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Subluxation

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https://www.readbyqxmd.com/read/28089827/plication-of-the-posterior-capsule-for-intraoperative-posterior-instability-during-anatomic-total-shoulder-arthroplasty
#1
Eduard Alentorn-Geli, Andrew T Assenmacher, John W Sperling, Robert H Cofield, Joaquín Sánchez-Sotelo
BACKGROUND: Restoration of soft tissue balance for intraoperative posterior instability during anatomic total shoulder arthroplasty (TSA) is particularly difficult. The effectiveness of posterior capsular plication (PCP) in restoring soft tissue balance is largely unknown. The purpose of this study was to report the outcomes, complications, and reoperations of primary TSA in which a PCP was performed to correct excessive intraoperative posterior subluxation. METHODS: Thirty-eight shoulders (37 patients) underwent PCP for intraoperative posterior instability during anatomic TSA...
January 12, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28089259/prosthetic-replacement-for-coronoid-deficiency-report-of-three-cases
#2
Enrico Bellato, Shawn W O'Driscoll
BACKGROUND: Persistent elbow instability associated with coronoid deficiency is a difficult condition to treat. Several surgical techniques have been described for coronoid reconstruction, but the resulting outcomes have been unpredictable. We hypothesized that a coronoid prosthesis could restore elbow stability. METHODS: A nonanatomically shaped metallic coronoid prosthesis was custom designed for each of 3 patients. Each had a chronic fracture-subluxation with persistent instability, deficiencies of the coronoid, and compromise of the radial head...
January 11, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28089255/characterization-of-the-walch-b3-glenoid-in-primary-osteoarthritis
#3
Kevin Chan, Nikolas K Knowles, Jean Chaoui, Marc-Olivier Gauci, Louis M Ferreira, Gilles Walch, George S Athwal
BACKGROUND: The type B3 glenoid is an addition to the Walch classification. A potential etiologic theory is that it is a progression of the B2. It is characterized by uniconcavity, absent paleoglenoid, medialization, retroversion, and subluxation. The purpose of this study was to describe the morphology of B3 glenoids. METHODS: Fifty-two patients with B3 glenoids underwent 3-dimensional analysis of computed tomography data. Glenoid measurements (retroversion, inclination, medialization) and humeral head subluxation according to the scapular and glenoid planes were determined...
January 11, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28089129/kinematic-magnetic-resonance-imaging-of-peroneal-tendon-subluxation-with-intraoperative-correlation
#4
Michael D VanPelt, Matthew R Landrum, Matthew Igbinigie, Vibhor Wadhwa, Avneesh Chhabra
Magnetic resonance imaging (MRI) is a noninvasive modality of choice for the detection of static peroneal tendon pathologic features. The depiction of peroneal tendon subluxation using real-time kinematic MRI has not been previously reported. We describe the MRI and intraoperative correlation of peroneal tendon and retinacular pathologic findings, and the novel use of kinematic MRI in the illustration of peroneal tendon subluxation.
January 6, 2017: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/28070611/dual-mobility-cups-provide-biomechanical-advantages-in-situations-at-risk-for-dislocation-a-finite-element-analysis
#5
Alexandre Terrier, Adeliya Latypova, Maika Guillemin, Valérie Parvex, Olivier Guyen
PURPOSE: Constrained devices, standard implants with large heads, and dual mobility systems have become popular options to manage instability after total hip arthroplasty (THA). Clinical results with these options have shown variable success rates and significant higher rates of aseptic loosening and mechanical failures with constrained implants. Literature suggests potential advantages of dual mobility, however little is known about its biomechanics. We present a comparative biomechanical study of a standard implant, a constrained implant, and a dual mobility system...
