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tibial slope

Tetsuro Ushio, Hideki Mizu-Uchi, Ken Okazaki, Yuan Ma, Umito Kuwashima, Yukihide Iwamoto
BACKGROUND: We evaluated the effect of cutting surface on the anteroposterior (AP) axis of the proximal tibia using a 3-dimensional (3D) bone model to ensure proper tibial rotational alignment in total knee arthroplasty. METHODS: 3D bone models were reconstructed from the preoperative computed tomography data of 93 Japanese osteoarthritis knees with varus deformity. The AP axis was defined as the perpendicular bisector of the medial and lateral condylar centers in a 3D coordinate system...
September 28, 2016: Journal of Arthroplasty
Kwang-Jun Oh, Young-Bong Ko, Sagar Jaiswal, In-Cheul Whang
The purpose of this study was to compare the osteoconductivity, and absorbability of hydroxyapatite or beta-tricalcium phosphate in clinical scenario of opening wedge high tibial osteotomy Total 41 knees of 40 patients with follow up period of more than 1 year were enrolled. These patients were divided into two groups, Group I (22 knees, 21 patients) used hydroxyapatite and Group II (19 knees, 19 patients) used beta-tricalcium phosphate as a substitute in the opening gap. According to proven method, the osteoconductivity was assessed radiographically by the extent of new bone formation at osteotomy space and absorbability was evaluated by measuring the area occupied by substitute at immediate postoperative, postoperative 6 months and 1 year...
December 2016: Journal of Materials Science. Materials in Medicine
Steven T Hendrix, Austin M Barrett, Bopha Chrea, William H Replogle, Josie M Hydrick, Gene R Barrett
Is there a correlation between increased posterior-inferior tibial slope angle and noncontact anterior cruciate ligament (ACL) injury? Does increasing the posterior-inferior tibial slope angle increase the risk of bilateral ACL injury? A computerized relational database (Access 2007; Microsoft Inc, Redmond, Washington) was used to conduct a retrospective review of patients undergoing bilateral or unilateral ACL reconstruction surgery or treatment by a single surgeon between 1995 and 2013. Included in the study were patients with bilateral and unilateral ACL injuries and patellofemoral pain syndrome with no associated ACL deficiency...
October 18, 2016: Orthopedics
Nicole L Zaino, Mark J Hedgeland, Mario J Ciani, Alexander Martin Clark, Laurel Kuxhaus, Arthur J Michalek
Animal joints are valuable proxies for those of humans in biomechanical studies, however commonly used quadruped knees differ greatly from human knees in scale and morphometry. To test the suitability of the cervine stifle joint (deer knee) as a laboratory model, gross morphometry, ACL cross section, and ACL rupture strength were measured and compared to values previously reported for the knees of humans and commonly studied animals. Twelve knee joints from wild white-tailed deer were tested. Several morphometry parameters, including bicondylar width (53...
October 7, 2016: Annals of Biomedical Engineering
Michael E Steinhaus, Alexander S McLawhorn, Shawn S Richardson, Patrick Maher, David J Mayman
BACKGROUND: Proper alignment of total knee arthroplasty (TKA) is essential for TKA function and may reduce the risk of aseptic failure. Technologies that prevent malalignment may reduce the risk of revision surgery. QUESTIONS/PURPOSES: The purpose of this study was to compare two competing TKA systems that purport improved alignment: patient-specific instrumentation (PSI), and a handheld portable navigation device (NAV). METHODS: After IRB approval, 49 consecutive PSI TKAs (40 patients) were matched based on preoperative characteristics to 49 NAV TKAs (40 patients) performed by a single surgeon...
October 2016: HSS Journal: the Musculoskeletal Journal of Hospital for Special Surgery
James Yan, Volker Musahl, Jeffrey Kay, Moin Khan, Nicole Simunovic, Olufemi R Ayeni
PURPOSE: This systematic review evaluates radiographic and clinical outcome reporting following navigated high tibial osteotomy (HTO). Conventional HTO was used as a control to compare outcomes and furthermore investigate the quality of evidence in studies reporting outcomes for navigated HTO. It was hypothesized that navigated HTO will show superior clinical and radiographic outcomes compared to conventional HTO. METHODS: Two independent reviewers searched PubMed, Ovid (MEDLINE), EMBASE, and Cochrane databases for studies reporting outcomes following navigated HTO...
