external fixator

外部固定器
  • 文章类型: Journal Article
    背景:移位的跟骨关节内骨折(DIACF)的治疗存在争议。这项研究比较了切开复位内固定(ORIF)与微创骨固定(MIOS)。方法:我们对2018年1月至2022年9月治疗的70例DIACF患者进行了回顾性研究,分为ORIF组(n=50)和MIOS组(n=20)。使用马里兰足评分(MFS)和Creighton-Nebraska健康基金会评估量表(CNHFAS)评估功能结果。射线照相结果,并发症发生率,并评估了再干预率。卡方分析检查了Sanders分类与治疗选择之间的相关性。结果:卡方分析显示骨折的复杂性与所选择的治疗类型之间没有显着相关性(χ2=0.175,p=0.916)。此外,趋势的Cochran-Armitage检验显示,基于骨折复杂性的治疗选择没有显着趋势(统计量=0.048,p=0.826)。Kaplan-Meier分析显示,MIOS的再干预时间更长(p=0.029)。并发症发生率相似,具体的并发症在组间有所不同。生活质量结果具有可比性。结论:由于更好的解剖结果,ORIF对于高需求患者是优选的,而MIOS通过减少再干预和并发症来适合高风险患者。需要进一步的随机试验来证实这些发现。
    Background: The treatment of displaced intra-articular calcaneal fractures (DIACF) is debated. This study compares open reduction and internal fixation (ORIF) with minimally invasive osteosynthesis (MIOS). Methods: We conducted a retrospective study on 70 patients with DIACF treated between January 2018 and September 2022, divided into ORIF (n = 50) and MIOS (n = 20) groups. Functional outcomes were assessed using the Maryland Foot Score (MFS) and the Creighton-Nebraska Health Foundation Assessment Scale (CNHFAS). Radiographic outcomes, complication rates, and reintervention rates were evaluated. A chi-square analysis examined the correlation between Sanders classification and treatment choice. Results: The chi-square analysis indicated no significant correlation between the complexity of the fracture and the type of treatment chosen (χ2 = 0.175, p = 0.916). Additionally, the Cochran-Armitage test for trend showed no significant trend in the choice of treatment based on fracture complexity (statistic = 0.048, p = 0.826). A Kaplan-Meier analysis showed a longer time to reintervention for MIOS (p = 0.029). Complication rates were similar, with specific complications varying between groups. Quality-of-life outcomes were comparable. Conclusions: ORIF is preferable for high-demand patients due to better anatomical outcomes, while MIOS suits high-risk patients by reducing reinterventions and complications. Further randomized trials are needed to confirm these findings.
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  • 文章类型: Case Reports
    关于截肢的决策代表了一个重大的临床挑战,特别是当初始评估与全球使用的量表中建立的标准不一致时,MESS量表的情况也是如此。本文介绍了一名24岁女性患者的案例,该患者在道路交通事故后被转移到大学医院,左下肢有严重和较大的病变。尽管最初的预后不良和住院并发症,包括多次外科手术和足部下垂,通过完全解剖挽救处于危险中的肢体,可以实现良好的恢复。多学科方法和强化康复有助于实现令人满意的功能恢复。这个案例强调了考虑截肢量表评分之外的因素的重要性,以及需要全面护理以改善复杂四肢损伤患者的预后。
    Decision-making regarding limb amputation represents a significant clinical challenge, especially when the initial evaluation does not coincide with the criteria established in scales used worldwide, as is the case of the MESS scale. This article presents the case of a 24-year-old female patient who was transferred to a university hospital after a road traffic accident with severe and large lesions in the left lower limb. Despite a poor initial prognosis and in-hospital complications, including multiple surgical procedures and foot drop, a favorable recovery was achieved with complete anatomical salvage of the limb at risk. The multidisciplinary approach and intensive rehabilitation were instrumental in achieving a satisfactory functional recovery. This case highlights the importance of considering factors beyond amputation scale scores, as well as the need for comprehensive care to improve outcomes in patients with complex extremity injuries.
