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https://www.readbyqxmd.com/read/29776719/three-dimensional-changes-of-proximal-segments-in-facial-asymmetry-patients-after-bilateral-vertical-ramus-osteotomy
#1
J W Huh, S Y Kim, Y-B Lee, J H Park, H-D Jung, Y-S Jung
The intraoral vertical ramus osteotomy (IVRO) is a useful technique for mandibular setback surgery. However, there is a tendency for lateral flaring of the proximal segments on the non-deviation side after the correction of mandibular asymmetry with this technique. The purpose of this retrospective study was to evaluate the positional changes of the proximal segments after IVRO setback in skeletal class III patients with asymmetry, using preoperative and postoperative computed tomography scan data, and to apply the results in clinical practice...
May 15, 2018: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29773499/study-of-condylar-positional-changes-after-sagittal-split-osteotomy-for-mandibular-advancement-a-prospective-cohort-study
#2
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/29769591/clinical-retrospective-case-control-study-on-the-mechanics-of-obstacle-in-mouth-opening-and-malocclusion-in-patients-with-maxillofacial-fractures
#3
Hai-Hua Zhou, Kun Lv, Rong-Tao Yang, Zhi Li, Xue-Wen Yang, Zu-Bing Li
This study aims to identify and distinguish various factors that may influence the clinical symptoms (limited mouth opening and malocclusion) in patients with maxillofacial fractures. From January 2000 to December 2009, 963 patients with maxillofacial fractures were enrolled in this statistical study to aid in evaluating the association between various risk factors and clinical symptoms. Patients with fractured posterior mandibles tended to experience serious limitation in mouth opening. Patients who sustained coronoid fractures have the highest risk of serious limitation in mouth opening (OR = 9...
May 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29767270/no-correlation-between-rotation-of-femoral-components-in-the-transverse-plane-and-clinical-outcome-after-total-knee-arthroplasty
#4
Roland Becker, Katharina Bäker, Hagen Hommel, Manfred Bernard, Sebastian Kopf
PURPOSE: It was hypothesized that malrotation of femoral component in total knee arthroplasty (TKA) will significantly impact clinical outcome. METHODS: Eighty-eight consecutive patients with primary osteoarthritis of the knee were prospectively evaluated. They received a cemented posterior stabilized TKA (NexGen, Zimmer/Biomet® Inc., Warsaw, IN, USA). The femoral component was placed in 3° of external rotation referenced to the posterior condylar line. Postoperatively, a CT scan was performed to evaluate rotation of femoral component in the transverse plane...
May 16, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29763429/factors-affecting-femoral-rotational-angle-based-on-the-posterior-condylar-axis-in-gap-based-navigation-assisted-total-knee-arthroplasty-for-valgus-knee
#5
Sung-Sahn Lee, Yong-In Lee, Dong-Uk Kim, Dae-Hee Lee, Young-Wan Moon
BACKGROUND: Achieving proper rotational alignment of the femoral component in total knee arthroplasty (TKA) for valgus knee is challenging because of lateral condylar hypoplasia and lateral cartilage erosion. Gap-based navigation-assisted TKA enables surgeons to determine the angle of femoral component rotation (FCR) based on the posterior condylar axis. This study evaluated the possible factors that affect the rotational alignment of the femoral component based on the posterior condylar axis...
2018: PloS One
https://www.readbyqxmd.com/read/29763346/mandibular-condylar-aplasia-treated-with-a-functional-appliance-a-five-years-follow-up
#6
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/29762281/an-increased-lateral-femoral-condyle-ratio-is-a-risk-factor-for-anterior-cruciate-ligament-injury
#7
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/29754856/three-dimensional-dental-and-craniofacial-manifestations-in-patients-with-late-diagnosis-of-mucopolysaccharidosis-type-ii-report-of-2-cases
#8
Rafaela de Oliveira Torres, Andréa Vaz Braga Pintor, Fábio Ribeiro Guedes, Lucia Helena Soares Cevidanes, Liana Bastos Freitas-Fernandes, Antônio Carlos de Oliveira Ruellas, Ivete Pomarico Ribeiro de Souza
The objective of this study was to report the clinical evaluation results and 3-dimensional (3-D) dental and craniofacial characteristics observed in 2 male patients with mucopolysaccharidosis type II. The patients were evaluated clinically (soft tissue evaluation, evaluation of occlusion, periodontal and dental examinations) and by using craniofacial computed tomography, with evaluation of 3-D images in ITK-Snap v. 2.2 (Penn Image Computing and Science Laboratory, Philadelphia, PA; http://www.itksnap.org/) and 3-D Slicer (http://www...
April 16, 2018: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
https://www.readbyqxmd.com/read/29753964/a-web-based-system-for-neural-network-based-classification-in-temporomandibular-joint-osteoarthritis
#9
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/29741957/effects-of-proud-large-osteochondral-plugs-on-contact-forces-and-knee-kinematics-a-robotic-study
#10
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
#11
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/29736586/large-animal-models-for-osteochondral-regeneration
#12
Isabel R Dias, Carlos A Viegas, Pedro P Carvalho
Namely, in the last two decades, large animal models - small ruminants (sheep and goats), pigs, dogs and horses - have been used to study the physiopathology and to develop new therapeutic procedures to treat human clinical osteoarthritis. For that purpose, cartilage and/or osteochondral defects are generally performed in the stifle joint of selected large animal models at the condylar and trochlear femoral areas where spontaneous regeneration should be excluded. Experimental animal care and protection legislation and guideline documents of the US Food and Drug Administration, the American Society for Testing and Materials and the International Cartilage Repair Society should be followed, and also the specificities of the animal species used for these studies must be taken into account, such as the cartilage thickness of the selected defect localization, the defined cartilage critical size defect and the joint anatomy in view of the post-operative techniques to be performed to evaluate the chondral/osteochondral repair...
