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https://www.readbyqxmd.com/read/29773499/study-of-condylar-positional-changes-after-sagittal-split-osteotomy-for-mandibular-advancement-a-prospective-cohort-study
#1
Alberto Costas, Jacinto F Sanromán, Pilar Castro, Martín F Ferro, Annahys Lopez, Bogdan Stavaru
PURPOSE: To analyse the possible morphologic and positional changes of the mandibular condyles after orthognathic surgery. MATERIAL AND METHODS: A prospective cohort study was performed. Patients with mandibular retrognathism were surgically treated to advance the mandible. The study group included seventeen patients (34 condyles) treated with sagittal split osteotomies alone (4 patients) or in combination with maxillary osteotomies (13 patients). Only condyles located on the mandibular side that advance during surgery were studied, therefore only 25 condyles entered this prospective study...
April 22, 2018: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/29773278/medial-tibial-periprosthetic-bone-resorption-and-its-effect-on-clinical-outcomes-after-total-knee-arthroplasty-cobalt-chromium-vs-titanium-implants
#2
Chan Yoon, Moon Jong Chang, Chong Bum Chang, Min Kyu Song, Jae Hoon Shin, Seung-Baik Kang
BACKGROUND: Recently, concerns arose over the medial tibial bone resorption of a novel cobalt-chromium implant. This study aimed at investigating the effects of tibial component material, design, and patient factors on periprosthetic bone resorption and at determining its association with clinical outcomes after total knee arthroplasty (TKA). METHODS: A total of 462 primary TKAs using 5 types of implants were included. To evaluate tibial periprosthetic bone resorption, we assessed radiolucent lines and change in bone mineral density at the medial tibial condyle (BMDMT )...
April 23, 2018: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29772032/prevalence-of-abnormal-morphology-of-the-temporomandibular-joint-in-asymptomatic-subjects-a-retrospective-cohort-study-utilizing-cone-beam-computed-tomography
#3
Thiago Azário de Holanda, Rita Cássia de Almeida, Alexandre Emídio Silva, Melissa Feres Damian, Noéli Boscato
PURPOSE: This retrospective cohort study in an asymptomatic nonpatient population evaluated the prevalence of specific morphologic changes usually associated with the presence of degenerative joint diseases (DJD) using cone beam computed tomography (CBCT) and examined the associations between DJD and age, sex, and number of teeth present. MATERIALS AND METHODS: CBCT images (268 TMJs) of 134 asymptomatic patients were studied. Patient data were obtained from clinical records, and calibrated examiners interpreted the CBCT images...
May 17, 2018: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29769051/knee-dgemric-at-7-t-comparison-against-1-5-t-and-evaluation-of-t-1-mapping-methods
#4
Pernilla Peterson, Carl Johan Tiderius, Emma Olsson, Björn Lundin, Lars E Olsson, Jonas Svensson
BACKGROUND: dGEMRIC (delayed Gadolinium Enhanced Magnetic Resonance Image of Cartilage) is a well-established technique for cartilage quality assessment in osteoarthritis at clinical field strengths. The method is robust, but requires injection of contrast agent and a cumbersome examination procedure. New non-contrast-agent-based techniques for cartilage quality assessment are currently being developed at 7 T. However, dGEMRIC remains an important reference technique during this development...
May 16, 2018: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29766258/treatment-of-osteochondral-defects-with-a-combination-of-bone-grafting-and-amic-technique
#5
Arnd Hoburg, Julia Marcella Leitsch, Gerd Diederichs, Rex Lehnigk, Carsten Perka, Roland Becker, Sven Scheffler
INTRODUCTION: Osteochondral defects of the knee may cause functional impairment of young and sportively active patients. Different surgical treatment options have been proposed using either one or two step procedures. The aim of the current study was to evaluate mid-term outcomes of combined bone grafting with autologous matrix-associated chondrogenesis (AMIC) for the treatment of large osteochondral defects. MATERIALS AND METHODS: 15 Patients with osteochondrosis dissecans of the medial femoral condyle grade III or IV according to ICRS classification were treated with a single step surgical procedure combining bone grafting and the AMIC procedure...