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  • 文章类型: Letter
    暂无摘要。
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  • 文章类型: Journal Article
    背景:通过使用外部固定器在横向方向上延伸软组织,可以对由Apert综合征(也称为Apert手)引起的复杂并指进行网纹成形术。本研讨旨在验证无植皮网成形术的有用性。
    方法:从2015年至2023年在单个机构进行了带有侧向延伸的网纹成形术。患者为4名年龄在1-3岁的Apert手儿童。定制的小型外部固定器用于所有软组织延伸。
    结果:在所有5名患者5-6岁的时候,完成了没有植皮的网纹成形术。
    结论:使用简单的外固定器对软组织进行横向延伸,可以进行无植皮的网眼成形术。
    BACKGROUND: Webplasty can be conducted for complex syndactyly caused by Apert syndrome (also referred to as Apert hand) by extending the soft tissue in the lateral direction using an external fixator. This study aimed to verify the usefulness of webplasty without skin grafting.
    METHODS: Webplasty with lateral extension was conducted at a single institution from 2015 to 2023. The patients were four children with Apert hand aged 1-3 years. A custom-made small external fixator was used for all of the soft tissue extension.
    RESULTS: Webplasty without skin grafting was completed by the time all five patients were 5-6 years of age.
    CONCLUSIONS: Webplasty without skin grafting was possible with lateral extension of the soft tissue using a simple external fixator.
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  • 文章类型: Journal Article
    背景:几种方法已用于治疗小儿股骨远端骨折,如弹性稳定髓内钉(ESIN),外固定器(EF)和钢板接骨术,但是关于最佳方法还没有达成共识。这项研究的目的是比较EF和ESIN技术在小儿股骨远端干phy端-骨干连接(MDJ)骨折中的临床结果。
    方法:我们回顾性分析了2015年1月至2022年1月间手术治疗的小儿股骨远端MDJ骨折。对患者图表进行了人口统计,损伤和射线照相数据。所有患者根据手术技巧分为EF组和ESIN组。不对齐被定义为在任一平面中超过5度的角畸形。通过Flynn评分系统测量临床结果。
    结果:本研究纳入了38例患者,其中,23例接受EF治疗,15与ESIN。随访时间12~24个月,平均18个月。在最后的后续行动中,所有骨折均愈合。尽管两组在人口统计学数据上没有统计学差异,逗留时间,估计失血量(EBL),开放还原率,骨折愈合时间和Flynn评分,手术时间EF优于ESIN,透视曝光和部分承重时间。EF组皮肤刺激率明显高于对照组,而ESIN的错位率明显较高。
    结论:EF和ESIN均是治疗小儿股骨远端MDJ骨折的有效方法。ESIN与较低的皮肤刺激率相关。然而,EF技术具有手术时间短,减少荧光照射,部分承重的时间更短,以及较低的畸形发生率。
    方法:三级。
    BACKGROUND: Several methods have been used for the treatment of pediatric distal femoral fractures, such as elastic stable intramedullary nail (ESIN), external fixator (EF) and plate osteosynthesis, but there has been no consensus about the optimal method. The purpose of this study was to compare the clinical outcome between EF and ESIN techniques used in metaphyseal-diaphyseal junction (MDJ) fractures of the pediatric distal femur.
    METHODS: We retrospectively analyzed operatively treated MDJ fractures of pediatric distal femur between January 2015 and January 2022. Patient charts were reviewed for demographics, injury and data of radiography. All of the patients were divided into EF and ESIN groups according to the operation techniques. Malalignment was defined as more than 5 degrees of angular deformity in either plane. Clinical outcomes were measured by Flynn scoring system.
    RESULTS: Thirty-eight patients were included in this study, among which, 23 were treated with EF, and 15 with ESIN. The mean follow-up time was 18 months (12-24 months). At the final follow-up, all of the fractures were healed. Although there were no statistical differences between the two groups in demographic data, length of stay, estimated blood loss (EBL), rate of open reduction, time to fracture healing and Flynn score, the EF was superior to ESIN in operative time, fluoroscopic exposure and time to partial weight-bearing. The EF group had a significantly higher rate of skin irritation, while the ESIN had a significantly higher rate of malalignment.
    CONCLUSIONS: EF and ESIN are both effective methods in the treatment of MDJ fractures of the pediatric distal femur. ESIN is associated with lower rates of skin irritation. However, EF technique has the advantages of shorter operative time, reduced fluoroscopic exposure, and shorter time to partial weight-bearing, as well as lower incidence of malalignment.
    METHODS: Level III.
