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tibial slope

Henrik Behrend, Tilman Graulich, Rene Gerlach, Christian Spross, Andreas Ladurner
PURPOSE: Alterations in patellar height and posterior tibial slope (PTS) are frequently measured radiographic parameters associated with postoperative impairments after total knee arthroplasty (TKA). Few studies correlate the clinical outcome of TKA with the radiological indices. Both the modified Insall-Salvati ratio (mISR) and the Blackburne-Peel ratio (BPR) were hypothesised to correlate with the clinical outcome after TKA. METHODS: A total of 282 computer navigated primary LCS® -TKAs, implanted in our institution from 2008 to 2012, were included...
June 8, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
Alexander Antoniadis, Roland S Camenzind, Michael O Schär, Dario Bergadano, Näder Helmy
PURPOSE: It was hypothesized that surgeon's experience as well as bone density play a significant role in achieving accurate cuts with patient-specific instrumentation (PSI). The aim of this study was to compare the accuracy of the tibial cuts in different bone densities made by a highly experienced orthopedic surgeon on one hand and a less experienced orthopedic surgeon on the other. METHODS: Tibial models from three different sawbone densities were developed for this study...
June 5, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
Kanto Nagai, Yasutaka Tashiro, Elmar Herbst, Tom Gale, Joon Ho Wang, James J Irrgang, William Anderst, Freddie H Fu
PURPOSE: To investigate the correlation between posterior tibial slope (PTS) and tibial tunnel widening after anterior cruciate ligament reconstruction (ACL-R). METHODS: Twenty-five patients underwent anatomic single-bundle ACL-R using quadriceps tendon autograft. Six months after surgery, each patient underwent high-resolution computed tomography (CT). Tibial tunnel aperture location was evaluated using a grid method. Medial and lateral PTS (°) was measured based on a previously described method...
June 4, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
Adeniyi A Borire, Tushar Issar, Natalie C Kwai, Leo H Visser, Neil G Simon, Ann M Poynten, Matthew C Kiernan, Arun V Krishnan
AIMS: Clinical and experimental studies in patients with type 1 and type 2 diabetes have demonstrated changes in ion channel function and nerve structure. In this study, we investigated the relationship between axonal dysfunction and morphological change in diabetic polyneuropathy using neuromuscular ultrasound and nerve excitability techniques. We also explored possible differences in this relationship between type 1 and type 2 diabetes. METHODS: Nerve ultrasound and corresponding motor excitability studies were undertaken in 110 diabetes patients (50 type 1;60 type 2) and 60 age-matched controls (30 for each group)...
June 1, 2018: Diabetes/metabolism Research and Reviews
Vera Jaecker, Sabrina Drouven, Jan-Hendrik Naendrup, Ajay C Kanakamedala, Thomas Pfeiffer, Sven Shafizadeh
PURPOSE: To analyze the contribution of increased lateral (LTPS) and medial tibial slopes (MTPS) as independent risk factors of graft failure following anterior cruciate ligament (ACL) reconstruction. MATERIALS AND METHODS: Fifty-seven patients with graft failure after ACL reconstruction who underwent revision surgery between 2009 and 2014 were enrolled and matched to a control group of 69 patients with primary anatomic successful ACL reconstruction. Patients were matched based on age, sex, date of primary surgery and graft type...
May 28, 2018: Archives of Orthopaedic and Trauma Surgery
Yunfeng Yao, Pengde Kang, Chenxi Xue, Juehua Jing
Objective: To compare the clinical and radiographic results between primary total knee arthroplasty (TKA) via mini-subvastus or conventional approach through a prospective randomized controlled study. Methods: Ninety-four patients (104 knees) undergoing primary TKA between January 2011 and April 2012 were evaluated and randomly divided into 2 groups. Forty-six patients (52 knees) underwent TKA via conventional approach (conventional approach group), and 48 patients (52 knees) underwent TKA via mini-subvastus approach (mini-subvastus approach group)...
February 1, 2018: Chinese Journal of Reparative and Reconstructive Surgery
Yun Zhao, Wenjin Hu, Jingmin Huang, Dongchao Li, Litao Jia, Congli Zhong, Xiaohu Zhao
Objective: To explore the short-term effectiveness of medial open wedge high tibial osteotomy (OWHTO) combined with posterior slope angle of tibial plateau correction to treat the osteoarthritis of limited flexion knee with varus deformity. Methods: The data of 18 cases (18 knee) with osteoarthritis of limited flexion knee with varus deformity between January 2014 and July 2016 were analyzed retrospectively. There were 6 males and 12 females with an average age of 54...
