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

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.

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

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.

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

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.

Comparison of high- and low-viscosity cement percutaneous vertebroplasty with manipulative reduction for the treatment of Kümmell’s disease: A retrospective cohort study

2021 ◽  
pp. 1-7
Author(s):  
Liang Zhang ◽  
Jingcheng Wang ◽  
Yongxiang Wang ◽  
Xinmin Feng
Keyword(s):  
Clinical Outcomes ◽  
Operative Time ◽  
Percutaneous Vertebroplasty ◽  
Cement Leakage ◽  
High Viscosity ◽  
Vertebral Height ◽  
Low Viscosity ◽  
Significant Difference ◽  
Kummell’S Disease ◽  
Kümmell’S Disease

OBJECTIVE: To compare the clinical outcomes and cement leakage rate between high-viscosity and low-viscosity cement percutaneous vertebroplasty (PVP) with manipulative reduction in the treatment of Kümmell’s disease (KD). METHOD: PVP using high-viscosity cement (Group H) or low-viscosity cement (Group L) with manipulative reduction was compared in 86 KD patients. Visual Analogue Scale (VAS), Oswestry Disability Index (ODI), vertebral height, kyphosis angle and complications were evaluated and compared preoperative, one day postoperative, and at final follow-up. RESULTS: The VAS score, ODI score, mean anterior and middle vertebral height variation significantly improved in both groups postoperatively. However, there was no significant difference between the two groups considering the above results preoperative and postoperative. Significantly less cement leakage (13.6%) and shorter operative time (35.6 ± 5.1 min) were observed in Group H when compared with Group L (45.2% and 41.1 ± 5.3 min) (p< 0.05). CONCLUSION: The clinical outcomes and radiologic findings of PVP with manipulative reduction was not influenced by cement viscosity. However, high cement viscosity PVP was found to be significant less cement leakage and shorter operative time.

scholarly journals Comparison between Balloon Kyphoplasty and Short Segmental Fixation Combined with Vertebroplasty in the Treatment of Kümmell’s Disease

2015 ◽  
Vol 18;4 (4;18) ◽  
pp. 373-381 ◽  
Author(s):  
Liang Chen
Keyword(s):  
Pain Score ◽  
Vertebral Body ◽  
Balloon Kyphoplasty ◽  
Vertebral Height ◽  
Kyphotic Angle ◽  
Kummell’S Disease ◽  
Segmental Fixation ◽  
The Mean ◽  
Kümmell’S Disease

Background: Kümmell’s disease is a clinical syndrome characterized by a minor spinal trauma with a symptom-free period from months to years, followed by progressive painful kyphosis. Kyphoplasty and vertebroplasty have been introduced to treat Kümmell’s disease, and obtained good clinical results. Recently, delayed cement displacement was reported for Kümmell’s disease treated by cement augmentation alone. Some authors recommended internal fixation combined with cement injection for this particular condition. Objective: To evaluate and compare the clinical efficacy, especially the pain reduction, of 2 procedures (kyphoplasty alone versus short segmental fixation combined with vertebroplasty) in the treatment of Kümmell’s disease. Study Design: Retrospective evaluation and comparison of postoperative VAS scores and radiographic outcomes. Setting: Single center inpatient population. Methods: Two procedures, including conventional balloon kyphoplasty and short segmental fixation combined with vertebroplasty, were utilized for 54 patients with Kümmell’s disease. All patients were followed-up for 8 – 42 months. Visual analog scale (VAS), vertebral height, and local kyphotic angle were evaluated and compared for 2 groups before surgery, after surgery, and at final follow-up. Pearson correlation coefficients were calculated to assess the relationship between the decreased values of pain scores (VAS) and improvement of anterior vertebral height and local kyphotic angle. Results: For the KP group, the VAS pain score decreased significantly from 7.8 ± 0.9 before surgery to 3.3 ± 1.0 after surgery (P < 0.01), and 2.9 ± 0.9 at final follow-up (P < 0.01). The mean height of the anterior vertebral body increased from 14.8 ± 2.4 mm before surgery to 19.3 ± 2.1 mm after surgery (P < 0.01). The mean local kyphotic angle decreased from 22.7 ± 6.9° before surgery to 14.5 ± 5.3° after surgery (P < 0.01). For SSF + VP group, the VAS pain score decreased significantly from 7.2 ± 1.6 before surgery to 4.7 ± 1.3 after surgery (P < 0.01), and 3.5 ± 1.2 at final follow-up (P < 0.01). The mean height of the anterior vertebral body increased from 13.6 ± 2.5mm before surgery to 17.3 ± 2.7 mm after surgery (P < 0.01). The mean local kyphotic angle decreased from 24.7 ± 9.2° before surgery to 15.5 ± 6.2° after surgery (P < 0.01). No significant loss of correction of vertebral height and kyphosis was observed at follow-up. Improvement of VAS score had no correlation with improvement of vertebral height or local kyphotic angle. Asymptomatic cement leakage occurred in both groups. Limitations: Retrospective study with a relatively small sample size. Conclusions: This study showed that both balloon kyphoplasty alone and short segmental fixation combined with vertebroplasty for Kümmell’s disease were safe and effective. Improvement of VAS score had no correlation with improvement of vertebral height or local kyphotic angle. Comparatively, balloon kyphoplasty resulted in same the clinical outcomes with less complications. Key words: Kümmell’s disease, kyphoplasty, vertebroplasty, short segmental fixation, pain