May 15, 2018: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/29765410/comparison-of-regenerative-tissue-quality-following-matrix-associated-cell-implantation-using-amplified-chondrocytes-compared-to-synovium-derived-stem-cells-in-a-rabbit-model-for-cartilage-lesions
#6
Hagen Schmal, Justyna M Kowal, Moustapha Kassem, Michael Seidenstuecker, Anke Bernstein, Katharina Böttiger, Tanshiyue Xiong, Norbert P Südkamp, Eva J Kubosch
Known problems of the autologous chondrocyte implantation motivate the search for cellular alternatives. The aim of the study was to test the potential of synovium-derived stem cells (SMSC) to regenerate cartilage using a matrix-associated implantation. In an osteochondral defect model of the medial femoral condyle in a rabbit, a collagen membrane was seeded with either culture-expanded allogenic chondrocytes or SMSC and then transplanted into the lesion. A tailored piece synovium served as a control. Rabbit SMSC formed typical cartilage in vitro...
2018: Stem Cells International
https://www.readbyqxmd.com/read/29763348/histological-alterations-from-condyle-repositioning-with-functional-appliances-in-rats
#7
Michiko Nakatsuka, Shunji Kumabe
OBJECTIVE: This study was designed to assess the morphological and histological alterations of the condyle of rats undergoing forward mandibular repositioning via functional appliance. MATERIALS AND METHODS: Functional appliances were mounted onto the upper jaws of rats. Morphological analysis was conducted on micro-CT images of sacrificed animals. Histological changes in condyle were examined by immunohistochemistry using proliferating cell nuclear antigen (PCNA), matrix metalloproteases (MMPs), vascular endothelial growth factor (VEGF), tissue inhibitors of matrix metalloproteinases (TIMP-1), interleukin 1b (IL-1β), Aggrecan and Type II collagen...
May 15, 2018: Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/29763346/mandibular-condylar-aplasia-treated-with-a-functional-appliance-a-five-years-follow-up
#8
Mejia-Gomez Carlos Mauricio, Ramirez-Yanez German Omar
This report presents a follow up of a clinical case published five years ago by the same authors. In the previous report, the authors showed a young girl treated with a myofunctional appliance due to a mandibular condylar agenesia. After a traditional graft had failed, the patient successfully responded to the functional treatment by forming a mandibular condyle. In this new report, the authors are showing how the mandibular condyle has continued developing within normal limits and, the mandibular ramus has continued positively remodeling...
May 15, 2018: Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/29762296/a-novel-anatomic-risk-factor-for-anterior-cruciate-ligament-injury-commentary-on-an-article-by-thomas-r-pfeiffer-md-et-al-an-increased-lateral-femoral-condyle-ratio-is-a-risk-factor-for-anterior-cruciate-ligament-injury
#9
https://www.readbyqxmd.com/read/29762281/an-increased-lateral-femoral-condyle-ratio-is-a-risk-factor-for-anterior-cruciate-ligament-injury
#10
Thomas R Pfeiffer, Jeremy M Burnham, Jonathan D Hughes, Ajay C Kanakamedala, Elmar Herbst, Adam Popchak, Sven Shafizadeh, James J Irrgang, Richard E Debski, Volker Musahl
BACKGROUND: The purpose of this study was to examine the relationship between distal femoral morphology and anterior cruciate ligament (ACL) injury, ACL reconstruction (ACLR) failure, and contralateral ACL injury. It was hypothesized that increased posterior femoral condylar depth, quantified as the lateral femoral condyle ratio, would correlate with increased risk of primary ACL injuries, ACLR failures, and contralateral ACL injuries. METHODS: The charts of consecutive patients who underwent arthroscopic knee surgery at an academic medical center from 2012 to 2016 with minimum follow-up of 24 months were retrospectively reviewed...
May 16, 2018: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/29762089/juvenile-osteochondritis-dissecans-cartilage-t2-mapping-of-stable-medial-femoral-condyle-lesions
#11
Jie C Nguyen, Fang Liu, Donna G Blankenbaker, Kaitlin M Woo, Richard Kijowski
Purpose To determine whether a T2 mapping sequence could depict early changes in the composition and microstructure of cartilage overlying stable lesions of the medial femoral condyle in patients with juvenile osteochondritis dissecans (JOCD). Materials and Methods This retrospective study analyzed a sagittal T2 mapping sequence performed between September 1, 2015, and March 31, 2017, on 16 patients (10 boys and six girls; median age, 11.5 years) with 18 stable medial femoral condyle JOCD lesions and 18 age-, sex-, and skeletal maturation-matched control participants (11 boys and seven girls; median age, 11...
