目的:探讨股骨髁解剖钢板、L钢板及DCS在治疗股骨远端骨折中的应用价值。方法:采用股骨髁解剖钢板内固定治疗股骨远端骨折26例,L钢板内固定治疗股骨远端骨折32例, DCS内固定治疗股骨远端骨折21例。结果:79例经3～15月随访,其中采用解剖钢板26例中23例疗效满意,优良率为885％。采用L钢板32例中23例疗效满意,优良率为719％采用DCS 21例中17例疗效满意,优良率为809％。结论:解剖钢板内固定是治疗股骨远端骨折较为有效的方法,是预防膝关节并发症的积极措施。
Objective To assess the effectiveness of the new anterolateral approach of the distal femur for the treatment of distal femoral fractures. Methods Between July 2007 and December 2009, 58 patients with distal femoral fractures were treated by new anterolateral approach of the distal femur in 28 patients (new approach group) and by conventional approach in 30 patients (conventional approach group). There was no significant difference in gender, age, cause of injury, affected side, type of fracture, disease duration, complication, or preoperative intervention (P gt; 0.05). The operation time, intraoperative blood loss, intraoperative fluoroscopy frequency, hospitalization days, and Hospital for Special Surgery (HSS) score of knee were recorded. Results Operation was successfully completed in all patients of 2 groups, and healing of incision by first intention was obtained; no vascular and nerves injuries occurred. The operation time and intraoperative fluoroscopy frequency of new approach group were significantly less than those of conventional approach group (P lt; 0.05). But the intraoperative blood loss and the hospitalization days showed no significant difference between 2 groups (P gt; 0.05). All patients were followed up 12-36 months (mean, 19.8 months). Bone union was shown on X-ray films; the fracture healing time was (12.62 ± 2.34) weeks in the new approach group and was (13.78 ± 1.94) weeks in the conventional approach group, showing no significant difference (t=2.78, P=0.10). The knee HSS score at last follow-up was 94.4 ± 4.2 in the new approach group, and was 89.2 ± 6.0 in the conventional approach group, showing significant difference between 2 groups (t=3.85, P=0.00). Conclusion New anterolateral approach of the distal femur for distal femoral fractures has the advantages of exposure plenitude, minimal tissue trauma, and early function rehabilitation training so as to enhance the function recovery of knee joint.
Objective To review the research progress of the location marker of rotational alignment of the distal femur. Methods The recent literature concerning the location marker of rotational alignment of the distal femur at home and abroad was extensively reviewed and analyzed. Results Femoral prosthesis malrotational alignment could lead to some patellofemoral complications, such as dislocation of the patella, snapping, wear, and patellar pain. There are many methods to determining femoral component rotational alignment in the artificial total knee arthroplasty, including transepicondylar axis line, anterior posterior axis, the posterior condyles line, flexion gap balance technology, and computer navigation technology. Correct choice of the rotational alignment of the distal femur is crucial in reducing postoperative complications and the revision rate. Suitable reference axis is chosen during total knee arthroplasty to ensure the accuracy of the rotation axis of the femoral prosthesis, but it is currently still controversial. Conclusion The rotational alignment of the distal femur is an extremely important part to affect the prognosis of total knee arthroplasty. The methods to determine the rotational alignment of the distal femur need to be further improved.
