A Lateral Opening Injection Tool Used In Percutaneous Vertebroplasty To Treat Asymptomatic Osteoporotic Vertebral Burst Fractures: A Retrospective Study In 66 Cases

Abstract Background: This study aimed to assess the results of percutaneous vertebroplasty (PVP) with a lateral opening injection tool for treating asymptomatic osteoporotic vertebral burst fractures (OVBFs) patients.Methods: 66 patients diagnosed with acute asymptomatic OVBFs with a spinal canal occupational ratio under 20% were treated with bilateral PVP using a lateral opening injection tool in our study. The related clinical outcomes and images were assessed, including Visual Analogue Scale (VAS), vertebral height (VH) ratio (=fractured VH/ adjacent nonfractured VH), the bone union of the fractured vertebral posterior wall, bone cement distribution, and complications.Results: The VAS scores were 3.80±0.40 at postoperative one day and 0.59±0.41 at last follow-up, significantly lower than 8.37±0.49 at pre-operation (P<0.05). The vertical distribution of bone cement in 60 cases contacted the upper and lower endplates of fractured vertebras. There was no leakage of bone cement in the spinal canal or displacement of posterior wall fracture to the spinal canal in all cases. There was asymptomatic cement leakage in 7 cases. The mean anterior, middle and posterior vertebral height ratios were significantly increased after PVP compared with preoperative values in all patients (P<0.05). At 6 months follow-up, there was no significant height loss of the vertebral body. Three months postoperatively, the posterior wall of fractured vertebral bodies was healed in all cases according to CT images. Conclusions: PVP using a lateral opening injection tool was effective and safe for treating asymptomatic OVBF patients.

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Percutaneous vertebroplasty versus kyphoplasty for the treatment of neurologically intact osteoporotic Kümmell’s disease

BMC Surgery ◽

10.1186/s12893-021-01057-x ◽

2021 ◽

Vol 21 (1) ◽

Author(s):

Shou-qian Dai ◽

Rong-qing Qin ◽

Xiu Shi ◽

Hui-lin Yang

Keyword(s):

Blood Loss ◽

Bone Cement ◽

Percutaneous Vertebroplasty ◽

Cement Leakage ◽

Intraoperative Blood Loss ◽

Surgical Time ◽

Significant Difference ◽

Neurologically Intact ◽

Operation Cost

Abstract Background Percutaneous vertebroplasty (PVP) and kyphoplasty (PKP) have been widely used to treat neurologically intact osteoporotic Kümmell’s disease (KD), but it is still unclear which treatment is more advantageous. Our study aimed to compare and investigate the safety and clinical efficacy of PVP and PKP in the treatment of KD. Methods The relevant data that 64 patients of neurologically intact osteoporotic KD receiving PVP (30 patients) or PKP (34 patients) were analyzed. Surgical time, operation costs, intraoperative blood loss, volume of bone cement injection, and fluoroscopy times were compared. Occurrence of cement leakage, transient fever and re-fracture were recorded. Universal indicators of visual analogue scale (VAS) and Oswestry disability index (ODI) were evaluated separately before surgery and at 1 day, 6 months, 1 year, 2 years and the final follow-up after operation. The height of anterior edge of the affected vertebra and the Cobb’s angle were assessed by imaging. Results All patients were followed up for at least 24 months. The volume of bone cement injection, intraoperative blood loss, occurrence of bone cement leakage, transient fever and re-fracture between two groups showed no significant difference. The surgical time, the operation cost and fluoroscopy times of the PKP group was significantly higher than that of the PVP group. The post-operative VAS, ODI scores, the height of the anterior edge of the injured vertebrae and kyphosis deformity were significantly improved in both groups compared with the pre-operation. The improvement of vertebral height and kyphosis deformity in PKP group was significantly better than that in the PVP group at every same time point during the follow-up periods, but the VAS and ODI scores between the two groups showed no significant difference. Conclusion PVP and PKP can both significantly alleviate the pain of patients with KD and obtain good clinical efficacy and safety. By contrast, PKP can achieve better imaging height and kyphosis correction, while PVP has the advantages of shorter operation time, less radiation volume and operation cost.

