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Knee Surgery & related Research

Sang Jun Song, Se Gu Kang, Cheol Hee Park, Dae Kyung Bae
Purpose: The purposes of this study were to compare clinical results after total knee arthroplasty (TKA) using the Attune and PFC Sigma knee designs and to investigate whether the use of the Attune prosthesis increased the risk of patellar injury in Asian patients. Materials and Methods: Three hundred knees that underwent TKA using Attune (group A) were compared to 300 knees that underwent TKA using PFC Sigma (group B). The Knee Society knee score (KS) and function score (FS), and range of motion (ROM) were compared...
August 31, 2018: Knee Surgery & related Research
Denis Pak-Han Koong, Vincent Vinh Gia An, Peter Lorentzos, Peter Moussa, Brahman Shankar Sivakumar
Isolated rupture of the popliteus tendon is uncommon; instead, it is often seen as part of multi-ligamentous posterolateral corner injuries. In this report, we present a case of a 22-year-old professional rugby player who sustained a lateral blow to his semi-flexed knee in a tackle during a competitive game. A complete popliteus tendon rupture at its musculo-tendinous junction was diagnosed on magnetic resonance imaging despite a relatively unremarkable physical examination. The aims of this report are to highlight the diagnostic challenges with this rare injury as physical signs are often subtle and non-specific...
September 1, 2018: Knee Surgery & related Research
Max Ekdahl, Marcelo Acevedo, Cristian Dominguez, Maximiliano Barahona, Rodrigo Hernandez, Ignacio Mujica
Purpose: To determine the accuracy of knee examination under anesthesia (EUA) and develop a prognostic score for partial anterior cruciate ligament (ACL) tears. Materials and Methods: A total of 229 patients with an ACL injury were included. Knee EUA was performed using the Lachman test, pivot shift test and arthrometric maximum manual side-to-side difference (AMMD) test. The arthroscopic examination is the gold standard for the diagnosis of partial and complete ACL tears, which was compared with EUA findings...
September 1, 2018: Knee Surgery & related Research
Kyu Sung Chung, Tae Yang Shin, Sang Hoon Park, Hyuck Kim, Choong Hyeok Choi
Purpose: To investigate the incidence of venous thromboembolism (VTE) after total knee arthroplasty (TKA) with chemoprophylaxis using acetylsalicylic acid (AA) or rivaroxaban in Korean patients. Materials and Methods: Between May 2011 and November 2013, 268 TKA patients (330 cases) were randomly allocated to 3 groups (group A: subcutaneous injection of 5,000 IU low-molecular-weight heparin for 2 days followed by oral administration of 100 mg AA for 5 days; group X7: oral administration of 10mg rivaroxaban for 7 days; and group X10: oral administration of 10 mg rivaroxaban for 10 days)...
September 1, 2018: Knee Surgery & related Research
Kazuhiro Murayama, Hiroshi Nakayama, Tomohiko Murakami, Shinichi Yoshiya, Shuhei Otsuki, Toshiya Tachibana
Purpose: The purpose of this study was to evaluate the effect of concomitant arthroscopic lateral release (LR) in open wedge high tibial osteotomy (OWHTO) by comparing the pre- and postoperative radiological parameters of patellar position and orientation. Materials and Methods: The study was comprised of 19 knees undergoing OWHTO and concomitant LR and 18 knees undergoing OWHTO alone. Radiological parameters for patellar position and orientation included the Caton-Deschamps index (CDI), Blackburne-Peel index (BPI), patellar tilting angle (PTA), patellar lateral shift (PLS), and patellofemoral distance (PFD), which were evaluated in the preoperative period and at one year after surgery...
September 1, 2018: Knee Surgery & related Research
Sang-Gyun Kim, Hyun-Gon Kim, Seung-Yup Lee, Hong-Chul Lim, Ji-Hoon Bae
Purpose: This study was conducted to investigate the outcomes of bearing exchange for the treatment of mobile bearing dislocation in medial unicompartmental knee arthroplasty (UKA). Materials and Methods: We retrospectively reviewed 18 patients (15 females and 3 males, mean age of 65 years) treated with bearing exchange following mobile bearing dislocation in medial UKA. The occurrence of bearing redislocation, the Oxford Knee Score, and radiographic changes at the last follow-up were investigated...
