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https://www.readbyqxmd.com/read/28209278/the-impact-of-coronal-plane-alignment-on-polyethylene-wear-and-damage-in-total-knee-arthroplasty-a-retrieval-study
#1
Pieter-Jan T K Vandekerckhove, Matthew G Teeter, Douglas D R Naudie, James L Howard, Steven J MacDonald, Brent A Lanting
BACKGROUND: Coronal plane alignment is one of the contributing factors to polyethylene wear in total knee arthroplasty. METHODS: Based on 95 retrieved polyethylene inserts, wear and damage patterns were analyzed in relationship to the overall mechanical alignment and to the position of the tibial component. RESULTS: A progression of wear was observed with progressively mechanical varus alignment. However, there was significantly more damage in the lateral compartment in the mild and moderate varus group compared to the valgus group...
January 4, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28209275/contact-kinematic-differences-between-gap-balanced-vs-measured-resection-techniques-for-single-radius-posterior-stabilized-total-knee-arthroplasty
#2
Matthew G Teeter, Kevin I Perry, Xunhua Yuan, James L Howard, Brent A Lanting
BACKGROUND: Measured resection (MR) and gap balancing (GB) are common surgical techniques for total knee arthroplasty (TKA). Controversy has arisen as each conceptually differs in how the knee is balanced through bone and soft tissue management. The objective of the present study was to compare both the frequency of condylar liftoff and the location of femorotibial contact from extension through midflexion between patients undergoing GB or MR TKA. METHODS: A total of 24 knees (23 patients) were randomly assigned at referral to either a surgeon performing MR or GB TKA with the same single radius, posterior-stabilized implant (12 per cohort)...
January 11, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28209274/long-term-durability-of-ceramic-tri-condylar-knee-implants-a-minimum-15-year-follow-up
#3
Shinichiro Nakamura, Hiromu Ito, Kenji Nakamura, Shinichi Kuriyama, Moritoshi Furu, Shuichi Matsuda
BACKGROUND: Ceramic bearings are not commonly used in total knee arthroplasty (TKA). So far, little information is available about whether long-term survivorship and good clinical outcomes can be ensured with ceramic knee implants. The purposes of the present study were to evaluate the clinical and radiological outcomes, and to assess the long-term durability of a ceramic tri-condylar implant. METHODS: A total of 507 consecutive TKAs were carried out using a ceramic tri-condylar femoral implant...
January 20, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28199931/a-personalized-3d-printed-prosthetic-joint-replacement-for-the-human-temporomandibular-joint-from-implant-design-to-implantation
#4
David C Ackland, Dale Robinson, Michael Redhead, Peter Vee Sin Lee, Adrian Moskaljuk, George Dimitroulis
Personalized prosthetic joint replacements have important applications in cases of complex bone and joint conditions where the shape and size of off-the-shelf components may not be adequate. The objective of this study was to design, test and fabricate a personalized 3D-printed prosthesis for a patient requiring total joint replacement surgery of the temporomandibular joint (TMJ). The new 'Melbourne' prosthetic TMJ design featured a condylar component sized specifically to the patient and fixation screw positions that avoid potential intra-operative damage to the mandibular nerve...
February 6, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28198654/morphological-changes-in-the-temporomandibular-joint-after-orthodontic-treatment-for-angle-class-ii-malocclusion
#5
Daigo Koide, Kazuhiro Yamada, Ayane Yamaguchi, Toru Kageyama, Akira Taguchi
OBJECTIVE: The aim of this study was to examine the morphological temporomandibular joint (TMJ) changes that occur after orthodontic treatment in patients with Angle Class II malocclusion. METHODS: The post-treatment changes in TMJ morphology were analyzed, based on TMJ cephalometric laminographs in 19 patients with Angle Class II malocclusion and labial inclination of the upper incisors after premolar extraction. RESULTS: The condylar pass angle, articular eminence to the Frankfort horizontal plane angle, and total, upper, and lower heights of the articular fossa increased significantly on both sides after treatment and retention...
February 15, 2017: Cranio: the Journal of Craniomandibular Practice
https://www.readbyqxmd.com/read/28194343/the-effect-of-a-condylar-repositioning-plate-on-condylar-position-and-relapse-in-two-jaw-surgery
#6
Gyu Sik Jung, Taek Kyun Kim, Jeong Woo Lee, Jung Dug Yang, Ho Yun Chung, Byung Chae Cho, Kang Young Choi
BACKGROUND: Numerous condylar repositioning methods have been reported. However, most of them are 2-dimensional or are complex procedures that require a longer operation time and a highly trained surgeon. This study aims to introduce a new technique using a condylar repositioning plate and a centric relation splint to achieve a centric relationship. METHODS: We evaluated 387 patients who had undergone surgery for skeletal jaw deformities. During the operation, a centric relation splint, intermediate splint, final centric occlusion splint, and condylar repositioning plate along with an L-type mini-plate for LeFort I osteotomy or a bicortical screw for bilateral sagittal split ramus osteotomy were utilized for rigid fixation...