September 24, 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
Clemens Gwinner, Andreas Weiler, Manoussos Roider, Frederik M Schaefer, Tobias M Jung
BACKGROUND: The reported failure rate after posterior cruciate ligament (PCL) reconstruction remains high. Previous studies have shown that the tibial slope (TS) influences sagittal plane laxity. Consequently, alterations of TS might have an effect on postoperative knee stability after PCL reconstruction. HYPOTHESIS: We hypothesized that flattening of TS is associated with increased posterior laxity after PCL reconstruction. STUDY DESIGN: Cohort study; Level of evidence 3...
September 20, 2016: American Journal of Sports Medicine
Abolfazl Bagherifard, Mahmoud Jabalameli, Hosseinali Hadi, Mohammad Rahbar, Mohammadreza Minator Sajjadi, Ali Jahansouz, Hossein Karimi Heris
BACKGROUND: Tibial plateau fractures can be successfully fixed utilizing 3.5 mm locking plates. However, there are some disadvantages to using these plates. OBJECTIVES: In the current prospective study, we investigated the outcome of treating different types of tibial plateau fractures with 3.5 mm simple plates which, to our knowledge, has not been evaluated in previous studies. MATERIALS AND METHODS: Between 2011 and 2013, 32 patients aged 40 ± 0...
May 2016: Trauma Monthly
W Charles Lockwood, Daniel Cole Marchetti, Kimi D Dahl, Jacob D Mikula, Brady T Williams, Matthew M Kheir, Travis Lee Turnbull, Robert F LaPrade
PURPOSE: In order to minimize viscoelastic elongation of ACL reconstruction grafts, preconditioning protocols have been employed in clinical practice prior to final graft fixation. The purpose of this study was to evaluate two separate high-load static preconditioning protocols of double-looped semitendinosus-gracilis grafts and compare these results to both a current clinical protocol and a control group with no preconditioning protocol applied. It was hypothesized that a high-load, static preconditioning protocol would minimize graft elongation during a simulated progressive early rehabilitation compared to both the "89 N" clinical protocol and control groups...
September 13, 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
Chase S Dean, Jorge Chahla, Lauren M Matheny, Tyler R Cram, Samuel G Moulton, Grant J Dornan, Justin J Mitchell, Robert F LaPrade
PURPOSE: To document the effectiveness of a novel technique to decrease tibial slope in patients who underwent a proximal opening-wedge osteotomy with an anteriorly sloped plate placed in a posteromedial position. The hypothesis was that posteromedial placement of an anteriorly sloped osteotomy plate with an adjunctive anterior bone staple on the tibia would decrease, and maintain, the tibial slope correction at a minimum of 6 months following the osteotomy. METHODS: All patients who underwent biplanar medial opening-wedge proximal tibial osteotomy with anterior staple augmentation to decrease sagittal plane tibial slope were included, and data were collected prospectively and reviewed retrospectively...
September 9, 2016: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
Nikolai Briffa, Mohamed A Imam, Ravi Mallina, Ashraf Abdelkafy, Ajeya Adhikari
PURPOSE: Accurate component alignment in total knee replacement (TKR) is one of the important factors in determining long-term survivorship. This has been achieved by conventional jigs, computer-assisted technology (CAS) and more recently patient-specific instrumentation (PSI). The purpose of the current study was to investigate the in vivo accuracy of Trumatch™ PSI using validated pin-less computer navigation system. METHOD: Twenty consecutive selected patients that fulfilled our inclusion/exclusion criteria underwent TKR using PSI...
September 7, 2016: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
Marco Corgiat Loia, Stefania Vanni, Federica Rosso, Davide Edoardo Bonasia, Matteo Bruzzone, Federico Dettoni, Roberto Rossi
Opening wedge high tibial osteotomy (OWHTO) is a surgical procedure that aims to correct the weight-bearing axis of the knee, moving the loads laterally from the medial compartment. Conventional indications for OWHTO are medial compartment osteoarthritis and varus malalignment of the knee; recently OWHTO has been used successfully in the treatment of double and triple varus. OWHTO, in contrast to closing wedge high tibial osteotomy, does not require fibular osteotomy or peroneal nerve dissection, or lead to disruption of the proximal tibiofibular joint and bone stock loss...
April 2016: Joints
Yuanjun Teng, Laiwei Guo, Meng Wu, Tianen Xu, Lianggong Zhao, Jin Jiang, Xiaoyun Sheng, Lihu Xu, Bo Zhang, Ning Ding, Yayi Xia
BACKGROUND: Consistent reference data used for anatomic posterior cruciate ligament (PCL) reconstruction is not well defined. Quantitative guidelines defining the location of PCL attachment would aid in performing anatomic PCL reconstruction. The purpose was to characterize anatomic parameters of the PCL tibial attachment based on magnetic resonance imaging (MRI) in a large population of adult knees. METHODS: The PCL tibial attachment site was examined in 736 adult knees with an intact PCL using 3...