February 1, 2018: Chinese Journal of Reparative and Reconstructive Surgery
Shimin Zhang, Sunjun Hu, Shouchao Du, Zhuo Ma
Objective: To summarize the progress in the treatment of hyperextension tibial plateau fractures. Methods: Related literature concerning hyperextension tibial plateau fractures was reviewed and analyzed in terms of injury mechanisms, clinical patterns, and treatment outcomes. Results: Hyperextension tibial plateau fractures is a specific type of hyperextension knee injuries, which is happened with the knee in over-extended position (<0°) and characterized by fracture and concomitant ligament injury...
April 1, 2018: Chinese Journal of Reparative and Reconstructive Surgery
Ashraf El Mansori, Timothy Lording, Antoine Schneider, Raphael Dumas, Elvire Servien, Sebastien Lustig
AIM OF THE WORK: Injury to the anterior cruciate ligament (ACL) is frequently accompanied by tears of the menisci. Some of these tears occur at the time of injury, but others develop over time in the ACL-deficient knee. The aim of this study was to evaluate the effects of the patient characteristics, time from injury (TFI), and posterior tibial slope (PTS) on meniscal tear patterns. Our hypothesis was that meniscal tears would occur more frequently in ACL-deficient knees with increasing age, weight, TFI, PTS, and in male patients...
May 26, 2018: International Orthopaedics
Alberto Grassi, Cecilia Signorelli, Francisco Urrizola, Federico Raggi, Luca Macchiarola, Tommaso Bonanzinga, Stefano Zaffagnini
BACKGROUND: Until now, there has been a lack of in vivo analysis of the correlation between bony morphological features and laxity values after an anterior cruciate ligament (ACL) injury. METHODS: Forty-two patients who underwent ACL-reconstruction were enrolled. Static laxity was evaluated as: antero-posterior displacement and internal-external rotation at 30° and 90° of flexion (AP30, AP90, IE30, IE90) and varus-valgus rotation at 0° and 30° of flexion (VV0, VV30)...
May 23, 2018: Knee
Yonggang Tu, Shaodong Ren, Bolin Ye, Bangxing Ma, Shifei Zhang, Haobin Yuan
Objective: To explore the effectiveness of limited incision, poking reduction, and simple internal fixation in the treatment of collapsed fractures of the posterolateral tibial plateau. Methods: Between October 2010 and January 2016, 16 patients with collapsed fractures of the posterolateral tibial plateau underwent posterolateral incision, poking reduction, and simple internal fixation. There were 10 males and 6 females with the age of 22-63 years (mean, 43.5 years)...
July 1, 2017: Chinese Journal of Reparative and Reconstructive Surgery
Sung-Sahn Lee, Kyung-Wook Nha, Dae-Hee Lee
PURPOSE: This study was designed to analyze the relationship between changes in posterior tibial slope and the absence or presence of lateral hinge fracture, diagnosed in the sagittal and axial planes, as well as the coronal plane, by computed tomography (CT) following opening wedge high tibial osteotomy (HTO). METHODS: This study involved 55 patients (55 knees) undergoing opening wedge HTO for primary medial osteoarthritis. Lateral hinge fractures were evaluated on CT scans according to the Takeuchi classification and were also classified as subtypes A, B, and C, depending on anterior, posterior, and both anterior and posterior cortical disruptions, respectively, as determined by the sagittal and axial planes of CT scans which corresponded to the fracture line visible on coronal CT scans...
May 21, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
Alois Franz, Christoph Kolja Boese, Andrej Matthies, Jörg Leffler, Christian Ries
Unicompartmental knee arthroplasty (UKA) has gained growing popularity over the last decades. The posterior tibial slope (PTS) has been shown to play a significant role for knee biomechanics and is thought to be crucial for clinical function of the UKA. We evaluated the clinical outcome at mid-term follow-up after UKA. Furthermore, the reconstruction of the individual PTS was analyzed. A total of 91 consecutive patients undergoing medial UKA for osteoarthritis were included. Patients were contacted by telephone for a survival analysis at a minimum of 30 months after surgery...
May 21, 2018: Journal of Knee Surgery
Muzaffer Düzgünoglu, Wolfgang Hönle, Alexander Scheller, Alexander Schuh
BACKGROUND: The aim of the study is to show whether there are any changes in quality or incidence of complications in total knee arthroplasty (TKA) after establishing a centre for endoprothesis (EPZ). MATERIAL AND METHODS: We conducted a retrospective study comparing 100 TKAs one year before establishing an EPZ (Group I) with 100 TKAs one year after establishing an EPZ (group II). Data were collected by analysing our electronic documentation system, and the report of the rehabilitation hospital...