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Microsurgical interlaminary vertebro- and kyphoplasty for severe osteoporotic fractures

Journal of Neurosurgery Spine ◽

10.3171/spi.2004.100.1.0032 ◽

2004 ◽

Vol 100 (1) ◽

pp. 32-37 ◽

Cited By ~ 12

Author(s):

Bronek M. Boszczyk ◽

Michael Bierschneider ◽

Katharina Schmid ◽

Andreas Grillhösl ◽

Björn Robert ◽

...

Keyword(s):

Spinal Canal ◽

Osteoporotic Fractures ◽

Posterior Wall ◽

Cement Leakage ◽

Decompressive Surgery ◽

Content Type ◽

Osteoporotic Vertebral Fractures ◽

Four Levels ◽

Fine Print

Object. Percutaneous vertebro- and kyphoplasty have become established methods for the treatment of uncomplicated osteoporotic vertebral fractures. In the setting of severe fractures involving fragmentation of the posterior wall and neural compromise, however, decompressive surgery cannot be performed and epidural cement leakage is poorly controlled. A microsurgical interlaminary approach for vertebro- and kyphoplasty was developed to allow spinal decompression and control of the spinal canal during augmentation. Methods. Interlaminary vertebro- or kyphoplasty was performed in 24 patients with osteoporotic fractures involving neural compression or posterior wall fragmentation. After unilateral microsurgical fenestration, decompression of the spine, and gentle mobilization of the thecal sac, vertebro- or kyphoplasty was performed directly through the posterior wall of the fractured vertebral body. Cement was injected under microscopic and fluoroscopic control, with the option of immediate exploration of the exposed spinal canal. Thirty-four levels (T-8 to L-5) were treated. Mean blood loss was less than 100 ml and augmentation added 10 to 40 minutes to the entire procedure. Cement leakage associated with the kyphoplasty procedure was less than that in vertebroplasty. There were no major complications. One patient was lost to follow up. Clinical outcome was good or excellent in 17 of the 23 patients available for follow-up (1 to 31—month) evaluation. Conclusions. The present microsurgical interlaminary approach for vertebro- and kyphoplasty enables treatment of severe osteoporotic fractures involving fragmentation of the posterior wall and neural compromise. Decompressive surgery is possible and the risk of epidural cement leakage is controlled intraoperatively. This technique can be regarded as a procedure on the treatment continuum between percutaneous augmentation and conventional open reconstruction.

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Comparison of Unipedicular and Bipedicular Percutaneous Kyphoplasty for Kummell's Disease

10.21203/rs.3.rs-122096/v1 ◽

2020 ◽

Author(s):

Dan Pan ◽

Xiaojie Ouyang ◽

Qinghua Huang ◽

Dayong Chen

Keyword(s):

Bone Cement ◽

Operative Time ◽

Cement Leakage ◽

Vertebral Height ◽

Kyphotic Angle ◽

Injection Volume ◽

Kummell’S Disease ◽

Kümmell’S Disease ◽

Better Than

Abstract Background: Percutaneous kyphoplasty (PKP) is effective for the treatment of Kummell's disease. However, controversy remains regarding whether a unipedicular or bipedicular PKP is superior.Methods: A retrospective study was performed to review 40 patients with stage I and II Kummell's disease who underwent PKP in our hospital from January 2015 to June 2018. Based on the transpedicular approach of PKP, those patients were randomly divided into unipedicular group (n = 19) and bipedicular group (n = 21) . Operative time, bone cement injection volume and cement leakage rate were compared in the two groups. Pre- and post-operative visual analogue score (VAS), local kyphotic angle and average vertebral height were also evaluated.Results: All patients underwent surgery successfully. Compared with preoperative condition, VAS was significantly decreased at 1 day after operation and the last follow-up in both groups (P < 0.05) , and local kyphotic angle and average vertebral height were restored markedly (P < 0.05). Operative time of both groups had no significant difference (P > 0.05). Bone cement injection volume was larger in bipedicular group (P < 0.05). At 1 day after operation and the last follow-up , the local kyphotic angle and average vertebral height in bipedicular group were restored better than those in unipedicular group (P < 0.05). There were 4 cases of cement leakage in both groups, with leakage rates of 21.1% and 19.0%, respectively, and the difference was not significant (P > 0.05).Conclusion: Both unipedicular and bipedicular PKP are effective for treating patients with stage I and II Kummell's disease, while postoperative pain relief and imaging results in bipedicular group were better than those in unipedicular group.

