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Partial knee replacement

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https://www.readbyqxmd.com/read/29138892/-partial-and-complete-joint-transplantation-with-fresh-osteochondral-allografts-the-flocsat-concept
#1
REVIEW
C Krettek, J-D Clausen, N Bruns, C Neunaber
Cartilage defects in adult patients do not heal well. Fresh osteochondral allograft (OCA) transplantation is based on mature, living, mechanically sound hyaline cartilage attached to a bone interface, which is brought into an osteochondral defect, where it becomes osseointegrated. According to current knowledge, intact hyaline cartilage tissue is immune privileged and does not, in contrast to bone, meniscus or ligaments, cause an immune reaction. The technique has the unique advantage of transplanting viable, mature and mechanically stable hyaline cartilage into the affected area...
November 14, 2017: Der Unfallchirurg
https://www.readbyqxmd.com/read/29119286/no-effect-of-topical-application-of-tranexamic-acid-on-articular-cartilage
#2
Luiz Felipe Ambra, Laura de Girolamo, Wanting Niu, Amy Phan, Myron Spector, Andreas H Gomoll
PURPOSE: The objective of this study was to evaluate potential cytotoxicity of TXA on articular cartilage by assessing chondrocyte viability of osteochondral explants after exposure to different concentrations and durations of TXA. METHODS: Thirty-nine osteochondral plugs (OCPs) were harvested from three adult Yucatan minipigs immediately after their death. OCPs were divided into 13 groups exposed to different concentrations of TXA (1, 2 and 4 mg/ml in saline solution) for 1, 3 and 6 h...
November 8, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29109026/a-low-friction-biphasic-and-boundary-lubricating-hydrogel-for-cartilage-replacement
#3
Piers E Milner, Maria Parkes, Jennifer L Puetzer, Robert Chapman, Molly M Stevens, Philippa Cann, Jonathan Jeffers
Partial joint repair is a surgical procedure where an artificial material is used to replace localised chondral damage. These artificial bearing surfaces must articulate against cartilage, but current materials do not replicate both the biphasic and boundary lubrication mechanisms of cartilage. A research challenge therefore exists to provide a material that mimics both boundary and biphasic lubrication mechanisms of cartilage. In this work a polymeric network of a biomimetic boundary lubricant, poly(2-methacryloyloxyethyl phosphorylcholine) (PMPC), was incorporated into an ultra-tough double network (DN) biphasic (water phase + polymer phase) gel, to form a PMPC triple network (PMPC TN) hydrogel with boundary and biphasic lubrication capability...
November 3, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28974402/up-to-10-year-follow-up-of-the-oxford-domed-lateral-partial-knee-replacement-from-an-independent-centre
#4
Simon D S Newman, Altay Altuntas, Helen Alsop, Justin P Cobb
BACKGROUND: The Oxford Domed Lateral Partial Knee Replacement (ODLPKR) was designed specifically for the lateral compartment in response to the unacceptable dislocation rate seen with the Oxford Partial Knee. This paper presents the up to 10-year follow-up of an independent, single surgeon series using this implant. The aim of this study is to assess the medium term outcome of the ODLPKR. The primary outcome measures were 13 revision surgery, re-operation and functional outcome. METHODS: Sixty-four knees in 58 patients were performed between 2005 and 2009...
September 30, 2017: Knee
https://www.readbyqxmd.com/read/28887704/-indication-and-limitations-of-meniscus-replacement
#5
REVIEW
C Stärke, S Kopf, R Becker
BACKGROUND: Meniscal lesions are among the most important musculoskeletal disorders and are the most common indication for knee joint arthroplasty. However, the structural integrity and function is rarely retained, and a loss of tissue results. Thus, there is a huge demand for meniscal replacement options. CURRENT PROCEDURES: Autografts were used in the past but did not fulfill expectations. Meniscus allografts have been developed to be a viable treatment option...
September 8, 2017: Der Orthopäde
https://www.readbyqxmd.com/read/28805136/the-ovine-model-for-meniscus-tissue-engineering-considerations-of-anatomy-function-implantation-and-evaluation
#6
Andrzej Brzezinski, Salim A Ghodbane, Jay M Patel, Barbara A Perry, Charles J Gatt, Michael G Dunn
Meniscus injuries represent one of the most-common intra-articular knee injuries. The current treatment options include meniscectomy and allograft transplantation, both with poor long-term outcomes. Therefore, there is a need for regenerative techniques to restore meniscal function. To preclinically test scaffolds for meniscus replacement, large animal models need to be established and standardized. This review establishes the anatomical and compositional similarities between human and sheep menisci and provides guidance for implantation and evaluation of such devices...