2016: BMC Musculoskeletal Disorders
Douglas S Weinberg, Drew F K Williamson, Jeremy J Gebhart, Derrick M Knapik, James E Voos
BACKGROUND: Injuries to the anterior cruciate ligament (ACL) are common, and a number of knee morphological variables have been identified as risk factors for an ACL injury, including the posterior tibial slope (TS). However, limited data exist regarding innate population differences in the TS. PURPOSE: To (1) establish normative values for the medial and lateral posterior TS; (2) determine what differences exist between ages, sexes, and races; and (3) determine how internal or external tibial rotation (as occurs during sagittal knee motion) influences the stereotactic perception of the TS...
September 1, 2016: American Journal of Sports Medicine
Rodney K Summers, Amirhesam Amerinatanzi, Timothy E Hewett, Edward Nyman, Vijay K Goel
No abstract text is available yet for this article.
May 2016: Medicine and Science in Sports and Exercise
W Cw Chan, E Pinder, M Loeffler
PURPOSE: To compare patient-specific instrumentation (PSI) with conventional instrumentation in total knee arthroplasty (TKA) in terms of component alignment, operating time, and the learning curve required in a non-teaching hospital. METHODS: Records of 33 men and 29 women aged 50 to 88 (mean, 71) years who underwent TKA for osteoarthritis using PSI (n=31) or conventional instrumentation (n=31) by a single surgeon were reviewed. The choice of instrumentation was made by the patient; the surgeon did not express any preference and had not used PSI before...
August 2016: Journal of Orthopaedic Surgery
Tineke De Coninck, Frederik Vanrietvelde, Patrick Seynaeve, Peter Verdonk, Koenraad Verstraete
BACKGROUND: In cadaveric and arthroscopic studies different insertion locations of the anterior horn of the medial meniscus (AHMM) have been described. PURPOSE: To investigate if the different insertion locations of the AHMM, as described in cadaveric studies, can be determined on magnetic resonance imaging (MRI). MATERIAL AND METHODS: MR images of 100 patients without meniscal tears on MRI were retrospectively evaluated. Two observers classified the AHMM insertion based on its position relative to the anterior tibial edge and the medial tibial spine...
August 23, 2016: Acta Radiologica
Young-Soo Shin, Keong-Ho Kim, Hyun-Bo Sim, Jung-Ro Yoon
BACKGROUND: An adequate stable fixation implant should be used for medial opening-wedge high tibial osteotomy (MOWHTO) to promote rapid bone healing without complications. This study compared the radiographic and clinical outcomes as well as plate-specific complications between two angular stable locking plates in patients following MOWHTO. METHOD: This prospective study involved 97 patients (50 with DWL(®), group I; 47 with TomoFix™, group II) undergoing MOWHTO for primary medial compartment osteoarthritis between 2010 and 2013...
August 11, 2016: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
James G Levins, Daniel R Sturnick, Erin C Argentieri, Mack Gardner-Morse, Pamela M Vacek, Michael J Desarno, Timothy W Tourville, James R Slauterbeck, Bruce D Beynnon
BACKGROUND: Anterior cruciate ligament (ACL) graft rupture occurs at a high rate, especially in young athletes. The geometries of the tibial plateau and femoral intercondylar notch are risk factors for first-time ACL injury; however, little is known about the relationship between these geometries and risk of ACL graft rupture. HYPOTHESIS: The geometric risk factors for noncontact graft rupture are similar to those previously identified for first-time noncontact ACL injury, and sex-specific differences exist...
October 2016: American Journal of Sports Medicine
Yoshio Onishi, Kazunori Hino, Seiji Watanabe, Kunihiko Watamori, Tatsuhiko Kutsuna, Hiromasa Miura
BACKGROUND: The influence of tibial resection on the joint gap and on stability against posterior laxity in posterior cruciate ligament-retaining total knee arthroplasty (CR-TKA) remains unclear. In addition, there are no detailed reports regarding how much of the tibial attachment of the posterior cruciate ligament (PCL) is preserved during tibial resection. Our goals were to evaluate the influence of tibial resection on the intraoperative joint gap and on postoperative anteroposterior stability in a clinical population, and to assess the preserved area of the tibial PCL attachment using cadaveric knees...
August 5, 2016: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
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