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Vesselplasty versus vertebroplasty in the treatment of osteoporotic vertebral compression fractures with posterior wall rupture

Journal of International Medical Research ◽

10.1177/03000605211066303 ◽

2021 ◽

Vol 49 (12) ◽

pp. 030006052110663

Author(s):

Kai Xu ◽

Ya-Ling Li ◽

Song-Hua Xiao

Keyword(s):

Pain Relief ◽

Bone Cement ◽

Spinal Canal ◽

Operation Time ◽

Posterior Wall ◽

Cement Leakage ◽

Leakage Rate ◽

Vertebral Compression Fractures ◽

Compression Fractures ◽

Osteoporotic Compression Fractures

Objective This study was performed to compare the effectiveness and safety of vesselplasty versus vertebroplasty in the treatment of osteoporotic compression fractures with posterior wall rupture. Methods Patients who underwent treatment of a single osteoporotic vertebral compression fracture with posterior wall rupture from January 2016 to February 2020 were retrospectively reviewed. They were divided into a vesselplasty group (n = 17) and a vertebroplasty group (n = 43). Pain relief, radiographic outcomes, and bone cement leakage were compared between the two groups. Results There were no significant differences in the operation time, postoperative pain relief, vertebral compression recovery, or local Cobb angle improvement between the two groups. However, the overall bone cement leakage rate (29.4% vs. 67.4%) and spinal canal leakage rate (0.0% vs. 30.2%) were significantly lower in the vesselplasty group than vertebroplasty group. Conclusions Vesselplasty offers similar pain relief and vertebral compression recovery but lower spinal canal leakage compared with vertebroplasty. Vesselplasty is thus a better option than vertebroplasty for patients with osteoporotic compression fractures with posterior wall rupture.

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Comparison of early results of Vesselplasty and percutaneous vertebroplasty in the treatment of elderly patients with osteoporotic vertebral compression fracture

10.21203/rs.3.rs-17452/v1 ◽

2020 ◽

Author(s):

jun mei ◽

Dou Wu ◽

Xu Xiao Song ◽

Qiang Liu

Keyword(s):

Bone Cement ◽

Operative Time ◽

Percutaneous Vertebroplasty ◽

Cement Leakage ◽

Postoperative Recovery ◽

Leakage Rate ◽

Vertebral Compression Fractures ◽

Vertebral Height ◽

Compression Fractures ◽

Vas Score

Abstract Objective To investigate the early clinical effect of vesselplasty and percutaneous vertebroplasty in the treatment of elderly patients osteoporotic vertebral compression fractures. MethodsA retrospective analysis was performed on 22 patients (10 males and 12 females, aged 60~85 years old （73.1±9.6）with osteoporosis fracture treated by vesselplasty in Shanxi Bethune Hospital from March 2017 to December 2018..During the same period, 56 patients (20 males and 36 females, aged 60-80 years (70.3±9.4) were treated with percutaneous vertebroplasty (PVP) for osteoporosis fractures.Preoperative and postoperative Visual Analogue Score (VAS), operative time, intraoperative bone cement leakage, preoperative and postoperative vertebral body anterior margin height were recorded to evaluate the clinical efficacy.ResultsIn the vesselplasty group, preoperative VAS score was 7.9±0.9, postoperative VAS score was 3.8±0.8, postoperative recovery rate of vertebral height was 19.9%±19.1%, operative time (33.6±6.2)min, and bone cement leakage was observed in 3 cases.In the PVP group,preoperative VAS score was 7.9±0.9, postoperative VAS score was 3.7±0.8, postoperative recovery rate of vertebral height was 18.8%±18.2%, operative time (35.8±6.6)min, and bone cement leakage was observed in 15 cases.Compared with the PVP group（26.8%, the bone cement leakage rate of the vesselplasty group （13.6%）was significantly reduced, and the difference was statistically significant, but there was no significant difference in other data. ConclusionBoth vesselplasty and percutaneous vertebroplasty can achieve satisfactory early clinical efficacy in the treatment of senile osteoporosis vertebral compression fractures. Bone cement leakage rate of vesselplasty is smaller and it is safer.

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Comparison of percutaneous vertebroplasty with a side-hole push rod and conventional percutaneous vertebroplasty for the treatment of OVCFs

10.21203/rs.3.rs-32093/v1 ◽

2020 ◽

Author(s):

Zhengshuai Jin ◽

Hailong Zhou ◽

Xuefei Yan ◽

Chunming Wang ◽

Yuanqing Mao ◽

...

