Does distance from joint line influence complications after distal femur fractures in native and periprosthetic knees?

BackgroundDistal femur fractures are projected to increase in incidence secondary to an aging population and growing utilization of total knee arthroplasty. Surgical management is the standard of care, but optimal treatment for far distal fractures is still unclear. Our study investigates if there are distal femur fractures too distal to be treated with lateral locked plating in periprosthetic fractures.MethodsOne hundred and ten consecutive patients treated with locked plating for distal femur fractures around a total knee replacement were identified using CPT codes. Fractures were classified by length of the distal fracture segment and Su classification. Complications studied were nonunion, malunion, infection, further fracture related surgery, readmission within 90 days, and mortality within 1 year of surgery. Sixty six fractures met inclusion criteria of 180 days of follow-up or sustaining a complication prior to180 days.ResultsThe size of the distal fracture segment and Su classification did not correlate with increased complication rate in periprosthetic distal femur fractures.ConclusionsThere was no difference between complications following lateral locked plating of distal femur fractures based on the size of the distal fracture segment in periprosthetic fractures. Lateral locked plating is an effective treatment modality for these fractures regardless of how distal the fracture extends.     

Biomechanical analysis of retrograde intramedullary nail fixation in distal femoral fractures

This study employed both mechanical testing and finite element analysis to compare the stiffness variations among different intramedullary nail constructs used in the treatment of distal femoral fractures. Compressive and torsional experiments were conducted on a transversely, as well as an obliquely fractured sawbone femur restored with the retrograde intramedullary nail. Corresponding finite element models were established to evaluate the stress distributions around screw holes. The results showed that a perifracture screw could increase stiffness by 40% for the obliquely fractured femur, but that it played an insignificant role in stiffness improvement for the transverse fracture groups. Moreover, compared to proximal-screw fixation, distal-screw fixation could improve construct stiffness by 20%. The absence of one of the two distal screws would increase the screw-hole stress by 70%. Therefore, the distal screw around the metaphyseal region has a more important stabilizing effect in the femur-nail construct than does the proximal screw. A twisting stress pattern occurs on the unused screw holes of the metaphyseal region and induces a higher risk for fatigue fracture. The locking screw at the fracture site would be most effective only if it passed through the fracture gap to integrate the separated femoral pieces.     

Distal femoral replacement or internal fixation for management of periprosthetic distal femur fractures: A systematic review

BackgroundThe number of periprosthetic fractures above a total knee arthroplasty continues to increase. These fractures are associated with a high risk of morbidity and mortality. Techniques for addressing these fractures include open reduction internal fixation (ORIF) and revision arthroplasty, including distal femoral replacement (DFR). The primary aim of this review is to compare mortality and reoperation rates between ORIF and DFR when used to treat periprosthetic distal femur fractures.MethodsA systematic review including MEDLINE, Embase and Cochrane Library databases was completed from inception to April 10, 2021. Studies including a comparator cohort were meta-analyzed.ResultsFourteen studies were identified for inclusion, of which, five had sufficient homogeneity for inclusion in a meta-analysis. 30-day and 2-year mortality was 4.1% and 14.6% in the DFR group. There was no statistically significant difference between ORIF and DFR (log Odds-Ratio (OR) = -0.14, 95 %CI: −0.77 to 0.50). The reoperation rate in the DFR group was 9.3% versus 14.8% for ORIF, with no difference between groups (log OR = 0.10, 95 %CI: −0.59 to 0.79). There was no difference in rates of deep infection (log OR = 0.22, 95 %CI: −0.83 to 1.28). Direct comparison of functional outcomes was not possible, though did not appear significant.ConclusionDFR in the setting of periprosthetic distal femur fractures is equivalent to ORIF with respect to mortality and reoperation rate and thus a safe and reliable treatment strategy. DFR may be more reliable in complex fracture patterns where the ability to obtain adequate fixation is difficult.     

Revision Arthroplasty Using a MUTARS? Prosthesis in Comminuted Periprosthetic Fracture of the Distal Femur

Periprosthetic fractures after total knee arthroplasty (TKA) are gradually increasing, reflecting extended lifespan, osteoporosis, and the increasing proportion of the elderly during the past decade. Supracondylar periprosthetic femoral fracture is a potential complication after TKA. Generally, open reduction and internal fixation are the conventional option for periprosthetic fracture after TKA. However, the presence of severe comminution with component loosening can cause failure of internal fixation. Although the current concept for periprosthetic fracture is open reduction and internal fixation, we introduce an unusual case of revision arthroplasty using a MUTARS® prosthesis for a comminuted periprosthetic fracture in the distal femur after TKA, with technical tips.     

