{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,11,5]],"date-time":"2026-11-05T23:24:49Z","timestamp":1793921089638,"version":"4.8.0"},"reference-count":21,"publisher":"Wiley","issue":"5","license":[{"start":{"date-parts":[[2022,12,14]],"date-time":"2022-12-14T00:00:00Z","timestamp":1670976000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2022,12,14]],"date-time":"2022-12-14T00:00:00Z","timestamp":1670976000000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"},{"start":{"date-parts":[[2022,12,14]],"date-time":"2022-12-14T00:00:00Z","timestamp":1670976000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.elsevier.com\/tdm\/userlicense\/1.0\/"},{"start":{"date-parts":[[2022,12,14]],"date-time":"2022-12-14T00:00:00Z","timestamp":1670976000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.elsevier.com\/legal\/tdmrep-license"}],"funder":[{"DOI":"10.13039\/501100010451","name":"Hunan Province Health Commission","doi-asserted-by":"publisher","award":["20201907"],"award-info":[{"award-number":["20201907"]}],"id":[{"id":"10.13039\/501100010451","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100017695","name":"Health Commission of Hunan Province","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100017695","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["arthroscopyjournal.org","clinicalkey.com","clinicalkey.com.au","clinicalkey.es","clinicalkey.fr","clinicalkey.jp","elsevier.com","sciencedirect.com"],"crossmark-restriction":true},"short-container-title":["Arthroscopy"],"published-print":{"date-parts":[[2023,5]]},"abstract":"<jats:sec>\n                    <jats:title>Purpose<\/jats:title>\n                    <jats:p>To verify the reliability of patellar tendon\u2013trochlear groove angle (PTTG\u2010A) measured by computed tomography (CT) and the clinical significance in evaluation of patellar instability.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>A retrospective study of hospitalized patients with knee pain or injury and had knee CT from January 2017 to June 2021 was performed. PTTG\u2010A and tibial tuberosity\u2013trochlear groove (TT\u2010TG) distance were measured on CT. Spearman correlation analysis was analyzed between the 2 measurements. The intraclass correlation coefficient was determined for inter\u2010 and intraobserver reproducibility. The capacity of PTTG\u2010A and TT\u2010TG to predict patellar instability was evaluated by the receiver operating characteristic curve. Data from the control group were used to determine the pathologic thresholds and logistic regression analysis.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      Included were 113 patients. There were 60 patients with the history of at least 2 episodes of patellar dislocation (study group) and 53 patients without a history of patellar dislocation (control group). The respective PTTG\u2010A and TT\u2010TG distances in the study group (35.2 \u00b1 8.4\u00b0 and 19.6 \u00b1 4.6 mm) were significantly greater than those of the controls (20.8 \u00b1 5.8\u00b0 and 13.3 \u00b1 4.5 mm) (\n                      <jats:italic>P<\/jats:italic>\n                      &lt; .001). The correlation between the 2 measurements was strong (r\u00a0= 0.730,\n                      <jats:italic>P<\/jats:italic>\n                      &lt; .001). The inter\u2010 and intraobserver reliability of the PTTG\u2010A were better than TT\u2010TG distance in both groups. The AUC of PTTG\u2010A was greater than that of the TT\u2010TG distance (0.895 vs 0.769, respectively). With the cutoff value of PTTG\u2010A and TT\u2010TG being 26.3\u00b0 and 16.3 mm, the value of the pathologic threshold of PTTG\u2010A was 30.0\u00b0, with a dominance ratio of 16.88 (95% confidence interval 2.88\u201098.89,\n                      <jats:italic>P<\/jats:italic>\n                      \u00a0= .002).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>The PTTG\u2010A measured on a single CT slice of the distal femoral trochlear groove is a more reliable measurement than TT\u2010TG distance for the prediction of patellar instability.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Level of Evidence<\/jats:title>\n                    <jats:p>III; A retrospective cohort study.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1016\/j.arthro.2022.11.021","type":"journal-article","created":{"date-parts":[[2022,12,14]],"date-time":"2022-12-14T07:29:12Z","timestamp":1671002952000},"page":"1244-1250","update-policy":"https:\/\/doi.org\/10.1016\/elsevier_cm_policy","source":"Crossref","is-referenced-by-count":7,"title":["Patellar Tendon\u2013Trochlear Groove Angle Measured on a Single Computed Tomography Slice of the Distal Femoral Trochlear Groove Is a Reliable Measurement for the Evaluation of Patellar Instability"],"prefix":"10.1002","volume":"39","author":[{"given":"Zhu","family":"Dai","sequence":"first","affiliation":[{"name":"Department of Orthopedics the First Affiliated Hospital Hengyang Medical School University of South China Hunan China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jian","family":"Li","sequence":"additional","affiliation":[{"name":"Department of Orthopedics the First Affiliated Hospital Hengyang Medical School University of South China Hunan 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