Zhongguo gu shang = China journal of orthopaedics and traumatology最新文献

{"title":"[Meta-analysis of the efficacy of plate fixation and external fixator fixation in the treatment of AO-C type distal radius fractures].","authors":"Guang-Yao Li, Yong-Zhong Cheng, Huan Liu, Jun-Jie Jiang, Yong-Yao Li, Yang Chen, Yu-Xiang Yao","doi":"10.12200/j.issn.1003-0034.20240557","DOIUrl":"10.12200/j.issn.1003-0034.20240557","url":null,"abstract":"<p><strong>Objective: </strong>Meta-analysis of the clinical efficacy of plate and external fixator fixation in the treatment of AO-C type distal radius fractures.</p><p><strong>Methods: </strong>PubMed, Embase, Cochrane Medical Library, Web of Science, CNKI, Wanfang, VIP and SinoMed databases were searched for all literature on randomized controlled clinical trials of AO-C distal radius fractures. The search time limits were from each database. The database will be established until June 30, 2023. The included studies were extracted according to the Cochrane Handbook (Version 6.3, 2022) for information extraction and literature quality evaluation. RevMan 5.4 was used to evaluate the risk of Publication bias, test heterogeneity and Perform Meta-analysis. The outcome indicators were:imaging anatomy indicators (volar inclination angle, ulnar deviation angle, radial height), wrist joint mobility (flexion, extension, rotation, ulnar deviation), complication rate, and comparison of surgical treatments (operative blood loss, operation time, hospitalization time, fracture healing time) and wrist joint function scores and related scales.</p><p><strong>Results: </strong>(1) A total of 28 studies were included, with a total of 2 192 patients, including 1 096 cases in the plate internal fixation group and 1 096 cases in the external fixation group.(2) Meta analysis results showed:the surgical treatment situation of the external fixation group:surgical blood loss <i>MD</i>=-37.93, 95%<i>CI</i>(-48.54, -27.31), <i>P</i><0.000 01;operation time <i>MD</i>=-31.58, 95%<i>CI</i>(-48.96, -14.20), <i>P</i><0.000 4;hospitalization time <i>MD</i>=-4.58, 95%<i>CI</i>(-5.44, -3.71), <i>P</i><0.000 01;the fracture healing time <i>MD</i>=-0.88, 95%<i>CI</i>(-1.35, -0.41), <i>P</i><0.000 2, which were significantly better than that of the plate internal fixation group(<i>P</i><0.05).(3) The two groups:palmar inclination angle <i>MD</i>=-0.17, 95%<i>CI</i>(-0.95, 0.61), <i>P</i>=0.68;ulnar declination <i>MD</i>=0.22, 95%<i>CI</i>(-0.73, 1.17), <i>P</i>=0.65, radial height <i>MD</i>=-0.24, 95%<i>CI</i>(-1.15, 0.67), <i>P</i>=0.60;flexion and extension <i>MD</i>=-5.63, 95%<i>CI</i>(-11.85, 0.58), <i>P</i>=0.08;rotation <i>MD</i>=-5.80, 95%<i>CI</i>(-12.77, 1.17), <i>P</i>=0.10, radioulnar deviation <i>MD</i>=-2.86, 95%<i>CI</i>(-10.87, 5.15), <i>P</i>=0.48;complication rate <i>RR</i>=0.96, 95%<i>CI</i>(0.63, 1.46), <i>P</i>=0.83;Gartland-Werley clinical wrist score <i>MD</i>=0.13, 95%<i>CI</i>(-0.80, 1.06), <i>P</i>=0.78;excellent and good rate of Gartland-Werley wrist clinical score <i>RR</i>=0.93, 95%<i>CI</i>(0.87, 1.01), <i>P</i>=0.08;excellent and good rate of Cooney wrist score <i>RR</i>=0.99, 95%<i>CI</i>(0.62, 1.59), <i>P</i>=0.98;wrist DASH score <i>MD</i>=-4.67, 95%<i>CI</i>(-14.96, 5.62), <i>P</i>=0.37;the differences were not significant (<i>P</i>>0.05).</p><p><strong>Conclusion: </strong>Compared with internal fixation with plate, external fixation can significan","PeriodicalId":23964,"journal":{"name":"Zhongguo gu shang = China journal of orthopaedics and traumatology","volume":"38 1","pages":"66-80"},"PeriodicalIF":0.0,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143029392","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Guiding significance of intra-articular sagittal reduction in the treatment of tibial plateau fractures].","authors":"Jia-Fan Zhang, An-Hua Long, Da-Cheng Han, Zi-Chao Jia, Ya-Kui Zhang","doi":"10.12200/j.issn.1003-0034.20240268","DOIUrl":"10.12200/j.issn.1003-0034.20240268","url":null,"abstract":"<p><p>Tibial plateau fracture is a fracture involving the proximal articular surface of the tibia, and its injury mechanism is complex, the fracture morphology is different, and it is often accompanied by different degrees of soft tissue injury, which is difficult to diagnose and treat. In recent years, the research hotspot has focused on solving the reduction and fixation of the posterior lateral column of the tibial plateau, because it has been clinically found that the