May 18, 2018: Zeitschrift Für Orthopädie und Unfallchirurgie
Robert N Kent, Mark J Amirtharaj, Brendan M Hardy, Andrew D Pearle, Thomas L Wickiewicz, Carl W Imhauser
Knee instability following anterior cruciate ligament (ACL) rupture compromises function and increases risk of injury to the cartilage and menisci. To understand the biomechanical function of the ACL, previous studies have primarily reported the net change in tibial position in response to multiplanar torques, which generate knee instability. In contrast, we retrospectively analyzed a cohort of 13 consecutively tested cadaveric knees and found distinct motion patterns, defined as the motion of the tibia as it translates and rotates from its unloaded, initial position to its loaded, final position...
April 11, 2018: Journal of Biomechanics
Philipp Schuster, Markus Geßlein, Michael Schlumberger, Philipp Mayer, Jörg Richter
BACKGROUND: Young patients with severe medial osteoarthritis, varus malalignment and insufficiency of the anterior cruciate ligament (ACL) are difficult to treat. The tibial slope has gained attention with regard to osteotomies and ligamentous instability. The purpose was to evaluate the outcome of combined high tibial osteotomy (HTO), ACL reconstruction and chondral resurfacing (CR, abrasion plus microfracture), and to analyse graft failure rates with regard to the tibial slope. METHODS: Fifty cases (48...
May 3, 2018: Knee
João V Novaretti, Andrew J Sheean, Jayson Lian, Joseph De Groot, Volker Musahl
PURPOSE OF REVIEW: The purposes of this review are to (1) describe the anatomic and biomechanical rationale for high tibial osteotomy (HTO) in the setting of posterior cruciate ligament (PCL) deficiency, (2) review the indications for concomitant HTO and PCL reconstruction, (3) provide guidance for the clinical assessment of the patient with suspected PCL deficiency, and (4) summarize the key surgical steps necessary to attain the appropriate sagittal and coronal plane corrections. RECENT FINDINGS: The preponderance of available biomechanical data pertaining to the PCL-deficient knee suggests that an increased proximal tibial slope limits posterior tibial translation under axial compressive loads...
June 2018: Current Reviews in Musculoskeletal Medicine
Do Kyung Lee, Kwang Kyoun Kim, Chang Uk Ham, Seok Tae Yun, Byung Kag Kim, Kwang Jun Oh
Purpose: The purpose of this study was to investigate whether surgical experience could improve surgical competency in medial open wedge high tibial osteotomy (MOWHTO). Materials and Methods: One hundred consecutive cases of MOWHTO were performed with preoperative planning using the Miniaci method. Surgical errors were defined as under- or overcorrection, excessive posterior slope change, or the presence of a lateral hinge fracture. Each of these treatment failures was separately evaluated using the cumulative summation test for learning curve (LC-CUSUM)...
April 30, 2018: Knee Surgery & related Research
Kyoung-Tak Kang, Sae Kwang Kwon, Juhyun Son, Oh-Ryong Kwon, Jun-Sang Lee, Yong-Gon Koh
PURPOSE: This study aims to clarify the influence of the posterior tibial slope (PTS) on knee joint biomechanics after posterior-stabilized (PS) total knee arthroplasty (TKA) using a computer simulation. METHODS: A validated TKA computational model was used to evaluate and quantify the effects of an increased PTS. In order to conduct a squat simulation, models with a - 3° to 15° PTS using increments of 3° were developed. Forces on the quadriceps and collateral ligament, a tibial posterior translation, contact point on a polyethylene (PE) insert, and contact stress on the patellofemoral (PF) joint and post in a PE insert were compared...
April 5, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
Sanne Lotte Journée, Henricus Louis Journée, Cornelis Marinus de Bruijn, Cathérine John Ghislaine Delesalle
BACKGROUND: There are indications that transcranial electrical stimulation (TES) assesses the motor function of the spinal cord in horses in a more sensitive and reproducible fashion than transcranial magnetic stimulation (TMS). However, no normative data of TES evoked motor potentials (MEP) is available. RESULTS: In this prospective study normative data of TES induced MEP wave characteristics (motor latency times (MLT); amplitude and waveform) was obtained from the extensor carpi radialis (ECR) and tibial cranialis (TC) muscles in a group of healthy horses to create a reference frame for functional diagnostic purposes...
April 3, 2018: BMC Veterinary Research
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