January 2017: Archives of Plastic Surgery
https://www.readbyqxmd.com/read/28178167/intercondylar-fracture-of-the-distal-humerus-in-a-7-year-old-child-a-case-report-and-a-review-of-the-literature
#7
Yuji Tomori, Yoshihiro Sudo, Norishige Iizawa, Mitsuhiko Nanno, Shinro Takai
RATIONALE: Intercondylar fracture of the distal humerus is an extremely rare injury in children, especially in those under 8 years of age. To our best knowledge, there have been 55 reported cases of this fracture type in children in the English literature, 12 of which involved children under 8 years of age. PATIENT CONCERNS: We report a case of intercondylar fracture of the distal humerus in a7-year-old boy fell in a gymnasium, injuring his left elbow. INTERVENTIONS: Closed reduction was initially attempted under fluoroscopic guidance, but anatomic reduction could not be achieved because the fragments were extremely unstable and irreducible...
February 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28177582/treatment-of-mandibular-condyle-fractures-a-twenty-years-review
#8
Marcelo Silva Monnazzi, Marisa Ap Cabrini Gabrielli, Mário Francisco Real Gabrielli, Alexandre Elias Trivellato
BACKGROUND/AIM: The condylar fracture is among the most frequent facial fractures. Despite all the published studies, its treatment remains controversial. The aim of this retrospective study was to evaluate the epidemiology and complications of mandibular condyle fractures managed by surgical and conservative treatment, over a period of twenty years. MATERIAL AND METHODS: The files of 262 patients with 318 condyle fractures were included in this study. One hundred and seven patients had conservative management and 155 had surgical management for the condylar fractures...
February 8, 2017: Dental Traumatology: Official Publication of International Association for Dental Traumatology
https://www.readbyqxmd.com/read/28171766/expression-of-hypoxia-inducible-factor-2-alpha-in-overloaded-stress-induced-destruction-of-mandibular-condylar-chondrocytes
#9
Wen Li, Yanhui Liu, Wanghui Ding, Tan Long, Jiejun Shi
OBJECTIVE: To study the protein expression of HIF-2α in condylar chondrocytes under the different stress loading, to investigate the possible effects of HIF-2α involved in the mortality of condylar chondrocytes under overloaded- stress. MATERIALS AND METHODS: Chondrocytes were isolated from TMJ condylar cartilage and cultured in hypoxia-incubator. Chondrocytes were divided into 4 groups: 0, 1000, 2000, 3000 ustrain group, which was subjected to cyclic tensile strain (CTS) of 0...
January 18, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/28168644/minimal-effect-of-patella-eversion-on-ligament-balancing-in-cruciate-retaining-total-knee-arthroplasty
#10
Eirik Aunan, Thomas Kibsgård, Stephan M Röhrl
PURPOSE: The effect of patellar eversion on ligament laxity measurements is still unclear. The purpose of this study was to investigate the influence of patellar eversion on medial and lateral ligament laxity measurements performed intra-operatively in total knee arthroplasty (TKA). METHODS: A total of 49 knees (27 female) with mean age 70 years (42-83) and mean body mass index of 28.5 were operated consecutively with a cruciate-retaining prosthesis. Medial and lateral ligament laxity in extension and in 90° of flexion was measured with the spatula-method intra-operatively after implantation of the prosthetic components with the patella everted and thereafter with the patella repositioned...
February 7, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28167876/comparison-of-revision-rates-of-non-modular-constrained-versus-posterior-stabilized-total-knee-arthroplasty-a-propensity-score-matched-cohort-study
#11
Mohamed E Moussa, Yuo-Yu Lee, Geoffrey H Westrich, Nabil Mehta, Stephen Lyman, Robert G Marx
BACKGROUND: Attaining stability during total knee arthroplasty (TKA) is essential for a successful outcome. Although traditional constrained total knee prostheses have generally been used in conjunction with intramedullary stems, some devices have been widely used without the use of stems, referred to as non-modular constrained condylar total knee arthroplasty (NMCCK). QUESTIONS/PURPOSES: The aim of this study was to compare revisions rates after total knee replacement with a non-modular constrained condylar total knee (NMCCK) compared to a posterior-stabilized (PS) design...
February 2017: HSS Journal: the Musculoskeletal Journal of Hospital for Special Surgery
https://www.readbyqxmd.com/read/28165605/rotational-alignment-of-the-knee-is-different-in-osteological-specimens-with-and-without-a-large-cam-deformity-of-the-proximal-femur
#12
Jeremy J Gebhart, Jonathan J Streit, Avi Goodman, Jordan Etscheidt, Douglas S Weinberg, Asheesh Bedi, Shane J Nho, Michael J Salata
PURPOSE: We studied a large osteological collection for differences in knee rotation based upon the presence or absence of a large cam deformity of the proximal femur. METHODS: We obtained 357 matched tibiae and femora from the Hamann-Todd Osteological Collection and measured: femoral head-neck alpha angle, anteroposterior axis (or Whiteside's line) at the distal femur relative to the posterior condylar axis, and position of the tibial tubercle with respect to the posterior condylar axis of the proximal tibia...