residual sagittal plane after tibial plateau fracture is insufficient reduction or loss of reduction leads to knee joint dysfunction. The posterior inclination angle of the tibial plateau is an important parameter to describe the sagittal alignment of the tibia. In the natural state, the posterior tibial slope(PTS) is altered to involve the soft tissues around the knee joint such as anterior cruciate ligament(ACL) and posterior cruciate ligament(PCL), which affects the stability of the knee joint. In total knee arthroplasty(TKA), choosing the appropriate PTS can effectively increase the prosthesis survival rate, improve the flexion and extension knee efficacy, which is beneficial to knee joint stability. In the field of orthopedic trauma, correction of sagittal deformity is equally important, following the principle of \"reverse mechanism of injury\". Quantitative evaluation of postoperative sagittal realignment of tibial plateau fractures and investigation of the effect of sagittal realignment on long-term outcomes and complications are still poorly understood and require further clinical and biomechanical studies.</p>","PeriodicalId":23964,"journal":{"name":"Zhongguo gu shang = China journal of orthopaedics and traumatology","volume":"38 1","pages":"100-4"},"PeriodicalIF":0.0,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143029376","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Zero-incision treatment of supracondylar humeral fractures in extremely unstable Gartland type Ⅳ children by percutaneous prying combined with modified rotary reduction with Kirschner wire].","authors":"Qiang Sun, Ying Zhou, Wei Chen, Bo Ren, Xing-Kun Liu","doi":"10.12200/j.issn.1003-0034.20230481","DOIUrl":"10.12200/j.issn.1003-0034.20230481","url":null,"abstract":"<p><strong>Objective: </strong>To investigate the clinical efficacy of percutaneous prying combined with modified rotary reduction with needle in the treatment of supracondylar fracture of humerus in Gartland type Ⅳ children, and to evaluate the postoperative elbow joint function, the incidence of elbow varus deformity and the application prospect of this technique.</p><p><strong>Methods: </strong>A total of 98 children diagnosed with Gartland type Ⅳ supracondylar humeral fractures between June 2020 and January 2023 were included in this study, comprising of 57 males and 41 females. The age ranged from 2 to 14 years old with an average of (6.24±4.76) years old. There were 48 cases on the left side and 50 on the right side. The time interval from injury to surgery ranged from 2 hours to 2 days, and emergency operation was performed in 26 cases. During the operation, the Kirschner wire was inserted bluntly into the broken end of the fracture using the lever principle, and the reduction was performed by percutaneous prying. Then the modified rotary reduction method with kirschner wire was used to close and reset the Kirschner wire internal fixation, and zero incision was achieved in all cases. Flynn score was used to evaluatal the function and appearance of the elbow joint at 6 months after operation.</p><p><strong>Results: </strong>The operation was successfully completed by all 98 children, and they were followed up for a duration from 6 to14 months with an average of (9.82±3.51) months. The fractures in all cases healed, the time ranged from 6 to 8 weeks with an average of (6.72±1.17) weeks. The Flynn function score of the elbow joint was rated as excellent in 95 cases and good in 3 cases at the 6-month postoperative evaluation. No related complications occurred, such as cubitus varus deformity, osteofascial compartment syndrome, Kirschner wire rupture or rejection, iatrogenic vascular and nerve injury, Volkmann's contracture or ossification myositis.</p><p><strong>Conclusion: </strong>Percutaneous pry extraction combined with modified rotary reduction with needle in the treatment of humeral supracondylar fracture in extremely instability Gartland type Ⅳ children has the advantages of zero incision, little trauma, safety and good efficacy, and minimization of surgical trauma and scar formation. The postoperative elbow joint function recovery is good.