Objective To analyze the effectiveness and application value of epiphysis preserving by the method of physeal distraction for treatment of femur osteosarcoma in children’s limb saving surgery. Methods Between January 2007 and January 2011, 6 patients with femur osteosarcoma underwent epiphysis preserving operation by physeal distraction. There were 4 males and 2 females with a mean age of 11.4 years (range, 9-14 years). The mean disease duration was 4.8 months (range, 1-9 months). The pathology confirmed osteosarcoma in all patients by core needle or open biopsy, including 1 case of osteogenic sarcoma, 1 case of chondroblastic osteogenic sarcoma, 1 case of osteoblastic osteogenic sarcoma, and 3 cases of no classified osteosarcoma. The clinical stage was IIA in 1 case and IIB in 5 cases according to the Enneking staging system. All patients received 2 cycles of neoadjuvant chemotherapy before operation. Then physeal distraction was performed for 4-7 days (mean, 5.7 days) based on Cantilde;adell technique. After 1-2 days of physeal distraction, massive allograft bones and interlocking intramedullary nails were used to reconstruct bone defect after tumor resection. All patients received another 4-6 cycles of chemotherapy and were followed up. Bone healing, limb discrepancy, and complications were recorded. Functional outcomes were assessed by the system of the Musculoskeletal Tumor Society (MSTS) and the range of motion (ROM) of both knee joints. Results Superficial infection occurred in 1 case and was cured after dressing change, and primary healing was obtained in the other patients. All 6 patients were followed up 2.5 years on average (range, 1-5 years). Symptoms of pain and swelling disappeared. No complication of allograft rejection, loosening or breaking of fixation occurred. No relapse or metastasis happened during follow-up. Bone healing was observed at the metaphysis junction in 5 cases at 6-9 months after operation and in 1 case at 14 months. Delayed union happened at the diaphysis junction in all patients. Different amount of callus formation was seen at the surface of diaphysis junction, but the fracture line remained clear at 12-48 months after operation. At last follow-up, limb discrepancy was 1-3 cm in 4 patients and 3-5 cm in 2 patients; 3 patients had compensatory scoliosis, and 2 patients had claudication. The MSTS score was 27.20 ± 1.92, showing significant difference (t= — 4.12, P=0.00) when compared with preoperative score (19.60 ± 2.74). The ROM of affected knee was (127.00 ± 17.89)°, showing no significant differences when compared with preoperative ROM (109.00 ± 12.45)° (t= — 1.84, P=0.10) and with ROM of normal knee (126.00 ± 9.62)° (t= — 0.11, P=0.92). Conclusion Limb saving surgery by physeal distraction can be used in young patients with open epiphyseal plate, which has the advantages of simple operation, good effectiveness, and less complications.
Objective To analyze the effect of the distal femoral flexion angle (DFFA) on the sagittal al ignment of femoral prosthesis and function recovery after total knee arthroplasty (TKA). Methods Between January 2007 and January 2009, 35 patients (35 knees) whose distal femoral flexion angle (DFFA) was more than 6° underwent TKA. Reference to the method by Oswald for DFFA measurement, 35 patients were divided into 2 groups: group A (n=23, 6° lt; DFFA lt; 12°, longintramedullary rod system) and group B (n=12, DFFA gt; 12°, short intramedullary rod system). Another random 30 osteoarthritis and 10 rheumatoid arthritis patients were selected as control group (group C, DFFA lt; 6°). The postoperative femoral prosthesis flexion angle (FPFA), knee society score (KSS), the femoral notch, and extension dysfunction were analyzed. Results All incisions healed by first intention. Seventy-five patients were followed up 1-3 years (mean, 2.1 years). The X-ray films showed that no signs of loosening, fracture, or infection were observed. There were significant differences in FPFA, the femoral notch, and knee extension dysfunction at 1 year after TKA between 3 groups (P lt; 0.05). The knee extension angle of group B was significantly larger than that of groups A and C (P lt; 0.05). There was no significant difference in the knee flexion angle and KSS score between 3 groups (P gt; 0.05). KSS score of postoperation was increased significantly when compared with preoperative values in 3 groups (P lt; 0.05). Conclusion Long intramedullary rod system in patients with higher DFFA usually leads to anterior femoral notch in TKA, so short intramedullary rods that can effectively avoid the notch should be selected in patients with DFFAgt; 12°. But when the femoral prosthesis would be in flexion position, extension dysfunction usually occurs.