February 2, 2017: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/28165592/selection-of-a-surgical-approach-for-total-hip-arthroplasty-according-to-the-depth-to-the-surgical-site
#13
Takaaki Ohmori, Tamon Kabata, Toru Maeda, Yoshitomo Kajino, Tadashi Taga, Kazuhiro Hasegawa, Daisuke Inoue, Takashi Yamamoto, Tomoharu Takagi, Hiroyuki Tsuchiya
BACKGROUND: The surgical depths of approaches for total hip arthroplasty (THA) have not been reported previously. In this study, we investigate the relationships between the distances to the centre of the femoral head in different approaches and body mass index (BMI). METHODS: The study included patients with normal hip joints who presented to our hospital. We used the pelvic coordinate system relative to the anterior pelvic plane and the femur coordinate system relative to the posterior condylar plane...
February 4, 2017: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/28159582/a-comparative-evaluation-of-cbct-outcomes-of-two-closed-treatment-methods-in-intracapsular-condylar-fractures
#14
Yanmei Tang, Min Zhu, Xiaoling Wang, Yanfei Zhu, Huijun Sun
PURPOSE: The cone beam computed tomography (CBCT) images of 2 closed treatments are compared for intracapsular condylar fractures (ICFs) to learn whether splint treatment could promote better radiologic outcomes. PATIENTS AND METHODS: Fifty-four patients with 60 sides of ICF were divided into 2 groups. In the control group (C-group), patients had a liquid diet for 1 month. In the trial group (T-group), patients wore splints with anterior elastic traction. Local CBCT images of the temporomandibular joint were obtained at T0 (mean 8...
December 7, 2016: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
https://www.readbyqxmd.com/read/28156214/a-2d-threshold-of-the-condylar-c1-interval-to-maximize-identification-of-patients-at-high-risk-for-atlantooccipital-dislocation-using-computed-tomography
#15
Vijay M Ravindra, Jay Riva-Cambrin, Kevin P Horn, Jason Ginos, Russell Brockmeyer, Jian Guan, John Rampton, Douglas L Brockmeyer
OBJECTIVE Measurement of the occipital condyle-C1 interval (CCI) is important in the evaluation of atlantooccipital dislocation (AOD) in pediatric trauma patients. The authors studied a large cohort of children with and without AOD to identify a 2D measurement threshold that maximizes the diagnostic yield of the CCI on cervical spine CT scans obtained in trauma patients. METHODS This retrospective, single-center study included all children who underwent CT of the cervical spine at Primary Children's Hospital from January 1, 2011, through December 31, 2014, for trauma evaluation...
February 3, 2017: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/28155834/variation-in-the-posterior-condylar-angle
#16
Łukasz Cielmski, Damian Kusz, Michał Wójcik, Jakub Kamiński, Marcin Kusz
BACKGROUND: Clinical success of TKR depends to a large extent on the correct positioning of the implants. The femur cut is usually made in 3° of external rotation relative to the posterior aspect of the femoral condyles, which is a typical value of the Posterior Condylar Angle (PCA). The aim of this study was to assess variation in the PCA and to identify possible correlations between the value of the PCA and the following parameters: gender, body side, body height and weight (BMI). MATERIAL AND METHODS: The study group comprised 75 patients who underwent an Angio-CT study between 2012 and 2014 due to a suspected vascular disorder...
November 30, 2016: Ortopedia, Traumatologia, Rehabilitacja
https://www.readbyqxmd.com/read/28153564/computer-assisted-surgical-planning-and-simulation-for-unilateral-condylar-benign-lesions-causing-facial-asymmetry
#17
Chuan Lu, Dongmei He, Chi Yang, Dong Huang, Edward Ellis
OBJECTIVE: The purpose of this study was to investigate the best surgical sequence for the treatment of unilateral condylar benign lesions causing facial asymmetry by applying computer-assisted surgical planning and simulation. STUDY DESIGN: Computed tomography (CT) data from 12 patients whose maxillary cant was corrected by maintaining the vertical position of the central incisors and equally intruding the long side of the maxilla and extruding the short side were analyzed by ProPlan CMF 1...
December 7, 2016: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
https://www.readbyqxmd.com/read/28153187/where-are-the-advancements-in-the-management-of-mandibular-condylar-process-fractures
#18
EDITORIAL
Martin B Steed
No abstract text is available yet for this article.
March 2017: Atlas of the Oral and Maxillofacial Surgery Clinics of North America
https://www.readbyqxmd.com/read/28153186/management-of-pediatric-and-adolescent-condylar-fractures
#19
REVIEW
Martin B Steed, Caleb M Schadel
No abstract text is available yet for this article.
March 2017: Atlas of the Oral and Maxillofacial Surgery Clinics of North America
https://www.readbyqxmd.com/read/28153185/plating-options-for-fixation-of-condylar-neck-and-base-fractures
#20
REVIEW
Eric L Bischoff, Ryan Carmichael, Likith V Reddy
No abstract text is available yet for this article.
March 2017: Atlas of the Oral and Maxillofacial Surgery Clinics of North America
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