</p>","PeriodicalId":23964,"journal":{"name":"Zhongguo gu shang = China journal of orthopaedics and traumatology","volume":"38 1","pages":"92-6"},"PeriodicalIF":0.0,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143029648","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Preliminary application of human-computer interaction CT imaging AI recognition and positioning technology in the treatment of type C1 distal radius fractures].","authors":"Yong-Zhong Cheng, Xiao-Dong Yin, Fei Liu, Xin-Heng Deng, Chao-Lu Wang, Shu-Ke Cui, Yong-Yao Li, Wei Yan","doi":"10.12200/j.issn.1003-0034.20240601","DOIUrl":"10.12200/j.issn.1003-0034.20240601","url":null,"abstract":"&lt;p&gt;&lt;strong&gt;Objective: &lt;/strong&gt;To explore the accuracy of human-computer interaction software in identifying and locating type C1 distal radius fractures.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Methods: &lt;/strong&gt;Based on relevant inclusion and exclusion criteria, 14 cases of type C1 distal radius fractures between September 2023 and March 2024 were retrospectively analyzed, comprising 3 males and 11 females(aged from 27 to 82 years). The data were assigned randomized identifiers. A senior orthopedic physician reviewed the films and measured the ulnar deviation angle, radial height, palmar inclination angle, intra-articular step, and intra-articular gap for each case on the hospital's imaging system. Based on the reduction standard for distal radius fractures, cases were divided into reduction group and non-reduction group. Then, the data were sequentially imported into a human-computer interaction intelligent software, where a junior orthopedic physician analyzed the same radiological parameters, categorized cases, and measured fracture details. The categorization results from the software were consistent with manual classifications (6 reduction cases and 8 non-reduction cases). For non-reduction cases, the software performed further analyses, including bone segmentation and fracture recognition, generating 8 diagnostic reports containing fracture recognition information. For the 6 reduction cases, the senior and junior orthopedic physicians independently analyzed the data on the hospital's imaging system and the AI software, respectively. Bone segments requiring reduction were identified, verified by two senior physicians, and measured for displacement and rotation along the X (inward and outward), Z (front and back), and Y (up and down) axes. The AI software generated comprehensive diagnostic reports for these cases, which included all measurements and fracture recognition details.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Results: &lt;/strong&gt;Both the manual and AI software methods consistently categorized the 14 cases into 6 reduction and 8 non-reduction groups, with identical data distributions. A paired sample t-test revealed no statistically significant differences (&lt;i&gt;P&lt;/i&gt;&gt;0.05) between the manual and software-based measurements for ulnar deviation angle, radial ulnar bone height, palmar inclination angle, intra-articular step, and joint space. In fracture recognition, the AI software correctly identified 10 C-type fractures and 4 B-type fractures. For the 6 reduction cases, a total of 24 bone fragments were analyzed across both methods. After verification, it was found that the bone fragments identified by the two methods were consistent. A paired sample t-tests revealed that the identified bone fragments and measured displacement and rotation angles along the X, Y, and Z axes were consistent between the two methods. No statistically significant differences(&lt;i&gt;P&lt;/i&gt;&gt;0.05) were found between manual and software measurements for these parameters.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Conclusion: &lt;/strong&gt;Human-comput","PeriodicalId":23964,"journal":{"name":"Zhongguo gu shang = China journal of orthopaedics and traumatology","volume":"38 1","pages":"31-40"},"PeriodicalIF":0.0,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143029354","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[A preliminary study of risk factors for the stress fracture in treated with clavicle hook plate].","authors":"Peng-Fei Nie, Yuan-Lin Xu, Yong-Fu Li, Lun Zhang, Qian-Qian Zhou, Jian-Nyu Luo, Jian Guo","doi":"10.12200/j.issn.1003-0034.20230132","DOIUrl":"10.12200/j.issn.1003-0034.20230132","url":null,"abstract":"<p><strong>Objective: </strong>To investigate the effects of bone density, plate bending degree and proximal screw type on the stress fracture of clavicle hook.