September 1, 2018: Knee Surgery & related Research
Joshua T Steere, Michael C Sobieraj, Christopher J DeFrancesco, Craig L Israelite, Charles L Nelson, Atul F Kamath
Purpose: Obesity is a risk factor for aseptic loosening after total knee arthroplasty (TKA). Prophylactic use of tibial stems may enhance tibial fixation in obese patients. The aim of this study was to determine whether a tibial stem extension decreases rates of early failure in obese patients. Materials and Methods: This study included 178 consecutive primary TKAs (143 patients) with a body mass index ≥35 kg/m2 . Fifty TKAs were performed with the use of a 30 mm tibial stem extension, and 128 TKAs were performed with a standard tibial component...
September 1, 2018: Knee Surgery & related Research
Vivek Tiwari, Chang Kyu Park, Seon Woo Lee, Moon Ju Kim, Jeong Seong Seong, Tae Kyun Kim
Purpose: To compare extended care facility (ECF) and home as discharge destination after total knee arthroplasty (TKA) at a single high-volume tertiary center in South Korea. Materials and Methods: We retrospectively analyzed 1,120 primary TKAs (614 patients) performed between January 2012 and December 2013. A telephonic survey was conducted to determine discharge destination. The data reviewed included demographic and surgical data, functional outcome at 2 years and complications within 3 months...
September 1, 2018: Knee Surgery & related Research
Se Gu Kang, Cheol Hee Park, Sang Jun Song
Although stems improve initial mechanical stability in revision total knee arthroplasty (TKA), ideal indications, proper lengths and diameters, and appropriate fixation methods remain controversial. The topics of the present article include the indications, selection of lengths and diameters, and fixation methods of stems in revision TKA. The use of a stem in revision TKA can protect the juxta-articular bone. A stem cannot be a substitute for optimal component fixation; it plays an adjunctive role in transferring the loads from the compromised metaphysis to the stronger diaphysis...
September 1, 2018: Knee Surgery & related Research
Hua Feng
No abstract text is available yet for this article.
September 1, 2018: Knee Surgery & related Research
Young-Soo Shin, Jung-Ro Yoon, Hee-Sun Kim, Seon-Heui Lee
Purpose: Bone marrow (BM) is frequently used as a source of mesenchymal stem cells (MSCs) because they have a high potential for differentiation. However, it is unclear whether BM-derived MSCs lead to better clinical and magnetic resonance imaging (MRI) outcomes postoperatively. Materials and Methods: This meta-analysis compared the clinical and MRI outcomes in patients with knee osteoarthritis (OA) treated with BM-derived MSCs. Eight studies comparing the clinical and MRI outcomes assessed with various measurement tools in patients with knee OA treated with BM-derived MSCs were included...
September 1, 2018: Knee Surgery & related Research
Patrick Prager, Manuela Kunz, Regina Ebert, Ludger Klein-Hitpass, Jakob Sieker, Thomas Barthel, Franz Jakob, Christian Konrads, Andre Steinert
Purpose: Mesenchymal stem cells (MSCs) isolated from the anterior cruciate ligament (ACL) share multiple characteristics of bone marrow-derived mesenchymal stem cells (BMSCs), allowing their use for regenerative therapies. Injuries to the ACL can affect people of all ages. This study assesses whether the regenerative potential of ACL-derived MSCs (ACL-MSCs) from old donors is as high as the potential of ACL-MSCs from young donors. Materials and Methods: ACL-MSCs were isolated from ACL tissues obtained from young and old donors at the time of ACL reconstruction or arthroplasty...
September 1, 2018: Knee Surgery & related Research
Pinar Yilgor Huri, Seren Hamsici, Emre Ergene, Gazi Huri, Mahmut Nedim Doral
Infrapatellar fat pad is a densely vascularized and innervated extrasynovial tissue that fills the anterior knee compartment. It plays a role in knee biomechanics as well as constitutes a source of stem cells for regeneration after knee injury. Infrapatellar fat pad-derived stem cells (IPFP-ASCs) possess enhanced and age-independent differentiation capacity as compared to other stem cells, which makes them a very promising candidate in stem cell-based regenerative therapy. The aims of this review are to outline the latest advances and potential trends in using IPFP-ASCs and to emphasize the advantages over other sources of stem cells for applications in orthopedic surgery...
September 1, 2018: Knee Surgery & related Research
Seung Min Ryu, Han Seok Yang, Oog Jin Shon
Purpose: This study is to investigate clinical and radiological results of staged treatment using a temporary external fixator in bicondylar tibial plateau fractures (TPFs) and to evaluate correlation between prognostic factors and postoperative clinical outcomes. Materials and Methods: Twenty-four bicondylar TPF patients were selected. All patients were operated by a temporary external fixator first and then open reduction and internal fixation with dual plating...
