The Effects of Bone Screw Configurations on the Interfragmentary Movement in a Long Bone Fixed by a Limited Contact Locking Compression Plate

The locking compression plates (LCP) are efficient tools in open reduction and internal fixation (ORIF), especially in osteoporotic bones. Two important factors of screw density and screw position can affect the functionality of the bone plate. Several studies have assessed the influence of the screw configurations on the bone-plate stiffness, but the effects of screw positions on the interfragmentary strain, εIF of LCP construct have not been investigated yet. In this study, finite element method was used to investigate the influence of screws number and position on the interfragmentary strain of LCP-femur system for a mid-shaft fracture. Results of this study showed that by insertion of screws closer to the fracture site, εIF decreases by 2nd degree polynomial function versus screw position, but by adding the screws from the ends of the plate, or by moving and placing the screws towards the fracture site, the reduction of εIF will be linear. Results of this study were compared and are in agreement with some studies in the literature, even though their scope was mostly stability of the bone-implant system, whereas our scope was focused on the interfragmentary strain.

Additive manufactured osseointegrated screws with hierarchical design

Bone screws are devices used to fix implants or bones to bones.However,conventional screws are mechanically fixed with thread and often face long-term failure due to poor osseointegration.To improve osseointegration,screws are evolving from solid and smooth to porous and rough.Additive manufacturing(AM)offers a high degree of manufacturing freedom,enabling the preparation of predesigned screws that are porous and rough.This paper provides an overview of the problems currently faced by bone screws:long-term loosening and screw breakage.Next,advances in osseointegrated screws are summarized hierarchically(sub-micro,micro,and macro).At the sub-microscale level,we describe surface-modification techniques for enhancing osseointegration.At the micro level,we summarize the micro-design parameters that affect the mechanical and biological properties of porous osseointegrated screws,including porosity,pore size,and pore shape.In addition,we highlight three promising pore shapes:triply periodic minimal surface,auxetic structure with negative Poisson ratio,and the Voronoi structure.At the macro level,we outline the strategies of graded design,gradient design,and topology optimization design to improve the mechanical strength of porous osseointegrated screws.Simultaneously,this paper outlines advances in AM technology for enhancing the mechanical properties of porous osseointegrated screws.AM osseointegrated screws with hierarchical design are expected to provide excellent long-term fixation and the required mechanical strength.

Epdemiology and Treatment of Pseudarthrosis of Long Bones in the Servce D Orthopedics-Traumatology of the University Hospital of Donka

Introduction: Pseudarthrosis (PSA) of the diaphysis of long bones still remains a current problem, despite improvements in the treatment of these fractures. Our study aims to study the epidemiological and therapeutic aspects of PSA of the diaphysis of long bones. Method: This retrospective work concerns 30 cases of non-union of the diaphysis of long bones treated in the orthopedic and trauma surgery department at Donka National Hospital, during a period of 18 months from January 1, 2019 to June 30, 2020. Results: We recruited 30 patients, 80% of whom were male, with an average age of 39.9 years. Public road accidents (AVP) represented the main cause of fractures of the diaphysis of long bones 87%, they were open in 25 cases or 83%. The fractures were located in the middle 1/3 of the diaphysis of the long bones in 50% of cases. Treatment of initial fractures was traditional in 21 cases, orthopedic in 2 cases and surgical in 7 cases. It was aseptic nonunion in 28 cases (93%) and septic nonunion in 2 cases. They were hypertrophic in 7 cases, slightly hypertrophic in 5 cases, oligotrophic in 11 cases, atrophic in 6 cases and with bone defect in 1 case. The treatment was based on osteosynthesis including 16 cases of screwed “PV” plate: 7 cases of centromedullary “ECM” nailing, 2 cases of external fixator, 1 case of broaching and 4 cases of Plastering. The results according to ASAMI criteria on an anatomical level were excellent in 19 cases, good in 3 cases and poor in 3 cases, with a union rate of 76%. And 5 patients undergoing consolidation. Conclusion: Based on the literature data and the experience of our department, the true treatment of PSA requires correct management of the initial fracture without forgetting the interest in preventing AVP which appears to be an element essential, making it possible to reduce the incidence of fractures of the diaphysis.

