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https://www.readbyqxmd.com/read/29327547/-finite-element-analysis-on-the-effect-of-lateral-wedge-insole-intervention-on-the-contact-characteristics-of-the-subtalar-joint
#1
En-Chang Zhou, Ping Tang, Chuan-Ying Zhu, Shi-Ming Liu
OBJECTIVE: To establish a three-dimensional finite element model of the lower limb bones, and investigate the changes of the contact characteristics of the subtalar joint after using laterally wedge insole intervention. METHODS: Using the reverse modeling technology, the lower limb bones of normal adult volunteers was scanned by CT. Mimics 10.0 and Geomagic Studio 6.0 software were used to reconstruct the 3D morphology of bones and external soft tissue of the feet...
January 25, 2017: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29322984/a-device-for-three-dimensional-quantitative-assessment-and-alignment-of-c1-2-vertebrae-during-posterior-distraction-and-fusion-technique-for-atlantoaxial-dislocation-and-or-basilar-invagination
#2
P B Karthik, Jayesh Sardhara, Nachiketa Tiwari, Sanjay Behari
The most common type of congenital C1-2 dislocation is a combined type in which atlanto-axial dislocation (AAD) and basilar invagination (BI) are often associated with a rotational dislocation and coronal tilt. An optimal surgical treatment involves reduction of AAD and BI with simultaneous correction of the rotation and coronal tilt to achieve an optimal cervical canal decompression, sagittal and coronal realignment and bony fusion. The most acceptable technique to facilitate this correction is the C1-C2 distraction technique, which is accomplished by the manual joint manipulation...
January 2018: Neurology India
https://www.readbyqxmd.com/read/29320923/the-effect-of-seated-pelvic-tilt-on-posterior-edge-loading-in-total-hip-arthroplasty-a-finite-element-investigation
#3
Jim Pierrepont, Long Yang, Jevan Arulampalam, Catherine Stambouzou, Brad Miles, Qing Li
Edge-loading of a ceramic-on-ceramic total hip replacement can lead to reproducible squeaking and revision. A patient's functional acetabular cup orientation, driven by their pelvic tilt, has been shown to be a significant factor in squeaking during hip flexion. The aim of this study was to investigate the effect of seated pelvic tilt on the contact mechanics at the ceramic bearing surface. A finite element model of a ceramic-on-ceramic total hip replacement was created. The cup was orientated at 40° inclination and 15° anteversion relative to the anterior pelvic plane...
January 1, 2018: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/29298262/body-mass-index-affects-proximal-femoral-but-not-acetabular-morphology-in-adolescents-without-hip-pathology
#4
Eduardo N Novais, Sandra J Shefelbine, Karl-Philipp Kienle, Patricia E Miller, Garrett Bowen, Young-Jo Kim, Sarah D Bixby
BACKGROUND: Increased mechanical load secondary to a large body mass index (BMI) may influence bone remodeling. The purpose of this study was to investigate whether BMI is associated with the morphology of the proximal part of the femur and the acetabulum in a cohort of adolescents without a history of hip disorders. METHODS: We evaluated pelvic computed tomographic (CT) images in 128 adolescents with abdominal pain without a history of hip pathology. There were 44 male patients (34%) and the mean patient age (and standard deviation) was 15 ± 1...
January 3, 2018: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/29284976/pterygoid-implant-for-atrophic-posterior-maxilla
#5
V R Balaji, R Lambodharan, D Manikandan, S Deenadayalan
Replacement of missing teeth in the posterior maxilla is always a challenge for the treating implant surgeon as the posterior maxilla has several obstacles in the form of quality, quantity, the anatomy of the maxillary sinus, and inaccessibility. To overcome these deficiencies, several surgical procedures such as sinus lift, bone augmentation, tilted implants, short implants, and zygomatic implants were tried. Since these procedures have their own limitations, pterygomaxillary region provides us an excellent place for placement of implant and rehabilitation of posterior maxilla...