September 1, 2018: Knee Surgery & related Research
Young-Joon Choi, Ki Won Lee, Jung-Ki Ha, Joo-Yul Bae, Suk Kyu Lee, Sang-Bum Kim, Dong-Kyo Seo
Purpose: The purpose was to evaluate and compare the revision rate due to aseptic loosening between a high-flex prosthesis and a conventional prosthesis. Materials and Methods: Two thousand seventy-eight knees (1,377 patients) with at least 2 years of follow-up after total knee arthroplasty were reviewed. Two types of implants were selected (LPS-Flex and LPS, Zimmer) to compare revision and survival rates and sites of loosened prosthesis component. Results: The revision rate of the LPS-Flex (4...
June 1, 2018: Knee Surgery & related Research
Anoop Jhurani, Piyush Agarwal, Mukesh Aswal, Purvi Saxena, Nidhi Singh
Purpose: Restoring the native patellar thickness after patellar resurfacing provides optimal function of the knee after arthroplasty and minimises complications related to the patellofemoral articulation. The aim of this study was to assess the usefulness of a thin patellar button (6.2 mm) in patients with a patella thickness of less than 20 mm during total knee arthroplasty. Materials and Methods: This is a retrospective case control study. A total of 54 female patients with an intraoperative patellar thickness of <20 mm, resurfaced with a patellar button of 6...
June 1, 2018: Knee Surgery & related Research
Wirinaree Kampitak, Aree Tanavalee, Srihatach Ngarmukos, Chavarin Amarase, Rawiwan Apihansakorn, Pannika Vorapalux
Purpose: We compared a single-injection adductor canal block (ACB) with or without local infiltration analgesia (LIA) for accelerating functional recovery and reducing postoperative pain after total knee arthroplasty (TKA). Materials and Methods: Sixty-two patients undergoing TKA with simple spinal analgesia and ACB were randomized to receive either LIA (group A+L) or placebo LIA (group A). Postoperative visual analog scale (VAS) score for pain, Timed Up and Go (TUG) test and quadriceps strength, total dosage of rescue analgesia, time to first rescue analgesia, and adverse events were serially evaluated from postoperative day 1 to 3 months...
June 1, 2018: Knee Surgery & related Research
You Keun Kim, Jae Doo Yoo, Sang Woo Kim, Sang Hoon Park, Joon Hee Cho, Hyung Mook Lim
Purpose: Little is known about the isometry of anatomic single-bundle anterior cruciate ligament (ACL) tunnel positions in vivo although it is closely related to graft tension throughout the range of motion. The purpose of this study was to evaluate intraoperative graft isometry in anatomic single-bundle ACL reconstruction in vivo . Materials and Methods: Graft length changes were assessed before bio-screw fixation in the tibial tunnel by pulling the graft with tensions of 20 lbs and 30 lbs in full extension at flexion angles of 30°, 60°, 90°, and 120°...
June 1, 2018: Knee Surgery & related Research
Yong Seuk Lee, Antonia F Chen
Two-stage reimplantation is considered the gold standard for the management of periprosthetic joint infection. The first stage involves the removal of the prosthesis, followed by extensive debridement of all nonviable tissues, synovectomy, irrigation, and reaming of the medullary canals. Once the joint has been prepared, antibiotic-impregnated cement beads and/or spacer are inserted. Antibiotic-impregnated spacers are now more commonly used, and an increasing number of orthopaedic surgeons are using articulating spacers if indicated...
June 1, 2018: Knee Surgery & related Research
Kun-Tae Kim, Hyun-Jung Kim, Hyang-Im Lee, Young-Jin Park, Dong-Geun Kang, Jun-Ill Yoo, Dong-Kyu Moon, Sung-Hee Cho, Sun-Chul Hwang
Purpose: Anterior cruciate ligament (ACL) injury is one of the most common injuries that occur in the knee, and ACL reconstruction (ACLR) is commonly performed for preventing aggravation of degenerative changes and restoring of knee stability in young, athletic patients. This meta-analysis has a purpose of evaluating the clinical and arthrometrical outcomes of ACLR in a group of middle age patients (40 years and older) and comparing with patients under 40 years of age. Methods: MEDLINE, EMBASE, the Cochrane Central Register of Controlled Trials, Web of Science, and SCOPUS electronic databases were searched for relevant articles comparing the outcomes of ACLR between younger and older than 40 years of age until December 2016...
June 1, 2018: Knee Surgery & related Research
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