May 15, 2018: Radiology
https://www.readbyqxmd.com/read/29753964/a-web-based-system-for-neural-network-based-classification-in-temporomandibular-joint-osteoarthritis
#12
Priscille de Dumast, Clément Mirabel, Lucia Cevidanes, Antonio Ruellas, Marilia Yatabe, Marcos Ioshida, Nina Tubau Ribera, Loic Michoud, Liliane Gomes, Chao Huang, Hongtu Zhu, Luciana Muniz, Brandon Shoukri, Beatriz Paniagua, Martin Styner, Steve Pieper, Francois Budin, Jean-Baptiste Vimort, Laura Pascal, Juan Carlos Prieto
OBJECTIVE: The purpose of this study is to describe the methodological innovations of a web-based system for storage, integration and computation of biomedical data, using a training imaging dataset to remotely compute a deep neural network classifier of temporomandibular joint osteoarthritis (TMJOA). METHODS: This study imaging dataset consisted of three-dimensional (3D) surface meshes of mandibular condyles constructed from cone beam computed tomography (CBCT) scans...
May 1, 2018: Computerized Medical Imaging and Graphics: the Official Journal of the Computerized Medical Imaging Society
https://www.readbyqxmd.com/read/29748965/subchondroplasty-for-the-treatment-of-post-traumatic-bone-marrow-lesions-of-the-medial-femoral-condyle-in-a-pre-clinical-canine-model
#13
Olubusola A Brimmo, Chantelle C Bozynski, Cristi R Cook, Keiichi Kuroki, Seth L Sherman, Ferris M Pfeiffer, Aaron M Stoker, James L Cook
This study characterizes long-term outcomes associated with subchondroplasty (SCP) treatment for impact-induced subchondral bone marrow lesions (BML) using a validated pre-clinical canine model. With IACUC approval, purpose-bred research hounds (n = 16) underwent arthroscopic impact injury (40N) to both medial femoral condyles. At 3 months, functional assessments, arthroscopy and MRI were performed and knees (n = 32) were randomly assigned to SCP (3 mL fluoroscopically guided percutaneous injection of AccuFill BSM into BML bone defects) or sham injection (Control)...
May 10, 2018: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29748692/clinics-in-diagnostic-imaging-185
#14
Ying Xin Candice Leong, Poh Lye Paul See
A 20-year-old National Serviceman presented with left knee pain and swelling after training for his physical fitness test. Lateral knee radiography and magnetic resonance (MR) imaging showed patellar tendon-lateral femoral condyle friction syndrome (PT-LFCFS), on a background of patella alta and patellar malalignment. The patient was treated non-operatively with a course of physiotherapy and given advice on rest and activity modification. PT-LFCFS is a less well-recognised but important cause of anterior knee pain and represents an entity in a spectrum of disorders related to patellofemoral instability...
April 2018: Singapore Medical Journal
https://www.readbyqxmd.com/read/29746554/effects-of-collagen-matrix-and-bioreactor-cultivation-on-cartilage-regeneration-of-a-full-thickness-critical-size-knee-joint-cartilage-defects-with-subchondral-bone-damage-in-a-rabbit-model
#15
Kuo-Hwa Wang, Richard Wan, Li-Hsuan Chiu, Yu-Hui Tsai, Chia-Lang Fang, John F Bowley, Kuan-Chou Chen, Hsin-Nung Shih, Wen-Fu Thomas Lai
Cartilage has limited self-repair ability. The purpose of this study was to investigate the effects of different species of collagen-engineered neocartilage for the treatment of critical-size defects in the articular joint in a rabbit model. Type II and I collagen obtained from rabbits and rats was mixed to form a scaffold. The type II/I collagen scaffold was then mixed with rabbit chondrocytes to biofabricate neocartilage constructs using a rotating cell culture system [three-dimensional (3D)-bioreactor]. The rabbit chondrocytes were mixed with rabbit collagen scaffold and rat collagen scaffold to form neoRBT (neo-rabbit cartilage) and neoRAT (neo-rat cartilage) constructs, respectively...
