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https://www.readbyqxmd.com/read/28635148/how-common-are-cranial-sesamoids-among-squamates
#1
Ricardo Montero, Juan D Daza, Aaron M Bauer, Virginia Abdala
Sesamoids are elements that originate as intratendinous structures due to genetic and epigenetic factors. These elements have been reported frequently in vertebrates, although cranial sesamoids have been recorded almost exclusively in non-tetrapod Osteichthyes. The only tetrapod cranial sesamoids reported until now have been the transiliens cartilage (of crocodiles and turtles), and another one located in the quadrate-mandibular joint of birds. Here, we examined seven squamate species using histological sections, dissections of preserved specimens, dry skeletons, cleared and stained specimens, computed tomographies (CT), and report the presence of other cranial sesamoids...
June 20, 2017: Journal of Morphology
https://www.readbyqxmd.com/read/28631143/post-operative-3d-ct-feedback-improves-accuracy-and-precision-in-the-learning-curve-of-anatomic-acl-femoral-tunnel-placement
#2
Luigi Sirleo, Massimo Innocenti, Matteo Innocenti, Roberto Civinini, Christian Carulli, Fabrizio Matassi
PURPOSE: To evaluate the feedback from post-operative three-dimensional computed tomography (3D-CT) on femoral tunnel placement in the learning process, to obtain an anatomic anterior cruciate ligament (ACL) reconstruction. METHODS: A series of 60 consecutive patients undergoing primary ACL reconstruction using autologous hamstrings single-bundle outside-in technique were prospectively included in the study. ACL reconstructions were performed by the same trainee-surgeon during his learning phase of anatomic ACL femoral tunnel placement...
June 19, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28630761/partial-proximal-tibia-fractures
#3
Michael J Raschke, Christoph Kittl, Christoph Domnick
Partial tibial plateau fractures may occur as a consequence of either valgus or varus trauma combined with a rotational and axial compression component.High-energy trauma may result in a more complex and multi-fragmented fracture pattern, which occurs predominantly in young people. Conversely, a low-energy mechanism may lead to a pure depression fracture in the older population with weaker bone density.Pre-operative classification of these fractures, by Müller AO, Schatzker or novel CT-based methods, helps to understand the fracture pattern and choose the surgical approach and treatment strategy in accordance with estimated bone mineral density and the individual history of each patient...
May 2017: EFORT open reviews
https://www.readbyqxmd.com/read/28629601/a-custom-made-temporomandibular-joint-prosthesis-for-fabrication-by-selective-laser-melting-finite-element-analysis
#4
Xiangliang Xu, Danmei Luo, Chuanbin Guo, Qiguo Rong
A novel and custom-made selective laser melting (SLM) 3D-printed alloplastic temporomandibular joint (TMJ) prosthesis is proposed. The titanium-6aluminium-4vanadium (Ti-6Al-4V) condyle component and ultra-high molecular weight polyethylene (UHMWPE) fossa component comprised the total alloplastic TMJ replacement prosthesis. For the condyle component, an optimized tetrahedral open-porous scaffold with combined connection structures, i.e. an inlay rod and an onlay plate, between the prosthesis and remaining mandible was designed...
June 16, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28629234/healing-of-osteochondral-defects-via-endochondral-ossification-in-an-ovine-model
#5
Helen Lydon, Alan Getgood, Frances M D Henson
OBJECTIVE: The objective of this study was to describe the mechanism of healing of osteochondral defects of the distal femur in the sheep, a commonly used translational model. Information on the healing mechanism be useful to inform the design of tissue engineering devices for joint surface defect repair. DESIGN: A retrospective study was conducted examining 7-mm diameter osteochondral defects made in the distal medial femoral condyle of 40 adult female sheep, comprising control animals from 3 separate structures...