两种非解剖复位内固定Pauwels Ⅲ型头下型股骨颈骨折的有限元分析

目的通过三维有限元法对"阳性支撑"和"阴性支撑"两种非解剖复位内固定Pauwels Ⅲ型头下型股骨颈骨折进行生物力学比较,并为临床应用提供理论参考。方法将25岁男性青年健康股骨CT数据及PH螺钉数据导入相关软件,分别建立Pauwels Ⅲ型头下型股骨颈骨折的"阳性支撑"和"阴性支撑"两种非解剖复位三维模型,再通过PH螺钉系统行内固定。应用有限元分析法在相同加载和约束条件下模拟"单腿站立"、"行走"两种工况。评价和比较"阳性支撑"组和"阴性支撑"组骨折端最大位移、股骨最大应变、内固定最大应力等指标。结果在两种工况下,骨折端最大位移"阳性支撑"组和"阴性支撑"组在"单腿站立"、"行走"两种工况下分别为0.87 mm和1.38 mm,股骨最大应变分别为1.27 mm和1.98 mm,1.77e~(-2)和2.47e~(-2),1.89e~(-2)和2.12e~(-2),内固定最大应力分别为304.47 Mpa和359.03 Mpa,362.24Mpa和391.52 Mpa。结论本研究通过有限元分析方法证实了Yechiel Gotfried复位理论适用于Pauwels Ⅲ型头下型股骨颈骨折该型骨折,"阳性支撑"复位较"阴性支撑"复位具有生物力学优势。     

内固定物置入治疗股骨远端骨折的生物力学变化与临床效果

背景：以置入内固定物治疗是股骨远端骨折研究的首选方法之一。 目的：因股骨远端骨折的解剖结构复杂,故评价股骨远端骨折后不同内固定物治疗后生物力学变化可引导临床应用。 方法：分别测定微创内固定系统钢板、动力髁螺钉以及逆行交锁髓内钉内固定治疗股骨远端骨折时的抗压刚度和抗弯强度,同时比较3种内固定之间的生物力学变化。对应用微创内固定系统钢板、动力髁螺钉以及逆行交锁髓内钉内固定治疗股骨远端骨折的患者进行随访观察,明确3组内固定物临床治疗效果,并进行比较分析。 结果与结论：生物力学测试结果显示,内固定物置入治疗股骨远端骨折时,动力髁螺钉的应力遮挡过大,而逆行交锁髓内钉的刚度过低。微创内固定系统钢板既具有一定的变形性,使应力能够通过骨传导,又具有较强的刚度,能够为骨折的内固定提供较好的稳定性。对股骨远端骨折内固定治疗的患者进行随访观察发现,应用微创内固定系统钢板内固定骨折愈合时间更短,并发症发生率更低,膝关节功能优良率更高,是股骨远端骨折首选的治疗方法之一。     

股骨颈骨折内固定物临床及生物力学特点比较

目的：探讨股骨颈骨折内固定植入物的生物力学特点,为治疗股骨颈骨折选择内固定植入物提供生物力学依据。方法：应用计算机检索PubMed数据库1996年1月-2008年8月关于股骨颈骨折的内固定器械方面的文章,比较股骨颈骨折不同内固定植入物的生物力学特点。结果：MCS的抗剪切作用较弱,抗扭转作用与DHS相当,固定骨质疏松及不稳定的骨折不如DHS和LPFP,但有较好的动力加压作用。DHS／DCS的抗剪切作用较强,也有较强的抗扭转作用和动力加压作用,治疗骨质较疏松的骨折也有较好的固定作用。LPFP各方面的强度都最高,固定不稳定骨折及骨质疏松的骨折也最为稳定,但缺乏动力加压作用。结论：不同的内固定材料有不同的生物力学特性,股骨颈骨折的内固定选择要综合多方面因素,根据医师的经验、患者的病情和年龄作出最合理的选择。     

Intraprosthetic screw fixation increases primary fixation stability in periprosthetic fractures of the femur—A biomechanical study