Objective To investigate the efficacy of double-plating fixation via U-shaped incision in the treatment of type C3.3 distal femoral fractures. Methods From July 2006 to February 2009, 11 cases of type C3.3 distal femoral fractures were treated, including 5 open fractures and 6 closed fractures. Among them, there were 7 males and 4 females with an averageage of 43 years (range, 27-55 years). The locations were left side in 6 cases and right side in 5 cases. Fracture was caused by traffic accident in 8 cases and fall ing from height in 3 cases. The time from injury to hospital ization was 30 minutes to 7 days. After bone traction for 3 to 8 days, the operations were performed by double-plating fixation via U-shaped incision, and autograft of il iac bone or allogeneic bone grafting. Results The average time of operation was 128 minutes (range, 105-150 minutes). The average blood loss during operation was 344 mL (range, 290-380 mL). Shallow local skin flap necrosis occurred in 2 cases, and incision healed by first intention in others patients. All patients were followed up 22 months on average (range, 12-36 months). The bone union was achieved within 3-6 months (4.4 months on average). No implant loosening or refracture was found. According to Merchan et al criteria for knee joint function evaluation, the results were excellent in 4 cases, good in 5 cases, fair in 1 case, and poor in 1 case at last follow-up; the excellent and good rate was 81.8%. Conclusion The double-plating fixation via U-shaped incision has the advantages of better exposure, great convenience to manipulation, anatomical reduction, and rigid fixation. It provides an effective treatment for type C3.3 distal femoral fracture. However, its operation indications and operating instructions should be strictly followed.
Objective To investigate the effect factors of knee function recovery after operation in distal femoral fractures. Methods From January 2001 to May 2007, 92 cases of distal femoral fracture were treated. There were 50 males and 42 females, aged 20-77 years old (average 46.7 years old). Fracture was caused by traffic accident in 48 cases, by fall ing fromheight in 26 cases, by bruise in 12 cases and by tumble in 6 cases. According to Müller’s Fracture classification, there were 29 cases of type A, 12 cases of type B and 51 cases of type C. According to American Society of Anesthesiologists (ASA) classification, there were 21 cases of grade I, 39 cases of grade II, 24 cases of grade III, and 8 cases of grade IV. The time from injury to operation was 4 hours to 24 days with an average of 7 days. Anatomical plate was used in 43 cases, retrograde interlocking intramedullary nail in 37 cases, and bone screws, bolts and internal fixation with Kirschner pins in 12 cases. After operation, the HSS knee function score was used to evaluate efficacy. Ten related factors were appl ied for statistical analysis, to knee function recovery after operation in distal femoral fractures, such as age, sex, preoperative ASA classification, injury to surgery time, fracture type, treatment, reduction qual ity, functional exercise after operation, whether or not CPM functional training and postoperative compl ications. Results Wound healed by first intention in 88 cases, infection occurred in 4 cases. All patients followed up 16-32 months with an average of 23.1 months. Cl inical union of fracture was achieved within 3-7 months after operation. Extensor device adhesions and the scope of activities of lt; 80° occurred in 29 cases, traumatic arthritis in 25 cases, postoperative fracture displacement in 6 cases, mild knee varus or valgus in 7 cases and implant loosening in 6 cases. According to HSS knee function score, the results were excellent in 52 cases, good in 15 cases, fair in 10 cases and poor in 15 cases with an excellent andgood rate of 72.83%. Single factor analysis showed that age, preoperative ASA classification, fracture type, reduction qual ity, whether or not CPM functional exercise, and postoperative compl ications were significantly in knee function recovery (P lt; 0.05). logistic regression analysis showed that the fracture type, qual ity of reduction, whether or not CPM functional exercise, and age were major factors in the knee joint function recovery. Conclusion Age, preoperative ASA classification, fracture type, reduction qual ity, and whether or not CPM functional training, postoperative compl ications factors may affect the knee joint function recovery. Adjustment to the patient’s preoperative physical status, fractures anatomic reduction and firm fixation, early postoperative active and passive functional exercises, less postoperative compl ications can maximize the restoration of knee joint function.
