Pablo Wagner, Emilio Wagner, Miguel Pinochet, David Salinas, Peter Lam
{"title":"外翻锯骨模型经皮颈横跖骨囊外截骨术不同固定方法的生物力学评价。","authors":"Pablo Wagner, Emilio Wagner, Miguel Pinochet, David Salinas, Peter Lam","doi":"10.1177/24730114241303768","DOIUrl":null,"url":null,"abstract":"<p><strong>Background: </strong>There is limited literature available that provide information about fixation methods for minimally invasive hallux valgus osteotomies. Our objective was to evaluate the strength of different fixation methods for a percutaneous extracapsular transverse cervical metatarsal (PTCM) osteotomy in a sawbone model.</p><p><strong>Methods: </strong>Thirty solid foam sawbone foot models were used. Percutaneous extracapsular transverse cervical metatarsal osteotomies were performed and fixed in a standardized fashion in 6 different groups: (1) one 4.0-mm screw; (2) 2 (one 4.0-mm and one 3.0-mm) parallel screws; (3) 2 (one 4.0-mm and one 3.0-mm) divergent screws; (4) same as group 3, but with lateral metatarsal head cortex purchase with the 4.0-mm screw; (5) same as group 4, but with two 4.0-mm screws; (6) same as group 5, but with two 3.5-mm screws. Cyclic and load to failure testing were performed applying a plantar load to the metatarsal head. The measured variables were stiffness and force needed to create deformity using a Zwick Roell Universal Testing Machine.</p><p><strong>Results: </strong>Group 1 failed as a result of rotational instability in cyclic testing. In load to failure testing, group 3 did not achieve difference compared with group 2 (<i>P</i> = .09) (181 vs 131 N). Group 4 was stronger (<i>P</i> = .02) (250 N) than groups 1-3. Group 5 did not show differences relative to group 4 (<i>P</i> = .1) (223 N). Group 6 was stronger only than groups 1 and 2 (<i>P</i> = .01) (193 N).</p><p><strong>Conclusion: </strong>In this sawbones-based study, we found that the use of two 4.0-mm screws or use of a 3.0-mm screw and a 4.0-mm screw with lateral first metatarsal head cortical purchase was superior to other screw configurations.</p>","PeriodicalId":12429,"journal":{"name":"Foot & Ankle Orthopaedics","volume":"9 4","pages":"24730114241303768"},"PeriodicalIF":0.0000,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11645780/pdf/","citationCount":"0","resultStr":"{\"title\":\"Biomechanical Evaluation of Different Fixation Methods for Percutaneous Extracapsular Transverse Cervical Metatarsal Osteotomy in a Hallux Valgus Sawbone Model.\",\"authors\":\"Pablo Wagner, Emilio Wagner, Miguel Pinochet, David Salinas, Peter Lam\",\"doi\":\"10.1177/24730114241303768\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><strong>Background: </strong>There is limited literature available that provide information about fixation methods for minimally invasive hallux valgus osteotomies. Our objective was to evaluate the strength of different fixation methods for a percutaneous extracapsular transverse cervical metatarsal (PTCM) osteotomy in a sawbone model.</p><p><strong>Methods: </strong>Thirty solid foam sawbone foot models were used. Percutaneous extracapsular transverse cervical metatarsal osteotomies were performed and fixed in a standardized fashion in 6 different groups: (1) one 4.0-mm screw; (2) 2 (one 4.0-mm and one 3.0-mm) parallel screws; (3) 2 (one 4.0-mm and one 3.0-mm) divergent screws; (4) same as group 3, but with lateral metatarsal head cortex purchase with the 4.0-mm screw; (5) same as group 4, but with two 4.0-mm screws; (6) same as group 5, but with two 3.5-mm screws. Cyclic and load to failure testing were performed applying a plantar load to the metatarsal head. The measured variables were stiffness and force needed to create deformity using a Zwick Roell Universal Testing Machine.</p><p><strong>Results: </strong>Group 1 failed as a result of rotational instability in cyclic testing. In load to failure testing, group 3 did not achieve difference compared with group 2 (<i>P</i> = .09) (181 vs 131 N). Group 4 was stronger (<i>P</i> = .02) (250 N) than groups 1-3. Group 5 did not show differences relative to group 4 (<i>P</i> = .1) (223 N). Group 6 was stronger only than groups 1 and 2 (<i>P</i> = .01) (193 N).</p><p><strong>Conclusion: </strong>In this sawbones-based study, we found that the use of two 4.0-mm screws or use of a 3.0-mm screw and a 4.0-mm screw with lateral first metatarsal head cortical purchase was superior to other screw configurations.</p>\",\"PeriodicalId\":12429,\"journal\":{\"name\":\"Foot & Ankle Orthopaedics\",\"volume\":\"9 4\",\"pages\":\"24730114241303768\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2024-12-13\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11645780/pdf/\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Foot & Ankle Orthopaedics\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1177/24730114241303768\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"2024/10/1 0:00:00\",\"PubModel\":\"eCollection\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Foot & Ankle Orthopaedics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1177/24730114241303768","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2024/10/1 0:00:00","PubModel":"eCollection","JCR":"","JCRName":"","Score":null,"Total":0}
Biomechanical Evaluation of Different Fixation Methods for Percutaneous Extracapsular Transverse Cervical Metatarsal Osteotomy in a Hallux Valgus Sawbone Model.
Background: There is limited literature available that provide information about fixation methods for minimally invasive hallux valgus osteotomies. Our objective was to evaluate the strength of different fixation methods for a percutaneous extracapsular transverse cervical metatarsal (PTCM) osteotomy in a sawbone model.
Methods: Thirty solid foam sawbone foot models were used. Percutaneous extracapsular transverse cervical metatarsal osteotomies were performed and fixed in a standardized fashion in 6 different groups: (1) one 4.0-mm screw; (2) 2 (one 4.0-mm and one 3.0-mm) parallel screws; (3) 2 (one 4.0-mm and one 3.0-mm) divergent screws; (4) same as group 3, but with lateral metatarsal head cortex purchase with the 4.0-mm screw; (5) same as group 4, but with two 4.0-mm screws; (6) same as group 5, but with two 3.5-mm screws. Cyclic and load to failure testing were performed applying a plantar load to the metatarsal head. The measured variables were stiffness and force needed to create deformity using a Zwick Roell Universal Testing Machine.
Results: Group 1 failed as a result of rotational instability in cyclic testing. In load to failure testing, group 3 did not achieve difference compared with group 2 (P = .09) (181 vs 131 N). Group 4 was stronger (P = .02) (250 N) than groups 1-3. Group 5 did not show differences relative to group 4 (P = .1) (223 N). Group 6 was stronger only than groups 1 and 2 (P = .01) (193 N).
Conclusion: In this sawbones-based study, we found that the use of two 4.0-mm screws or use of a 3.0-mm screw and a 4.0-mm screw with lateral first metatarsal head cortical purchase was superior to other screw configurations.