Mechanical and corrosion properties of partially degradable bone screws made of pure iron and stainless steel 316L by friction welding

This paper reports a series of in vitro, ex vivo and in vivo mechanical and corrosion studies of pin and screw prototype made of friction welded pure iron and 316 L type stainless steel aiming to evaluate the applicability of the partially removable bone screws. Results showed that the pin possesses bending, tensile and torsional strengths of1706±147, 666±7 and 0.34±0.03 MPa, respectively. The pin degraded at an average weight loss rate of 17.15×10-5 g cm-2 day-1 and released Fe ions at an average concentration of 2.38 ppm. Plastic deformation induced by torsion increased the corrosion rate of the pin from 0.0014 to 0.0137 mm year-1.The maximum pull-out load of the screw prototypes was3800 N with a calculated failure strength by shear load equal to22.2 k N which is higher than the strength of the cortical bone.Detailed analysis of the rat's blood cells during 60 days of the pin implantation indicated a normal response with low neutrophils/lymphocytes ratio of 0.3-0.5. Iron ion concentration in the rat's blood slightly increased from 55 to 61 ppm without affecting the tissue recovering and healing phase. Histological evaluation confirmed the presence of macrophage cells as a normal response to the released iron particles around the iron section of the pin.

Improving the fretting biocorrosion of Ti6Al4V alloy bone screw by decorating structure optimised TiO2 nanotubes layer

TiO2 nanotubes(NT)has been demonstrated its potential in orthopaedic applications due to its enhanced surface wettability and bio-osteointegration.However,the fretting biocorrosion is the main concern that limited its successfully application in orthopaedic application.In this study,a structure optimised thin TiO2 nanotube(SONT)layer was successfully created on Ti6Al4V bone screw,and its fretting corrosion performance was investigated and compared to the pristine Ti6Al4V bone screws and NT decorated screw in a bone-screw fretting simulation rig.The results have shown that the debonding TiO2 nanotube from the bone screw reduced significantly,as a result of structure optimisation.The SONT layer also exhibited enhanced bio-corrosion resistance compared pristine bone screw and conventionally NT modified bone screw.It is postulated that interfacial layer between TiO2 nanotube and Ti6Al4V substrate,generated during structure optimisation process,enhanced bonding of TiO2 nanotube layer to the Ti6Al4V bone screws that leading to the improvement in fretting corrosion resistance.The results highlighted the potential SONT in orthopaedic application as bone fracture fixation devices.

Cortical bone trajectory screws in the treatment of lumbar degenerative disc disease in patients with osteoporosis

Lumbar degenerative disc disease(DDD)in the elderly population remains a global health problem,especially in patients with osteoporosis.Osteoporosis in the elderly can cause failure of internal fixation.Cortical bone trajectory(CBT)is an effective,safe and minimally invasive technique for the treatment of lumbar DDD in patients with osteoporosis.In this review,we analyzed the anatomy,biomechanics,and advantages of the CBT technique in lumbar DDD and revision surgery.Additionally,the clinical trials and case reports,indications,advancements and limitations of this technique were further discussed and reviewed.Finally,we concluded that the CBT technique can be a practical,effective and safe alternative to traditional pedicle screw fixation,especially in DDD patients with osteoporosis.

Treatment of Thoracolumbar Vertebrate Fracture by Transpedicular Morselized Bone Grafting in Vertebrae for Spinal Fusion and Pedicle Screw Fixation

To enhance the fusion of graft bone in thoracolumbar vertebrae and minimize the postoperative loss of correction, short-segment pedicle screw fixation was reinforced with posterior moselizee bone grafting in vertebrae for spinal fusion in patients with thoracrolumbar vertebrate fractures. Seventy patients with thoracrolumbar vertebrate fractures were treated by short-segment pedicle screw fixation and were randomly divided into two groups. Fractures in group A （n=20） were rein-forced with posterior morselized bone grafting in vertebrae for spinal fusion, while patients group B （n=50） did not receive the morselized bone grafting for bone fusion. The two groups were compared in terms of kyphotic deformity, anterior vertebral height, instrument failure and neurological functions after the treatment. Frankel grading system was used for the evaluation of neurological evaluation and Denis scoring scale was employed for pain assessment. The results showed that the kyphosis correction was achieved in both group A and group B （group A： 6.4 degree; group B： 5.4 degree）/At the end of follow-up, kyphosis correction was maintained in group A but lost in group B （P=0.0001）. Postoperatively, greater anterior height was achieved in group A than in group B （P〈0.01）. During follow-up study, anterior vertebral height was maintained only in Group A （P〈0.001）. Both group A and group B showed good Denis pain scores （P1 and P2） but group A outdid group B in terms of control of severe and constant pain （P4 and P5）. By Frankel criteria, the changes in neurological functions in group A was better than those of group B （P〈0.001）. It is concluded that reinforcement of short-segment pedicle fixation with morselized bone grafting for the treatment of patients with thoracolumbar vertebrae fracture could achieve and maintain kyphosis correction, and it may also increase and maintain anterior vertebral height. Morselized bone grafting in vertebrae offers immediate spinal stability in patients with thoracolumbar vertebrate fractures, decreases the instrument failure and provides better postoperative pain control than without the morselized bone grafting.

