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https://www.readbyqxmd.com/read/28209017/spec-rekindled-a-simple-torque-correction-mechanics-for-transposed-teeth-in-conjunction-with-pre-adjusted-edgewise-appliance-system
#1
Harpreet Singh, Raj Kumar Maurya, Surbhi Thakkar
Complete transposition of teeth is a rather rare phenomenon. After correction of transposed and malaligned lateral incisor and canine, attainment of appropriate individual antagonistic tooth torque is indispensable, which many orthodontists consider to be a herculean task. Here, a novel method is proposed which demonstrates the use of Spec reverse torquing auxillary as an effective adjunctive aid in conjunction with pre-adjusted edgewise brackets.
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28207663/role-of-ethnicity-in-alignment-compensation-propensity-matched-analysis-of-differential-compensatory-mechanism-recruitment-patterns-for-sagittal-malalignment-in-288-asd-patients-from-japan-korea-and-united-states
#2
Bassel G Diebo, Isaac Gammal, Yoon Ha, Seung Hwan Yoon, Jae Won Chang, Byeongwoo Kim, Morio Matsumoto, Yu Yamato, Daisaku Takeuchi, Naobumi Hosogane, Mitsuru Yagi, Hiroshi Taneichi, Frank Schwab, Virginie Lafage, Christopher Ames
STUDY DESIGN: Retrospective review of adult spinal deformity patients in a multiethnic database. OBJECTIVE: To investigate the role of ethnicity on recruitment of compensatory mechanisms for sagittal spinal deformity. SUMMARY OF BACKGROUND DATA: While the impacts of age, sex, and pelvic morphology on the ability to compensate for sagittal malalignment have been investigated, the role of ethnicity in compensatory mechanism recruitment is poorly understood...
February 15, 2017: Spine
https://www.readbyqxmd.com/read/28196041/change-in-talar-translation-in-the-coronal-plane-after-mobile-bearing-total-ankle-replacement-and-its-association-with-lower-limb-and-hindfoot-alignment
#3
Young Yi, Jae-Ho Cho, Ji-Beom Kim, Jae-Young Kim, Su-Yeon Park, Woo Chun Lee
BACKGROUND: Mobile-bearing total ankle replacement (TAR) enables motion at the tibial implant-polyethylene insert interface. This motion could lead to coronal translation of the talus relative to the tibia and may affect radiographic outcome. We aimed to assess the translation of the talus before and after mobile-bearing TAR to determine whether translation of the talus after TAR is associated with coronal plane alignment of the lower limb and hindfoot as well as to investigate the complications associated with talar translation...
February 15, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28184364/tibial-lengthening-using-a-fixator-assisted-lengthening-plate-a-new-technique
#4
Haci Bayram Tosun, Ismail Agir, Seyitali Gumustas, Sancar Serbest, Abuzer Uludag, Suat Celik
BACKGROUND: There are many techniques that are used for limb lengthening. Lengthening a limb over a plate is an alternative choice used in children or when using an intramedullary nail is difficult. OBJECTIVES: In this study, we presented a new technique for tibial lengthening using a monolateral external fixator over a lengthening plate. MATERIALS AND METHODS: For tibial lengthening, a monolateral external fixator was attached to the composite bone model medially...
November 2016: Trauma Monthly
https://www.readbyqxmd.com/read/28169136/in-vitro-wear-of-ultrahigh-molecular-weight-polyethylene-and-vitamin-e-blended-highly-cross-linked-polyethylene-in-linked-semiconstrained-total-elbow-replacement-prostheses
#5
Oludele O Popoola, Brian L Kincaid, Kimberly Mimnaugh, Mark Marqueling
BACKGROUND: The objectives of this study were to develop a clinically relevant in vitro elbow wear test and to compare the polyethylene wear of 2 total elbow replacement prostheses, one that uses conventional gamma-irradiated polyethylene (CPE) and one that uses vitamin E blended and cross-linked polyethylene (VE-HXPE) bushings. MATERIALS AND METHODS: The test protocol applied 0° to 85° flexion-extension motions and imposed a constant 4.5° varus malalignment of the ulnar relative to the humeral implant under a variable joint load profile at a frequency of 1 Hz...
