Acta orthopaedica et traumatologica turcica最新文献

{"title":"Personalizing adult spinal deformity surgery through multimodal artificial intelligence.","authors":"Tej D Azad, Vikas N Vattipally, Christopher P Ames","doi":"10.5152/10.5152/j.aott.2024.23215","DOIUrl":"10.5152/10.5152/j.aott.2024.23215","url":null,"abstract":"<p><p>To achieve meaningful, patient-centered outcomes following adult spinal deformity (ASD) surgery, it is crucial to engage in precise preoperative planning, perform excellent intraoperative execution, and ensure careful postoperative management. The field of multimodal artificial intelligence (AI) is rapidly developing and should be integrated into the management of ASD patients. In this context, we outline the current concepts and explore future applications of AI across the ASD care continuum. Cite this article as: Azad TD, Vattipally VN, Ames CP. Personalizing adult spinal deformity surgery through multimodal artificial intelligence. Acta Orthop Traumatol Turc., 2024;58(2):80-82.</p>","PeriodicalId":93854,"journal":{"name":"Acta orthopaedica et traumatologica turcica","volume":"58 2","pages":"80-82"},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11181199/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141918301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Transcatheter Arterial Chemoembolization Combined with Hepatic Arterial Infusion Chemotherapy Versus Transcatheter Arterial Chemoembolization for Unresectable Hepatocellular Carcinoma: A Systematic Review and Meta-analysis.","authors":"Guoying Feng, Yi Feng, Shu Yao, Xun Huang, Zuxiang Peng, Yongliang Tang, Wen Tang, Zhengyan Li, Hanchen Wang, Hongming Liu","doi":"10.5152/tjg.2024.23228","DOIUrl":"10.5152/tjg.2024.23228","url":null,"abstract":"<p><p>In this study, we evaluated the efficacy and safety of transcatheter arterial chemoembolization (TACE) combined with hepatic arterial infusion chemotherapy (HAIC) compared to TACE monotherapy for the treatment of unresectable hepatocellular carcinoma (HCC). Relevant studies were systematically searched in PubMed, Embase, Web of Science, and Cochrane Library databases until September 1, 2023. Our analysis included 7 cohort studies encompassing a total of 630 patients. The results demonstrated that the TACE plus HAIC group exhibited significantly improved prognosis compared to the TACE alone group, as evidenced by superior rates of complete response, partial response, progressive disease, objective response rate, and disease control rate. Moreover, the TACE group displayed a lower risk of platelet reduction and vomiting when compared to the TACE plus HAIC group. None of the 7 studies reported any intervention-related mortality. In conclusion, the combination of TACE and HAIC may be recommended as a viable option for patients with unresectable HCC, given its evident enhancements in survival and tumor response rates without significant differences in adverse events when compared to TACE monotherapy. Nevertheless, additional randomized controlled trials and studies involving Western cohorts are warranted to further validate these findings.</p>","PeriodicalId":93854,"journal":{"name":"Acta orthopaedica et traumatologica turcica","volume":"35 4","pages":"266-279"},"PeriodicalIF":0.0,"publicationDate":"2024-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142037977","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ultrasonography-guided percutaneous release of A3 pulley of the fifth finger to treat trigger finger: Description of the technique, with reference to a specific case.","authors":"María Montes-Comino, Luis Eduardo De la Torre-López, Silvia Guillén-Climent, Fernando Jesús Mayordomo-Riera","doi":"10.5152/j.aott.2024.23086","DOIUrl":"10.5152/j.aott.2024.23086","url":null,"abstract":"<p><p>Trigger finger causes pain and a persistent functional limitation of the hand, which can lead to permanent blockage of the flexor tendon. Ultrasonography-guided percutaneous release has been widely reported as a successful technique for trigger finger involving the A1 pulley. This article describes for the first time the use of this technique in an unusual location, the A3 pulley of the fifth finger. A 71-year-old patient presented with a 3-month history of pain and blockage in the fifth finger of the right hand and was diagnosed with a grade III trigger finger, according to the Froimson scale. We performed an ultrasonography-guided percutaneous release technique on the A3 pulley to release the flexor tendon of the fifth finger. Ultrasonography-guided percutaneous polectomy to treat trigger finger in the A1 pulley is an effective alternative treatment to surgery and even has certain advantages over it. The anatomical similarity between the A1 and A3 pulleys was the key factor that supported the use of this technique in this clinical case. Based on past experience in similar cases, we conclude that ultrasonography-guided percutaneous polectomy of the A3 pulley of the fifth finger was a surgical technique which could lead to a satisfactory outcome in the treatment of this condition.