</p><p><strong>Methods: </strong>Three sows weighing between 45 and 50 kg were selected, from which a total of 40 rivs were collected. The 15 ribs of sows were divided into 3 groups according to bone density and bone hardness with 5 rivs in each group. And then the 3 groups were fixed with 6-hole collarbone hook plates and 3 locking screws. Measure the maximum torsion force when the ribs were fractured by force. The same size 15 rids were divided into 3 groups, named forward bending group, 0° group(the angle between the plate surface and the rib surface) and reverse bending group. All fixed with 6-hole collarbone hook plates and locking screws to measure the maximum torsion force of rib stress fracture. Then the same size 10 rids were divided into 2 groups, the normal screw group and the locking screw group with 5 ribs in each group. Both groups were fixed with 6-hole collarbone hook plates and screws. The normal screw group was a normal screw, fixed in proximal end, and two locking screws. The locking screw group was fixed by locking screws. Measure the maximum torsion force of the two groups when the ribs fracture by force.</p><p><strong>Results: </strong>In the bone density experiment, the torque force of hard bone group (104.51±6.27) N was greater than the normal bone group (75.04±3.81) N(<i>t</i>=8.979, <i>P</i><0.05). The force of normal bone group was greater than the osteoporosis group (49.99±2.12) N(<i>t</i>=12.832, <i>P</i><0.05). In the bending collarbone hook experiment, the order of the torque force generated by each group as follow:the forward bending group (343.59±6.18) N greater than the 0° group (106.01±5.29) N(<i>t</i>=65.279, <i>P</i><0.05) greater than the reverse bending group (95.82±4.12) N(<i>t</i>=3.398, <i>P</i><0.05). The force of the normal screw group (98.68±0.70) N was greater than the locking screw group (50.20±0.95) N(<i>t</i>=91.484, <i>P</i><0.05). The data comparisons of each group were statistically significant.</p><p><strong>Conclusion: </strong>Bone density, plate bending degree and proximal screw type had an impact on stress fracture of clavicle hook plate. Higher bone density, forward bending of the steel plate, and ordinary screws in proximal end can reduce the rates of stress fractures of clavicle hooks.</p>","PeriodicalId":23964,"journal":{"name":"Zhongguo gu shang = China journal of orthopaedics and traumatology","volume":"38 1","pages":"61-5"},"PeriodicalIF":0.0,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143029768","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Immediate metatarsal lengthening for congenital brachymetatarsia].","authors":"Bo-Lai Wu, Xiao-Jun Wang, Zhi-Min Ma, Le-Bin Wu, Zi-Hao Lu","doi":"10.12200/j.issn.1003-0034.20230136","DOIUrl":"https://doi.org/10.12200/j.issn.1003-0034.20230136","url":null,"abstract":"<p><strong>Objective: </strong>To explore clinical efficacy of congenital brachymetatarsia with immediate metatarsal lengthening.</p><p><strong>Methods: </strong>From March 2015 to December 2020, 7 patients with brachymetatarsia were treated, including 6 females and 1 male;aged range from 18 to 30 years old;there were 5 patients with metatarsal microsomia on one foot, 2 patients with metatarsal microsomia on the first and fourth right foot, and immediate extension of metatarsal microsomia on the first and fourth right foot;two patients were short metatarsal bones of both feet. The length of short metatarsal bone, length of normal metatarsal bone, distance of short metatarsal bone and healing of bone graft were observed before and 12 months after operation. American Orthopaedic Foot and Ankle Society (AOFAS) scores were used to evaluate clinical efficacy and observe complications.</p><p><strong>Results: </strong>Seven patients were followed up for 12 to 24 months. All metatarsal bones were extended to satisfactory length and bone graft were healed completely. Metatarsal length and shortening distance were improved from 3.55 to 5.90 cm and 0.77 to 1.46 cm before operation to 4.31 to 6.87 cm and 0.04 to 0.57 cm at 12 months after operation. Postoperative X-ray of the affected foot at 12 months showed bone healing was achieved between metatarsal bone and bone graft in 7 patients, and the parabolic shape of the distal metatarsal bone recovered after operation. AOFAS scores improved from 40 to 70 before operation to 88 to 95 points at 12 months after operation, and 6 patients were excellent and 1 good.</p><p><strong>Conclusion: </strong>Immediate extension of metatarsal bone for congenital brachymetatarsia, the transplanted bone grew well during the process of bone grafting healing, the occurrence of bone nonunion was reduced, the short metatarsal bone was restored to a satisfactory length, and the toe function restored well.