February 3, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28164114/impact-of-sagittal-balance-on-clinical-outcomes-in-surgically-treated-t12-and-l1-burst-fractures-analysis-of-long-term-outcomes-after-posterior-only-and-combined-posteroanterior-treatment
#6
M Mayer, R Ortmaier, H Koller, J Koller, W Hitzl, A Auffarth, H Resch, A von Keudell
Objective. Long-term radiological and clinical outcome retrospective study of surgical treatment for T12 and L1 burst fractures in perspective of sagittal balance measures. Methods. Patients with age of 16-60 years, complete radiographs, early surgical treatment surgery, and follow-up (F/U) > 18 months were included and strict exclusion criteria applied. Regional and thoracolumbar kyphosis angles (RKA and TLA) were measured preoperatively and at final F/U, as were parameters of the spinopelvic sagittal alignment...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28160030/-fixed-bearing-unicondylar-arthroplasty-in-medial-osteoarthritis-of-the-knee
#7
R Becker, C Paech, A Denecke
OBJECTIVE: The unicondylar prosthesis replaces the medial femerotibial compartment only, the part presenting with osteoarthritic changes. The remaining compartments of the knee present less osteoarthritic changes and thus can be preserved. INDICATIONS: Osteoarthritis of the medial femorotibial compartment is the ideal indication for unicondylar arthroplasty. The knee should show an intraarticular deformity, which means the malalignment is caused by the osteoarthritic changes of the medial compartment...
February 2017: Operative Orthopädie und Traumatologie
https://www.readbyqxmd.com/read/28155677/finite-element-analysis-of-the-valgus-knee-joint-of-an-obese-child
#8
Jun Sun, Songhua Yan, Yan Jiang, Duo Wai-Chi Wong, Ming Zhang, Jizhou Zeng, Kuan Zhang
BACKGROUND: Knee valgus and varus morbidity is at the second top place in children lower limb deformity diseases. It may cause abnormal stress distribution. The magnitude and location of contact forces on tibia plateau during gait cycle have been indicated as markers for risk of osteoarthritis. So far, few studies reported the contact stress and force distribution on tibial plateau of valgus knee of children. METHODS: To estimate the contact stresses and forces on tibial plateau of an 8-year old obese boy with valgus knee and a 7-year old healthy boy, three-dimensional (3D) finite element (FE) models of their left knee joints were developed...
December 28, 2016: Biomedical Engineering Online
https://www.readbyqxmd.com/read/28153021/intramedullary-cortical-bone-strut-improves-the-cyclic-stability-of-osteoporotic-proximal-humeral-fractures
#9
Chih-Kun Hsiao, Yi-Jung Tsai, Cheng-Yo Yen, Cheng-Hung Lee, Teng-Yao Yang, Yuan-Kun Tu
BACKGROUND: Proximal humeral fractures treated with locking plate can fail due to varus collapse, especially in osteoporotic bone with medial cortex comminution. The use of an intramedullary strut together with locking plate fixation may strengthen fixation and provide additional medial support to prevent the varus malalignment. This study biomechanically investigates the influence of an intramedullary cortical bone strut on the cyclic stability of proximal humeral fractures stabilized by locking plate fixation in a cadaver model...
February 2, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28145000/filamin-b-loss-of-function-mutation-in-dimerization-domain-causes-autosomal-recessive-spondylocarpotarsal-synostosis-syndrome-with-rib-anomalies
#10
Chi-Fan Yang, Chung-Hsing Wang, Weng Siong H'ng, Chun-Ping Chang, Wei- De Lin, Yuan-Tsong Chen, Jer-Yuarn Wu, Fuu-Jen Tsai
Spondylocarpotarsal synostosis syndrome (SCT) is a distinct group of disorders characterized by short stature, disrupted vertebral segmentation with vertebral fusion, scoliosis, lordosis, carpal/tarsal synostosis, and lack of rib anomalies. Mutations in FLNB and MYH3 have been reported for autosomal recessive and autosomal dominant SCT, respectively. We present a family with two patients suffering from autosomal recessive SCT with rib anomalies, including malalignment, crowding, and uneven size and shape of ribs...