BackgroundThe purpose of this study was to develop a new fixation technique for the treatment of periprosthetic fractures using intraprosthetic screw fixation. The goal was to biomechanically evaluate the increase in primary fixation stability compared to unicortical locked-screw plating.MethodsA Vancouver C periprosthetic fracture was simulated in femur prosthesis constructs. Fixation was then performed with either unicortical locked-screw plating using the LISS-plate or with intraprosthetic screw fixation. Fixation stability was compared in an axial load-to-failure model.ResultsThe intraprosthetic fixation model was superior to the unicortical locked-screw fixation in all tested devices. The intraprosthetic fixation model required 11,807 N ± 1596 N for failure and the unicortical locked-screw plating required 7649 N ± 653 N (p = 0.002).ConclusionIntraprosthetic screw anchorage with a special prosthesis drill enhances the primary stability in treating periprosthetic fractures by internal fixation.     

Delbet Ⅱ型儿童股骨颈骨折不同内固定方式的有限元分析

背景：儿童DelbetⅡ型股骨颈骨折后股骨头坏死率较高,有限元法已广泛应用于研究成人股骨颈骨折内固定后的稳定性,但儿童股骨颈骨折的相关分析较少。目的：研究3种不同内固定方式治疗DelbetⅡ型儿童股骨颈骨折的生物力学性能。方法：选择1例8岁儿童健康志愿者为研究对象。CT扫描患儿股骨近端影像数据导入Mimics 17.0,在Geomagic 14.0,Cero 3.0,Hyper Works13.0中建立3种内固定方式治疗DelbetⅡ型儿童股骨颈骨折的有限元模型,分别为空心钉模型（CS模型）、空心钉联合克氏针模型（CS+K模型）、锁定钢板模型（LP模型）,观察3种模型的内固定应力、骨骺应力及骨折断端相对位移。结果与结论：（1）CS+K模型骨折端和股骨头内的应力显著大于CS模型、LP模型（P <0.001）;LP模型的股骨侧应力显著大于CS+K模型、CS模型（P<0.001）;（2）CS模型的相对位移量显著大于CS+K模型和LP模型（P<0.001）;（3）LP模型的骺板平均应力显著大于CS+K模型、CS模型（P<0.001）;（4）结果表明,空心钉联合克氏针固定...     

不同植入物内固定修复股骨颈合并同侧转子下骨折：生物力学性能比较

BACKGROUND: Choosing internal fixator implants with good strength and stiffness is the key to repair femoral neck combined with ipsilateral subtrochanteric fractures. OBJECTIVE: To compare the biomechanical properties of different implant fixation for femoral neck combined with ipsilateral subtrochanteric fractures. METHODS: Totally 24 adult antiseptic cadaver specimens were used to produce fracture models with femoral neck fracture combined with 5 cm of ipsilateral subtrochanteri medical cortical defect, and were divided into femoral proximal locking plate group, lengthening proximal femur anti-rotation intramedullary nail group and lengthening proximal femoral nail group according to the random number table method. The results of axial compression test, torsion test and axial compression failure rest in three groups were compared. RESULTS AND CONCLUSION: The axial compressive stiffness and failure load in lengthening proximal femur anti-rotation intramedullary nail group were significantly greater than those in femoral proximal locking plate group and lengthening proximal femoral nail group, and those in lengthening proximal femoral nail group were significantly greater than those in femoral proximal locking plate group (P < 0.05). The torsional stiffness in femoral proximal locking plate group was significantly greater than that in lengthening proximal femur anti-rotation intramedullary nail group and lengthening proximal femoral nail group, and that in lengthening proximal femur anti-rotation intramedullary nail group was significantly greater than that in lengthening proximal femoral nail group (P < 0.05). The indexes of biomechanical properties of specimens at the 4th and 8th weeks after fixation in three groups were slightly increased compared with those in 0 week after surgery, but the difference was no statistically significant (P > 0.05). These results demonstrate that to a certain extent, compared with the femoral proximal locking plate and lengthening lengthening proximal femoral nail, lengthening proximal femur anti-rotation intramedullary nail fixation for repair of femoral neck combined with ipsilateral subtrochanteric fractures has more biomechanical advantages.       

