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find Author "殷渠东" 18 results
  • PROGRESS OF Masquelet TECHNIQUE TO REPAIR BONE DEFECT

    Objective To summarize the progress of Masquelet technique to repair bone defect. Methods The recent literature concerning the application of Masquelet technique to repair bone defect was extensively reviewed and summarized. Results Masquelet technique involves a two-step procedure. First, bone cement is used to fill the bone defect after a thorough debridement, and an induced membrane structure surrounding the spacer formed; then the bone cement is removed after 6-8 weeks, and rich cancellous bone is implanted into the induced membrane. Massive cortical bone defect is repaired by new bone forming and consolidation. Experiments show that the induced membrane has vascular system and is also rich in vascular endothelial growth factor, transforming growth factor β1, bone morphogenetic protein 2, and bone progenitor cells, so it has osteoinductive property; satisfactory results have been achieved in clinical application of almost all parts of defects, various types of bone defect and massive defect up to 25 cm long. Compared with other repair methods, Masquelet technique has the advantages of reliable effect, easy to operate, few complications, low requirements for recipient site, and wide application. Conclusion Masquelet technique is an effective method to repair bone defect and is suitable for various types of bone defect, especially for bone defects caused by infection and tumor resection.

    Release date:2016-08-31 04:05 Export PDF Favorites Scan
  • 钛网包裹自体松质骨打压植骨修复桡骨节段缺损一例

    目的介绍一种新的利用钛网包裹自体松质骨打压植骨修复桡骨节段缺损方法。 方法2011年10月,收治1例53岁机器击伤致左桡骨中下段开放粉碎性骨折合并5.4 cm桡骨缺损患者,待伤口愈合和局部皮肤条件改善后,二期采用切开复位钢板内固定和钛网包裹自体髂骨松质骨打压植骨修复桡骨节段骨缺损。 结果术后4个月见断端连续性骨痂连接、初步植骨融合表现,局部无压、叩痛,腕关节功能轻度受限,达临床愈合标准;术后6个月断端植骨融合更清晰,腕关节活动度接近正常,Green-O’Brien腕关节功能临床评分90分,为良;术后12个月末次随访,骨折愈合及腕关节功能临床评分无变化。 结论采用钛网包裹自体松质骨打压植骨修复桡骨节段缺损,不仅成骨快、愈合良好,且简便、安全。

    Release date:2016-08-31 04:06 Export PDF Favorites Scan
  • PROGRESS OF DIFFICULTY IN REMOVING OF LOCKING PLATE AND SCREW

    ObjectiveTo summarize the research progress of difficulty in removing of locking plate and screw. MethodsThe domestic and foreign related literature about difficulty in removing of locking plate and screw was reviewed. The incidence, the reason, preventive measure, removing method, and its advantages and disadvantages were summarized and analyzed. ResultsWith the popularization of locking plate application, cases with difficulty in removing locking screw have significantly increased compared with non-locking plate, so it has become a new clinical problem. The main reasons are stripping, cross-threading, and cold-welding. In recent years, for the difficulty in removing of locking plate and screw, some special extraction tools and new extraction methods have developed, but each has its defects and indications. ConclusionSufficient preoperative preparation, being familiar with its advantage and disadvantage as well as its indications are necessary. The specific situations of patient, including the reason, the screw, the plate, the incision, the bone quantity, and existing equipment, should be comprehensively considered to select appropriate methods.

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  • PROSPECTIVE RANDOMIZED CONTROLLED STUDY ON TREATMENT OF DISPLACED FEMORAL NECK FRACTURES WITH PERCUTANEOUS COMPRESSION PLATE