</p>","PeriodicalId":23964,"journal":{"name":"Zhongguo gu shang = China journal of orthopaedics and traumatology","volume":"37 12","pages":"1208-12"},"PeriodicalIF":0.0,"publicationDate":"2024-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142882902","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Effect of percutaneous acupoint electrical stimulation on immune function and postoperative recovery in patients with total knee arthroplasty].","authors":"Xiao-Ting Lu, Rong-Rong Duan, Xiao-Yu Qin, Wei-Hua Huang, Sheng-Shuang Ding, Jie Zhang, Chun-Ai Wang","doi":"10.12200/j.issn.1003-0034.20221026","DOIUrl":"https://doi.org/10.12200/j.issn.1003-0034.20221026","url":null,"abstract":"<p><strong>Objective: </strong>To evaluate clinical effect of transcutaneous acupoint electrical stimlation (TEAS) on perioperative immune function and postoperative recovery in patients with total knee arthroplasty (TKA).</p><p><strong>Methods: </strong>From November 2021 to July 2022, 80 patients with unilateral TKA were selected and divided into TEAS group and sham TEAS group according to different treatment methods. There were 40 patients in TEAS group, including 9 males and 31 females;aged from 61 to 79 years old with an average of (66.90±5.86) years old;body mass index (BMI) ranged from 19.53 to 30.47 kg·m^-2 with an average of (25.34±2.83) kg·m^-2;21 patients on the left side, 19 patients on the right side;according to American Society of Anesthesiologists (ASA), 30 patients with gradeⅡ, 10 patients with grade Ⅲ;TEAS were administered at the bilateral <i>Hegu</i> (LI4), Neiguan (PC6) and non-operative <i>Zusanli</i> (ST36) and <i>Sanyinjiao</i> (SP6) points from 30 min before anesthesia to the end of operation, the frequency was 2/10 Hz, current intensity was tolerable and/or muscle rhythmic twitches of limbs were performed. There were 40 patients in sham TEAS group, including 9 males and 31 females;aged from 60 to 80 years old with an average of (67.35±4.29) years old;27 patients on the left side and 13 patients on the right side;BMI ranged from 20.02 to 30.09 kg·m^-2 with an average of (25.02±2.23) kg·m^-2;28 patients with gradeⅡand 12 patients with grade Ⅲ according to ASA;Electrodes were attached to the same points without electrical stimulation. Percentage contents of 24 h CD3+, CD4+, CD8+ and NK cells, postoperative infection, incidence of nausea, vomiting, abdominal distension and pruritus within 48 h after surgery, the first time on the ground, length of hospital stay and quality of recovery-15 (QoR-15) score were compared between two groups.</p><p><strong>Results: </strong>Compared with pseudoteas group, expressions of CD3+ and CD4+ T lymphocytes in TEAS group were significantly increased at 24 h after surgery (<i>P</i><0.05). The incidence of nausea within 48 h after surgery and the time spent on the ground early after surgery were significantly decreased (<i>P</i><0.05). There was no significant difference in postoperative secondary infection, adverse reactions such as vomiting, abdominal distension, pruritus and hospitalization days (<i>P</i>>0.05).</p><p><strong>Conclusion: </strong>Percutaneous acupoint electrical stimulation could improve perioperative cellular immunity in patients with total knee replacement, alleviate immunosuppression, reduce incidence of postoperative adverse reactions, and promote early postoperative recovery.</p>","PeriodicalId":23964,"journal":{"name":"Zhongguo gu shang = China journal of orthopaedics and traumatology","volume":"37 12","pages":"1213-8"},"PeriodicalIF":0.0,"publicationDate":"2024-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142882933","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Finite element analysis of influence of humerus torque screw tip distance on stability of proximal humeral fracture plate fixation].","authors":"Chen Zhou, Cheng Chen, Rui Cao, Hong-Wang Guo, Chen-Yi Huang, Liang Yan, Wei-Hua Xue","doi":"10.12200/j.issn.1003-0034.20230590","DOIUrl":"https://doi.org/10.12200/j.issn.1003-0034.20230590","url":null,"abstract":"<p><strong>Objective: </strong>To explore changes of humerus torque screw tip distance on stability of proximal humeral internal locking system (PHILOS) by finite element analysis, in order to provide reference for selection of intraoperative plant size.