Comparison of Clinical Outcomes of Cortical Bone Trajectory and Traditional Pedicle Screw Fixation in Posterior Lumbar Interbody Fusion

Posterior lumbar interbody fusion (PLIF) is a common surgical procedure and widely used in the treatment of lumbar degenerative disc disorders. Traditionally, posterior lumbar interbody fusion is done by using the traditional pedicle screw (PS) which offers great advantages, but at the same time it has some disadvantages which include the risk of superior facet joint violation and muscle damage. Recently, an alternative method of screw insertion via cortical bone trajectory (CBT) has been invented which has less invasive process and can be placed without the drawbacks associated with the traditional pedicle screw. However, it has to remain an interest whether CBT will provide similar or greater clinical outcomes compared to PS in PLIF. So the main aim of this review is to compare the clinical outcomes of cortical bone trajectory and traditional pedicle screw fixation in posterior lumbar interbody fusion based on the articles published on this topic. Compared to the traditional pedicle screw fixation, PLIF with CBT has similar clinical outcome based on pain intensity, ODI status and JOA score, as well as similar fusion rate and radiological evaluated complication such as loosening of screw. In addition PLIF with CBT has advantages of less facet joint violation, less blood loss, less intraoperative muscle damage and perioperative pain. On the basis of this study, we can suggest that PLIF with CBT can be considered as a reasonable alternative to PS in PLIF.

SEM observation of bone interface of titanium-coated 317L plate screw

The scanning electron microscope (SEM) results of bone interface of titanium-coated 317L plate screw are reported in this article. 317L plate screw had a rough surface composed of sprayed pure titanium which formed a bone/metal interface in biointegration after implanted into the mandible of dog. Though a bone/metal interface in osseointegration was also formed on the surface of uncoated 317L plate screw after implantation, a smal1 space was seen between the bone and surface of the screw, indicating that the tissue compatibility of titanium-coated 317L plate screw may be better than that of the non-coated screw.

Multitrack and multianchor point screw technique combined with the Wiltse approach for lesion debridement for lumbar tuberculosis

BACKGROUND The incidence of lumbar tuberculosis is high worldwide,and effective treatment is a continuing problem.AIM To study the safety and efficacy of the multitrack and multianchor point screw technique combined with the contralateral Wiltse approach for lesion debridement to treat lumbar tuberculosis.METHODS The C-reactive protein(CRP)level,erythrocyte sedimentation rate(ESR),visual analogue scale(VAS)score,oswestry disability index(ODI)and American Spinal Injury Association(ASIA)grade were recorded and analysed pre-and postoperatively.RESULTS The CRP level and ESR returned to normal,and the VAS score and ODI were decreased at 3 mo postoperatively,with significant differences compared with the preoperative values(P<0.01).Neurological dysfunction was relieved,and the ASIA grade increased,with no adverse events.CONCLUSION The multitrack,multianchor point screw fixation technique combined with the contralateral Wiltse approach for debridement is an effective and safe method for the treatment of lumbar tuberculosis.

Atlantoaxial joint fusion using anterior transarticular screw fixation and bone grafting for atlantoaxial joint instability

Objective To evaluate the clinical application of atlantoaxial joint fusion using anterior transarticular screw fixation and bone grafting for atlantoaxial joint instability. Methods Twenty-three cases of atlantoaxial joint instability were