    ObjectiveTo compare the effectiveness of percutaneous compression plate (PCCP) and hollow compression screw in the treatment of displaced femoral neck fractures. MethodsBetween January 2010 and June 2014, 70 patients with displaced femoral neck fractures were randomly divided into 2 groups. After reduction, fracture was fixed with PCCP in 35 cases (group A) and with hollow compression screw in 35 cases (group B). There was no significant difference in the gender, age, cause, side and type of fractures, time from injury to operation, associated disease, pre-operative Harris score and visual analogue scale (VAS) score between 2 groups (P > 0.05). The operation time, intra-operative blood loss, fracture healing time, fracture reduction quality, time of rehabilitation and weightloading; complication, post-operative Harris score and post-operative VAS score were compared between 2 groups. ResultsThe incisions healed by first intention. All patients were followed up 13-34 months (mean, 23.7 months). There were significant differences in operation time, intra-operative blood loss, and fracture healing time between 2 groups (P < 0.05). There was no significant in the fracture reduction quality between 2 groups (P > 0.05). Avascular necrosis of the femoral head occurred in 2 cases of group A after operation (fracture reduction quality: grade IV); and avascular necrosis of the femoral head occurred in 4 cases of group B after operation (fracture reduction quality: grade I in 2 cases, grade Ⅱ in 1 case, grade Ⅲ in 1 case, and grade IV in 1 case), nonunion in 1 case, and screw loosening in 3 cases; and there was significant difference in the incidence of bone nonunion and avascular necrosis of the femoral head between 2 groups (χ2=-3.997, P=0.046). Difference was significant in fracture reduction quality in the patients with avascular necrosis of the femoral head and nonunion between 2 groups (χ2=1.991, P=0.047). The time of rehabilitation and weight-loading of group A was significantly earlier than that of group B (P < 0.05); the Harris and VAS scores of group A were significantly better than those of group B at 12 months after operation (P < 0.05). ConclusionPCCP for treatment of displaced femoral neck fractures has better static stability and better sliding dynamic pressure effect than hollow compression screw, and it can provide earlier rehabilitation and weight-loading postoperatively and obviously decrease the incidence of bone nonunion and avascular necrosis of the femoral head, but avascular necrosis of the femoral head still occur in patients with poor reduction or comminuted fracture.

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  • 微创附加钢板治疗下肢长骨骨折髓内钉固定术后肥大性骨不连

    目的 总结微创附加钢板治疗下肢长骨骨折髓内钉固定术后肥大性骨不连的可行性和效果。 方法 回顾分析 2010 年 1 月—2015 年 8 月采用微创附加钢板治疗的 11 例下肢长骨骨折髓内钉固定术后肥大性骨不连患者临床资料。男 8 例,女 3 例;年龄 18~63 岁,平均 34.6 岁。股骨 8 例,胫骨 3 例。原始骨折国际内固定研究协会(AO/ASIF)分型:A 型 5 例,B 型 4 例,C 型 2 例。髓内钉固定手术至本次手术时间为 6~22 个月,平均 12.4 个月。术前患者膝关节或踝关节活动度(range of motion,ROM)较对侧减少(30.71±14.72)°。 结果 手术切口均 Ⅰ 期愈合。11 例患者均获随访,随访时间 12~30 个月,平均 14 个月。X 线片示骨折均愈合,愈合时间 4~8 个月,平均 5.7 个月。无感染、神经血管损伤、钢板髓内钉断裂等并发症发生。末次随访时,患膝关节或踝关节 ROM 较对侧减少(15.36±12.17)°,与术前比较差异有统计学意义(t=5.571,P=0.000)。患肢功能恢复按 Schatzker-Lambert 股骨远端骨折功能评分或 Kaikkonen 踝关节损伤功能评分分级法,优 5 例,良 5 例,可 1 例,优良率 90.9%。 结论 微创附加钢板治疗下肢长骨骨折髓内钉固定术后肥大性骨不连,方法简便,安全可行,效果良好。

    Release date:2017-07-13 11:11 Export PDF Favorites Scan
  • Experimental study on the causes of spontaneous osteogenesis of Masquelet technique induced membrane