2018: PloS One
https://www.readbyqxmd.com/read/29744446/an-in-vivo-study-on-the-effect-of-coating-stability-on-osteointegration-performance-of-collagen-hyaluronic-acid-multilayer-modified-titanium-implants
#16
Haiyong Ao, Jiajia Zong, Yanjiao Nie, Yizao Wan, Xiebin Zheng
Aseptic loosening of implant is one of the main causes of Ti-based implant failure. In our previous work, a novel stable collagen/hyaluronic acid (Col/HA) multilayer modified titanium coatings (TCs) was developed by layer-by-layer (LBL) covalent immobilization technique, which showed enhanced biological properties compared with TCs that were physically absorbed with Col/HA multilayer in vitro . In this study, a rabbit model with femur condyle defect was employed to compare the osteointegration performance of them...
March 2018: Bioactive Materials
https://www.readbyqxmd.com/read/29741957/effects-of-proud-large-osteochondral-plugs-on-contact-forces-and-knee-kinematics-a-robotic-study
#17
Peter Z Du, Keith L Markolf, Daniel V Boguszewski, Kent T Yamaguchi, Christopher J Lama, David R McAllister, Kristofer J Jones
BACKGROUND: Osteochondral allograft (OCA) transplantation is used to treat large focal femoral condylar articular cartilage defects. A proud plug could affect graft survival by altering contact forces (CFs) and knee kinematics. HYPOTHESIS: A proud OCA plug will significantly increase CF and significantly alter knee kinematics throughout controlled knee flexion. STUDY DESIGN: Controlled laboratory study. METHODS: Human cadaver knees had miniature load cells, each with a 20-mm-diameter cylinder of native bone/cartilage attached at its exact anatomic position, installed in both femoral condyles at standardized locations representative of clinical defects...
May 1, 2018: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29739631/morphological-patterns-of-anterior-femoral-condylar-resection-in-kinematically-and-mechanically-aligned-total-knee-arthroplasty
#18
Jung-Taek Kim, Jun Han, Quan Hu Shen, Sung Won Moon, Ye-Yeon Won
BACKGROUND: "Grand-piano sign" has been used as a popular benchmark to facilitate correct rotational alignment during total knee arthroplasty (TKA). The purpose was to quantitatively determine morphological patterns on anterior femoral resection in mechanically aligned (MA) and kinematically aligned (KA) TKA. METHODS: Computed tomography scans of 60 TKA candidates were reconstructed into 3D models. Femurs were virtually cut with a 3D imaging program using various anterior flange flexion angles (AFFAs) of 3°, 5°, and 7°...
April 9, 2018: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29735385/does-lag-screw-fixation-of-condylar-fractures-result-in-adequate-stability-a-finite-element-analysis
#19
Ricardo Augusto Conci, Eleonor Álvaro Garbin, Geraldo Luiz Griza, Natasha Magro Érnica, Pedro Yoshito Noritomi, Flavio Henrique Silveira Tomazi, Guilherme Genehr Fritscher, Claiton Heitz
The great incidence and controversies related to the diagnosis, treatment, surgical accesses, and type of osteosynthesis materials confer an outstanding role to condylar fractures among facial fractures. Plate configurations, with diverse formats and sizes, may be used to surgically resolve condylar fractures. With the purpose of improving the advantages and minimizing the disadvantages of fixation techniques, the neck screw was developed aiming at the needed stabilization to render a correct fixation through a system of dynamic compression...
April 11, 2018: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/29735291/chimeric-medial-femoral-condyle-osteocutaneous-flap-for-reconstruction-of-multiple-metacarpal-defects
#20
REVIEW
Chung-Chen Hsu, James Tseng, Yu-Te Lin
When faced with reconstructing metacarpal defects, various options have been described. We describe a chimeric medial femoral condyle osteocutaneous flap as a new method for providing multiple bone grafts as well as soft tissue coverage in a single stage. The medial femoral condyle has become an area of increased interest given the versatility it allows in harvesting the bone. This osteocutaneous flap is useful when reconstructing small- to medium-sized adjacent metacarpal bone defects. The chimeric design of the flap lends flexibility at the time of inset that is absent for other options of vascularized bone grafts...
May 5, 2018: Journal of Hand Surgery
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