骨水泥强化椎弓根螺钉固定对腰椎椎管狭窄伴骨质疏松患者椎间融合率的影响及其远期效果分析

目的探讨骨水泥强化椎弓根螺钉固定对腰椎椎管狭窄伴骨质疏松患者椎间融合率的影响及其远期效果。方法选取本院2019年7—12月收治的52例腰椎椎管狭窄合并骨质疏松患者,随机分为实验组和对照组,每组26例,对两组患者施行椎板减压、椎间盘摘除、椎间植骨融合、椎弓根钉内固定术治疗。实验组采用骨水泥强化椎弓根钉固定,对照组采用普通椎弓根钉固定。记录患者疗效相关评分,术后半年进行腰椎X光检查了解椎间融合情况。结果两组患者在术前及术后2周的VAS评分、JOA评分及ODI评分差异并无统计学意义(P>0.05);而术后3个月时起至术后2年的VAS评分、JOA评分及ODI评分对比具有明显差异,具有统计学意义(P<0.05);术后半年通过Bridwell标准判断两组患者的椎间融合率时也发现两者具有显著差异,实验组患者椎间融合率明显高于对照组,且差异有统计学意义(P<0.05)。结论骨水泥强化椎弓根钉固定技术能有效提高椎体间植骨融合率,患者术后两年疗效令人满意,尽管目前对该技术的安全性仍有部分争议,但总的来说是利大于弊的,值得在临床上进一步推广。

Clinical Outcomes and Prehabilitation Strategies of Patients Treated with Cement-Screw Technique for Tibial Defects in Total Knee Arthroplasty

Objective: To investigate the clinical efficacy of the cement-screw technique in repairing tibial plateau bone defects in total knee arthroplasty (TKA) recipients and summarize the preoperative prehabilitation strategies for such surgeries. Methods: A total of 33 TKA recipients (45 knees) in our department underwent repair of unilateral or bilateral tibial defects using the cement-screw technique. The subjects were divided into two groups based on the differences in preoperative interventions. The control group received routine preoperative health education according to the consensus, while the observation group received instructive and standardized prehabilitation exercises for four weeks in addition to the routine education. Scale scores, intraoperative parameters, and postoperative recovery indicators were recorded at different time pointsand subjected to statistical analysis for intra-group and inter-group differences. All subjects underwent long-term follow-up for at least 24 months. Results: Within each group at different time points, there were statistically significant differences in VAS, ROM, and HSS scores (p Conclusions: Cement-screw technique for repairing tibial plateau bone defects in TKA recipients can significantly relieve pain, and improve joint function. Prehabilitation can improve preoperative rehabilitation reserves in these patients, accelerate postoperative recovery, and contribute to better short-term clinical outcomes.

皮质骨通道螺钉技术在腰椎退变性疾病中的应用效果

目的:探讨皮质骨通道螺钉技术在老年腰椎退行性疾病患者中的应用效果。方法:选取2021年7月—2023年7月中国人民解放军联勤保障部队第926医院收治的腰椎退变性疾病患者64例作为研究对象,采用随机数字表法分为对照组以及观察组,各32例。对照组实施椎弓根螺钉内固定术治疗,观察组实施皮质骨通道螺钉技术治疗。比较两组手术相关指标、疼痛情况、腰椎功能。结果:观察组手术时间短于对照组,切口长度小于对照组,术中出血量、术后引流量少于对照组,差异有统计学意义(P<0.001)。治疗前,两组视觉模拟评分法(VAS)、日本骨科协会评估治疗分数(JOA)评分比较,差异无统计学意义(P>0.05)。治疗后6个月,两组VAS评分降低,观察组低于对照组,差异有统计学意义(P<0.05);两组JOA评分升高,差异有统计学意义(P<0.05);两组JOA评分比较,差异无统计学意义(P>0.05)。结论:皮质骨通道螺钉技术在老年腰椎退行性疾病患者中的应用效果显著,可缩短手术时间,减小手术切口,减少术中出血量与术后引流量,减轻疼痛,且不会影响腰椎功能。

ERAS在双平面机器人辅助经皮骶髂关节螺钉固定治疗骶骨骨折中的应用

目的评价加速康复外科(ERAS)在双平面机器人辅助经皮骶髂关节螺钉固定治疗骶骨骨折中的临床效果。方法选取2018年12月至2020年12月内蒙古医科大学附属医院采用双平面机器人辅助经皮骶髂关节螺钉固定治疗的24例骶骨纵形骨折患者作为研究对象,随机分为ERAS组与常规组(n=12),其中常规组采取常规围手术期管理模式,ERAS组在常规管理基础上实施ERAS精细化围手术期管理方案,对两组患者围手术期指标、影像学结果和疗效指标进行对比分析。结果对两组患者螺钉置入位置进行影像学检查(X线、CT扫描),均达到满意程度;Matta影像评分两组相近(P>0.05)。ERAS组术后2 d疼痛视觉模拟量表评分、术后3 d Braden压疮评分和末次随访Majeed评分均优于常规组,住院时间短于常规组,两组比较,差异具有统计学意义(P<0.05)。结论在机器人辅助经皮骶髂关节螺钉固定围手术期管理中运用ERAS理念,疼痛缓解更加有效、压疮风险更低、住院时间更短,更有利于骶骨骨折患者术后骨盆功能恢复,可在脊柱外科机器人手术中推广和应用。