scholarly journals Percutaneous Kyphoplasty for Kummell Disease with Severe Spinal Canal Stenosis

2015 ◽  
Vol 6;18 (6;11) ◽  
pp. E1021-E1028
Author(s):  
Yan Yang
Keyword(s):  
Spinal Canal ◽  
Invasive Procedure ◽  
Cement Leakage ◽  
Spinal Canal Stenosis ◽  
Stage Iii ◽  
Canal Stenosis ◽  
Institutional Review ◽  
Kummell’S Disease ◽  
Kümmell’S Disease

Background: Percutaneous kyphoplasty (PKP) has been proven as an effective, minimally invasive procedure for the treatment of Kummell’s disease in the early stages. However, a risk of cement leakage and further neurological damage remains during and after PKP, especially in chronic osteoporotic stage III Kummell’s disease with severe spinal canal stenosis. Objective: To evaluate the feasibility and efficacy of PKP for the treatment of chronic osteoporotic stage III Kummell’s disease with severe spinal canal stenosis. Study Design: A retrospective evaluation of postoperative radiographs. Setting: Pain management clinic. Methods: A retrospective study was performed on 9 patients with 11 levels managed with PKP for chronic osteoporotic stage III Kummell’s disease with severe spinal canal stenosis. Clinical and radiological outcomes were assessed. Results: Substantial pain relief was attained in all the patients. Both visual analogue scale (VAS) and Oswestry Disability Index (ODI) scores improved significantly from pre- to post-operation (P < 0.05), and remained unchanged at every follow-up. No neurological deterioration was found. Postoperatively, the anterior and midline vertebral body heights were significantly corrected (P < 0.05), and were sustained at the final follow-up. Similar results were seen in the correction of kyphotic angle. Neither cement leakage into the spinal canal nor further dislodging of the posterior vertebral fragments occurred. Two cases experienced subsequent fractures with one having a second PKP and the other being treated conservatively. Limitations: Retrospective study of 9 cases with 11 levels due partly to the rarity of the disorder. Conclusions: PKP is an effective, minimally invasive procedure for the treatment of chronic osteoporotic stage III Kummell’s disease with severe spinal stenosis, leading to a significant relief of symptoms and improvement of functional status. Institutional Review: This study was approved by the Institutional Review Board. Key words: Kummell’s disease, kyphoplasty, spine, osteoporosis, cement leakage, polymethylmethacrylate, neurological deficits, burst fractures

scholarly journals Comparison of the clinical outcomes of percutaneous vertebroplasty vs. kyphoplasty for the treatment of osteoporotic Kümmell’s disease:a prospective cohort study

2020 ◽  
Author(s):  
Jian-Zhong Chang ◽  
Ming-Jian Bei ◽  
Dong-Ping Shu ◽  
Cheng-Jun Sun ◽  
Ji-Bin Chen ◽  
...  
Keyword(s):  
Blood Loss ◽  
Bone Cement ◽  
Percutaneous Vertebroplasty ◽  
Operation Time ◽  
Cement Leakage ◽  
Significant Difference ◽  
Kummell’S Disease ◽  
Adjacent Vertebra ◽  
Kümmell’S Disease ◽  
Time Point