June 1, 2017: Cartilage
https://www.readbyqxmd.com/read/28628579/distal-humeral-flexion-osteotomy-for-the-treatment-of-supracondylar-extension-type-malunions-in-children
#6
Sebastian Farr, Rudolf Ganger, Werner Girsch
Distal humeral extension-type malunions may occur as a complication following improper reduction of supracondylar humerus fractures. We evaluated results after distal humeral flexion osteotomies for sagittal realignment of the humeral condyle in children. Medical records and radiographs of all patients younger than 18 years of age, who underwent this procedure because of a clinically relevant lack of elbow flexion, were evaluated. In a cohort of 18 children with a mean age of 8 years at the time of surgery and a mean follow-up duration of 1 year, elbow flexion increased significantly from a mean of 101° preoperatively to 126° at the final follow-up; established radiographic parameters (e...
June 16, 2017: Journal of Pediatric Orthopedics. Part B
https://www.readbyqxmd.com/read/28627358/long-term-changes-in-bone-height-after-mandibular-reconstruction-using-a-free-fibula-graft-in-an-elderly-population
#7
Kosuke Ishikawa, Yuhei Yamamoto, Hiroshi Furukawa, Yoichi Ohiro, Akira Satoh, Toshihiko Hayashi
PURPOSE: This study evaluated short-term and long-term changes in bone height after mandibular reconstruction using an osteotomized fibula graft, with the aim of identifying factors associated with atrophy of the graft in an elderly population. PATIENTS AND METHODS: This retrospective study involved patients who underwent mandibular reconstruction using a free vascularized fibula graft from 2005 through 2015 and had at least 12 months of follow-up. Postoperative panoramic radiographs were used to measure bone height at standardized locations on each segment of the graft at 1 year postoperatively and at later follow-up...
May 24, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28624013/femoral-torsion-assessment-with-mri-in-children-should-we-use-the-bony-or-cartilaginous-contours
#8
Andrea B Rosskopf, Christoph A Agten, Leonhard E Ramseier, Christian W A Pfirrmann, Florian M Buck
OBJECTIVE: To assess whether the use of cartilaginous contours at the femoral condyles instead of bony contours significantly changes femoral torsion measurements in children. MATERIALS AND METHODS: Femoral torsion was measured in 32 girls (mean age 10.1 years±2.3 standard deviation) and 42 boys (10.9 years±2.5) on axial magnetic resonance (MR) images by two independent readers (R1,R2). The femoral condyle angle was measured using each the cartilaginous and bony contours of the distal femur...
July 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28623683/the-effects-of-unilateral-alloplastic-temporomandibular-joint-replacement-on-the-opposite-side-natural-joint-a-finite-element-analysis
#9
Burak Bekcioglu, Emel Bulut, Burcu Baş
PURPOSE: The purpose of this study was to evaluate the stress distribution on the temporomandibular joint (TMJ) prosthesis and contralateral natural TMJ with finite-element analysis. MATERIALS AND METHODS: A TMJ implant was used to create a 3-dimensional model with a computer. This model was integrated with a mandible model created with a computer by use of computed tomography images, similar to a real TMJ replacement procedure. Masticatory loads were applied to the model...
May 24, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28623415/a-stand-alone-lateral-condyle-elevating-trochlear-osteotomy-leads-to-high-residual-instability-but-no-excessive-increase-in-patellofemoral-osteoarthritis-at-12-year-follow-up
#10
S Tigchelaar, J van Sambeeck, S Koeter, A van Kampen
PURPOSE AND HYPOTHESIS: Trochlear osteotomy is a rarely performed procedure, only indicated in selected cases. Due to its nature, it can potentially lead to cartilage damage and subsequent early osteoarthritis. Satisfactory short-term results from lateral condyle-elevating osteotomy have previously been reported. The long-term effects of this procedure on clinical outcomes, patellar stability and radiological osteoarthritis are reported here. METHODS: Sixteen patients (19 knees) with patellar instability due to trochlear dysplasia were included...
June 16, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28621323/a-robust-methodology-for-the-quantitative-assessment-of-the-rat-jawbone-microstructure
#11
Marissa Chatterjee, Fernanda Faot, Cassia Correa, Joke Duyck, Ignace Naert, Katleen Vandamme
Micro-computed tomography can be applied for the assessment of the micro-architectural characteristics of the cortical and trabecular bones in either physiological or disease conditions. However, reports often lack a detailed description of the methodological steps used to analyse these images, such as the volumes of interest, the algorithms used for image filtration, the approach used for image segmentation, and the bone parameters quantified, thereby making it difficult to compare or reproduce the studies...