三维组架螺钉与环形钢板治疗Sanders ⅢAB型跟骨骨折的有限元分析

目的 探讨三维组架螺钉与环形钢板对SandersⅢAB型跟骨骨折的生物力学稳定性的影响。方法 收集1名26岁志愿者跟骨CT和MRI数据,建立SandersⅢAB型跟骨骨折的三维有限元模型,分别使用三维组架螺钉与环形钢板固定,施加700 N纵向载荷,比较不同模型骨块及内固定应力与位移变化情况。结果 在700 N纵向载荷下,两组模型骨块最大位移以及骨块与内固定最大应力均集中于后距关节面内固定与骨折线相交处。三维组架螺钉模型与环形钢板模型骨块整体位移相近。相较于环形钢板模型,三维组架螺钉模型骨块及内固定的最大应力和平均应力更小,位移与应力变化情况更接近完整跟骨模型。结论 SandersⅢAB型跟骨骨折固定时,三维组架螺钉与环形钢板两种固定方式均能提供良好稳定性。三维组架螺钉的生物力学性能优于环形钢板,更符合生物力学特点。

新型变径全皮质骨螺纹螺钉设计以及在腰椎改良皮质骨轨迹的应用

目的 设计一款用于改良皮质骨轨迹(modified cortical bone trajectory,MCBT)置钉技术的新型变径全皮质骨螺纹螺钉,验证新型变径全皮质骨螺纹螺钉在MCBT技术中的力学特性。方法 根据MCBT技术,设计螺钉的螺距为2 mm,全长45 mm,粗杆部分直径恒定5.5 mm,细杆部分直径为4.0~4.5 mm变径,粗杆和细杆连接的变径位置长度为2 mm。从变径位置、螺纹深度、螺纹类型3个方面设置参数,开展三因素三水平L9正交试验,并建立螺钉模型。基于有限元方法对设计的螺钉进行扭转、弯曲和拔出力计算,对结果进行极差分析并确定螺钉模型。建立骨质疏松标本L4椎体三维模型,并按照MCBT技术置钉。比较新型变径全皮质骨螺纹螺钉和常规非变径全皮质骨螺纹螺钉抗拔出力。结果 通过极差分析,得出螺钉6(变径位置距离螺钉头部24 mm,螺纹深度0.7 mm,螺纹类型为45°对称螺纹)为最优螺钉。在抗拔出力方面,第6款变径全皮质骨螺纹螺钉比4.5 mm常规非变径全皮质骨螺纹螺钉提高13.1%,与5.5 mm常规非变径全皮质骨螺纹螺钉相比不具有统计学差异。结论 螺钉变径位置对螺钉拔出力影响最小,螺纹类型对拔出力影响最大,螺纹深度对扭转、弯曲影响最大。与常规非变径全皮质骨螺纹螺钉相比,变径全皮质骨螺纹螺钉前端较细,可避免进钉点发生劈裂;螺钉后端直径较粗,具有较好的抗拔出力性能。研究结果为MCBT技术的临床应用提供新的理论基础。

