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Patients aged 18–50 with noncontact ACL tears (2020–2021) were compared with a matched cohort with meniscal tears, excluding those without preoperative MRI. After measuring TT-TG on axial MRI images, 159 ACL-injured and 140 ACL-intact patients showed no significant TT-TG difference (P=.246). Results do not support TT-TG distance as an ACL deficiency association.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":40,"@type":76,"position":81},"https://docshare.wps.com/document/research-report/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/no-difference-in-tibial-tubercle-trochlear-groove-distance-between-patients-with-and-without-a-history-of-anterior-cruciate-ligament-tears/448018/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/no-difference-in-tibial-tubercle-trochlear-groove-distance-between-patients-with-and-without-a-history-of-anterior-cruciate-ligament-tears/448018.png","ImageObject",300,407,{"name":92,"@type":93},"Eliana","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-06","2026-09-29",true,{"@type":102,"interactionType":103,"userInteractionCount":81},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What was the study trying to determine about TT-TG distance and ACL injury?","Question",{"text":112,"@type":113},"The study tested whether TT-TG distance is significantly increased in patients with ACL injury compared with patients without ACL injury history.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"How were participants selected and what comparisons were made?",{"text":117,"@type":113},"Patients aged 18 to 50 with noncontact ACL tears between 2020 and 2021 were compared with a similar cohort with meniscal tears, matched for age and sex, from 2020 to 2021. Preoperative MRI availability was required.",{"name":119,"@type":110,"acceptedAnswer":120},"What did the results show about TT-TG distance between the two groups?",{"text":121,"@type":113},"TT-TG distance was not significantly different between groups (mean 11.3 ± 4.10 mm vs 11.9 ± 4.62 mm; P = .246), and the findings did not support an association with ACL deficiency.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},448018,1790811803,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":39,"category_name":40,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":81,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":24,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":143,"read_time":144},4398048949847,"https://ap-avatar.wpscdn.com/avatar/400002536579ef2da7f?_k=1778318612642679267","Original Research  \nNo Difference in Tibial Tubercle Trochlear Groove Distance Between Patients With and Without a History of Anterior Cruciate Ligament Tears  \nNathaniel M. Tchangou,* y BS, Rahul R. Muchintala,* MD, Adeeb J. Hanna,* MD,  \nRyan W. Paul,* BS, Ari J. Clements,* MD, John Dinger,* BS, John Czarnecki,* BS, Ralph Cook,* MD, Neel K. Patel,* MD, Michael G. Ciccotti,* MD, Steven B. Cohen,* MD, Meghan E. Bishop,* MD, and Brandon J. Erickson, z MD  \nInvestigation performed at Rothman Orthopaedic Institute, Philadelphia, Pennsylvania, USA  \n\n| Background: The tibial tubercle–trochlear groove (TT-TG) distance is a known risk factor for patellar instability, but its role in anterior cruciate ligament (ACL) deficiency is unclear. Previous studies found an increased TT-TG distance in patients with noncontact ACL tears compared with patients with intact ACLs.\u003Cbr>Hypothesis: The authors hypothesize that there will be a significantly increased TT-TG distance in patients with ACL injury compared with patients without ACL injury.\u003Cbr>Study Design: Cross-sectional study; Level of evidence, 3 .\u003Cbr>Methods: All patients aged 18 to 50 years who had noncontact ACL tears between 2020 and 2021 were included in this study. Patients with ACL tears were compared with a similar cohort of patients with meniscal tears, matched for age and sex, between 2020 and 2021 . Patients were excluded if preoperative magnetic resonance imaging (MRI) was unavailable. One author reviewed axial images to measure TT-TG distance. An independent 1-tailed t test was used to assess for a difference in TT-TG distance between patients with and without ACL injury.\u003Cbr>Results: The TT-TG distance was measured for 299 patients, of whom 159 had an ACL injury and 140 patients had intact ACLs. Patients with an ACL injury had a mean TT-TG distance of 11.3 6 4.10 mm, and patients without ACL injury had a mean TT-TG distance of 11.9 6 4.62 mm. There was no significant difference in TT-TG distance between the 2 groups (P = .246) . The sample of patients in both groups had no significant differences in age, sex, or laterality of injury.\u003Cbr>Conclusion: No statistically significant difference in TT-TG distance was found between patients with and without ACL injury. The findings of this study do not support an association between TT-TG distance and ACL deficiency. Instead, TT-TG distance may vary as a result of ACL injury due to increased laxity in tibial external rotation.\u003Cbr>Keywords: TT-TG distance; ACL reconstruction; knee; risk factor |  |\n| --- | --- |\n| Anterior cruciate ligament (ACL) tears are one of the most common injuries seen by orthopaedic surgeons, especially | factors for ACL injury and strategies to improve outcomes after ACL reconstruction surgery. 1,2 Previously identified |\n| in young, active patients who take part in recreational | risk factors for ACL injury include female sex, younger |\n| and competitive sports.8 The ACL has an integral role in | age, hyperlaxity, participation in soccer, history of contra- |\n| providing rotational stability and preventing excessive | lateral ACL injury, and knee valgus.7,8,12,14 However, more |\n| anterior translation of the tibia in any activity.15 Given | risk factors are being investigated to better understand |\n| its prevalence, research has focused on determining risk | modifiable risk factors for ACL injury or graft failure after reconstruction surgery. More research analyzing risk factors and concomitant procedures performed during ACL |\n| The Orthopaedic Journal of Sports Medicine, 14(1), 23259671251403157 | reconstruction or revision will ultimately help prevent |\n| DOI: 10.1177/23259671251403157\u003Cbr>􀀂 The Author(s) 2026 | graft failure and provide better care. |\n\nThis open-access article is published and distributed under the Creative Commons Attribution - NonCommercial - No Derivatives License ([https://creativecommons.org/](https://creativecommons.org/)[ ](https://creativecommons.org/)[licenses/by-nc-nd/4.0/](lice","cbCaibSAnYOolmlx","https://ap.wps.com/l/cbCaibSAnYOolmlx","pdf",277555,"English","# Background\n# Hypothesis\n# Study Design and Methods\n## Participants and Exclusions\n## Measurements and Statistics\n# Results\n# Conclusion","[{\"question\":\"What was the study trying to determine about TT-TG distance and ACL injury?\",\"answer\":\"The study tested whether TT-TG distance is significantly increased in patients with ACL injury compared with patients without ACL injury history.\"},{\"question\":\"How were participants selected and what comparisons were made?\",\"answer\":\"Patients aged 18 to 50 with noncontact ACL tears between 2020 and 2021 were compared with a similar cohort with meniscal tears, matched for age and sex, from 2020 to 2021. Preoperative MRI availability was required.\"},{\"question\":\"What did the results show about TT-TG distance between the two groups?\",\"answer\":\"TT-TG distance was not significantly different between groups (mean 11.3 ± 4.10 mm vs 11.9 ± 4.62 mm; P = .246), and the findings did not support an association with ACL deficiency.\"}]","No Difference in Tibial Tubercle Trochlear Groove Distance Between Patients With and Without a History of Anterior Cruciate Ligament Tears | PDF",1790724738,13]