    ObjectiveTo investigate the causes of spontaneous osteogenesis of Masquelet technique induced membrane. MethodsForty-two male Sprague-Dawley rats aged 7-9 weeks were selected to establish a critical-sized bone defect of the right middle femur model. Then the rats were randomly divided into 4 groups, with 12 rats in groups A-C and 6 rats in group D. The bone defects in groups A-C were filled with vancomycin-loaded polymethyl methacrylate bone cement spacers. Then the Kirschner wires were used for intramedullary fixation in groups A and B, and the bone cement was used to connect the bone cement spacers and the bone ends in group B. The steel plate was used to fixation in group C. The bone defect in group D was only fixed with steel plate as a blank control group. The general condition was observed after operation. At 5 weeks after operation, 6 rats in groups A-C were selected for STRO-1 immunohistochemical staining to observe the content of mesenchyme stem cells (MSCs) in the induced membrane (STRO-1+ cells). At 12 weeks after operation, the remaining rats in groups A-D were taken for X-ray observation, gross observation, and histological observation (HE, safranin O-green staining) to observe the spontaneous osteogenesis of the membrane.Results All rats in the 4 groups survived until the completion of the experiment. At 5 weeks after operation, the immunohistochemical staining showed that group B was negative, while the contents of MSCs in the induced membrane in groups A and C were 14.20%±1.92% and 5.00%±0.71%, respectively, with a significant difference (P<0.05). At 12 weeks after operation, group A showed that the new bone formed at the osteotomy site and growth towards the center of the bone defect, with an average length of 3.1 mm on one side; and the presence of bone, cartilage lesions, fibers, and a small amount of neovascularization were observed in the induced membrane. Group C only had a small amount of new bone at the osteotomy site, and a small amount of neovascularization in the induced membrane. Groups B and D did not have any new bone, but bone resorption or atrophy at the osteotomy site. ConclusionAlthough the Masquelet technique induced membrane has osteogenesis, the key factor for the spontaneous osteogenesis is the bone marrow overflow from the bone marrow cavity providing MSCs. The spontaneous osteogenesis of the induced membrane belongs to endochondral ossification.

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  • PROCESSING STRATEGY OF DIFFICULT REMOVAL OF SCREWS IN PLATE

    ObjectiveTo investigate the countermeasures for difficult removal of screws in the plate. MethodsThe clinical data were retrospectively analyzed from 47 patients having difficult removal of screws in the plate between January 2004 and May 2014. There were 30 males and 17 females, aged 16-58 years (mean, 34 years). The time from internal fixation to removal of internal fixation was 10 months to 20 years (mean, 22 months). The locations of internal fixation were upper extremity in 25 cases and lower extremity in 22 cases. The number of difficult removal screws in the plate was 1 in 18 cases, 2 in 15 cases, 3 in 9 cases, and 4 in 5 cases. The plate types included general plate in 15 cases and locking plate in 32 cases; stainless steel plate in 10 cases and titanium plate in 37 cases. The reason for difficult removal, plate, screw, incision, and bone quality of patient were comprehensively analyzed, and different methods for difficult removal were chosen according to the principle that first simply then complicated. ResultsAll plates and screws were removed, and no iatrogenic fracture or nerve and vascular injuries occurred. The operation time was 65-270 minutes (mean, 125 minutes). The blood loss was 80-775 mL (mean, 157 mL). The postoperative drainage was 20-250 mL (mean, 92 mL). The incision healing by first intention was obtained in 39 cases, and delayed healing in 8 cases. The patients were followed up 3-24 months (mean, 10 months). No infection or re-fracture was observed. ConclusionThere are many countermeasures for difficult removal of screws in the plate, but each has indication. As long as a well arranged preoperative condition, mastering a variety of methods, and being familiar with its indication, as well as reasonably choosing method based on the specific situations, the plate and screw maybe smoothly removed.