November 2017: Journal of Pharmacy & Bioallied Sciences
https://www.readbyqxmd.com/read/29247396/the-mechanism-in-junctional-failure-of-thoraco-lumbar-fusions-part-ii-analysis-of-a-series-of-pjk-after-thoraco-lumbar-fusion-to-determine-parameters-allowing-to-predict-the-risk-of-junctional-breakdown
#6
Antonio A Faundez, Jonathon Richards, Philippe Maxy, Rachel Price, Amélie Léglise, Jean-Charles Le Huec
PURPOSE: To identify risk factors, in 12 patients with junctional breakdown (JBD) after thoraco-sacral fusions and to test a software locating maximal bending moment on full spine EOS images. METHODS: Twelve patients underwent long fusions for lumbar degenerative pathologies. Preop EOS images were compared to first postop EOS showing JBD. Parameters analyzed were: spinopelvic parameters [pelvic incidence (PI), pelvic tilt (PT), sacral slope (SS), sagittal vertical axis (SVA), spinosacral angle (SSA), lordosis, and kyphosis], proximal junctional angle (PJA), odontoid-hip axis angle (ODHA), and CIA...
December 15, 2017: European Spine Journal
https://www.readbyqxmd.com/read/29246481/shoulder-patient-specific-guide-first-experience-in-10-patients-indicates-room-for-improvement
#7
J Berhouet, M Rol, C Spiry, M Slimane, C Chevalier, L Favard
BACKGROUND: Implantation of the glenoid component of a total shoulder prosthesis can be facilitated by using a patient-specific guide (PSG) designed to ensure replication of the preoperatively planned position. The objective of this study was to assess the reliability and accuracy of a PSG in replicating the planned glenoid component position during total shoulder arthroplasty (TSA). HYPOTHESIS: Additional criteria should be used for 3D preoperative planning and PSG design to further improve the accuracy of glenoid component positioning...
December 12, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/29245239/predictors-of-ultimate-postoperative-cervical-sagittal-alignment-in-main-thoracic-adolescent-idiopathic-scoliosis-a-long-term-follow-up-study
#8
Zhen Zhang, Zhen Liu, Zezhang Zhu, Yong Qiu
This is a retrospective study. The aim of this study was to access sagittal compensatory mechanism of the cervical spine in thoracic adolescent idiopathic scoliosis (T-AIS) before and after posterior spinal fusion and to identify preoperative or immediate postoperative radiographic parameters that can predict the ultimate cervical sagittal alignment (CSA) after long-term follow-up.A retrospective study was performed on 44 T-AIS patients treated with posterior spinal fusion and with at least 5 years of follow-up...
December 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29245096/pre-and-post-operative-evaluation-of-pincer-type-femoroacetabular-impingement-during-squat-using-image-matching-techniques-a-case-report
#9
Kensei Yoshimoto, Satoshi Hamai, Hidehiko Higaki, Hirotaka Gondo, Satoru Ikebe, Yasuharu Nakashima
INTRODUCTION: Although combined evaluation of hip joint kinematics and bone morphology is necessary for accurate assessment of femoroacetabular impingement (FAI), there are no report which evaluated hip kinematics of pincer-type FAI. PRESENTATION OF CASE: The pre- and postoperative hip kinematics of a 46-year-old man, with a pincer-type FAI during squat were evaluated using image-matching techniques and the rim-neck distance was measured. Preoperative simulation of squatting was also performed using patient's bone models and healthy subject's kinematics data to detect the overlapping lesion between the acetabulum and the femur...
December 8, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/29241660/effects-of-glenohumeral-internal-rotation-deficit-on-baseball-pitching-among-pitchers-of-different-ages
#10
Paul Pei-Hsi Chou, You-Li Chou, Yan-Sheng Wang, Rong-Tyai Wang, Hwai-Ting Lin
BACKGROUND: Previous studies have reported that glenohumeral internal rotation deficit (GIRD) may increase the risk of shoulder injury. However, the effects of GIRD on baseball pitching among pitchers of different age groups are still unclear. METHODS: The study participants were 24 high school and 24 university pitchers. For each age group, the pitchers were evenly divided into a GIRD group and a normal group. The pitching motion of each participant was captured using a motion analysis system at a sampling frequency of 300 Hz...