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  • 文章类型: Journal Article
    外部固定装置通常用于骨科手术中,以管理一系列病理。在这个患者群体中,目前对最佳康复技术尚无共识。在实践中存在很大的差异,对这些如何影响治疗结果的理解有限。
    遵循系统审查和荟萃分析(PRISMA)指南的首选报告项目,对联合和补充医学数据库(AMED)进行了系统评价,护理和相关健康文献累积指数(CINAHL),MEDLINE,PEDro,和COCHRANE数据库,灰色文献来源和对收录文章的前后搜索。在严格筛选和预定的纳入标准后选择研究。使用经过验证的评估工具评估数据质量。按康复类型合成文章,随后进行描述性分析。
    从确定的1,156篇文章中,18人符合入选条件。整体质量较低,临床评论和案例研究是最常见的研究类型。研究是按康复类型综合的,最常见的主题是步态再教育,加强,治疗辅助,积极练习和负重练习。
    缺乏高质量的证据来支持有意义的建议并指导该患者队列的康复实践。对接受外固定治疗的患者的进一步研究,特别是身体康复对骨骼愈合的潜在影响,力量的回归,移动性和独立功能在更广泛的骨科人群中可能具有转移性。
    由于现有文献的质量较差,该系统综述无法提供临床建议。然而,希望本文能为进一步研究外固定架治疗患者的康复提供基础。
    PawsonJR,教堂D,弗莱彻J,etal.成人外固定治疗下肢重建的康复技术:系统评价。创伤肢体重建策略2024;19(1):45-55。
    UNASSIGNED: External fixation devices are commonly used in orthopaedic surgery to manage a range of pathologies. In this patient population, there is currently no consensus on optimal rehabilitation techniques. There exists a large variation in practice, with a limited understanding of how these affect treatment outcomes.
    UNASSIGNED: Following Preferred Reporting Items for Systematic Reviews and Meta-analyses (PRISMA) guidelines, a systematic review was conducted of Allied and Complementary Medicine Database (AMED), Cumulative Index to Nursing and Allied Health Literature (CINAHL), MEDLINE, PEDro, and COCHRANE databases, grey literature sources and forward and backward searching of included articles. Studies were selected following rigorous screening with predefined inclusion criteria. Data quality was assessed using validated appraisal tools. Articles were synthesised by rehabilitation type and descriptive analysis was subsequently performed.
    UNASSIGNED: From 1,156 articles identified, 18 were eligible for inclusion. The overall quality was low, with clinical commentaries and case studies being the most common study type. Studies were synthesised by rehabilitation type, the most common themes being gait re-education, strengthening, therapy-assisted, active exercises and weight-bearing exercises.
    UNASSIGNED: There is a lack of high-quality evidence to support meaningful recommendations and guide rehabilitation practices for this patient cohort. Further research for patients being treated in external fixation, especially related to the potential effects of physical rehabilitation on bone healing, return of strength, mobility and independent function is likely to have transferability within wider orthopaedic populations.
    UNASSIGNED: This systematic review is unable to provide clinical recommendations due to the poor quality of the available literature. However, it is hoped this paper will provide a foundation for further research to improve rehabilitation for patients being treated with external fixation.
    UNASSIGNED: Pawson JR, Church D, Fletcher J, et al. Rehabilitation Techniques for Adults Undergoing External Fixation Treatment for Lower Limb Reconstruction: A Systematic Review. Strategies Trauma Limb Reconstr 2024;19(1):45-55.
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  • 文章类型: Journal Article
    比较几种骨盆前环外固定器与两种新配置治疗TileC骨盆骨折的生物力学特性。评价新构型的有效性,为其临床应用提供参考。建立了TileC骨盆环损伤(单侧纵向骶骨骨折和同侧耻骨骨折)的有限元模型。骨盆用髂骨外固定器(IC)固定,前髂下棘外固定器(AIIS),IC和AIIS的组合,髂前上棘外固定器(ASIS)和AIIS的组合,S1和5种型号的骶髂螺钉。前后骨盆环在垂直纵向载荷下的稳定性指标,对左右压缩载荷和前后剪切载荷进行量化和比较。在模拟双足站立位置,骶骨上表面中点垂直位移的结果与后旋转角度的位移一致,从最大到最小的顺序是IC,AIIS,ASIS+AIIS,IC+AIIS和S1螺钉。IC的纵向位移大于其他模型的纵向位移。ASIS+AIIS和IC+AIIS的位移相似,后者较小。在模拟的半卧位中,骶骨上表面中点的垂直位移和后旋转角位移也一致,从大到小的排名:IC,AIIS,ASIS+AIIS,IC+AIIS和S1螺钉。在模拟左右压缩载荷状态下,骶骨外侧骨折端最高点的侧向位移与耻骨外侧骨折端最高点一致,从大到小的顺序是S1螺丝,IC,AIIS,ASIS+AIIS和IC+AIIS,其中S1螺钉和IC的位移较大,ASIS+AIIS和IC+AIIS的位移与其他模型相似且较小。IC+AIIS的位移小于ASIS+AIIS的位移。在模拟前后剪切载荷条件下,骶骨外侧骨折端最高点和耻骨外侧骨折端最高点的后位移也一致,从大到小的排名:IC,AIIS,ASIS+AIIS,IC+AIIS和S1螺钉。其中,IC和AIIS的位移较大。ASISAIIS和ICAIIS的位移相似,后者较小。对于以TileC骨盆骨折为代表的不稳定骨盆损伤,IC和AIIS组合的生物力学各种稳定性优于常规配置的外部固定器。ASIS和AIIS组合的生物力学稳定性也优于常规配置的外固定器。比IC和AIIS的组合略差。与骶髂螺钉和常规外固定器相比,IC+AIIS和ASIS+AIIS的横向稳定性尤为突出。