</p><p><strong>Methods: </strong>The proximal humerus 3D model was constructed based on Synbone artificial bone model in 3D engineering drawing software, and the corresponding 3D model was constructed based on PHILOS bone plate contour. The model was modified to simulate comminuted proximal humerus fracture, and the operation model was simulated after fracture, and the fixed operation model was assembled, the apex distance of humerus moment screw was set as 4, 8, 12 and 16 mm respectively. The axial and torsional loads were applied under the conditions of vertical downward and 20° abduction respectively, and the maximum displacement of humeral head and the peak stress of cortical bone and cancellous bone of humeral head were calculated under the corresponding working conditions, respectively, to evaluate influence of screw tip distance change on the risk of humeral head varus after PHILOS plate fixation.</p><p><strong>Results: </strong>The peak displacement of humerus head did not generally increase with the increase of torque screw tip distance. On the contrary, the peak displacement of humerus head decreased slightly in all working conditions with the gradual increase of torque screw tip distance. At 20° abduction, the maximum displacement of humerus head was significantly higher in all models than that under vertical loading. At the same time, the lengthening of tip distance of torque screw did not lead to significant stress concentration of the humerus head after operation. The peak stress of cancellous bone decreased gradually with the extension of the peak distance of humerus moment screw, while the peak stress of cortical bone increased first and then decreased. When the peak distance was 12 mm, the peak stress of cortical bone was the largest under all working conditions, and then decreased with the further extension of the peak distance.</p><p><strong>Conclusion: </strong>In the case of a small humeral head interlocking screw tip distance(less than 4 mm), increasing the humeral torque screw tip distance does not lead to a significant loss of stability after PHILOS plate fixation and a significant increase in the risk of postoperative complications.</p>","PeriodicalId":23964,"journal":{"name":"Zhongguo gu shang = China journal of orthopaedics and traumatology","volume":"37 12","pages":"1202-7"},"PeriodicalIF":0.0,"publicationDate":"2024-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142882938","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Analysis of risk factors for postoperative functional recovery of fractures around knee joint].","authors":"Yan Zheng, Lin-Rui Peng, Hua-Guo Zhao","doi":"10.12200/j.issn.1003-0034.20210886","DOIUrl":"https://doi.org/10.12200/j.issn.1003-0034.20210886","url":null,"abstract":"<p><strong>Objective: </strong>To screen factors independently affect functional recovery of fracture around knee joint by analyzing risk factors of fracture around knee joint (FAKJ) in minors.</p><p><strong>Methods: </strong>Clinical data of 364 FAKJ patients were collected from June 2017 to June 2019, and Logistic regression was performed for single-factor and multivariate analysis. Possible risk factors were included, such as age, gender, residential environment, guardianship relationship, causes of injury , fracture type, fracture treatment modality, duration of braking, presence of rehabilitation physician's guidance, and compliance of the affected person. Univariate and multifactorial analyses were performed to select risk factors affecting FAKJ. Poor recovery from FAKJ was defined as the presence of pain, reduced joint motion, or claudication in one of the affected limbs during follow-up period.</p><p><strong>Results: </strong>Fifty-one patients out of 364 FAKJ patients presented with poor recovery, with an incidence of 14.01%, 35 patients (9.61%) with limited knee motion, 10 patients (2.75%) with knee pain, 5 patients (1.37%) with functional claudication, and 1 patient (0.27%) with re-fracture. Univariate analysis revealed statistically significant differences in ages, type of fracture braking time and affected party compliance between two groups(<i>P</i><0.05). Analysis result showed age was greater than or equal to 7 years old[<i>OR</i>=1.512, 95%<i>CI</i>(1.019, 2.118), <i>P</i><0.05], proximal tibial fracture[<i>OR</i>=3.813, 95%<i>CI</i> (3.189, 5.334), <i>P</i><0.05], braking time above 4 weeks [<i>OR</i>=1.299, 95%<i>CI</i>(1.081, 8.418), <i>P</i><0.05], and poor compliance[<i>OR</i>=1.282, 95%<i>CI</i>(1.119, 3.921), <i>P</i><0.05] were risk factors for FAKJ.