February 1, 2017: Human Mutation
https://www.readbyqxmd.com/read/28138717/-patellofemoral-arthroplasty
#11
M Cotic, P Forkel, A B Imhoff
OBJECTIVE: Isolated resurfacing of the trochlea using an inlay prosthesis without changing the complex kinematics of the patellofemoral joint. INDICATIONS: Symptomatic, isolated patellofemoral osteoarthritis or isolated osteochondral lesions, failed conservative and cartilage regeneration procedures. No or concurrently corrected ligament instability, tibiofemoral and patellofemoral malalignment. CONTRAINDICATIONS: Symptomatic patellofemoral osteoarthritis, inflammatory joint disease, chondrocalcinosis, chronic pain syndromes, active infections or knee ankylosis...
February 2017: Operative Orthopädie und Traumatologie
https://www.readbyqxmd.com/read/28131634/comminuted-intraarticular-fractures-of-the-tibial-plateau-lead-to-posttraumatic-osteoarthritis-of-the-knee-current-treatment-review
#12
REVIEW
Matthias Aurich, Veit Koenig, Gunther Hofmann
Posttraumatic osteoarthritis (PTOA) of the knee is a common complication after intra- and extra-articular fractures. Moreover, PTOA may also be a result of isolated cartilage defects, meniscus resections, and ligament injuries. There are various methods of treatment of knee joint fractures. However, in the final stage of a PTOA, when nonoperative treatment fails, endoprosthetic joint replacement is the method of choice. Primary total knee replacement (TKR) for the treatment for a fracture of the knee joint is a rare indication, even at major treatment centers...
January 25, 2017: Asian Journal of Surgery
https://www.readbyqxmd.com/read/28128704/cervical-lordotic-alignment-following-posterior-spinal-fusion-for-adolescent-idiopathic-scoliosis-reciprocal-changes-and-risk-factors-for-malalignment
#13
Kazunori Hayashi, Hiromitsu Toyoda, Hidetomi Terai, Akinobu Suzuki, Masatoshi Hoshino, Koji Tamai, Shoichiro Ohyama, Hiroaki Nakamura
OBJECTIVE Numerous reports have been published on the effectiveness and safety of correction of the coronal Cobb angle and thoracolumbar sagittal alignment in patients with adolescent idiopathic scoliosis (AIS). Suboptimal sagittal alignment, such as decreased thoracic kyphosis (TK), after corrective surgery, is a possible cause of lumbar or cervical spinal degeneration and junctional malalignment; however, few reports are available on reciprocal changes outside of the fused segments, such as the cervical lordotic angle (CLA)...
January 27, 2017: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/28125900/geometry-of-the-valgus-knee
#14
Helge Eberbach, Julian Mehl, Matthias J Feucht, Gerrit Bode, Norbert P Südkamp, Philipp Niemeyer
BACKGROUND: Realignment osteotomies of valgus knee deformities are usually performed at the distal femur, as valgus alignment is considered to be a femoral-based deformity. This dogma, however, has not been proven in a large patient population. Valgus malalignment may also be caused by a tibial deformity or a combined tibial and femoral deformity. PURPOSE: The purposes of this study were (1) to analyze the coronal geometry of patients with valgus malalignment and identify the location of the underlying deformity and (2) to investigate the proportion of cases that require realignment osteotomy at the tibia, the femur, or both locations to avoid an oblique joint line...
December 1, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28117081/post-traumatic-forearm-nonunion-in-healthy-skeletally-immature-children-a-report-on-15-cases
#15
Giovanni Luigi Di Gennaro, Stefano Stilli, Giovanni Trisolino
BACKGROUND: Nonunion is a rare but severe complication following forearm fracture in skeletally immature patients. The purpose of this study is to describe a case series of pediatric forearm nonunions treated at our Institute. MATERIALS AND METHOD: We retrospectively reviewed medical charts and radiographs of healthy children affected by post-traumatic nonunion of the forearm, from April 1992 to July 2015. An overall series of 15 cases was included in the study...
