端肿瘤复发与病灶刮除植骨技术有关,刮除后采用化学、物理方法处理消灭残留的肿瘤细胞,利用此方法可以获得疾病的长期治愈,减少复发,恢复髋关节功能。     

Repair of long bone defects with demineralized bone matrix and autogenous bone composite

Background:

Repair of diaphyseal bone defects is a challenging problem for orthopedic surgeons. In large bone defects the quantity of harvested autogenous bone may not be sufficient to fill the gap and then the use of synthetic or allogenic grafts along with autogenous bone becomes mandatory to achieve compact filling. Finding the optimal graft mixture for treatment of large diaphyseal defects is an important goal in contemporary orthopedics and this was the main focus of this study. The aim of this study is to investigate the efficacy of demineralized bone matrix (DBM) and autogenous cancellous bone (ACB) graft composite in a rabbit bilateral ulna segmental defect model.

Materials and Methods:

Twenty-seven adult female rabbits were divided into five groups. A two-centimeter piece of long bone on the midshaft of the ulna was osteotomized and removed from the rabbits’ forearms. In group 1 (n=7) the defects were treated with ACB, in group 2 (n=7) with DBM, and in group 3 (n=7) with ACB and DBM in the ratio of 1:1. Groups 4 and 5, with three rabbits in each group, were the negative and positive controls, respectively. Twelve weeks after implantation the rabbits were sacrificed and union was evaluated with radiograph (Faxitron), dual-energy x-ray absorptiometry (DEXA), and histological methods (decalcified sectioning).

Results:

Union rates and the volume of new bone in the different groups were as follows: group 1 - 92.8% union and 78.6% new bone; group 2 - 72.2% union and 63.6% new bone; and group 3 - 100% union and 100% new bone. DEXA results (bone mineral density [BMD]) were as follows: group 1 - 0.164 g/cm², group 2 - 0.138 g/cm², and group 3 - 0.194 g/cm².

Conclusions:

DBM serves as a graft extender or enhancer for autogenous graft and decreases the need of autogenous bone graft in the treatment of bone defects. In this study, the DBM and ACB composite facilitated the healing process. The union rate was better with the combination than with the use of any one of these grafts alone.     

峡部植骨固定术治疗腰椎峡部裂

目的探讨峡部植骨固定术治疗腰椎峡部裂的临床疗效。方法自1998年12月~2005年8月应用峡部植骨固定术治疗腰椎峡部裂患者26例,经椎板AO空心拉力螺钉固定峡部裂7例,椎弓根螺钉合并椎板钩固定19例,峡部裂处均取髂骨植骨。术后3~6个月复查。术前及复查时采用VAS评分进行临床功能评价,摄腰椎双斜位和动力位X线片观察峡部愈合情况和椎间活动度变化。结果术前和随访时VAS评分分别为6.25±1.24、2.14±1.13,差异有显著统计学意义(P<0.01);椎间活动度分别为8.3°±2.4°、8.1°±2.1°,差异无统计学意义(P>0.05)。所有患者斜位X线片示峡部已经无透亮线。结论峡部植骨固定术是治疗腰椎峡部裂所致腰痛的一种合理、简单、安全的术式。     

一期原位骨延长技术治疗四肢火器伤骨缺损的研究

目的　探讨四肢火器伤骨缺损的治疗方法和一期原位骨延长技术的生物学基础。　方法　对犬肢体火器伤骨缺损模型分别采用一期原位骨延长和传统的后期骨移植两种方法治疗,比较其骨愈合的病理过程及局部微循环血流量的变化。　结果　两组动物骨折局部血流量无显著差别。一期原位骨延长组８ 周内骨延长长度为２８２ ±０９４ ｃｍ , 相对长度为１９３ ％ （１５８ ％ ～２１４ ％ ） 。其骨愈合时间明显比后期植骨组短,伤肢功能也较好。软骨内化骨是骨延长过程中主要的成骨形式。　结论　一期原位骨延长技术治疗火器伤骨缺损,在缩短疗程,简化操作等方面具有明显优越性,且对火器伤骨折的愈合过程和局部血液循环无明显不良影响。     

皮质外骨桥固定作用的实验研究

[目的]通过动物实验确定假体与骨交界区植骨能否有效形成皮质外骨桥固定,以及能否起到有效的辅助固定作用.[方法]杂种犬36只,随机均分为4组,右下肢股骨中段切除3 cm,插入特制假体替代骨缺损.4组动物分别采用珍珠面假体植骨固定、骨水泥植骨固定、珍珠面假体非植骨及骨水泥固定非植骨固定.4组动物随机于植入后6、12、20周分批处死,标本行组织学、X线摄影研究和生物力学研究.[结果]研究发现植骨区可有效形成紧密骨桥固定,多孔表面植骨组抗扭转应力较骨水泥固定非植骨组高.[结论]假体与宿主骨交界区可有效形成骨桥,此骨桥可有效加强假体的固定.     

自体骨修复初次全膝关节置换术中胫骨骨缺损的临床研究

目的为了探讨初次全膝关节置换术中自体骨修复胫骨平台骨缺损患者植骨处的骨密度变化及骨愈合情况,对自体骨修复胫骨平台骨缺损患者的随访探讨。方法收集2008年6月至2010年3月,在15例（16膝）初次全膝关节置换术中,采用自体骨移植的方法修复胫骨平台骨缺损的患者。对照组收集同期的14例（16膝）无骨缺损患者。应用X线拍片及双能X线骨密度仪（DEXA）观察术后6个月、12个月时胫骨假体下骨密度。分为3个兴趣区（ROI）,对各个区内平均骨密度变化进行观察和分析。结果术后6个月时胫骨平台骨缺损处ROI的骨密度：（0.967±0.320）g/cm2,对照组ROI的骨密度：（0.946±0.263）g/cm2;术后12个月时胫骨平台骨缺损处ROI的骨密度：（0.808±0.258）g/cm2,对照组ROI的骨密度：（0.806±0.262）g/cm2。术后12个月时胫骨平台骨缺损植骨处平均骨密度较6个月时均数略有下降,但无统计学差异（P〉0.05）;术后6个月与12个月时胫骨平台骨缺损自体骨植骨处平均骨密度较无骨缺损患者ROI的骨密度无显著性差异（P〉0.05）。结论自体骨修复胫骨平台骨缺损的全膝关节置换术后患者植骨处骨密度较无骨缺损患者的骨密度无明显变化,骨愈合情况良好。