</p>","PeriodicalId":93854,"journal":{"name":"Acta orthopaedica et traumatologica turcica","volume":"58 1","pages":"77-79"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11058728/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140208433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Minimial clinically important difference values in distal metaphyseal ulnar shortening for ulnar impaction syndrome and assessment of the relationship between level of the osteotomy and bone union time.","authors":"Mustafa Özcan, Emre Acar, Onur Başçı, Mustafa Hulusi Özkan","doi":"10.5152/j.aott.2024.23111","DOIUrl":"10.5152/j.aott.2024.23111","url":null,"abstract":"<p><strong>Objective: </strong>We aimed to define minimal clinically important difference (MCID) values of patient-reported outcome measures (PROMs) for distal metaphyseal ulnar shortening and to assess the relationship between level of the osteotomy and time to bone union.</p><p><strong>Methods: </strong>20 patients who had distal metaphyseal ulnar shortening osteotomies due to ulnar impaction syndrome and had at least 6 months of follow-ups were included in this study. The mean follow-up period was 12.3 ± 7.01 months. The PROMs which consisted of patient-rated wrist evaluation (PRWE) and quick disabilities of arm, shoulder, and hand (QDASH) were recorded on the day before the surgery and at follow-up assessments. Grip strength and range of motion were recorded for operated and contralateral wrists at postoperative assessments. Postoperative radiological evaluations of distance of the osteotomy from the distal ulnar articular surface (osteotomy level), the union of osteotomy site; preoperative and postoperative evaluations of styloid-triquetral distance, and ulnar variance were performed using AP wrist x-rays. The MCID values for PRWE and QDASH were calculated using ROC curve analysis.</p><p><strong>Results: </strong>Mean PRWE and QDASH scores decreased statistically significantly. The mean grip strength of contralateral wrists was higher. Mean ulnar variance decreased, whereas styloid-triquetral distance increased postoperatively. Patients with osteotomy levels of greater than 13.7 mm had a longer time from surgery to bone union. Furthermore, patients with time from surgery to bone union shorter than 7 weeks had an osteotomy closer to the ulnar articular surface. The MCID values for PRWE and QDASH were analyzed and calculated through the ROC curve as 22.25 and 20.45, respectively.</p><p><strong>Conclusion: </strong>This study has shown us that the osteotomy level affects the time to bone union and an osteotomy closer than 13.7 mm to the ulnar articular surface seems to result in shorter union time. Furthermore, MCID values were defined for PRWE and QDASH as 22.25 and 20.45, respectively.</p><p><strong>Level of evidence: </strong>Level IV, Therapeutic Study.</p>","PeriodicalId":93854,"journal":{"name":"Acta orthopaedica et traumatologica turcica","volume":"58 1","pages":"27-33"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11059569/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140208475","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Distal femur morphology and the suitability of standard guides for knee arthroplasty in the Turkish population.","authors":"Mustafa Alper İncesoy, Nurdan Güngören, Orkhan Aliyev, Nurzat Elmalı, İbrahim Tuncay, Fatih Yıldız","doi":"10.5152/j.aott.2024.21066","DOIUrl":"10.5152/j.aott.2024.21066","url":null,"abstract":"<p><strong>Objective: </strong>The aim of this study was to evaluate the posterior condylar angle (PCA) and condylar twist angle (CTA) of the distal femur in the Turkish population and its concordance with the current standard prosthesis guides used in total knee arthroplasty (TKA).</p><p><strong>Methods: </strong>Two hundred and forty knees of 120 Turkish subjects (60 male and 60 female) were included in this study. PCA, CTA, femoral mediolateral lengths (fML), medial femoral anteroposterior lengths (fMAP), lateral femoral anteroposterior lengths (fLAP), distances between the trochlear groove and fMAP (DBTG-fMAP), distances between the trochlear groove and fLAP (DBTG-fLAP), medial posterior condylar cartilage thickness (MPCCT) and lateral posterior condylar cartilage thicknesses (LPCCT) were measured on magnetic resonance imaging (MRI).