Keyword(s):

Bone Cement ◽

Operative Time ◽

Percutaneous Vertebroplasty ◽

Cement Leakage ◽

Vertebral Compression Fractures ◽

Postoperative Results ◽

Injection Volume ◽

Side Hole ◽

Cement Injection

Abstract ObjectiveThe aim of this study was to compare the clinical efficacy of percutaneous vertebroplasty with a side-hole push rod (modified PVP) and conventional PVP in treating osteoporotic vertebral compression fractures (OVCFs).Materials and methodsThis study included 69 patients with 1-level OVCFs. Perioperative indicators, including the operative time, cement injection volume, cement leakage rate, and distribution of cement in the fractured area, were analysed. The visual analogue scale (VAS) and Oswestry disability index (ODI) were administered pre- and postoperatively.ResultsNo significant differences were observed in the operative time or cement injection volume between the two groups (p > 0.05). The total diffusion score of bone cement in the PVP group was significantly lower than that in the modified PVP group (p < 0.05). Compared with the conventional PVP group, the modified PVP group had a significantly lower VAS score at 3 days postoperatively (p < 0.05). There were no differences in the VAS or ODI scores between the two groups at the last follow-up (p > 0.05). Bone cement leakage was observed in 15 cases in the conventional PVP group (15/32) and in 9 cases in the modified PVP group (9/37).ConclusionThe modified version of PVP provides sufficient cement to fill the fractured area and is associated with a lower incidence of cement leakage and undesired postoperative results than is conventional PVP, indicating that modified PVP is a safe and effective new technique for the treatment of OVCFs.

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Analysis of the effect of percutaneous vertebroplasty in the treatment of thoracolumbar Kümmell’s disease with or without bone cement leakage

BMC Musculoskeletal Disorders ◽

10.1186/s12891-020-03901-2 ◽

2021 ◽

Vol 22 (1) ◽

Author(s):

Ya-Ping Xiao ◽

Ming-Jian Bei ◽

Cui-Qing Yan ◽

Jian-Zhong Chang

Keyword(s):

Visual Analogue Scale ◽

Cobb Angle ◽

Bone Cement ◽

Analogue Scale ◽

Percutaneous Vertebroplasty ◽

Cement Leakage ◽

Mineral Density ◽

Kummell’S Disease ◽

Kümmell’S Disease

Abstract Background Bone cement leakage is a major complication in the treatment of percutaneous vertebroplasty for Kümmell’s disease, and the focus of close attention during the surgery. The purpose of this article was to investigate the clinical outcomes of Kümmell’s disease treated by percutaneous vertebroplasty with or without bone cement leakage. Methods A total of 64 patients with Kümmell’s disease from December 2016 to February 2018 treated by percutaneous vertebroplasty were included in the study. After the treatment, 32 cases were respectively divided into two groups according to X-ray examination of bone cement leakage: leakage group and non-leakage group. Preoperative course, age, sex, bone mineral density, damaged segment, anterior vertebral height, vertebral compression rate, Cobb angle, visual analogue scale and Oswestry dysfunction index were compared between the two groups. After surgery, the amount of bone cement injected, operation time, adjacent vertebral refracture rate, visual analogue scale, Oswestry dysfunction index, the recovery value of vertebral anterior height and the improvement value of Cobb angle were compared between the two groups. Results The course, age and Cobb angle of the leakage group were significantly greater than those of the non-leakage group (P< 0.05, respectively). The height of anterior vertebral margin and bone mineral density in the leakage group were significantly lower than those in the non-leakage group (P< 0.05, respectively). The two groups were followed up for at least 24 months. The amount of bone cement injected was significantly greater in the leakage group than in the non-leakage group (P=0.000). Visual analogue scale and Oswestry dysfunction index of the two groups on the second day after surgery and at the last follow-up were significantly lower than these before surgery (P< 0.05, respectively), but there was no significant difference between the two groups. In the leakage group, the recovery value of the anterior edge height of the injured vertebra and the improvement value of the Cobb angle on the second day after surgery and at the last follow-up were significantly improved compared with the non-leakage group (P< 0.05, respectively). Conclusion Percutaneous vertebroplasty is an effective and minimally invasive treatment for Kümmell’s disease. The leakage group had longer course, older age, more serious kyphotic deformity, vertebral compression and osteoporosis, and higher amount of bone cement injected than these of the non-leakage group. However, there were not significant differences in the rate of adjacent vertebral refractures, visual analogue scale and Oswestry dysfunction index between the two groups. Therefore, the bone cement leakage does not affect the surgical effect.