June 16, 2017: International Journal of Oral Science
https://www.readbyqxmd.com/read/28620229/novel-bioactive-glass-based-injectable-bone-cement-with-improved-osteoinductivity-and-its-in-vivo-evaluation
#12
Tengjiao Zhu, Huihui Ren, Ailing Li, Bingchuan Liu, Caiyun Cui, Yanmei Dong, Yun Tian, Dong Qiu
Recently, more and more attention has been paid to the development of a new generation of injectable bone cements that are bioactive, biodegradable and are able to have appropriate mechanical properties for treatment of vertebral compression fractures (VCFs). In this study, a novel PSC/CS composite cement with high content of PSC (a phytic acid-derived bioactive glass) was prepared and evaluated in both vitro and vivo. The PSC/CS cement showed excellent injectability, good resistance to disintegration, radiopacity and suitable mechanical properties...
June 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28619022/effect-of-low-magnitude-different-frequency-whole-body-vibration-on-subchondral-trabecular-bone-microarchitecture-cartilage-degradation-bone-cartilage-turnover-and-joint-pain-in-rabbits-with-knee-osteoarthritis
#13
Wang Junbo, Liu Sijia, Chen Hongying, Liu Lei, Wang Pu
BACKGROUD: Whole-body vibration(WBV) has been suggested for the prevention of subchondral bone loss of knee osteoarthritis (OA) . This study examined the effects of different frequency of whole-body vibration on subchondral trabecular bone microarchitecture, cartilage degradation and metabolism of the tibia and femoral condyle bone, and joint pain in an anterior cruciate ligament transection (ACLT)-induced knee osteoarthritisrabbit model. METHOD: Ninety adult rabbits were divided into six groups: all groups received unilateral ACLT; Group 1, ACLT only; Group 2, 5 Hz WBV; Group 3, 10 Hz WBV; Group 4, 20 Hz WBV; Group 5, 30 Hz WBV; and Group 6, 40 Hz WBV...
June 15, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28616392/catastrophic-complication-following-injection-and-extracorporeal-shock-wave-therapy-of-a-medial-femoral-condyle-subchondral-cystic-lesion-in-a-14-year-old-arabian-mare
#14
Darla K Moser, Mike J Schoonover, Kate M Sippel, Alix M Dieterly, Jerry W Ritchey, Corey R Wall
This report describes fibrous cyst lining injection and extracorporeal shock wave therapy (ESWT) of a medial femoral condyle (MFC) subchondral cystic lesion (SCL) resulting in catastrophic MFC fracture in an Arabian mare. The mare was presented for evaluation of a severe hind limb lameness of approximately 4 months duration. On presentation, a non-weight bearing lameness of the left hind limb with severe effusion and soft tissue swelling of the stifle region was noted. Radiographic evaluation of the stifle revealed a large SCL of the MFC with associated osteoarthritis...
2017: Open veterinary journal
https://www.readbyqxmd.com/read/28611327/overgrowth-of-costochondral-graft-in-temporomandibular-joint-ankylosis-reconstruction-a-retrospective-study
#15
S M Balaji, Preetha Balaji
BACKGROUND: Temporomandibular joint (TMJ) ankylosis is a situation in which the mandibular condyle is fused to the glenoid fossa by bone or fibrous tissue. The management of TMJ ankylosis has a complicated chore, and it is challenging for the maxillofacial surgeon because of technical hitches and high rate of reankylosis. Costochondral graft (CCG) is a common treatment modality for TMJ ankylosis. One of disadvantages of CCG is unpredictability of growth pattern and risk of overgrowth...