</p><p><strong>Results: </strong>The median CTA was 7° (range: 0°-13.0°) and the median PCA was 4° (range 0°-11.0°) (P < .0001). The median fML was 79.5 mm (range: 65.7-98.9). The median length of the fMAP was 58.2 mm (range: 46.8-69.0) and the median length of fLAP was 58.2 mm (range: 48.4-73.0). The DBTG-fMAP was 15.2 mm (range: 5.2-23.2), and DBTG-fLAP length was 21.9mm (range: 16.4-29.4). The median MPCCT and LPCCT were 2.4 mm (range: 1.6-3.6) and 2.3 mm (range: 1.2-2.8), respectively. The intraclass correlation coefficient for quantifying interobserver and intraobserver reliability showed excellent agreement regarding the PCA and CTA.</p><p><strong>Conclusion: </strong>This study has shown us that PCA and CTA may be higher in the Turkish population. Although it is not known whether these results have any clinical utility, it may be useful for surgeons to keep this in mind to prevent femoral component malposition.</p><p><strong>Level of evidence: </strong>Level IV, Diagnostic Study.</p>","PeriodicalId":93854,"journal":{"name":"Acta orthopaedica et traumatologica turcica","volume":"58 1","pages":"39-44"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11058999/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140208472","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Prognostic factors and real-life applicability of prognostic models for patients with bone metastases of carcinoma.","authors":"Kaan Ali Dalkir, Akif Mirioglu, Bugra Kundakci, Melih Bagir, Mehmet Ali Deveci, Hilmi Serdar Ozberlas","doi":"10.5152/j.aott.2024.23132","DOIUrl":"10.5152/j.aott.2024.23132","url":null,"abstract":"<p><strong>Objective: </strong>This study aimed to investigate the factors affecting the survival of patients with bone carcinoma metastases and assess the clinical applicability of existing prognostic models.</p><p><strong>Methods: </strong>We retrospectively evaluated 247 patients who presented to our hospital between 2011 and 2021 diagnosed with bone carcinoma metastasis. Demographic data, general health status, primary diagnoses, laboratory and radiological findings, pathological fracture status, treatment methods, and survival times of the patients were recorded, and the effects of these variables on survival time were evaluated. Previously developed Katagiri, Janssen, 2013-Spring, PathFX, and SORG prognostic models were applied, and the predictive performances of these models were evaluated by comparing the predicted survival time with the actual survival time of our patients.</p><p><strong>Results: </strong>After the multivariate analysis, the following factors were shown to be significantly associated with the survival time of patients: blood hemoglobin and leukocyte levels, lactate dehydrogenase concentration, prognostic nutritional index, body mass index, performance status, medium and fast-growing groups of primary tumors, presence of extraspinal and visceral or brain metastases, and pathological fractures. According to receiver operating characteristics and Brier scores, SORG had the overall highest performance scores, while the Janssen nomogram had the lowest.</p><p><strong>Conclusion: </strong>Our report showed that all prognostic models were clinically applicable, but their performances varied. Among them, the SORG predictive model had the best performance scores overall and is the model the authors suggested for survival prediction among patients with carcinoma bone metastases.</p><p><strong>Level of evidence: </strong>Level IV, Prognostic Study.</p>","PeriodicalId":93854,"journal":{"name":"Acta orthopaedica et traumatologica turcica","volume":"58 1","pages":"62-67"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11059969/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140208476","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigation into a new denervation model of the sciatic nerve zones in rats: Selective motor or sensorial denervation.","authors":"Selman Hakkı Altuntaş, Levent Sarikcioglu, Hasan Rifat Koyuncuoğlu, İbrahim Metin Çiriş, Fuat Uslusoy, Osman Gurdal, Mustafa Asım Aydın","doi":"10.5152/j.aott.2024.22125","DOIUrl":"10.5152/j.aott.2024.22125","url":null,"abstract":"<p><strong>Objective: </strong>This study aimed to introduce a reliable and useful model of selective sensorial or motor denervations of the sciatic nerve in rats with clinical and laboratory outcomes.