伤椎置钉结合经椎弓根打压植骨治疗Ⅲ期Kümmell病:快速恢复脊柱稳定

背景:Ⅲ期Kümmell病的特点是椎体压缩程度高且伴有后壁缺损,患者多为伴有严重骨质疏松症且合并多种内科疾病的老年人,临床上一些手术方式往往风险较高,存在争议。目的:探讨伤椎置钉结合经椎弓根打压植骨治疗Ⅲ期Kümmell病的临床疗效。方法:回顾性分析在2016年5月至2021年8月收治的Ⅲ期Kümmell病患者行伤椎置钉结合经椎弓根打压植骨治疗的临床资料。比较手术前后患者的疼痛目测类比评分、Oswestry功能障碍指数、伤椎前缘高度、后凸Cobb角和美国脊髓损伤协会(ASIA)脊髓功能分级来评价手术效果;记录患者手术时间、术中出血量及并发症情况;末次随访时根据CT扫描评估植骨椎体的骨性愈合情况。结果与结论:①共纳入26例患者,其中男7例,女19例;年龄62-81岁,平均(69.7±4.8)岁;随访时间18-60个月,平均(35.1±8.9)个月;平均手术时间及术中出血量分别为133.5 min(100-165 min)、285.3 mL(210-350 mL);②与术前相比,患者在术后1周和末次随访时的目测类比评分及Oswestry功能障碍指数均明显降低;③术后1周平均矫正伤椎前缘高度和后凸Cobb角分别为(9.0±0.7)mm和(16.2±1.0)°,随访期内矫正的高度和角度分别丢失(5.1±0.3)mm和(8.0±0.4)°;④14例(54%)术前ASIA分级为D级的患者在末次随访时均恢复至为E级,CT扫描可见所有患者植骨椎体均实现良好的骨性愈合;⑤共7例(27%)患者发生并发症,2例患者围术期发生坠积性肺炎,2例患者因浅表伤口组织液化延迟愈合,3例患者在随访期内发生内固定邻近节段椎体骨折;⑥提示伤椎置钉结合经椎弓根打压植骨治疗Ⅲ期Kümmell病能够快速恢复脊柱稳定,有效缓解患者疼痛并改善神经功能,是一种可以选择的有效且相对微创的治疗方式。

新型骨水泥桥接螺钉系统联合PVP治疗伴IVC的SCOVF患者的效果

目的:探讨新型骨水泥桥接螺钉系统联合经皮椎体成形术(PVP)治疗伴椎体内真空裂隙(IVC)的症状性陈旧性胸椎骨质疏松性骨折(SCOVF)患者的效果。方法:回顾性分析广西壮族自治区人民医院2018年1月—2020年1月收治的120例伴IVC的SCOVF患者,纳入患者全部为绝经期女性患者,均行新型骨水泥桥接螺钉系统联合PVP治疗,且在手术过程中取骨质测量其骨微结构、骨硬度及弹性模量,以了解人体骨质疏松症发生发展过程中其骨微观结构及其力学特性的变化情况。并观察患者椎体指数(VBI)、椎体角(VBA)、双节段Cobb角(BCA)、视觉模拟评分(VAS)、Oswestry功能障碍指数(ODI)、健康状况及骨水泥移位发生情况。结果:120例患者骨微结构指标骨小梁厚度(Tb.Th)为(0.20±0.05)%,骨体积分数(BV/TV)为(0.19±0.04)%,结构模型指数(SMI)为(1.47±0.09)mm,骨小梁间隔(Tb.Sp)为(0.72±0.03)mm,骨硬度为(0.16±0.03),弹性模量为(1.96±0.05)。术前、术后1 d及术后3年,120例患者的VBI、VBA及BCA比较,差异有统计学意义(P<0.05)。随着时间的延长,患者VAS评分及ODI评分均逐渐降低,且术后3年患者的VAS评分及ODI评分低于术后1 d及术前,术后1 d患者的VAS评分及ODI评分低于术前,差异有统计学意义(P<0.05)。术后3年,120例患者健康调查简表(SF-36)评分均高于术前,差异有统计学意义(P<0.05)。随访3年,120例患者中无人发生骨水泥移位并发症。结论:新型骨水泥桥接螺钉系统联合PVP治疗伴IVC的SCOVF患者固定复位效果满意,疼痛缓解明显,功能恢复良好,术后并无骨水泥异位发生。

DXA、QCT、DECT应用于骨质疏松性椎体压缩性骨折内固定治疗的研究进展

骨质疏松性椎体压缩性骨折(OVCFs)是一种中老年人常见的骨骼疾病,严重影响患者的生活质量和健康。在不稳定型OVCFs的治疗中,椎弓根螺钉内固定术能为椎体提供强力有效的支持,已成为重要的手术选择。然而,严重的骨质疏松会使内固定治疗失效率高。准确测量患者的骨密度评估骨质疏松情况对于手术成功和临床结果有较大影响。目前最常用的骨密度评估技术有双能X射线吸收法(DXA)、定量计算机断层扫描(QCT)和双能量CT(DECT)。该文综述了此3种技术在OVCFs的应用状况及优劣势的研究进展。