December 11, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29232748/-combined-posteromedial-and-anterolateral-approach-in-the-floating-position-two-column-fracture-of-the-tibia-head
#11
Maike Reul, Harm Hoekstra
Background The posterior tibial plateau is often affected in intra-articular tibial fractures. Moreover, treating these posterior fractures is recognised as an important prognostic factor. Open reduction and internal fixation of lateral and posterior two column tibial plateau fractures can be achieved via a combined reversed L-shape approach and an anterolateral approach in the floating position without intraoperative repositioning of the patient. Material and Methods The operative procedure starts in the posterior position with visualisation of the posterior column after lateral retraction of the medial head of the M...
December 2017: Zeitschrift Für Orthopädie und Unfallchirurgie
https://www.readbyqxmd.com/read/29214074/tilt-decentration-and-internal-higher-order-aberrations-of-sutured-posterior-chamber-intraocular-lenses-in-patients-with-open-globe-injuries
#12
Xiangjia Zhu, Yinglei Zhang, Wenwen He, Hongfei Ye, Chunhui Jiang, Yi Lu
Purpose: To evaluate the tilt, decentration, and internal higher-order aberrations (HOAs) of sutured posterior-chamber intraocular lenses (IOLs) in patients with open globe injuries. Methods: 46 consecutive patients (47 eyes) who underwent transsclerally sutured IOL implantation were enrolled in this prospective cohort study. Nineteen eyes had a history of open globe injury. The tilt and decentration of the IOLs and the visual quality were measured 1 month after surgery...
2017: Journal of Ophthalmology
https://www.readbyqxmd.com/read/29200653/research-describing-pelvifemoral-rhythm-a-systematic-review
#13
REVIEW
Richard W Bohannon, Aaron Bass
[Purpose] This systematics review was undertaken to synthesize what is known regarding pelvifemoral rhythm, that is, the coordinated flexion of the thigh and posterior tilting of the pelvis during hip flexion (HF). [Methods] Three databases were searched. [Results] Nine relevant articles were identified via independent database searches and a hand search by the authors. The articles were consistent in showing that pelvifemoral rhythm underlies the HF motion under conditions as varied as passive unilateral flexion while supine and active bilateral flexion while hanging from a bar...
November 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/29200642/the-effects-of-calcaneal-posture-on-thoracolumbar-alignment-in-a-standing-position
#14
Seon-Chil Kim, Jae-Hoon Yi, Sang-Woo Jung, Dong-Kwon Seo
[Purpose] Severe calcaneus misalignment is correlated with low back pain, and affects pelvic alignment. However, little has been published with regard to the influence of pronation and supination on trunk alignment. Therefore, the present study aimed to investigate the influence of calcaneal inversion on pelvic and trunk alignment. [Subjects and Methods] A 3-dimensional motion analysis system was used to assess pelvic and trunk alignment in 10 healthy male subjects with unilateral and bilateral calcaneus inversion...
November 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/29191442/adding-patella-resurfacing-after-circumpatellar-electrocautery-did-not-improve-the-clinical-outcome-in-bilateral-total-knee-arthroplasty-in-chinese-population-a-prospective-randomized-study
#15
Yulei Dong, Tao Li, Zhibo Zheng, Shuai Xiang, Xisheng Weng
BACKGROUND: In total knee arthroplasty (TKA), handling of the patella surface is still quite controversial. We carried out a prospective randomized study to compare circumpatellar electrocautery plus patella resurfacing vs circumpatellar electrocautery only in the single-staged bilateral TKA in Chinese population. METHODS: One hundred five patients diagnosed with late-staged osteoarthritis who received single-staged bilateral TKA were screened and 53 patients were included...