LISS钢板加同种异体骨移植治疗股骨远端骨折

背景：LISS钢板可在微创下固定骨折,减少血供的破坏,LISS钢板与同种异体骨同时应用可提高骨折的愈合率。 目的：观察LISS钢板加同种异体骨移植治疗股骨远端骨折的疗效。 方法：2009/2010采用LISS钢板加同种异体骨移植治疗股骨远端粉碎骨折73例进行修复重建。男47例,女26例,年龄32~76岁。交通事故61例,高处坠落9例,其他3例。闭合性损伤57例,开放性损伤16例。根据AO分型,A型19例,B型13例,C型41例。 结果与结论：根据Kolment膝关节功能评定标准判定,优27例,良39例,差4例(1例为尿毒症患者),优良率为90.4%。结果显示LISS钢板加同种异体骨移植治疗股骨髁骨折效果满意。     

锁定加压接骨板固定股骨近端假体周围骨折的生物力学分析

目的评价锁定加压接骨板(locking compression plate,LCP)固定股骨近端假体周围骨折(periprosthetic proximal femur fracture,PPFF)的生物力学强度。方法采用LCP和倒置股骨远端微创锁定接骨板(less invasive stabilization system,LISS)分别固定8对左、右配对的Vancouver B1型成人尸体PPFF标本,假体柄对应长度的股骨分别采用4枚双层皮质锁定螺钉固定(LCP组)和4枚单层皮质锁定螺钉固定(LISS组),骨折远端均采用4枚双层皮质锁定螺钉固定,两种接骨板使用锁定螺钉的螺孔距骨折端的距离相等。通过4点弯曲试验和扭转试验,对比分析两组的最大弯曲载荷、最大弯曲位移、抗弯刚度、最大扭矩、最大扭转角度和抗扭转刚度。结果 LCP组最大弯曲载荷、最大弯曲位移和抗弯刚度均大于LISS组,但差异无统计学意义(P>0.05)。LCP组最大扭矩、最大扭转角度和抗扭转刚度均大于LISS组,差异具有统计学意义(P<0.05)。结论 LCP抗扭转刚度明显优于LISS,对PPFF固定的力学稳定性更好。     

桡骨远端钢板联合拉力钉固定治疗Sander III型跟骨骨折的生物力学分析

提出并分析桡骨远端钢板（两点支撑）联合拉力钉固定治疗跟骨骨折的生物力学稳定性。在完整下肢骨骼-肌肉有限元模型的基础上,建立Sanders III型跟骨骨折模型并模拟固定,用桡骨远端钢板（两点支撑）联合拉力钉固定治疗骨折。评估该模型在静态站立和行走状态（足跟着地期、站立中期和推离期）的应力分布和位移情况。跟骨的应力集中于骨折端、跟骨与跟腱连接处,峰值为96.92 MPa。内固定的应力集中于钢板螺钉与载距突和跟骨结节接触位置,峰值为883.20 MPa。后关节面位移、Bohler角和Gissanes角均维持较好。桡骨远端钢板联合拉力钉固定治疗跟骨骨折具有良好的生物力学稳定性,体现微创原则,操作简单,术后可以早期康复训练,值得临床推广应用。     

自制微创股骨近端接骨板与普通动力髋螺钉治疗稳定型股骨转子间骨折的 生物力学对比

背景：研制一种新型植入物用于固定稳定型股骨转子间骨折。 目的：比较自制微创股骨近端系列接骨板与动力髋螺钉固定稳定型股骨转子间骨折后的生物力学性能。 方法：采集干燥股骨标本,模拟AO分型 A1.3型稳定型股骨转子间骨折模型,分别采用自制微创股骨近端系列接骨板和动力髋螺钉内固定,然后在股骨近端内外侧皮质布置6枚电阻片,检测固定后的抗压、抗弯、抗剪和抗扭能力。 结果与结论：股骨转子间骨折采用自制微创股骨近端系列接骨板固定后,股骨内、外侧强度比动力髋螺钉组固定强度高13%,内侧强度高16%,扭转强度高18%,扭转刚度高31%,差异有显著性意义(P < 0.05)。可见自制微创股骨近端系列接骨板整体生物力学性能优于常规用动力髋螺钉,前者能十分有效对抗股骨抗拉、抗压、抗旋和内翻能力。     