Objective To assess the factors that affect the outcome of distal femoral fractures treated by retrograde intramedullary nail ing. Methods Between November 1999 and June 2006, 30 patients with 31 distal femoral fractures (15 males and 15 females, 1 bilateral) were treated by retrograde nail ing. Their ages ranged from 44 to 82 years old (average, 67.2 years old). The causes of injury were sl ipping downs in 17 patients, traffic accidents in 11, and fall ing from height in 2. Theaverage interval from injury to operation was 1.8 days. There were 14 cases of A1 fracture, 7 cases of A2, 8 cases of A3, and 2 cases of C1 according to AO/OTA classifications. The mean distance between the most distal l ine of the fracture and the intercondylar notch was 7.2 cm (range, 0-12 cm). Closed retrograde nail ing was done without reaming, and bone grafts were not done. Re sults The operation time averaged 76 minutes (range, 45-110 minutes). All patients were followed up for 19-69 months, and the mean follow-up duration was 27 months. Twenty-eight of 31 fractures united on the average of 14.7 weeks (range, 12-22 weeks). Compl ications occurred in 7 cases. There were 3 nonunions in AO-A3 fractures which were treated by changing implants or bone graft. Two patients suffered screw loosening of distal locking, that were re-fixed. Two patients showed l imited knee motion of less than 90 degrees flexion. There were no cases of deep infection, malunion over 10 degrees of angulation or 1 cm of shortening. A satisfactory outcome (excellent and good results) was achieved in 26 of 31 cases (84%), according to Schatzker and Lambert’s criteria. Poor results and compl ications were related to fractures of comminution and located within 5 cm from the intercondylar notch (Pearson Chi-square test, P=0.03). Other possible factors including age, kinds of nails used, associated injury, and numbers of distal locking screws were not related to the outcome and compl ication (Pearson Chi-square test, P gt; 0.05). Conclusion Retrograde nail ing may be a useful option for distal femoral fractures, but attention should be paid to comminuted fractures or fractures close to the knee joint.
To investigate the therapeutic effects and the related factors during operation of the less invasive stabilization systemdistal femur（LISSDF）for Types 33A3, C2 and C3 fractures classfied on the criteria by Association of Orthopedics (AO). Methods From August 2004 to December 2005, 26 patients with distal femoral fractures were surgically treated by LISSDF, including 9 patients with Type 33A3, 11 with Type 33C2, and 6 with Type 33C3. There were 15 males and 11 females, aged 3272 years (average, 55 years). The fractures occurred on the left side in 16 patients and on the right side in 10 patients. The fractures resulted from a road traffic accident in12 patients, a fall from the height in 9, and a crush injury in 5. Of the 26 patients, 3 had an open fracture (2 Gustilo Type Ⅰ,1 Gustilo Type ⅡA), with the mean time between the injury and the operation of 4 days (range, 6 h16 d).The operation through a lateral parapatellar incision and a transarticular retrograde plate of osteosynthesis (TARPO) was performed on 17 patients for Type33C2 and 33C3 fracture of the distal femur. The locking head screw (LHS) insertion through the stab incisions and monocortical fixation was performed on 9 patients for Type 33A3 fracture. Results The followup of all the patients for 12-26 months averaged 14.5 months revealed that the bone union was completed in all the 26 patients, 1 of whom had a delayed bone union. The X-ray films showed that the time for the bone union was 1136 weeks averaged 16.1weeks, and the time for the full weight loading was 1326 weeks averaged 17.6 weeks. Superficial infection developed in 1 patient, and the infection was curedafter the dressing changes. The internal fixator attachment was performed on 5 patients 613 months after operation, who had a serious pain in the lateral part of the distal femur. No deep infection，loosening of the internal fixation，breakage or failure of the implants was found in all the patients. Evaluated by the Merchant score system for the knee joint, of the 26 patients 13 achieved an excellent result, 11 achieved a good result, and 2 achieved a fair result, with 92.3% excellent and good results. Based on the Rasmussen criteria for the fracture reduction, the 26 patients had standard scores of 1219 with an average of 17.6; of the 26 patients, 16 had an excellent result, 9 had a good result, and 1 had a fair result. Conclusion The LISS is consistent with the principles of biological osteosynthesis on the design, and the system offers a new and effective internal fixation method for treatment of AO Types A3, C2 and C3 fractures. However, its operation indications and operating instructions should be strictly followed.