October 31, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29191100/preliminary-results-of-anterior-lumbar-interbody-fusion-anterior-column-realignment-for-the-treatment-of-sagittal-malalignment
#16
Pooria Hosseini, Gregory M Mundis, Robert K Eastlack, Ramin Bagheri, Enrique Vargas, Stacie Tran, Behrooz A Akbarnia
OBJECTIVE Sagittal malalignment decreases patients' quality of life and may require surgical correction to achieve realignment goals. High-risk posterior-based osteotomy techniques are the current standard treatment for addressing sagittal malalignment. More recently, anterior lumbar interbody fusion, anterior column realignment (ALIF ACR) has been introduced as an alternative for correction of sagittal deformity. The objective of this paper was to report clinical and radiographic results for patients treated using the ALIF-ACR technique...
December 2017: Neurosurgical Focus
https://www.readbyqxmd.com/read/29188334/increased-in-vivo-patellofemoral-loading-after-total-knee-arthroplasty-in-resurfaced-patellae
#17
Omer Slevin, Florian A Schmid, Filippo Schiapparelli, Helmut Rasch, Michael T Hirschmann
PURPOSE: The primary purpose of the study was to investigate if and how patellar bone tracer uptake (BTU) distribution in SPECT/CT is influenced by patellar resurfacing and the position of femoral and tibial TKA component position. METHODS: A total of 104 knees of 103 consecutive patients who underwent primary TKA were prospectively investigated. Primary patellar resurfacing was done in 40 knees while 64 had a TKA without patellar resurfacing. All patients underwent clinical assessment using the knee society score (KSS) and standardized radiographs and Tc-99m-HDP-SPECT/CT before and 12 and 24 months after TKA...
November 29, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29183307/the-immediate-effect-of-muscle-release-intervention-on-muscle-activity-and-shoulder-kinematics-in-patients-with-frozen-shoulder-a-cross-sectional-exploratory-study
#18
Yi-Fen Shih, Pei-Wen Liao, Chun-Shou Lee
BACKGROUND: Contractile tissue plays an important role in mobility deficits in frozen shoulder (FS). However, no study has assessed the effect of the muscle release technique on the muscle activation and kinematics in individuals with FS. The purposes of this study were to assess the differences in shoulder muscle activity and kinematics between the FS and asymptomatic groups; and to determine the immediate effects of muscle release intervention in the FS group. METHODS: Twenty patients with FS and 20 asymptomatic controls were recruited...
November 28, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29179028/kinematic-analysis-of-scapular-movements-in-patients-with-facioscapulohumeral-muscular-dystrophy
#19
C Savcun Demirci, E Turgut, E Ayvat, Ö Onursal, F Ayvat, T I Yıldız, I Düzgün, M Kılınç, S Aksu Yıldırım
The purpose of this study is to evaluate scapular movements by the three-dimensional electromagnetic system during shoulder elevation in FSHMD patients, and to compare the results with healthy individuals. 10 patients with FSHMD and 10 healthy individuals were included in the study. Scapular anterior-posterior tilt, upward-downward rotation and internal-external rotation at 30°, 60° and 90° were evaluated using the three-dimensional electromagnetic system during the elevation of the upper limbs in the scapular plane...
November 14, 2017: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/29171827/comparing-the-anterior-posterior-and-lateral-approach-gait-analysis-in-total-hip-arthroplasty
#20
Stephen Petis, James Howard, Brent Lanting, Ian Jones, Trevor Birmingham, Edward Vasarhelyi
BACKGROUND: The choice of surgical approach for total hip arthroplasty (THA) remains a contentious issue with regards to clinical outcome optimization and restoring patient function. The purpose of this study was to determine the impact of surgical approach for THA on quantitative gait analysis. METHODS: Patients undergoing THA for primary osteoarthritis of the hip were assigned to 1 of 3 surgical approaches: anterior, posterior and lateral. Standardized implants were used at the time of surgery...
December 1, 2017: Canadian Journal of Surgery. Journal Canadien de Chirurgie
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