股骨转子间骨折不同外侧壁分型髓内钉治疗的有限元分析

背景：目前针对外侧壁破损型股骨转子间骨折的手术内固定方式存在争议,以股骨近端防旋髓内钉固定为主流方案,不同外侧壁分型的股骨转子间骨折髓内固定的生物力学研究较少。目的：通过有限元分析比较股骨近端防旋髓内钉治疗不同外侧壁分型股骨转子间骨折的生物力学特点,探讨外侧壁对股骨转子间骨折内固定的影响。方法：选择1例健康老年女性患者,根据股骨近端CT扫描数据,应用Mimics 21.0,Geomagic Wrap,Creo 6.0,Abaqus 2020软件建立股骨近端和股骨近端防旋髓内钉的三维有限元模型,模拟外侧壁稳定型、危险型及破裂型股骨转子间骨折,建立股骨近端防旋髓内钉内固定装配模型。观察在静止及行走2种状况下赋予同等载荷时3种骨折内固定模型的等效应力及位移分布云图。结果与结论：(1)A3.3型股骨转子间骨折在动态载荷时最大等效应力及位移均最大,最大等效应力约为A2.3型的2倍,A1.3型的2.7倍,最大等效位移约为A2.3型的1.5倍,A1.3型的3倍,静态时各型差别不明显;(2)动静态载荷时股骨颈、骨折端及主钉处等效应力A3.3型较A1.3和A2.3型增大,以主钉处明显;(3)动态载荷时股...     

带锁髓内钉和动力加压钢板内固定修复股骨干骨折后骨不连的比较

背景：四肢创伤骨折后可能会出现骨不连,植入物内固定是一种常用的修复方式,但不同的植入物内固定效果不同。 目的：探讨不同植入物内固定在股骨干骨折后骨不连治疗中的应用价值。 方法：回顾性分析亳州市人民医院2012年11月至2013年11月收治的72例股骨干骨折后骨不连患者,按照修复方式分为观察组和对照组,每组36例,分别实施带锁髓内钉和动力加压钢板内固定治疗。观察两组患者的切口长度、术中输血量、术后引流量、手术时间、骨折愈合时间以及膝关节功能恢复情况,并进行比较分析。 结果与结论：在手术时间和切口长度方面,两组差异无显著性意义(P > 0.05);对照组的术中输血量和术后引流量均显著大于观察组,骨折愈合时间显著长于观察组,末次随访感染率显著高于观察组,经比较差异均有显著性意义(P均 < 0.05);两组治疗前国际膝关节文献委员会膝关节评估表评分和Lysholm评分经比较差异均无显著性意义(P均 > 0.05),但治疗后末次随访观察组的两项评分均显著高于对照组,经比较差异均有显著性意义(P均 < 0.05)。表明与动力加压钢板相比,应用带锁髓内钉修复股骨干骨折后骨不连可以获得更好的效果,固定牢固,感染率低,更加符合生理和生物力学要求。中国组织工程研究杂志出版内容重点：人工关节;骨植入物;脊柱;骨折;内固定;数字化骨科;组织工程     

锁定加压钢板置入内固定治疗胫骨骨折的力学分析

背景：锁定加压钢板结合了传统钢板和支架原理,即头部有锁定螺纹的螺钉和钢板锁钉孔构成的内固定支架锁定单元,又有传统螺钉和动力加压孔构成的内固定支架加压单元,在骨折的内固定治疗方面具有很多优势。 目的：分析锁定加压钢板置入内固定治疗胫骨骨折的生物力学特点,以及在胫骨骨折治疗中的疗效。 方法：锁定加压钢板是依靠钢板与螺钉的成角稳定性和螺钉与骨之间的把持力来实现骨折内固定的。骨髓腔细小时应避免螺钉尖端损伤近端皮质的骨螺纹,应更换为双皮质自攻螺钉至少在对侧骨皮质获得把持力。骨质疏松植入螺钉,由于单皮质骨螺钉产生的工作长度减少,在所有骨折块均使用双皮质自攻螺钉,以提高螺钉工作长度。当长骨轴线与钢板对线不良时,要么打入长自攻螺钉,要么改变角度打入标准螺钉。锁定加压钢板应选择适宜的长度,钢板的长度取决钢板跨越比和钢板螺钉密度,钢板与螺钉间的应力还受螺钉数量和位置的影响。 结果与结论：锁定加压钢板置入内固定可应用于骨干或干骺端的简单骨折、粉碎性骨折、关节内及关节周围骨折、骨折延迟愈合、闭合或开放截骨术和不适合髓内钉固定的骨干骨折,对于骨质疏松骨折和假体周围骨折的内固定有很好的成角稳定性和把持力。锁定加压钢板置入内固定治疗胫骨骨干骨折均取得满意的疗效,符合生物力学固定原理。需要术者熟练掌握锁定加压钢板的内固定技术,避免由于失误导致内固定的失败。     