    To compare the biomechanical properties of several anterior pelvic ring external fixators with two new configurations in the treatment of Tile C pelvic fractures, in order to evaluate the effectiveness of the new configurations and provide a reference for their clinical application. A finite element model of a Tile C pelvic ring injury (unilateral longitudinal sacral fracture and ipsilateral pubic fracture) was constructed. The pelvis was fixed with iliac crest external fixator (IC), anterior inferior iliac spine external fixator (AIIS), combination of IC and AIIS, combination of anterior superior iliac spine external fixator (ASIS) and AIIS, and S1 sacroiliac screw in 5 types of models. The stability indices of the anterior and posterior pelvic rings under vertical longitudinal load, left-right compression load and anterior-posterior shear load were quantified and compared. In the simulated bipedal standing position, the results of the vertical displacement of the midpoint on the upper surface of the sacrum are consistent with the displacement of the posterior rotation angle, and the order from largest to smallest is IC, AIIS, ASIS + AIIS, IC + AIIS and S1 screw. The longitudinal displacement of IC is greater than that of the other models. The displacements of ASIS + AIIS and IC + AIIS are similar and the latter is smaller. In the simulated semi-recumbent position, the vertical displacement and posterior rotation angle displacement of the midpoint on the upper surface of the sacrum are also consistent, ranking from large to small: IC, AIIS, ASIS + AIIS, IC + AIIS and S1 screw. Under the simulated left-right compression load state, the lateral displacements of the highest point of the lateral sacral fracture end are consistent with the highest point of the lateral pubic fracture end, and the order from large to small is S1 screw, IC, AIIS, ASIS + AIIS and IC + AIIS, among which the displacements of S1 screw and IC are larger, and the displacements of ASIS + AIIS and IC + AIIS are similar and smaller than those of other models. The displacements of IC + AIIS are smaller than those of ASIS + AIIS. Under the simulated anterior-posterior shear load condition, the posterior displacements of the highest point of the lateral sacral fracture end and the highest point of the lateral pubic fracture end are also consistent, ranking from large to small: IC, AIIS, ASIS + AIIS, IC + AIIS and S1 screw. Among them, the displacements of IC and AIIS are larger. The displacements of ASIS + AIIS and IC + AIIS are similar and the latter are smaller. For the unstable pelvic injury represented by Tile C pelvic fracture, the biomechanical various stabilities of the combination of IC and AIIS are superior to those of the external fixators of conventional configurations. The biomechanical stabilities of the combination of ASIS and AIIS are also better than those of the external fixators of conventional configurations, and slightly worse than those of the combination of IC and AIIS. Compared with sacroiliac screw and conventional external fixators, the lateral stabilities of IC + AIIS and ASIS + AIIS are particularly prominent.