September 29, 2017: Tissue Engineering. Part C, Methods
https://www.readbyqxmd.com/read/28681269/a-retrospective-assessment-of-prognostication-in-456-685-patients-undergoing-elective-major-non-cardiac-surgery
#7
Daniel McIsaac, Luke T Lavallée, Carl van Walraven
BACKGROUND: The accuracy of patient prognostication varies extensively in studies of select populations. Prognostication is an important component of patient selection for elective surgery. This retrospective study assessed patient prognostication prior to elective surgery by comparing the observed with the expected number of deaths in such patients. STUDY DESIGN: We used population-based administrative data to identify all adults undergoing one of 13 most common elective major non-cardiac gender-neutral surgeries in Ontario, Canada from 2002-2014...
July 5, 2017: Canadian Journal of Anaesthesia, Journal Canadien D'anesthésie
https://www.readbyqxmd.com/read/28610776/two-stage-late-reconstruction-with-a-fresh-large-osteochondral-shell-allograft-transplantation-flocsat-for-a-large-ostechondral-defect-in-a-non-union-after-a-lateral-tibia-plateau-fracture-2-year-follow-up
#8
C Krettek, J Clausen, M Omar, S Noack, C Neunaber
This is the description of a 58-year-old female patient presenting 8 months after a horse riding accident with significant pain and inability to walk independently. Imaging revealed a large osseous defect of the lateral tibia plateau which was not united posteriorly. The patient refused knee replacement and we developed a patient specific two-step procedure for her. Step 1: Filling of the defect with a large cortico-cancellous autograft from the posterior iliac crest; step 2: Transplantation of a fresh large osteochondral shell allograft (FLOCSAT)...
July 2017: Injury
https://www.readbyqxmd.com/read/28609474/effects-of-perceptions-of-care-medical-advice-and-hospital-quality-on-patient-satisfaction-after-primary-total-knee-replacement-a-cross-sectional-study
#9
MULTICENTER STUDY
Tom Schaal, Tonio Schoenfelder, Joerg Klewer, Joachim Kugler
INTRODUCTION: The increase in the number of patients presenting with osteoarthritis in the past decade has led to a 32% increase in knee replacement surgeries designed to reduce restrictions on patient movement and improve their quality of life. Patient satisfaction is becoming an increasingly important indicator of quality of care. This study was designed to identify predictors of various service components in the treatment process and hospital key performance indicators significantly associated with patient satisfaction...
2017: PloS One
https://www.readbyqxmd.com/read/28577210/-distal-femoral-osteotomy-using-a-lateral-opening-wedge-technique
#10
M J Feucht, J Mehl, P Forkel, A B Imhoff, S Hinterwimmer
OBJECTIVE: To shift the weight-bearing axis of the lower limb medially by opening a lateral-based metaphyseal osteotomy at the distal femur. INDICATIONS: Femoral-based valgus malalignment and symptomatic lateral unicompartimental osteoarthritis, lateral hyperpression syndrome, cartilage therapy of the lateral compartment, lateral meniscal replacement/transplantation, medial instability with valgus thrust, reconstruction of the medial collateral ligament, patellar instability and/or maltracking...
August 2017: Operative Orthopädie und Traumatologie
https://www.readbyqxmd.com/read/28540495/linking-existing-instruments-to-develop-a-continuum-of-care-measure-accuracy-comparison-using-function-related-group-classification
#11
Chih-Ying Li, Sergio Romero, Kit N Simpson, Heather S Bonilha, Annie N Simpson, Ickpyo Hong, Craig A Velozo
PURPOSES: To compare measurement accuracy of test forms with varied number of items (13, 8, and 4 items) generated from the self-care physical function item bank composed of Functional Independence Measure (FIM™) and the Minimum Data Set (MDS). METHODS: Retrospective data analysis of 2499 Veterans who completed both FIM and MDS within 6 days. We compared measurement accuracy between the converted FIM (FIMc) motor score generated from the MDS and the original FIM (FIMa) motor score (13 items) at: (a) individual-level using point differences, and (b) group-level using function-related group (FRG)...
May 24, 2017: Quality of Life Research
https://www.readbyqxmd.com/read/28529858/hydrogen-peroxide-wound-irrigation-in-orthopaedic-surgery
#12
REVIEW
Min Lu, Erik Nathan Hansen
As the burden of deep hardware infections continues to rise in orthopaedics, there is increasing interest in strategies for more effective debridement of colonized tissues and biofilm. Hydrogen peroxide has been used medically for almost a century, but its applications in orthopaedic surgery have yet to be fully determined. The basic science and clinical research on the antiseptic efficacy of hydrogen peroxide have demonstrated its efficacy against bacteria, and it has demonstrated potential synergy with other irrigation solutions such as chlorhexidine and povidone-iodine...
2017: Journal of bone and joint infection
https://www.readbyqxmd.com/read/28378003/ultrasound-gel-minimizes-third-body-debris-with-partial-hardware-removal-in-joint-arthroplasty
#13
Aidan C McGrory, Lee Replogle, Donald Endrizzi
Hundreds of thousands of revision surgeries for hip, knee, and shoulder joint arthroplasties are now performed worldwide annually. Partial removal of hardware during some types of revision surgeries may create significant amounts of third body metal, polymer, or bone cement debris. Retained debris may lead to a variety of negative health effects including damage to the joint replacement. We describe a novel technique for the better containment and easier removal of third body debris during partial hardware removal...
