{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,4]],"date-time":"2026-10-04T11:39:15Z","timestamp":1791113955137,"version":"4.1.0"},"reference-count":35,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2012,1,31]],"date-time":"2012-01-31T00:00:00Z","timestamp":1327968000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Knee surg. sports traumatol. arthrosc."],"published-print":{"date-parts":[[2012,4]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Purpose<\/jats:title><jats:p>Objective evaluation of both antero\u2010posterior translation and rotatory laxity of the knee remains a target to be accomplished. This is true for both preoperative planning and postoperative assessment of different ACL reconstruction emerging techniques. The ideal measurement tool should be simple, accurate and reproducible, while enabling to assess both \u201canatomy\u201d and \u201cfunction\u201d during the same examination. The purpose of this study is to evaluate the clinical effectiveness of a new in\u2010house\u2010developed testing device, the so\u2010called Porto\u2010knee testing device (PKTD). The PKTD is aimed to be used on the evaluation of both antero\u2010posterior and rotatory laxity of the knee during MRI exams.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Between 2008 and 2010, 33 patients with ACL\u2010deficient knees were enrolled for the purpose of this study. All patients were evaluated in the office and under anesthesia with Lachman test, lateral pivot\u2010shift test and anterior drawer test. All cases were studied preoperatively with KT\u20101000 and MRI with PKTD, and examinations performed by independent observers blinded for clinical evaluation. During MRI, we have used a PKTD that applies antero\u2010posterior translation and permits free tibial rotation through a standardized pressure (46.7 kPa) in the proximal posterior region of the leg. Measurements were taken for both knees and comparing side\u2010to\u2010side. Five patients with partial ruptures were excluded from the group of 33.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>For the 28\u00a0remaining patients, 3 women and 25\u00a0men, with mean age of 33.4 \u00b1 9.4 years, 13 left and 15 right knees were tested. No significant correlation was noticed for Lachman test and PKTD results (n.s.). Pivot\u2010shift had a strong positive correlation with the difference in anterior translation registered in lateral and medial tibia plateaus of injured knees (cor. coefficient = 0.80; <jats:italic>p<\/jats:italic> &lt; 0.05), and with the difference in this parameter as compared to side\u2010to\u2010side (cor. coefficient = 0.83; <jats:italic>p<\/jats:italic> &lt; 0.05).<\/jats:p><jats:p>Considering the KT\u20101000 difference between injured and healthy knees, a very strong positive correlation was found for side\u2010to\u2010side difference in medial (cor. coefficient = 0.73; <jats:italic>p<\/jats:italic> &lt; 0.05) and lateral (cor. coefficient = 0.5; <jats:italic>p<\/jats:italic> &lt; 0.05) tibial plateau displacement using PKTD.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>The PKTD proved to be a reliable tool in assessment of antero\u2010posterior translation (comparing with KT\u20101000) and rotatory laxity (compared with lateral pivot\u2010shift under anesthesia) of the ACL\u2010deficient knee during MRI examination.<\/jats:p><\/jats:sec><jats:sec><jats:title>Level of evidence<\/jats:title><jats:p>Therapeutic studies, Level IV.<\/jats:p><\/jats:sec>","DOI":"10.1007\/s00167-012-1914-9","type":"journal-article","created":{"date-parts":[[2012,1,30]],"date-time":"2012-01-30T01:42:45Z","timestamp":1327887765000},"page":"671-678","source":"Crossref","is-referenced-by-count":59,"title":["Assessment of rotatory laxity in anterior cruciate ligament\u2010deficient knees using magnetic resonance imaging with Porto\u2010knee testing device"],"prefix":"10.1002","volume":"20","author":[{"given":"Jo\u00e3o","family":"Espregueira\u2010Mendes","sequence":"first","affiliation":[{"name":"<!--<label>1<\/label>--> Sa\u00fade Atl\u00e2ntica Sports Center\u2014F.C. 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