January 9, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28064003/a-semi-automated-quantitative-ct-method-for-measuring-rotator-cuff-muscle-degeneration-in-shoulders-with-primary-osteoarthritis
#6
Alexandre Terrier, Julien Ston, Antoine Dewarrat, Fabio Becce, Alain Farron
BACKGROUND: Rotator cuff muscle degeneration is an important parameter to consider when planning shoulder arthroplasty. HYPOTHESIS: We hypothesized that rotator cuff muscle degeneration is correlated with scapulohumeral subluxation in patients planned for anatomical total shoulder arthroplasty (TSA). MATERIALS AND METHODS: We developed a semi-automated quantitative CT method to measure rotator cuff muscle degeneration, and retrospectively analyzed 107 preoperative shoulder CT scans of patients with primary osteoarthritis...
January 4, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28058967/the-value-of-computed-tomography-in-detecting-distal-radio-ulnar-joint-instability-after-a-distal-radius-fracture
#7
R H van Leerdam, M M E Wijffels, M Reijnierse, W Stomp, P Krijnen, I B Schipper
: This study evaluated the value of computed tomography scans for the diagnosis of distal radioulnar joint instability. A total of 46 patients, conservatively treated for a unilateral distal radius fracture, were evaluated. Clinical instability was tested using the stress test and clunk test. A computed tomography scan of both wrists was performed in pronation and supination. Two independent observers reviewed the computed tomography scans using: the radioulnar line, subluxation ratio, epicentre and radioulnar ratio methods...
January 1, 2017: Journal of Hand Surgery, European Volume
https://www.readbyqxmd.com/read/28057359/-posterior-subluxation-of-the-crystalline-lens-in-a-contusion-trauma
#8
S El Haouzi, R Daoudi
No abstract text is available yet for this article.
January 2, 2017: Journal Français D'ophtalmologie
https://www.readbyqxmd.com/read/28042714/current-status-of-iol-implantation-in-pediatric-eyes-an-update
#9
Abhay R Vasavada, Vaishali Vasavada
Pediatric cataracts are a huge problem worldwide, and with improving techniques and technology, the surgical treatment and postoperative visual rehabilitation are improving. Despite intraocular lenses(IOLs) being the standard of care for adult cataract surgery, this issue is still somewhat controversial, particularly in young children and infants due to lack of unequivocal evidence. This review therefore summarises the findings from recent studies on the aspect of IOL implantation in pediatric eyes. Areas covered: An extensive literature search was undertaken for published articles on congenital/developmental pediatric cataracts, and IOL implantation, where literature pertinent to traumatic and subluxated cataracts was not included in the review...
January 2, 2017: Expert Review of Medical Devices
https://www.readbyqxmd.com/read/28038992/functional-and-ultrasonographic-outcomes-after-surgical-fibular-tendon-stabilisation-by-isolated-re-tensioning-of-the-superior-fibular-retinaculum
#10
C Choufani, R Rousseau, A Massein, H Pascal-Mousselard, F Khiami
BACKGROUND: Fibular tendon dislocation is a rare and usually sports-related injury. We report the functional and ultrasonographic outcomes of a simple technique for re-tensioning the superior fibular retinaculum. HYPOTHESIS: Our retinaculum re-tensioning technique is not followed by recurrent fibular tendon dislocation, as demonstrated by ultrasonography. MATERIAL AND METHOD: This single-centre single-surgeon retrospective study included 17 patients who underwent surgery to treat fibular tendon dislocation between January 2008 and December 2013...
December 27, 2016: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28018758/cervical-fracture-subluxation-in-a-patient-with-a-prior-c2-sacrum-fusion-case-report-and-review-of-literature
#11
Yi-Ren Chen, Alvin Y Chan, Kevin K Kumar, Anand Veeravagu
Traumatic injury to an adjacent segment of a previously fused spine is a rare complication of scoliosis surgery. The adjacent spinal segments may be more vulnerable to traumatic fracture or dislocation due to increased strain. We present a patient with prior C2 to sacrum fusion who suffered a C2 fracture/dislocation after falling. A 52-year-old female with a previous C2 to the sacrum fusion for idiopathic scoliosis presented with severe and progressively worsening neck pain after multiple falls. Imaging showed anterior displacement of the C2 vertebral body, fracture of C2, and anterior subluxation of the C1-2 complex on C3...