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Percutaneous vertebroplasty versus kyphoplasty for the treatment of neurologically intact osteoporotic Kümmell’s disease

10.21203/rs.3.rs-97667/v1 ◽

2020 ◽

Author(s):

Shouqian Dai ◽

Rongqing qin ◽

xiu shi ◽

Hui-lin Yang

Keyword(s):

Blood Loss ◽

Bone Cement ◽

Clinical Efficacy ◽

Percutaneous Vertebroplasty ◽

Cement Leakage ◽

Intraoperative Blood Loss ◽

Surgical Time ◽

Significant Difference ◽

Neurologically Intact

Abstract Background: Percutaneous vertebroplasty (PVP) and kyphoplasty (PKP) have been widely used to treat neurologically intact osteoporotic Kümmell’s disease (KD), but it is still unclear which treatment is more advantageous. Our study aimed to compare and investigate the safety and clinical efficacy of PVP and PKP in the treatment of KD.Methods: The relevant data that 64 patients of neurologically intact osteoporotic KD receiving PVP (30 patients) or PKP (34 patients) were analyzed. Surgical time, operation costs, intraoperative blood loss, volume of bone cement injection, and fluoroscopy times were compared. Occurrence of cement leakage, transient fever and re-fracture were recorded. Universal indicators of visual analogue scale (VAS) and Oswestry disability index (ODI) were evaluated separately before surgery and at 1 day, 6 months, 1 year, 2 years and the final follow-up after operation. The height of anterior edge of the affected vertebra and the Cobb’s angle were assessed by imaging. Results: All patients were followed up for at least 24 months. The volume of bone cement injection, intraoperative blood loss, occurrence of bone cement leakage, transient fever and re-fracture between two groups showed no significant difference. The surgical time, the operation cost and fluoroscopy times of the PKP group was significantly higher than that of the PVP group. The post-operative VAS, ODI scores, the height of the anterior edge of the injured vertebrae and kyphosis deformity were significantly improved in both groups compared with the pre-operation. The improvement of vertebral height and kyphosis deformity in PKP group was significantly better than that in the PVP group at every same time point during the follow-up periods, but the VAS and ODI scores between the two groups showed no significant difference.Conclusion: PVP and PKP can both significantly alleviate the pain of patients with KD and obtain good clinical efficacy and safety. By contrast, PKP can achieve better imaging height and kyphosis correction, and can be recommended as a preferred treatment options for KD.

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The Effect of Bone Cement Distribution on the Outcome of Percutaneous Vertebroplasty: A Case Cohort Study

10.21203/rs.3.rs-27528/v1 ◽

2020 ◽

Author(s):

Lei Tan ◽

Bingtao Wen ◽

Zhaoqing Guo ◽

Zhongqiang Chen

Keyword(s):

Bone Cement ◽

Vertebral Body ◽

Percutaneous Vertebroplasty ◽

Vertebral Height ◽

Significant Difference ◽

Cement Distribution ◽

Post Operation ◽

Group A ◽

Group B

Abstract Background: To analyze the effect of different types of bone cement distribution after percutaneous vertebroplasty (PVP) in patients with osteoporotic vertebral compression fracture (OVCF). Methods: 137 patients withsinglelevelOVCF who underwent PVP were retrospectively analyzed. The patients were divided into two groups according to bone cementdistribution. Group A:bone cement contacted both upper and lower endplates; Group B: bone cement missed at least one endplate. Group Bwas divided into 3 subgroups. Group B1: bone cement only contacted the upper endplates; Group B2: bone cement only contacted the lower endplates; Group B3: bone cement only located in the middle of vertebral body. The visual analogue scale (VAS) scoreat 24 hours post operation and last follow-up, anterior vertebral height restoration ratio (AVHRR), anterior vertebral height loss ratio (AVHLR) and vertebral body recompression ratewere compared. Results: 24 hours post operation, the pain of all groups were significantly improved. At the last follow-up, the VAS score of group A was lower than that of group B. There were 9 cases (6.6%) of cement leakage, 4 cases (6.9%) in group A and 5 cases (6.3%) in group B. At the last follow-up, there were 16 cases (11.7%) of vertebral body recompression, including 3 cases (5.2%) in group A and 13 cases (16.5%) in group B. There was no significant difference in AVHRR between two groups. At the last follow-up, AVHLR in group B was higher than that in group A. In subgroup analysis, there was no significant difference in VAS score,vertebral recompression rate, AVHRR or AVHLR.Conclusions: If the bone cement fully contacted both the upper and lower endplates, it can better restore the strength of the vertebral bodyand maintain the height of the vertebral body, reduce the risk of the vertebral body recompression and long term pain.