March 2017: Indian Journal of Dental Research: Official Publication of Indian Society for Dental Research
https://www.readbyqxmd.com/read/28610821/superolateral-dislocation-of-the-intact-mandibular-condyle-report-of-a-rare-case-with-a-review
#16
N Srinath, D N Umashankar, C Naik, J Biradar
Dislocation of the temporomandibular joint, which represents 3% of all dislocated joints reported in the body, occurs when the mandibular condyle is displaced anteriorly beyond the articular eminence. Although anterior dislocation of the mandibular condyle is well documented in the literature, superior, lateral, and posterior dislocation of the condyle is rare. Only a few reports documenting superolateral dislocation with anterior mandible fractures have been published in the past. However such dislocations without any associated fractures are even rarer...
June 10, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28608754/a-preliminary-study-comparing-microfracture-and-local-adherent-transplantation-of-autologous-adipose-derived-stem-cells-followed-by-intraarticular-injection-of-platelet-rich-plasma-for-the-treatment-of-chondral-defects-in-rabbits
#17
Timea Spakova, Judita Amrichova, Jana Plsikova, Denisa Harvanova, Slavomir Hornak, Valent Ledecky, Jan Rosocha
Objective This study aimed to compare microfracture and application of adipose-derived stem cells (ADSCs) by local adherent technique enhanced by platelet-rich plasma (PRP) to provide a new approach for the repair of cartilage defect. Design Full-thickness cylindrical defects were created in the medial femoral condyle in 9 New Zealand White rabbits (5 months old, 4.65 ± 0.20 kg). Two groups of rabbits ( n = 3) were either treated with ADSCs (Group 1) or the microfracture technique (Group 2) following intraarticular injection of PRP 3 times in weekly intervals...
June 1, 2017: Cartilage
https://www.readbyqxmd.com/read/28607469/pth-1-34-induced-differentiation-and-mineralization-of-mandibular-condylar-cartilage
#18
Mara Heather O' Brien, Eliane Hermes Dutra, Alexandro Lima, Ravindra Nanda, Sumit Yadav
Intermittent Parathyroid Hormone (I-PTH) is the only FDA approved anabolic drug therapy available for the treatment of osteoporosis in males and postmenopausal females. The effects of I-PTH on the chondrogenic lineage of the mandibular condylar cartilage (MCC) are not well understood. To investigate the role of I-PTH on the MCC and subchondral bone, we carried out our studies using 4 to 5 week old triple transgenic mice (Col1a1XCol2a1XCol10a1). The experimental group was injected with PTH (80 μg/kg) daily for 2 weeks, while control group was injected with saline...
June 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28604551/the-periosteal-medial-femoral-condyle-free-flap-a-new-option-for-soft-tissue-reconstruction-of-the-distal-lower-extremity
#19
Noah H Saad, Matthew E Pontell, Brian S Winters, Joseph Daniel, Adam Saad
BACKGROUND: Small (<30 cm) soft tissue defects of the distal leg, foot, and ankle pose a complicated issue with regard to wound healing. Multiple flaps have been proposed for reconstruction of these wounds with varying levels of success. The medial femoral condyle flap is a free bone flap supplied by the descending geniculate artery. It is currently used in the treatment of fracture nonunion, infected bone defects, avascular necrosis, and osteoradionecrosis. This study proposes the use of the periosteal portion of the medial femoral condyle (PMFC) flap for soft tissue reconstruction of the distal leg, foot, and ankle...
June 9, 2017: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/28602259/assessment-of-condyle-position-fossa-morphology-and-disk-displacement-in-symptomatic-patients
#20
Katharina Alves Rabelo, Saulo Leonardo Sousa Melo, Marianna Guanaes Gomes Torres, Larissa Rangel Peixoto, Paulo Sérgio Flores Campos, Iêda Margarida Crusoé Rocha Rebello, Daniela Pita de Melo
OBJECTIVE: The aim of the study was to determine whether there are any associations between the morphology of the glenoid fossa, articular spaces, and disk displacement by evaluating the magnetic resonance imaging (MRI) scans of symptomatic patients. Gender and age were also evaluated for any effect on the parameters. STUDY DESIGN: MRI scans of 199 temporomandibular joints were assessed for the morphology of the glenoid fossa and articular spaces in both sagittal and coronal views...
April 19, 2017: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
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