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  • 文章类型: Journal Article
    这项系统评价的目的是研究膝关节假体周围感染(PJI)后膝关节固定术(KA)的结果。髓内钉(IMN)的临床结果和并发症发生率的差异,外固定架(EF),和压缩电镀(CP)程序进行了比较。共纳入23项研究。人口统计,微生物数据,植入物的类型,有并发症的手术技术,重新操作,聚变,报告截肢率。对787例患者进行了评估,其中601人(76.4%),166(21%),19人(2.4%)接受了IMN,EF,CP,分别。最常见的病原体是凝固酶阴性葡萄球菌(CNS)。融合发生在71.9%,78.8%,IMN后92.3%的患者,EF,CP,分别,差异无统计学意义。再感染率为14.6%,15.1%,IMN后10.5%,EF,CP,分别,差异无统计学意义。转换为截肢的发生率为4.3%,5%,15.8%的患者在IMN后,EF,CP,CP后的发生率高于EF后。IMN技术是用于使用KA管理PJI的最常用选项。在融合方面没有差异,再感染,或在IMN和EF之间报告了截肢转化率。CP很少使用,高截肢率代表了该技术的重要限制。
    The aim of this systematic review was to investigate the outcomes of knee arthrodesis (KA) after periprosthetic joint infection (PJI) of the knee. Differences in clinical outcomes and complication rates among the intramedullary nailing (IMN), external fixation (EF), and compression plating (CP) procedures were compared. A total of 23 studies were included. Demographics, microbiological data, types of implants, surgical techniques with complications, reoperations, fusion, and amputation rates were reported. A total of 787 patients were evaluated, of whom 601 (76.4%), 166 (21%), and 19 (2.4%) underwent IMN, EF, and CP, respectively. The most common causative pathogen was coagulase-negative Staphylococcus (CNS). Fusion occurred in 71.9%, 78.8%, and 92.3% of the patients after IMN, EF, and CP, respectively, and no statistically significant difference was found. Reinfection rates were 14.6%, 15.1%, and 10.5% after IMN, EF, and CP, respectively, and no statistically significant difference was found. Conversion to amputation occurred in 4.3%, 5%, and 15.8% of patients after IMN, EF, and CP, respectively; there was a higher rate after CP than after EF. The IMN technique is the most common option used for managing PJI with KA. No differences in terms of fusion, reinfection, or conversion-to-amputation rates were reported between IMN and EF. CP is rarely used, and the high amputation rate represents an important limitation of this technique.
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  • 文章类型: Journal Article
    背景:该研究的目的是评估和比较圆形或单侧外固定器在髓内钉上的骨运输治疗感染引起的胫骨骨缺损的临床疗效。
    方法:收集2010年5月至2019年1月感染导致骨缺损患者的临床和影像学资料,进行分析。13例患者使用单侧外固定器在髓内钉上进行骨运输(A组),而12例患者接受了圆形外固定器在髓内钉上的治疗(B组)。使用Ilizarov标准的研究和应用协会对两组的骨和功能结果进行评估和比较。术后并发症根据Paley分类进行评估。
    结果:共有25例患者使用外固定器在髓内钉上进行了骨运输,平均随访时间31.63±5.88个月。年龄差异无统计学意义,性别,每位患者以前的手术,感染持续时间,缺陷尺寸,随访时间与A、B组比较差异无统计学意义(P>0.05)。然而,手术时间差异有统计学意义(187.13±21.88minvs.255.76±36.42min,P=0.002),术中失血量(39.26±7.33mLvs.53.74±10.69mL,P<0.001),外固定时间(2.02±0.31个月vs.2.57±0.38个月,P=0.045),外固定指数(0.27±0.08个月/厘米vs.0.44±0.09个月/厘米,P=0.042),骨愈合时间(8.37±2.30个月vs.A组和B组之间为9.07±3.12,P=0.032)。与B组相比,A组骨和功能结果的优良率更高(76.9%vs.75%和84.6%vs.58.3%)。在功能结果方面观察到统计学上的显着差异(优/好/一般/差,5/6/2/0vs.2/5/4/1,P=0.013)和每位患者的并发症(0.38vs.1.16,P=0.012)在A组和B组之间。
    结论:在髓内钉上使用外固定器的组合技术进行骨运输被证明是治疗胫骨骨缺损的有效方法由感染引起。与圆形外固定器相比,使用单侧外固定器在髓内钉上进行骨运输可减少外固定时间,并发症少,和更好的功能结果。
    BACKGROUND: The purpose of the study was to assess and compare the clinical efficacy of bone transport with either circular or unilateral external fixators over an intramedullary nail in the treatment of tibial bone defects caused by infection.
    METHODS: Between May 2010 and January 2019, clinical and radiographic data were collected and analyzed for patients with bone defects caused by infection. Thirteen patients underwent bone transport using a unilateral external fixator over an intramedullary nail (Group A), while 12 patients were treated with a circular external fixator over an intramedullary nail (Group B). The bone and functional outcomes of both groups were assessed and compared using the Association for the Study and Application of the Method of the Ilizarov criteria, and postoperative complications were evaluated according to the Paley classification.