</p><p><strong>Methods: </strong>The surgical technique was determined via detailed cadaveric dissections of rat sciatic nerve roots and cross-sectional histoanatomy. Forty animals were divided into the sham, sensorial denervation (SD), motor denervation (MD), and combined denervation (CD) groups and evaluated clinically via the pinch test and observation. Electrophysiological tests, retrograde neuronal labeling, and histologic and radiographic studies were performed. The weights of the muscles innervated by the sciatic nerve were measured.</p><p><strong>Results: </strong>The nerve root topography at the L4 level was consistent. Hemilaminectomy satisfactorily exposed all the roots contributing to the sciatic nerve and selectively denervated its sensorial and motor zones. Sensorial denervation caused foot deformities and wound problems, which were more severe in SD than in MD and CD. Nerve histomorphometry, electrophysiological tests, retrograde neuronal labeling studies, and measurements of the muscle weights also verified the denervations.</p><p><strong>Conclusion: </strong>This study has shown the feasibility of selective (sensory or motor) sciatic nerve denervation through a single-level hemilaminectomy. The surgical technique is reliable and has a confounding effect on gait. Sensorial denervation had more severe foot problems than motor and combined denervation in rats.</p>","PeriodicalId":93854,"journal":{"name":"Acta orthopaedica et traumatologica turcica","volume":"58 1","pages":"10-19"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11058566/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140208474","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Reconstruction of multiple long digital and hand defects using the multilobed anterolateral thigh perforator flap.","authors":"Haiping Di, Thomas Yu Xia, Chao Ma, Haina Guo, Peipeng Xing, Chengde Xia","doi":"10.5152/j.aott.2024.23125","DOIUrl":"10.5152/j.aott.2024.23125","url":null,"abstract":"<p><strong>Objective: </strong>This study investigated the reconstruction of multiple long digital and hand defects using the multilobed anterolateral thigh perforator flap.</p><p><strong>Methods: </strong>From January 2018 to January 2021, 14 patients (hands) with multiple long digital defects were treated using the multilobed anterolateral thigh perforator flap. The mean age of the patients was 35 years (range, 18-55 years). The mean size (length × width) of the defects was 12.3 × 10.6 cm (range, 9 × 7 cm-16 × 12 cm). The mean size of the flap was 13.7 × 12.1 cm (range, 11 × 8 cm-19 × 14 cm). The total active motion was compared to the opposite side (100% normal, excellent; 75%-99% normal, good; 50%-74% normal, fair; <50% normal, poor).</p><p><strong>Results: </strong>In this series, 12 flaps survived completely. Partial flap necrosis occurred in 2 patients but healed with wound care. The mean follow-up period was 28 months (range, 25-34 months). Based on the total active motion scoring system, we got 1 excellent, 7 good, 7 fair, and 1 poor result. A second surgery to separate the digits was not required.</p><p><strong>Conclusion: </strong>Multiple digital and hand defects can be reconstructed simultaneously using the multilobed anterolateral thigh perforator flap, allowing a length-to-width ratio of greater than 1.5:1 to resurface long digital defects.</p><p><strong>Level of evidence: </strong>Level IV, Therapeutic Study.</p>","PeriodicalId":93854,"journal":{"name":"Acta orthopaedica et traumatologica turcica","volume":"58 1","pages":"34-38"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11059943/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140208477","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The effect of the size of pedicle screw on the long-term radiological and clinical results of short-segment posterior instrumentation in the management of thoracolumbar vertebral fractures.","authors":"Anıl Murat Öztürk, Onur Süer, Selahaddin Aydemir, Bünyamin Kılıçlı, Ömer Akçalı","doi":"10.5152/j.aott.2024.23056","DOIUrl":"10.5152/j.aott.2024.23056","url":null,"abstract":"<p><strong>Objective: </strong>It was aimed at evaluating the effect of the size of the pedicle screw placed on the fractured vertebra on the long-term radiological and clinical results of short-segment posterior instrumentation applied in the surgical treatment of thoracolumbar vertebral fractures.