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A mysterious risk factor for bone cement leakage into the spinal canal through the Batson vein during percutaneous kyphoplasty: a case control study

BMC Musculoskeletal Disorders ◽

10.1186/s12891-019-2807-6 ◽

2019 ◽

Vol 20 (1) ◽

Cited By ~ 1

Author(s):

Shuai Zhang ◽

Gao Ju Wang ◽

Qing Wang ◽

Jin Yang ◽

Shuang Xu ◽

...

Keyword(s):

Bone Cement ◽

Vertebral Body ◽

Spinal Canal ◽

Three Dimensional ◽

Posterior Wall ◽

Cement Leakage ◽

Vertebral Compression Fractures ◽

Thoracic Vertebrae ◽

Percutaneous Kyphoplasty ◽

Thoracic Spinal

Abstract Background Percutaneous kyphoplasty (PKP) can effectively treat osteoporotic vertebral compression fractures (OVCFs). Although satisfactory clinical outcomes can be achieved, bone cement leakage remains a primary complication of PKP. Previous studies have found many high risk factors for bone cement leakage into the spinal canal; however, less attention to the posterior wall morphologies of different vertebral bodies may be one reason for the leakage. Here, we investigated the effect of posterior vertebral wall morphology in OVCF patients on bone cement leakage into the spinal canal during PKP. Methods Ninety-eight OVCF patients with plain computed tomography (CT) scans and three-dimensional (3D) reconstruction images from T6 to L5 were enrolled. 3D-CT and multiplanar reconstructions (MPR) were used to measure the concave posterior vertebral wall depth (PVWCD) and the corresponding midsagittal diameter of the nonfractured vertebral body (VBSD), and the PVWCD/VBSD ratio was calculated. All subjects were divided into the thoracic or lumbar groups based on the location of the measured vertebrae to observe the value and differences in the PVWCD between both groups. The differences in PVWCD and PVWCD/VBSD between the thoracic and lumbar groups were compared. Three hundred fifty-seven patients (548 vertebrae) who underwent PKP within the same period were also divided into the thoracic and lumbar groups. The maximal sagittal diameter (BCSD), the area of the bone cement intrusion into the spinal canal (BCA), and the spinal canal encroachment rate (BCA/SCA × 100%) were measured to investigate the effect of the thoracic and lumbar posterior vertebral wall morphologies on bone cement leakage into the spinal canal through the Batson vein during PKP. Results The PVWCDs gradually deepened from T6 to T12 (mean, 4.6 mm); however, the values gradually became shallower from L1 to L5 (mean, 0.6 mm). The PVWCD/VBSD ratio was approximately 16% from T6 to T12 and significantly less at 3% from L1 to L5 (P < 0.05). The rate of bone cement leakage into the spinal canal through the Batson vein was 10.1% in the thoracic group and 3.7% in the lumbar group during PKP. In the thoracic group, the BCSD was 3.1 ± 0.5 mm, the BCA was 30.2 ± 3.8 mm2, and the BCA/SCA ratio was 17.2 ± 2.0%. In the lumbar group, the BCSD was 1.4 ± 0.3 mm, the BCA was 14.8 ± 2.2 mm2, and the BCA/SCA ratio was 7.4 ± 1.0%. The BCSD, BCA and BCA/SCA ratio were significantly higher in the thoracic group than in the lumbar group (P < 0.05). Conclusions The PVWCD in the middle and lower thoracic vertebrae can help reduce bone cement leakage into the spinal canal by enabling avoiding bone cement distribution over the posterior 1/6 of the vertebral body during PKP. The effect of the difference between the thoracic and lumbar posterior vertebral wall morphology on bone cement leakage into the spinal canal through the Batson vein in OVCF patients during PKP is one reason that the rate of bone cement leakage into the thoracic spinal canal is significantly higher than that into the lumbar spinal canal.

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