November 22, 2016: Curēus
https://www.readbyqxmd.com/read/28012078/odontoid-osteomyelitis-with-atlantoaxial-subluxation-in-an-infant
#12
Hoon Park, Hyung Kwon Byeon, Hak-Sun Kim, Jung Jun Hong, Kyung-Soo Suk
PURPOSE: To report a rare case of odontoid osteomyelitis with atlantoaxial subluxation in a 6-month-old infant. BACKGROUND: Odontoid osteomyelitis with atlantoaxial subluxation is extremely rare in children. Although several cases have been reported, there have been no studies concerning proper surgical drainage and immobilization in this disease. METHODS: A 6-month-old infant with odontoid osteomyelitis with atlantoaxial subluxation was surgically treated...
December 23, 2016: European Spine Journal
https://www.readbyqxmd.com/read/28009702/volar-dorsal-and-lateral-locking-plate-fixation-for-pilon-fractures
#13
Mark Henry
The more common dorsal fracture subluxations at the base of the middle phalanx have an intact dorsal buttress of articular surface in continuity with the shaft. Capitalizing on this foundation, various fixation methods have met with relatively equivalent success including Kirschner wires, screws only, nonlocking plate and screws, and external fixation. Pilon fractures are complete articular fractures, where the comminuted articular fragments lack any structural connection to the more distal shaft of the middle phalanx, and have largely relied upon external fixation traction systems...
December 22, 2016: Techniques in Hand & Upper Extremity Surgery
https://www.readbyqxmd.com/read/28005292/early-results-using-a-biodegradable-magnesium-screw-for-modified-chevron-osteotomies
#14
Christian Plaass, Sarah Ettinger, Lena Sonnow, Soeren Koenneker, Yvonne Noll, Andreas Weizbauer, Janin Reifenrath, Leif Claassen, Kiriakos Daniilidis, Christina Stukenborg-Colsman, Henning Windhagen
This is the first larger study analyzing the use of magnesium-based screws for fixation of modified Chevron osteotomies in hallux valgus surgery. Forty-four patients (45 feet) were included in this prospective study. A modified Chevron osteotomy was performed on every patient and a magnesium screw used for fixation. The mean clinical follow up was 21.4 weeks. The mean age of the patients was 45.5 years. Forty patients could be provided with the implant, in four patients the surgeon decided to change to a standard metallic implant...
December 2016: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28005105/hinged-knee-external-fixator-used-to-reduce-and-maintain-subacute-tibiofemoral-coronal-subluxation
#15
Erik J Geiger, Alexander H Arzeno, Michael J Medvecky
Dislocation of the knee is a rare phenomenon that is becoming increasingly recognized with the expansion of its definition to include knees presenting with multiligament compromise. Hinged external fixators are now considered a viable supplementary treatment option in the management of acute ligament repair or reconstruction but their use in the management of subacute or chronic tibiofemoral dislocations or subluxations is less well defined. We report a case of a hinged-knee external fixator used to facilitate and maintain reduction of a chronic coronal tibial subluxation that presented after repair of an acute knee dislocation with lateral ligament injury secondary to a motor vehicle accident...
November 2016: American Journal of Orthopedics
https://www.readbyqxmd.com/read/28002590/association-between-174g-c-and-572g-c-interleukin-6-gene-polymorphisms-and-severe-radiographic-damage-to-the-hands-of-mexican-patients-with-rheumatoid-arthritis-a-preliminary-report
#16
S A Zavaleta-Muñiz, L Gonzalez-Lopez, J D Murillo-Vazquez, A M Saldaña-Cruz, M L Vazquez-Villegas, B T Martín-Márquez, J C Vasquez-Jimenez, F Sandoval-Garcia, A J Ruiz-Padilla, N S Fajardo-Robledo, J M Ponce-Guarneros, A D Rocha-Muñoz, M F Alcaraz-Lopez, D Cardona-Müller, S E Totsuka-Sutto, E D Rubio-Arellano, J I Gamez-Nava
Several interleukin 6 gene (IL6) polymorphisms are implicated in susceptibility to rheumatoid arthritis (RA). It has not yet been established with certainty if these polymorphisms are associated with the severe radiographic damage observed in some RA patients, particularly those with the development of joint bone ankylosis (JBA). The objective of the present study was to evaluate the association between severe radiographic damage in hands and the -174G/C and -572G/C IL6 polymorphisms in Mexican Mestizo people with RA...