</p><p><strong>Conclusion: </strong>Age was greater than or equal to 7 years old, proximal tibvial fracture, braking time was greater than or equal to 4 weeks, and patient poor compliance are risk factors that influence functional recovery of patients with FAKJ and may help clinical care to screen high-risk patients as well as to develop individualized treatment plans.</p>","PeriodicalId":23964,"journal":{"name":"Zhongguo gu shang = China journal of orthopaedics and traumatology","volume":"37 12","pages":"1219-23"},"PeriodicalIF":0.0,"publicationDate":"2024-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142882817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"[Biomechanical study of load-bearing stability of Pilon fracture fixed with external fixator].","authors":"Yong-Zhong Cheng, Xiao-Dong Yin, Yang Chen, Chao-Lu Wang, Guang-Wei Liu, Chang-Long Shi, Xiao-Yu Huang, Yi-Li Chen, Hong-Ying Chen, Xiong-Wei Wang, Ji-Yang Zhao","doi":"10.12200/j.issn.1003-0034.20230702","DOIUrl":"https://doi.org/10.12200/j.issn.1003-0034.20230702","url":null,"abstract":"&lt;p&gt;&lt;strong&gt;Objective: &lt;/strong&gt;To explore weight-bearing stability of Pilon fracture fixed by external fixator.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Methods: &lt;/strong&gt;Six ankle bone models (right side) and 4 pairs (8 ankle cadaver specimens) were selected. Pilon fracture model was prepared by using the preset osteotomy line based on Ruedi Allgower Pilon fracture type. Pilon fracture model was built by using a minimally invasive osteotomy. After ankle bone model and cadaver specimen model were fixed with external fixator, axial load was carried out on mechanical loading machine. After ankle bone model and cadaver specimen model were fixed with external fixator, axial load was carried out on mechanical loading machine. Axial loads of 150, 300 and 450 N were applied to ankle bone model, and displacements of fibula fracture blocks, lateral tibia fracture blocks and medial tibia fracture blocks in three-dimensional space (X, Y and Z axes) were recorded by dynamic capture instrument. Axial loads of 300, 600 and 900 N were applied to ankle cadaver model fixed by external fixator. X-ray films of Pilon fracture cadaver model fixed by external fixator under different loading conditions were taken. The anterior tibial angle, tibial malleolar point angle, talus shift value, talus tilt angle, lateral malleolar shift value, lateral malleolar shift value, medial malleolar separation shift value and articular surface step displacement value were measured under different loads by digimizer software.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Results: &lt;/strong&gt;After 150, 300 and 450 N axial loads were applied to Pilon fracture models fixed by external fixator, no loosening or fracture of external fixator was observed, and no loosening, fracture or irreversible plastic deformation of Kirschner needle were observed. The displacement values of fibular fracture pieces on X-axis(around) were 0.032 (-0.022, 0.269), 0.061 (-0.002, 0.427), 0.212(-0.016, 1.223) mm, and the displacement values on Y-axis(above and below) were 0.002(-0.031, 0.103), 0.051(-1.133, 0.376), 0.128 (-1.394, 0.516) mm, and displacement values on Z-axis (front and rear) were -0.003 (-0.130, 0.171), 0.137 (-0.076, 0.433), 0.030(-0.487, 0.478) mm;the displacement values of lateral tibial fractures on X-axis were 0.000(-0.108, 0.027), 0.083(-0.364, 0.050), -0.121(-0.289, 0.165) mm, and displacement values on Y-axis were -0.009(-0.200, 0.025), -0.179(-0.710, 0.084), -0.257(-0.799, 0.027) mm, and displacement values on Z-axis were 0.112(-0.024, 0.256), 0.157(-0.068, 0.293), -0.210(-0.035, 0.430) mm;the displacement values of medial tibial fracture block on X-axis were -0.010(-0.060, 0.013), -0.165(-0.289, 0.056), -0.181(-0.395, 0.013) mm, and the displacement values on Y-axis were -0.036(-0.156, 0.007), -0.104(-0.269, 0.178), -0.245(-0.380, -0.011) mm, and displacement values on Z-axis were -0.005(-0.372, 0.189), -0.012 (-1.774, 0.380), 0.200 (-1.963, -0.540) mm. After 300, 600 and 900 N axial loads were applied to Pilon fracture cadaverous models fixed wi","PeriodicalId":23964,"journal":{"name":"Zhongguo gu shang = China journal of orthopaedics and traumatology","volume":"37 12","pages":"1196-201"},"PeriodicalIF":0.0,"publicationDate":"2024-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142882833","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}