    RESULTS: A total of 25 patients were successfully treated with bone transport using external fixators over an intramedullary nail, with a mean follow-up time of 31.63 ± 5.88 months. There were no significant statistical differences in age, gender, previous surgery per patient, duration of infection, defect size, and follow-up time between Group A and Group B (P > 0.05). However, statistically significant differences were observed in operation time (187.13 ± 21.88 min vs. 255.76 ± 36.42 min, P = 0.002), intraoperative blood loss (39.26 ± 7.33 mL vs. 53.74 ± 10.69 mL, P < 0.001), external fixation time (2.02 ± 0.31 month vs. 2.57 ± 0.38 month, P = 0.045), external fixation index (0.27 ± 0.08 month/cm vs. 0.44 ± 0.09 month/cm, P = 0.042), and bone union time (8.37 ± 2.30 month vs. 9.07 ± 3.12, P = 0.032) between Group A and Group B. The excellent and good rate of bone and functional results were higher in Group A compared to Group B (76.9% vs. 75% and 84.6% vs. 58.3%). Statistically significant differences were observed in functional results (excellent/good/fair/poor, 5/6/2/0 vs. 2/5/4/1, P = 0.013) and complication per patient (0.38 vs. 1.16, P = 0.012) between Group A and Group B.
    CONCLUSIONS: Bone transport using a combined technique of external fixators over an intramedullary nail proved to be an effective method in treating tibial bone defects caused by infection. In comparison to circular external fixators, bone transport utilizing a unilateral external fixator over an intramedullary nail resulted in less external fixation time, fewer complications, and better functional outcomes.
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  • 文章类型: Journal Article
    背景:在低收入国家(LIC),资源的缺乏限制了颅颌面骨折(CMF)的治疗。因此,在这些区域中考虑巴顿绷带和/或齿间布线。骨折复位通过永久闭塞维持6周,这往往导致依从性有限和不满意的结果。这项基于尸体的研究的目的是评估使用外部面部固定器(EFF)治疗CMF的可行性,其生物力学值,并定义最佳的针插入点和角度。
    方法:使用AO手固定器。在13个解剖标本上,用EFF治疗了LeFort1-3型硬腭骨折的CMF。骨折是用凿子制造的,和销被放置在特定的解剖区域。通过拉力计分析了销钉的最大拔出力[N]。并评估了下颌钉的Fmax。对健康的人进行计算机断层扫描,骨折和EFF处理的头骨。
    结果:单销的拔出力为下颌销(n=15,中位数488.0N),眶上钉(n=15,中位数455.0N),the针(n=14,中位数269.1N),内侧硬腭针(n=12,中位数208.4N)和外侧硬腭针(n=8,中位数49.6N)。
    结论:结果表明该手术技术是可行的,并且EFF的稳定性足以维持还原。所需的销可以安全地插入到所描述的区域中,具有良好的减小结果。使用EFF为LIC中CMF的非手术治疗提供了可行的替代方案。
    BACKGROUND: The lack of resources limits the treatment of craniomaxillofacial fractures (CMF) in low-income countries (LIC). Therefore, Barton bandages and/or interdental wiring are considered in these regions. Fracture reduction is maintained by permanent occlusion for 6 weeks, which often leads to limited compliance and dissatisfying results. The aim of this cadaver-based study is to evaluate the feasibility of the use of an external face fixator (EFF) for the treatment of CMF, its biomechanical values and to define the optimal pin insertion points and angles.
    METHODS: An AO hand fixator was used. CMF of types Le Fort 1-3 with split fractures of the hard palate were treated with EFF on 13 anatomical specimens. Fractures were created using a chisel, and pins were placed in specific anatomical regions. The maximal pull-out force [N] of pins was analysed by a tensile force gauge, and Fmax of the mandibular pins was evaluated. Computer tomography scans were performed on the healthy, fractured and EFF-treated skulls.
    RESULTS: The pull-out forces for the single pins were mandibular pins (n = 15, median 488.0 N), supraorbital pins (n = 15, median 455.0 N), zygomatic pins (n = 14, median 269.1 N), medial hard palate pins (n = 12, median 208.4 N) and lateral hard palate pins (n = 8, median 49.6 N).
    CONCLUSIONS: The results indicate that the operation technique is feasible, and the stability of the EFF is sufficient for maintaining the reduction. The required pins can safely be inserted into the described areas with good reduction results. Using EFF offers a feasible alternative to the non-surgical treatment of CMF in LIC.
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