三角稳定固定系统对股骨颈骨折生物力学特性的有限元分析

目的:运用有限元分析,探讨三角稳定固定系统对股骨颈骨折的生物力学特性。方法:选取1名健康青年志愿者,获取其股骨CT影像学资料,构建股骨三维模型及股骨颈骨折三维模型。运用Ansys12.1有限元分析软件,模拟人体直立情况下正三角、倒三角稳定固定系统对内固定物应力分布、骨折处位移的影响。结果:正三角内固定、倒三角内固定模型的股骨头最大等效应力接近,倒三角内固定模型的内固定物最大等效应力低于正三角内固定。正三角内固定、倒三角内固定模型的股骨近端、内固定物最大位移接近。结论:正三角、倒三角稳定固定系统的股骨头最大等效应力、股骨近端最大位移、内固定物最大位移接近,倒三角内固定模型的内固定物最大等效应力更低。 【关键词】三角稳定固定系统;股骨颈骨折;生物力学;有限元分析     

双柱固定原则在骨质疏松性AO 13C型骨折的临床应用和疗效分析

目的 运用双柱固定原则,手术治疗AO 13C型骨质疏松性骨折,评价患者肘关节重建情况及其功能。方法对本院骨科自2008年1月至2017年12月期间治疗的54例AO 13C型骨质疏松性骨折的患者进行回顾性分析,均采用切开复位肱骨远端解剖型LCP双钢板固定治疗。本组患者男21例,女33例;平均年龄(65.4±5.8)岁;根据AO/ASIF分型,13C1型21例,13C2型27例,13C3型6例;受伤至手术时间平均(7.9±1.6)d。用Mayo Clinic肘关节功能评分标准来评估手术疗效。结果 平均随访时间(20.8±2.1)个月。平均手术时间103.5min;平均骨折愈合时间(13.5±1.0)周。术后伸肘平均9.4°±5.6°,屈肘平均108.1°±7.4°,活动范围平均99.2°±10.3°。Mayo Clinic肘关节功能评估平均(84.7±8.1)分;优20例,良29例,中5例,差0例。结论 运用双柱固定原则,使用解剖型LCP治疗AO 13C型骨质疏松性骨折临床效果优良,肘关节功能恢复良好。     

比较两种髓内钉置入修复骨质疏松性股骨转子间骨折的并发症发生率

背景：近年来动力髋螺钉受到人们的重视,且国际内固定研究学会改进的防旋型股骨近端髓内钉也被逐渐应用于临床,其疗效也得到了广泛的肯定。 目的：分析股骨近端髓内钉及股骨近端防旋髓内钉置入内固定修复老年骨质疏松性股骨转子间骨折的并发症发生率。 方法：选取禹城市人民医院2012年6月至2014年6月收治的70例老年骨质疏松性股骨转子间骨折患者,采取随机数字表法分为对照组与试验组,每组35例。对照组给予股骨近端髓内钉置入内固定,试验组给予股骨近端防旋髓内钉置入内固定,对比两组患者手术时间、术中出血量、骨折愈合时间、内固定后并发症及髋关节功能Harris评分情况。 结果与结论：两组患者在手术时间上差异有显著性意义,试验组较对照组手术时间短(t=2.88,P < 0.05)。对照组内固定后总并发症发生率为26%,试验组内固定后总并发症发生率为9%,两组比较差异有显著性意义 (χ2=4.77,P < 0.05)。提示股骨近端髓内钉及股骨近端防旋髓内钉置入内固定在修复老年骨质疏松性股骨转子间骨折时均具有创伤小、固定牢固等特点,但与股骨近端髓内钉相比,股骨近端防旋髓内钉在缩短手术时间、降低内固定后并发症方面具有突出的优势。中国组织工程研究杂志出版内容重点：人工关节;骨植入物;脊柱;骨折;内固定;数字化骨科;组织工程全文链接：