December 19, 2016: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/27992643/recall-of-the-asr-xl-head-and-hip-resurfacing-systems
#17
Werner Maurer-Ertl, Joerg Friesenbichler, Lukas A Holzer, Lukas Leitner, Kathrin Ogris, Michael Maier, Andreas Leithner
At the beginning of the 21st century, use of large-diameter, metal-on-metal devices was a popular procedure for hip replacement in young and physically active patients; however, within a few years, the number of revisions increased, resulting in a worldwide recall for the articular surface replacement (ASR) system. Complication rates for the ASR devices implanted at the authors' department are reported, with revision rates of 32% and 30% in the ASR XL Head and ASR Resurfacing groups, respectively. Reasons for revision surgery were serum metal ion elevation, luxation or subluxation, aseptic loosening, soft tissue compromise (adverse reactions to metal debris [ARMD]), and infection...
December 19, 2016: Orthopedics
https://www.readbyqxmd.com/read/27989344/a-proximal-fibularis-brevis-muscle-is-associated-with-longitudinal-split-tendons-a-cadaveric-study
#18
Stephen N Housley, James E Lewis, Deon L Thompson, Gordon Warren
The anomalous distal musculotendinous junction of the fibularis brevis muscle has been hypothesized to contribute to the development of longitudinal fibularis brevis tendon tears. Specifically, the mass effect of the low-lying fibularis brevis muscle belly was thought to increase the pressure on the superior peroneal retinaculum and increase the probability of fibularis brevis tendon subluxation. A more recent examination of the fibularis brevis tendon junction found, contrary to this hypothesis, a statistically significant association between an anomalous proximal musculotendinous junction and the prevalence of longitudinal split tears...
January 2017: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/27989338/investigation-of-the-relationship-between-flatfoot-and-patellar-subluxation-in-adolescents
#19
Yu Han, Deyu Duan, Kangcheng Zhao, Xiaohong Wang, Liu Ouyang, Guanjie Liu
Patellar subluxation is common in adolescents, and a variety of factors are related to this condition, with valgus of the knee joint an important factor. The results of many studies suggest that flatfoot can cause an abnormality of the lower limb power line. Structural abnormalities of the foot caused by the high stresses exerted by body weight can lead to structural deformity of the knee and can also cause knee valgus. Screening for foot problems can help determine the risk of patellar subluxation, and early intervention can lessen the incidence of this condition...
January 2017: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/27974819/adjacent-tooth-trauma-in-complicated-mandibular-third-molar-surgery-risk-degree-classification-and-digital-surgical-simulation
#20
Zhou-Xi Ye, Chi Yang, Jing Ge
Analysis of adjacent tooth resistance is essential in wisdom teeth extraction to prevent adjacent tooth trauma, however it lacks adequate attention nowadays. This study aims at suggesting special extraction methods based on adjacent tooth resistance analysis for prevention of adjacent tooth damage. In this study, 136 complicated mandibular third molars extracted using piezosurgery were reviewed and classified based on the adjacent teeth resistances shown in orthopantomogram (OPG) during their mesio-distal rotations: degree I refers to teeth with no adjacent teeth resistance; degree II refers to teeth with resistance released after mesial-half crown sectioning; degree III refers to teeth which still had resistance after mesial-half crown sectioning...
December 15, 2016: Scientific Reports
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