</p><p><strong>Methods: </strong>This retrospective study included 36 patients who underwent short-segment posterior instrumentation surgery for a single-level thoracolumbar (T11-L2) fracture between January 2015 and March 2021. The patients included in the study were divided into 2 groups according to the size of the pedicle screw placed in the fractured vertebra (group A: intermediate screw 4.5 mm, ≤35 mm+less than 50% of the vertebral corpus length, m/f: 13/4, n: 17, age: 36.5; group B: intermediate screw 5.5 mm, ≥40 mm+more than 70% of the vertebral corpus length, m/f: 11/8, n: 19, age: 42.6). All patients were periodically evaluated clinically and radiologically. Vertebral compression angle (VCA), anterior and posterior vertebral body height (ABH-PBH), intraoperative parameters (instrumentation time and intraoperative fluoroscopy number), and complications were compared between the 2 groups.</p><p><strong>Results: </strong>Both groups were comparable with respect to age, sex, level of injury, AO classification, mechanism of injury, and American Spinal Cord Injury Association impairment scale. Restoration of VCA and vertebral corpus heights was achieved sufficiently in both groups after operation (P < .0001). There was no significant difference between the 2 groups in terms of early postoperative VCA, VCA measured at final follow-up, or loss of correction in VCA. At the last follow-up, PBH was statistically significantly better preserved in group B (P=.0424). There was no difference between the 2 groups in terms of operation time and the number of intraoperative fluoroscopies. Implant failure was observed in 1 patient in group A.</p><p><strong>Conclusion: </strong>This study has revealed that using a long, thick pedicle screw placed in the fractured vertebra can better preserve the PBH at the final follow-up. No correlation was found between the size of the intermediate screw and the preservation of the correction in the postoperative vertebral heights and VCA during the follow-up.</p><p><strong>Level of evidence: </strong>Level III, Therapeutic Study.</p>","PeriodicalId":93854,"journal":{"name":"Acta orthopaedica et traumatologica turcica","volume":"58 1","pages":"20-26"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11059949/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140208432","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Intraoperative lateral wall breach simulation in the cadaveric spine and the impact of thread designs of screws on pullout strength in the osteoporotic thoracic vertebrae: A biomechanical study in human cadavers.","authors":"Ozcan Kaya, Okan Ozkunt, Mustafa Sungur, Mehmet Semih Cakir, Murat Baydogan, Kerim Sariyilmaz","doi":"10.5152/j.aott.2024.22067","DOIUrl":"10.5152/j.aott.2024.22067","url":null,"abstract":"<p><strong>Objective: </strong>This study aimed (1) to simulate pedicle screw pullout after intraoperative external wall perforation and (2) to assess restoration strength with different thread designs in the pedicle screw instrumentation for osteoporotic thoracic vertebrae.</p><p><strong>Methods: </strong>Twenty fresh-frozen human cadaveric thoracic vertebra bodies were prepared and divided into 4 groups: group 1, 5.5 mm × 45 mm polyaxial single thread pedicle screws (PASTS); group 2, after wall injury 5.5 mm × 45 mm PASTS; group 3, 6.5 mm × 45 mm PASTS after wall injury; and group 4: 6.5 mm × 45 mm polyaxial mixed-threaded screws after wall injury. While group 1 was the control group, groups 2, 3, and 4 were used as study groups after the lateral wall breach. All prepared screw units were placed on a universal pullout measurement testing device.</p><p><strong>Results: </strong>The mean bone mineral density for 20 thoracic vertebrae was 0.57 ± 0.12 g/cm2 (range 0.53-0.6 g/cm2 ). The mean pullout strength was 474.90 Newtons (N) for group 1, 412.85 N for group 2, 475.4 N for group 3, and 630.74N for group 4. The lateral wall breach caused a 14.1 % decrease in average pullout strength compared with the initial screw pullout. Mixed (double)-threaded screws increased pullout strength compared to 6.5 mm screws (P=.036) Conclusion: Using a 1 mm thicker polyaxial pedicle screw or mixed (double)-threaded pedicle screw seems to increase pullout strength; however, this was statistically significant only for group 4. In the thoracic spine, the redirection possibility of the pedicle screw is limited, and augmentation with cement will not be appropriate due to the risk of wall injury-related leakage. Therefore, care should be taken to avoid violating the lateral cortex by using appropriate pedicle entry points and trajectories.</p>","PeriodicalId":93854,"journal":{"name":"Acta orthopaedica et traumatologica turcica","volume":"58 1","pages":"57-61"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11059965/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140208473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}