January 9, 2017: Injury
https://www.readbyqxmd.com/read/28112555/incidence-and-association-of-ct-findings-of-ankle-tendon-injuries-in-patients-presenting-with-ankle-and-hindfoot-fractures
#16
Ashkahn Golshani, Liang Zhu, Chunyan Cai, Nicholas M Beckmann
OBJECTIVE: Tendon injuries are a commonly encountered finding in ankle CT examinations performed for fractures. This study was designed to identify the incidence and associations of tendon injuries in ankle CT examinations performed for fractures. MATERIALS AND METHODS: A retrospective review was performed of 410 patients who underwent ankle CT during a 6-year period. RESULTS: Tendon injuries were common, seen in 25% of all ankle CT examinations...
February 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28103870/osteochondral-autograft-transplantation-with-biplanar-distal-tibial-osteotomy-for-patients-with-concomitant-large-osteochondral-lesion-of-the-talus-and-varus-ankle-malalignment
#17
Xingchen Li, Yuan Zhu, Yang Xu, Bibo Wang, Jinhao Liu, Xiangyang Xu
BACKGROUND: Osteochondral lesions of the talus (OLTs) are amongst the most common foot and ankle disorders. Varus ankle malalignment causes stress concentration on medial side of the joint, resulting in OLTs and osteoarthritis. For large symptomatic OLTs (>10 mm), Osteochondral autograft transplantation is usually recommended. This article highlights biplanar distal tibial osteotomy as an approach and management for patients with concomitant large OLTs and varus ankle malalignment...
January 19, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28101590/-minimally-invasive-treatment-of-intra-articular-calcaneal-fractures-with-the-2%C3%A2-point-distractor
#18
G Mattiassich, W Litzlbauer, M Ponschab, R Ortmaier, C Rodemund
OBJECTIVE: Open treatment of calcaneus fractures often has an increased risk of wound healing. Minimally invasive treatment with small incisions reduces complications. INDICATIONS: Calcaneal fractures with malalignment/comminution >1-2 mm; broadening, varus alignment of the calcaneal length axis or shortening; emergency surgery for open fractures or compartment syndrome. CONTRAINDICATIONS: Local or general contraindications. SURGICAL TECHNIQUE: Standardised positioning; restoration of length/axis with 2‑point distractor under fluoroscopic control...
January 18, 2017: Operative Orthopädie und Traumatologie
https://www.readbyqxmd.com/read/28099301/unicompartmental-knee-arthroplasty-provides-higher-activity-and-durability-than-valgus-producing-proximal-tibial-osteotomy-at-5-to-7-years
#19
Aaron J Krych, Patrick Reardon, Paul Sousa, Ayoosh Pareek, Michael Stuart, Mark Pagnano
BACKGROUND: The cases of patients with medial compartment osteoarthritis who were ≤55 years old and had a proximal tibial osteotomy (PTO) or medial unicompartmental knee arthroplasty (UKA) were compared. Outcomes included postoperative activity level, function, and survivorship free of revision to total knee arthroplasty. METHODS: Between 1998 and 2013, data were available for 240 patients between 18 and 55 years old with medial compartment arthritis and varus malalignment who were treated either with PTO (57 patients) or with UKA (183 patients)...
January 18, 2017: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/28093251/malalignment-after-minimally-invasive-plate-osteosynthesis-in-distal-femoral-fractures
#20
Joon-Woo Kim, Chang-Wug Oh, Jong-Keon Oh, Il-Hyung Park, Hee-Soo Kyung, Kyeong-Hyeon Park, Seong-Dae Yoon, Seong-Min Kim
INTRODUCTION: Although minimally invasive plate osteosynthesis (MIPO) is a preferred operative treatment for fractures of the distal femur, malalignment is a significant concern because of indirect reduction of the fracture. The purpose of this study, therefore, was to evaluate radiologic alignment after MIPO for distal femoral fractures. PATIENTS AND METHODS: Of the 138 patients with fracture of the distal femur who underwent MIPO, we enrolled 51 patients in whom bilateral rotational alignment could be assessed by postoperative computed tomography (CT)...
January 10, 2017: Injury
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