Abstract Background Percutaneous vertebroplasty (PVP) and percutaneous kyphoplasty (PKP) are widely used in the treatment of Kümmell's disease. The purpose of this article is to investigate the clinical efficacy of PVP and PKP for Kümmell's disease. Methods The clinical data that 56 cases of OVCF treated with either PVP (28 cases) or PKP (28 cases) and met the selection criteria from December 2015 to December 2017 were prospectively analyzed. Gender, age, course of disease, injury segment, BMD, VAS, ODI, imaging measurement indexes before surgery between the two groups showed no significant difference (all P>0.05). The bone cement leakage rate, bone cement injection amount, operation time, VAS, ODI, the rate of vertebral compression, correction rate of kyphosis and refracture rate of adjacent vertebra in 2 years were compared between the two groups to calculate clinical efficacy. Results The two groups were followed up for 24-48 months. There was no significant difference in the follow-up time, amount of bone cement injected, incidence of bone cement leakage and refracture rate of adjacent vertebra between the two groups (all P > 0.05). The operation time, intraoperative blood loss and fluoroscopy times of the PVP group were significantly lower than those of the PKP group (all P = 0.000). VAS score and ODI of the two groups were significantly lower at 1 d, 1 year and 2 years after surgery than before surgery (all P <0.05), but there was not statistically significant difference between the two groups at each time point after surgery (all P> 0.05). The rate of vertebral compression and kyphosis correction in the two groups were significantly corrected (P <0.05, respectively) and decreased significantly with time (all P <0.05), But there was not significant difference between the two groups at any time point (all P> 0.05). Conclusion Both PVP and PKP can achieve similar effects in the treatment of Kümmell's disease. Because the cost, operation time, blood loss, radiation exposure and surgical procedure of PVP are less than those of PKP, PVP has more clinical priority value.

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

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.

scholarly journals Perioperative Hidden Blood Loss in Elderly Osteoporotic Vertebral Compression Fracture Patients With Percutaneous Vertebroplasty and Influencing Factors

2021 ◽  
Vol 12 ◽  
pp. 215145932199617
Author(s):  
Tongchuan Cai ◽  
Feng Wang ◽  
Liping Nan ◽  
Dong Chen ◽  
Shuguang Wang ◽  
...  
Keyword(s):  
Blood Loss ◽  
Elderly Patients ◽  
Linear Regression Analysis ◽  
Operation Time ◽  
Cement Leakage ◽  
Vertebral Height ◽  
Duration Of Symptoms ◽  
Kummell’S Disease ◽  
Surgical Bleeding ◽  
Kümmell’S Disease

Introduction: To analyze perioperative hidden blood loss (HBL) and its influencing factors in elderly patients with osteoporotic vertebral compression fracture (OVCF) treated with percutaneous vertebroplasty (PVP). Materials and Methods: From January 2016 to December 2018, 103 elderly patients with OVCF (age > 85 years) treated with PVP were selected. The patient’s height, weight, duration of symptoms, previous medical history and other basic information were recorded. The hemoglobin (Hb) and hematocrit (Hct) immediately after admission and the next day postoperative were recorded. The operation time, surgical bleeding, Kummell’s disease, vertebral height preoperative and postoperative, and bone cement leakage was recorded. The total blood loss (TBL) was calculated according to Gross’s formula, and HBL was calculated based on the TBL and surgical bleeding. The influential factors were analyzed by multivariate linear regression analysis and single factor correlation analysis. Results: The mean surgical bleeding was 11.83 ± 5.37 mL, and HBL was 306.19 ± 185.92 mL, with a statistically significant difference (P = 0.000). According to the multiple linear regression analysis, the duration of symptoms (P = 0.030), number of fracture segments (P = 0.016), operation time (P = 0.004), loss of vertebral height (P = 0.026), recovery of vertebral height (P = 0.004), Kummell’s disease (P = 0.040) and cement leakage (P = 0.004) were correlated with an increased amount of HBL. Sex (P = 0.077), body mass index (BMI) (P = 0.486), hypertension (P = 0.734), diabetes (P = 0.769), fracture level (P = 0.518) and surgical bleeding (P = 0.821) had no correlation with the amount of HBL. Conclusions: There was obvious HBL during the perioperative period of PVP in elderly patients with OVCF. A fresh fracture, multi-segment vertebral fracture, longer operation time, presence of Kummell’s disease, loss of vertebral height, recovery of vertebral height and cement leakage the increased perioperative HBL during PVP.

scholarly journals Percutaneous kyphoplasty for osteoporotic vertebral compression fractures via unilateral versus bilateral approach

2020 ◽  
Author(s):  
Wenye Yao ◽  
Bin Zhang ◽  
Qi Lai ◽  
Song Gao ◽  
Runsheng Guo
Keyword(s):  
Bone Cement ◽  
Operative Time ◽  
Cement Leakage ◽  
Leakage Rate ◽  
Vertebral Compression Fractures ◽  
Osteoporotic Vertebral Compression Fractures ◽  
Compression Fractures ◽  
Bilateral Approach ◽  
Unilateral Group