    Release date:2016-08-25 10:18 Export PDF Favorites Scan
  • 创伤性腰椎椎弓根骨折二例报告

    目的总结创伤性腰椎椎弓根骨折(traumatic lumbar pedicle fracture,TLPF)的特点、诊断和治疗方法。 方法回顾分析2001年1月和2010年12月收治的2例TLPF男性患者临床资料,年龄51岁(例1)和29岁(例2);分别为腰部撞击致L5右侧TLPF伴双侧椎板和双侧横突骨折,摔倒致L4右侧TLPF伴左侧峡部不连。2例均有明显腰痛、腰部活动受限,不能站立,例1有短暂神经根刺激症状,例2无神经根刺激症状。X线片均未见明显椎弓根骨折,经CT检查确诊。例1采取L5、S1椎弓根螺钉固定、脊柱后外侧植骨融合术治疗,例2采取保守治疗。 结果例1术后6个月骨折愈合,植骨融合,腰痛基本消失;术后12个月恢复原工作,Oswestry功能障碍指数(ODI)评分由术前92%恢复至6%。例2治疗12个月后椎弓根骨折愈合,腰痛消失,恢复脊柱正常功能,ODI评分由治疗前60%恢复至4%。 结论TLPF临床罕见,主要因剪切力和扭转力暴力致伤,常规X线片检查易漏诊,需行CT或MRI检查确诊,根据具体情况采取手术或保守治疗,疗效满意。

    Release date:2016-08-31 04:05 Export PDF Favorites Scan
  • RESEARCH PROGRESS IN TREATMENT OF FRACTURES BY FAR CORTICAL LOCKING TECHNIQUE

    ObjectiveTo summarize the research progress in the treatment of fractures by far cortical locking technique. MethodThe domestic and foreign related literature about the treatment of fractures by far cortical locking technique was reviewed, summarized, and analyzed. ResultsIn order to overcome the shortcomings of high stress at the near side of the plate and high stiffness of traditional locking plate, a new far cortical locking technique has been developed recently. The structure retains the overall strength of locking plate, but decreases the stiffness of the fixation by 80%, so it can provide interfragmentary parallel micromotion and help to form symmetric callus, and satisfactory results have been achieved in theory, experiment, and clinical application of treatment of fractures by far cortical locking. ConclusionsThe far cortical locking technique is a major improvement of locking plate, which is expected to significantly reduce delayed healing and nonunion of some fractures treated with traditional locking plate.

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  • REPAIR OF LARGE TIBIAL BONE AND SOFT TISSUE DEFECTS BY SHORTENING-LENGTHENING METHOD

    Objective To investigate the effectiveness of shortening-lengthening method using Ilizarov technique for repairing large tibial bone and soft tissue defects. Methods Between January 2006 and December 2011, 12 patients with large tibial bone and soft tissue defects were treated by shortening-lengthening method using Ilizarov technique. There were 8 males and 4 females with an average age of 39.3 years (range, 18-65 years). The causes were injury in 8 cases and chronic infection in 4 cases. The area of soft tissue defect was 5 cm × 4 cm to 20 cm × 16 cm, and the length of tibial bone defect was 4.5-8.0 cm with an average of 6.2 cm. Results Incision in the lengthening area healed by first intention; healing of wounds by first intention was achieved in 6 cases, delayed healing in 2 cases, and secondary healing in 4 cases, with no common peroneal nerve injury. All patients were followed up 18-54 months with an average of 29 months. In the lengthening area, the bone healing time was 180-365 days (mean, 267 days), and the healing index was 3.8-4.3 days/mm (mean, 4.1 days/mm). In the shortening area, the bone healing time was 195-380 days (mean, 297 days) in the others except 1 case who was repaired with bone grafting. Mild pin-related infection and loosening were observed in all cases, but no infection occurred in the lengthening or shortening area. At last follow-up, weight bearing of the leg was fully recovered in 12 cases. According to Mazur’s criteria, the function of ankle was excellent in 2 cases, good in 6 cases, and fair in 4 cases. Nine patients had equal limb length, and 3 patients had shortened length less than 2 cm. Conclusion Shortening-lengthening method using Ilizarov technique has the advantages of simple surgery, less complications, easy to close the wound, and good effectiveness in repairing of large tibial bone and soft tissue defects.

    Release date:2016-08-31 10:53 Export PDF Favorites Scan
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