2018: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29735385/does-lag-screw-fixation-of-condylar-fractures-result-in-adequate-stability-a-finite-element-analysis
#13
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/29732312/complications-of-the-retromandibular-transparotid-approach-for-low-condylar-neck-and-subcondylar-fractures-a-retrospective-study
#14
Jeroen Van Hevele, Erik Nout
Objectives: The goal of this study was to evaluate the rates of complications, morbidity, and safety with the transparotid approach. Materials and Methods: A retrospective study was conducted and consisted of 53 surgically treated patients in the past five years for low condylar neck and subcondylar fractures. Only patients with malocclusion and who underwent open reduction with internal fixation with the retromandibular transparotid approach were included. The examined parameters were postoperative suboptimal occlusion, deflection, saliva fistula, and facial nerve weakness...
April 2018: Journal of the Korean Association of Oral and Maxillofacial Surgeons
https://www.readbyqxmd.com/read/29728554/bilateral-condylar-hyperplasia-nonsurgical-management-a-clinical-report
#15
Adrian Seto, Michael G Botelho, Edward Ht Ho, Nithya Jagannathan
Background: Patients present with malocclusions in the form of bilateral open bite with functional and esthetic challenges. These are particularly so whereby these are acquired through growth anomalies that create a change in the occlusal status whereby a patient has to adapt to the challenge of the occlusal change. While surgical intervention is a considered option to correct such changes, not all patients are willing to endure the consequences of this intervention and as such this report presents a conservative minimally invasive approach...
April 1, 2018: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/29727866/gender-disparity-between-absolute-versus-relative-size-of-condylar-chondral-defects-an-mri-analysis
#16
Daniel Berman, Kelly Rogers, Kevin Bonner, Justin Griffin
Surgical repair of articular cartilage defects in the knee currently utilizes surgical algorithms based on absolute defect size. These algorithms, which have not been validated, are currently utilized not only by surgeons but also by insurance carriers for justification of reimbursement policy. However, current algorithms do not account for morphological differences between individual patients and defect size relative to condylar dimension. We hypothesized that a significant difference in relative defect size compared with condylar dimension may exist between individuals...
May 4, 2018: Journal of Knee Surgery
https://www.readbyqxmd.com/read/29726736/dural-arteriovenous-fistula-of-the-lateral-foramen-magnum-region-a-review
#17
Chao Li, Jing Yu, Kailing Li, Kun Hou, Jinlu Yu
The lateral foramen magnum region is defined as the bilateral occipital area that runs laterally up to the jugular foramen. The critical vasculatures of this region are not completely understood. Dural arteriovenous fistulas that occur in this region are rare and difficult to treat. Therefore, we searched PubMed to identify all relevant previously published English language articles about lateral foramen magnum dural arteriovenous fistulas, and we performed a review of this literature to increase understanding about these fistulas...
January 1, 2018: Interventional Neuroradiology
https://www.readbyqxmd.com/read/29725847/classification-proposal-for-fractures-of-the-processus-condylaris-mandibulae
#18
Marcin Kozakiewicz
OBJECTIVE: The current classification of mandibular condyle fractures as basal, low neck, and high neck as reported by Loukota et al. (Br J Oral Maxillofac Surg 43:72-73, 2005) and Neff et al. (Craniomaxillofac Trauma Reconstr 7:S44-S58, 2014) has a weakness. Nearly no high-neck fractures are reported (they are typically classified as type C head fractures) contrary to basal condylar fractures, which are overestimated (nearly all low-neck fractures are classified as basal). The aim of this study is to present a modified AO/SORG classification of mandibular condyle fractures...
May 3, 2018: Clinical Oral Investigations
https://www.readbyqxmd.com/read/29723657/the-use-of-reconstruction-plates-to-treat-benign-mandibular-pathological-lesions-a-retrospective-clinical-study
#19
S C Isler, B Keskin Yalcin, S Cakarer, E Cansiz, A Gumusdal, C Keskin
INTRODUCTION: The purpose of this retrospective clinical study was to evaluate the indications for and the utility of reconstruction plates in the management of benign mandibular pathological lesions. The complications associated with plate use were also assessed. PATIENTS AND METHODS: The clinical and radiological data of 23 patients (16 males, 7 females) with large, benign mandibular pathologies were evaluated. During operations, reconstruction plates were used to prevent mandibular fracture or to allow for bone reconstruction after segmental or disarticulation resection...
April 30, 2018: Journal of Stomatology, Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29720218/the-anteroposterior-axis-of-the-tibia-is-adjusted-to-approximately-a-right-angle-to-the-anterior-pelvic-plane-in-the-standing-position-in-patients-with-hip-dysplasia-similar-to-normal-subjects-a-cross-sectional-study
#20
Norio Imai, Dai Miyasaka, Hayato Suzuki, Kazuki Tsuchiya, Tomoyuki Ito, Izumi Minato, Naoto Endo
BACKGROUND: We previously described that the anteroposterior (AP) axis of the tibia is approximately perpendicular to the transverse axis of the anterior pelvic plane (APP) in the standing position in healthy subjects. The purpose of this study was to investigate the rotational alignment between the APP and clinical epicondylar axis and the AP axis of the tibia relative to pelvic coordination in the standing position in normal subjects and in women with developmental dysplasia of the hip (DDH) to aid decision making for surgeons in the alignment of implants in total hip or knee arthroplasty...
May 2, 2018: Journal of Orthopaedic Surgery and Research
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