{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,14]],"date-time":"2026-10-14T07:44:38Z","timestamp":1791963878456,"version":"4.3.4"},"reference-count":28,"publisher":"Wiley","license":[{"start":{"date-parts":[[2026,10,13]],"date-time":"2026-10-13T00:00:00Z","timestamp":1791849600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2026,10,13]],"date-time":"2026-10-13T00:00:00Z","timestamp":1791849600000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["arthroscopyjournals.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Arthroscopy"],"abstract":"\n Purpose<\/jats:title>\n To compare radiographically the concavity depth and slope angle of the congruent\u2010arc distal tibial allograft (CA\u2010DTA), harvested from the posterior distal tibia, with the traditional lateral distal tibial allograft (traditional DTA) used for glenoid reconstruction in anterior shoulder instability with bone loss.<\/jats:p>\n <\/jats:sec>\n \n Methods<\/jats:title>\n \n A convenience sample of 32 ankle computed tomography scans from patients \u226435\u2009years old without prior trauma, arthritis, or ankle pathology were retrospectively reviewed. Using standardized coronal (traditional DTA) and sagittal (CA\u2010DTA) reconstructions, 2 independent reviewers measured allograft concavity depth (mm) and slope angle. Paired\n t<\/jats:italic>\n tests compared traditional versus CA\u2010DTA measurements. Intraclass correlation coefficients assessed reliability. Significance was set at\n P<\/jats:italic>\n \u2009<\u2009.05.\n <\/jats:p>\n <\/jats:sec>\n \n Results<\/jats:title>\n \n The mean age of patients was 25.2\u2009years, with 50% (n\u2009=\u200918) of patients being male. Compared with the traditional DTA, the CA\u2010DTA showed significantly greater glenoid concavity change (2.9\u2009\u00b1\u20090.65\u2009mm vs \u22122.3\u2009\u00b1\u20090.71\u2009mm;\n P<\/jats:italic>\n \u2009<\u2009.001) and slope angle (22.9\u00b0\u00b1\u20094.02 vs \u22129.78\u00b0\u00b1\u20094.07;\n P<\/jats:italic>\n \u2009<\u2009.001). All CA\u2010DTAs showed positive concavity and slope, whereas all traditional DTAs produced negative values.\n <\/jats:p>\n <\/jats:sec>\n \n Conclusions<\/jats:title>\n The CA\u2010DTA consistently increased both concavity and slope, whereas the traditional DTA decreased these measures. By leveraging the posterior tibial surface, the CA\u2010DTA more reliably recreates the anatomic \u201chalf\u2010pipe\u201d glenoid contour that contributes to bony concavity\u2010compression\u2010based stability.<\/jats:p>\n <\/jats:sec>\n \n Clinical Relevance<\/jats:title>\n The CA\u2010DTA offers a graft alternative that more reliably restores glenoid concavity in anterior shoulder instability with glenoid bone loss. This has potential implications for improved glenohumeral stability and clinical outcomes.<\/jats:p>\n <\/jats:sec>","DOI":"10.1002\/arj.70610","type":"journal-article","created":{"date-parts":[[2026,10,14]],"date-time":"2026-10-14T06:46:51Z","timestamp":1791960411000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Congruent\u2010Arc Posterior Distal Tibial Allograft Shows Greater Radiographic Glenoid Concavity Compared With Traditional Lateral Tibial Allograft in Glenoid Bone Loss"],"prefix":"10.1002","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8907-3542","authenticated-orcid":false,"given":"Sailesh V.","family":"Tummala","sequence":"first","affiliation":[{"name":"Department of Orthopedic Surgery Mayo Clinic Phoenix Arizona U.S.A."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8873-2374","authenticated-orcid":false,"given":"Cara H.","family":"Lai","sequence":"additional","affiliation":[{"name":"Department of Orthopedic Surgery Mayo Clinic Phoenix Arizona U.S.A."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Saad","family":"Tarabichi","sequence":"additional","affiliation":[{"name":"Department of Orthopedic Surgery Mayo Clinic Phoenix Arizona U.S.A."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alexander","family":"Hoffer","sequence":"additional","affiliation":[{"name":"Department of Orthopedics University of British Columbia Vancouver British Columbia Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9461-4393","authenticated-orcid":false,"given":"Jonathan A.","family":"Flug","sequence":"additional","affiliation":[{"name":"Department of Orthopedic Surgery Mayo Clinic Phoenix Arizona U.S.A."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"John M.","family":"Tokish","sequence":"additional","affiliation":[{"name":"Department of Orthopedic Surgery Mayo Clinic Phoenix Arizona U.S.A."}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,10,13]]},"reference":[{"key":"e_1_2_7_2_1","doi-asserted-by":"crossref","first-page":"1286","DOI":"10.1177\/03635465231160286","article-title":"Predictors of bone loss in anterior glenohumeral instability","volume":"51","author":"Hettrich CM","year":"2023","journal-title":"Am J Sports Med"},{"key":"e_1_2_7_3_1","doi-asserted-by":"crossref","first-page":"677","DOI":"10.1053\/jars.2000.17715","article-title":"Traumatic glenohumeral bone defects and their relationship to failure of arthroscopic Bankart repairs: Significance of the inverted\u2010pear glenoid and the humeral engaging Hill\u2010Sachs lesion","volume":"16","author":"Burkhart 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