{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,15]],"date-time":"2026-10-15T07:50:02Z","timestamp":1792050602081,"version":"4.4.0"},"reference-count":12,"publisher":"Wiley","license":[{"start":{"date-parts":[[2026,9,26]],"date-time":"2026-09-26T00:00:00Z","timestamp":1790380800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,9,26]],"date-time":"2026-09-26T00:00:00Z","timestamp":1790380800000},"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":"Abstract<\/jats:title>\n Patella alta remains among the most critical anatomical risk factors for recurrent patellofemoral instability and failure of patellar stabilization surgery. The Caton\u2010Deschamps index references the patella to the tibia by measuring the position of the patella relative to the anterosuperior margin of the tibial plateau. In contrast, the patellotrochlear index references the patella to the femoral trochlea by quantifying the proportion of patellar articular cartilage that shows\u00a0sagittal overlap with trochlear cartilage on magnetic resonance imaging. Under normal trochlear morphology, these measurements closely covary, but they diverge in the presence of abnormal morphology. In high\u2010grade trochlear dysplasia, the proximal trochlea is elongated, flattened, and often convex beneath a supratrochlear spur. The patella overlaps an expanded cartilage surface that provides minimal osseous constraint. Contact does not equate to containment. Therefore, a reference\u2010range patellotrochlear index alone is insufficient to exclude a dysplastic knee from consideration for distalizing tibial tubercle osteotomy. Neither index correlates with the instability resolution angle obtained during examination under anesthesia, indicating that static imaging parameters do not fully capture dynamic patellofemoral containment. We must stop letting single 2\u2010dimensional cutoffs dictate complex, 3\u2010dimensional surgical decisions.<\/jats:p>","DOI":"10.1002\/arj.70647","type":"journal-article","created":{"date-parts":[[2026,9,26]],"date-time":"2026-09-26T08:11:33Z","timestamp":1790410293000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Editorial Commentary<\/i>\n : Contact Is Not Containment: In High\u2010Grade Trochlear Dysplasia, the Patellotrochlear Index Quantifies Cartilage Overlap in the Absence of Osseous Constraint"],"prefix":"10.1002","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8129-5514","authenticated-orcid":false,"given":"Dustin J.","family":"Kress","sequence":"first","affiliation":[{"name":"Michigan State University East Lansing Michigan U.S.A."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7077-0057","authenticated-orcid":false,"given":"Toufic R.","family":"Jildeh","sequence":"additional","affiliation":[{"name":"Michigan State University East Lansing Michigan U.S.A."}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,9,26]]},"reference":[{"key":"e_1_2_3_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.arthro.2024.01.036"},{"key":"e_1_2_3_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.arthro.2024.03.008"},{"key":"e_1_2_3_4_1","first-page":"xx","article-title":"High\u2010grade trochlear dysplasia confounds patellar height assessment using the magnetic resonance imaging\u2010derived patellotrochlear and radiograph\u2010derived Caton\u2010Deschamps indices","author":"Ackermann J","year":"2026","journal-title":"Arthroscopy."},{"key":"e_1_2_3_5_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00167-005-0015-4"},{"key":"e_1_2_3_6_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.knee.2025.10.017"},{"key":"e_1_2_3_7_1","doi-asserted-by":"publisher","DOI":"10.2214\/AJR.09.2729"},{"key":"e_1_2_3_8_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00256-018-3040-3"},{"key":"e_1_2_3_9_1","doi-asserted-by":"publisher","DOI":"10.1002\/ksa.12158"},{"key":"e_1_2_3_10_1","doi-asserted-by":"publisher","DOI":"10.1177\/23259671251395739"},{"key":"e_1_2_3_11_1","doi-asserted-by":"publisher","DOI":"10.1055\/s-0038-1641174"},{"key":"e_1_2_3_12_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.asmr.2024.101066"},{"key":"e_1_2_3_13_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.arthro.2024.07.002"}],"container-title":["Arthroscopy"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/arthroscopyjournals.onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/arj.70647","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/arthroscopyjournals.onlinelibrary.wiley.com\/doi\/full-xml\/10.1002\/arj.70647","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/arthroscopyjournals.onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/arj.70647","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,10,15]],"date-time":"2026-10-15T07:02:34Z","timestamp":1792047754000},"score":1,"resource":{"primary":{"URL":"https:\/\/arthroscopyjournals.onlinelibrary.wiley.com\/doi\/10.1002\/arj.70647"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,9,26]]},"references-count":12,"alternative-id":["10.1002\/arj.70647"],"URL":"https:\/\/doi.org\/10.1002\/arj.70647","archive":["Portico"],"relation":{},"ISSN":["0749-8063","1526-3231"],"issn-type":[{"value":"0749-8063","type":"print"},{"value":"1526-3231","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,9,26]]},"assertion":[{"value":"2026-09-26","order":3,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}],"article-number":"arj.70647"}}