March 2017: Arthroplasty Today
https://www.readbyqxmd.com/read/28375889/the-main-cause-of-death-following-primary-total-hip-and-knee-replacement-for-osteoarthritis-a-cohort-study-of-26-766-deaths-following-332-734-hip-replacements-and-29-802-deaths-following-384-291-knee-replacements
#14
Linda P Hunt, Yoav Ben-Shlomo, Michael R Whitehouse, Martyn L Porter, Ashley W Blom
BACKGROUND: Patients undergoing primary total joint replacement are selected for surgery and thus (other than having a transiently increased mortality rate postoperatively) have a lower mortality rate than age and sex-matched individuals do. Understanding the causes of death following joint replacement would allow targeted strategies to reduce the risk of death and optimize outcome. We aimed to determine the rates and causes of mortality for patients undergoing primary total hip or knee replacement compared with individuals in the general population who were matched for age and sex...
April 5, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28345407/knee-menisci
#15
James Kevin Bryceland, Andrew John Powell, Thomas Nunn
The menisci of the knees are semicircular fibrocartilaginous structures consisting of a hydrophilic extracellular matrix containing a network of collagen fibers, glycoproteins, and proteoglycans maintained by a cellular component. The menisci are responsible for more than 50% of load transmission across the knee and increase joint congruity thereby also aiding in fluid film lubrication of the joint. In the United Kingdom, meniscal tears are the most common form of intra-articular knee injury and one of the commonest indications for orthopedic intervention...
April 2017: Cartilage
https://www.readbyqxmd.com/read/28203596/intra-articular-implantation-of-mesenchymal-stem-cells-part-2-a-review-of-the-literature-for-meniscal-regeneration
#16
Matthew J Kraeutler, Justin J Mitchell, Jorge Chahla, Eric C McCarty, Cecilia Pascual-Garrido
Knee osteoarthritis (OA) after partial or total meniscectomy is a prevalent issue that patients must face. Various methods of replacing meniscal tissue have been studied to avoid this progression, including meniscal allograft transplantation, meniscal scaffolds, and synthetic meniscus replacement. Studies have shown that meniscal scaffolds may improve symptoms but have not been shown to prevent progression of OA. Recently, mesenchymal stem cells (MSCs) have been proposed as a possible biological therapy for meniscal regeneration...
January 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28160029/-partial-joint-replacement-of-the-knee-a-sophisticated-technique
#17
EDITORIAL
M Rudert, W Petersen
No abstract text is available yet for this article.
February 2017: Operative Orthopädie und Traumatologie
https://www.readbyqxmd.com/read/28148437/-therapeutic-approaches-to-gonarthrosis
#18
Jean-Noël Argenson, Sébastien Parratte, Matthieu Ollivier
Often linked to sequelae of a knee injury or knee deformities, gonarthrosis is the most frequent form of osteoarthritis of the limbs. A variety of methods and therapies can be used to treat it. For advanced conditions, treatment may involve partial or total replacement.
August 2016: Revue de L'infirmière
https://www.readbyqxmd.com/read/28144717/-individualized-unicondylar-knee-replacement-use-of-patient-specific-implants-and-instruments
#19
J Arnholdt, B M Holzapfel, L Sefrin, M Rudert, J Beckmann, A F Steinert
OBJECTIVE: Unicompartmental knee replacement in patients with osteoarthritis (OA) of the medial compartment. Individualized instruments and implants with a planning protocol for optimal fit. The individualized instruments and implants (ConforMIS Inc.; Burlington, MA, USA) are manufactured based on a computed tomography scan of the affected lower extremity and are provided together with a planning protocol (iView®) of the surgery. INDICATIONS: Unicompartmental OA of the knee (Kellgren & Lawrence stage IV) or Morbus Ahlbäck after unsuccessful conservative or joint preserving surgery...
February 2017: Operative Orthopädie und Traumatologie
https://www.readbyqxmd.com/read/28144716/bicompartmental-individualized-knee-replacement-use-of-patient-specific-implants-and-instruments-iduo%C3%A2
#20
A F Steinert, J Beckmann, B M Holzapfel, M Rudert, J Arnholdt
OBJECTIVE: Bicompartmental knee replacement in patients with combined osteoarthritis (OA) of the medial or lateral and patellofemoral compartment. Patient-specific instruments and implants (ConforMIS iDuo™) with a planning protocol for optimal implant fit. INDICATIONS: Bicompartmental OA of the knee (Kellgren & Lawrence stage IV) affecting both the medial or lateral and patellofemoral compartment after unsuccessful conservative or joint-preserving surgery. CONTRAINDICATIONS: Tricompartmental OA, knee ligament instabilities, knee deformities >15° (varus, valgus, extension deficit)...
February 2017: Operative Orthopädie und Traumatologie
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