Abstract Objective To evaluate the efficacy of percutaneous kyphoplasty (PKP) for thoracolumbar osteoporotic vertebral compression fractures (OVCFs) via unilateral versus bilateral approach. Methods All patients who underwent PKP surgery for OVCFs in our hospital between June 2016 and December 2018 were included in this study. The pedicles were divided into two groups according to the manner of vertebral body puncture, which were as follows: unilateral pedicle puncture group (unilateral group, n=47) and bilateral pedicle puncture group (bilateral group, n=39).The operative time, amount of cement perfusion, correction angle of kyphosis, pain score before and after surgery, and leakage rate of bone cement were evaluated in all patients. The average follow-up was 19 months (range 13-34 months). Results The average age of patients who met the inclusion criteria, but not the exclusion criteria, was 76 years, and a total of 121 vertebral bodies were studied. There were 7 cases of postoperative bone cement leakage (unilateral group, 14.9%) and 6 cases of postoperative bone cement leakage (bilateral groups, 15.4%). There were differences in operative time and amount of cement perfusion between the two groups were statistically significant (P<0.05). There was no significant increase in age, body mass index, pain index during follow-up, treatment outcome, correction angle of kyphosis, and cement leakage rate between the two groups (P>0.05). Moreover, there was no significant difference in sex and bone cement leakage rate between the two groups by Pearson x 2 test (P>0.05). Conclusion Patients with OVCFs could obtain similar satisfactory clinical results via both unilateral and bilateral PKP approaches. However, the unilateral PKP approach is more advantageous as it has a shorter operative time, requires lesser cement volume, causes minimal trauma, is less costly, and results in lesser complications than the bilateral approach.

scholarly journals Clinical observation of two bone cement distribution modes of percutaneous vertebroplasty in the treatment of thoracolumbar Kümmell’s disease

2020 ◽  
Author(s):  
Ji-Bin Chen ◽  
Ya-Ping Xiao ◽  
Dong Chen ◽  
Jian-Zhong Chang ◽  
Te Li
Keyword(s):  
Bone Cement ◽  
Clinical Efficacy ◽  
Percutaneous Vertebroplasty ◽  
Operation Time ◽  
Vas Score ◽  
Significant Difference ◽  
Cement Distribution ◽  
Kummell’S Disease ◽  
Kümmell’S Disease

Abstract Background In recent years, percutaneous vertebroplasty (PVP) has provided a new option for the treatment of Kümmell’s disease (KD). The purpose of this study is to study the differences in clinical characteristics, clinical efficacy and related complications between two types of bone cement distribution patterns in the PVP treatment of KD. Methods Retrospective analysis from January 2016 to February 2018 showed that 63 patients with KD who received PVP treatment were included in the study. According to X-ray distribution modes of bone cement after treatment, all patients were divided into blocky group (30 cases ) and spongy group (33 cases). Clinical features and disease severity Preoperatively of the two groups, and clinical efficacy and related complications postoperatively were compared between the two groups. Results There was no significant difference in gender, injured segment, VAS and ODI preoperatively between the two groups (all P > 0.05). The duration of disease, age, Cobb angle and vertebral compression rate preoperatively were significantly higher in the blocky group than in the spongy group (P < 0.05, respectively). The height of vertebral anterior margin and BMD were significantly lower in the blocky group than in the spongy group (P < 0.05, respectively). The two groups were followed for at least 24 months. There were no statistically differences in the follow-up time, operation time, intraoperative blood loss, number of fluoroscopy, bone cement leakage and adjacent vertebral fracture between the two groups (all P > 0.05). The amount of bone cement injected into the blocky group was significantly higher than that of the spongy group (P = 0.000). VAS score and ODI postoperatively of the two groups were significantly reduced at 1 day, 1 year and the last follow-up (all P = 0.000), and were maintained at the last follow-up. VAS score and ODI postoperatively decreased significantly in the spongy group compared with the blocky group (P = 0.000). The correction degrees of kyphosis and vertebral compression postoperatively in the two groups were significantly corrected, but gradually decreased over time (P < 0.05), and these correction degrees of the blocky group was significantly higher than that of the spongy group and the postoperative loss was also more serious. Conclusions The treatment of KD by PVP can effectively relieve pain, improve function, restore vertebral height and correct kyphosis. The disease in the blocky group was more serious than that in the spongy group. The amount of bone cement, correction degrees of postoperative kyphosis and vertebral compression were significantly higher in the blocky group than in the spongy group, but the postoperative loss was also more serious in the blocky group. However, for pain relief and functional recovery, the spongy group was superior to the blocky group. Therefore, the spongy distribution pattern should be formed during the injection of bone cement to obtain better therapeutic effect.

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