scholarly journals Morphological and Apparent‐Level Stiffness Variations Between Normal and Osteoarthritic Bone in the Humeral Head

2019 ◽  
Vol 38 (3) ◽  
pp. 503-509
Author(s):  
Nikolas K. Knowles ◽  
Jonathan Kusins ◽  
Melanie P. Columbus ◽  
George S. Athwal ◽  
Louis M. Ferreira
Keyword(s):  
Humeral Head ◽  
Apparent Level

Successful Treatment of Congenital Shoulder Luxation in a Dog by Closed Pinning

1994 ◽  
Vol 07 (04) ◽  
pp. 170-172 ◽  
Author(s):  
R. A. Read
Keyword(s):  
Early Diagnosis ◽  
Successful Treatment ◽  
Humeral Head ◽  
One Year

Congenital shoulder luxation in the dog is commonly associated with deformity of the humeral head and glenoid, making reduction and stabilization difficult. Early diagnosis of congenital luxation of the shoulder in a Papillon made it possible to successfully reduce and stabilize the luxation using a closed pinning technique. One year later the joint was functionally and radiographically normal.

Interaction of H2O, O2 and H2 with Proton Conducting Oxides Based on Lanthanum Scandates

2019 ◽  
pp. 88-100
Author(s):  
A. S. Farlenkov ◽  
N. A. Zhuravlev ◽  
Т. A. Denisova ◽  
М. V. Ananyev
Keyword(s):  
Water Vapor ◽  
Partial Pressure ◽  
Gas Phase ◽  
Molecular Hydrogen ◽  
Proton Magnetic Resonance ◽  
Partial Pressure Of Oxygen ◽  
Proton Conducting ◽  
Conducting Oxides ◽  
Temperature Range ◽  
Apparent Level

The research uses the method of high-temperature thermogravimetric analysis to study the processes of interaction of the gas phase in the temperature range 300–950 °C in the partial pressure ranges of oxygen 8.1–50.7 kPa, water 6.1–24.3 kPa and hydrogen 4.1 kPa with La1–xSrxScO3–α oxides (x = 0; 0.04; 0.09). In the case of an increase in the partial pressure of water vapor at a constant partial pressure of oxygen (or hydrogen) in the gas phase, the apparent level of saturation of protons is shown to increase. An increase in the apparent level of saturation of protons of the sample also occurs with an increase in the partial pressure of oxygen at a constant partial pressure of water vapor in the gas phase. The paper discusses the causes of the observed processes. The research uses the hydrogen isotope exchange method with the equilibration of the isotope composition of the gas phase to study the incorporation of hydrogen into the structure of proton-conducting oxides based on strontium-doped lanthanum scandates. The concentrations of protons and deuterons were determined in the temperature range of 300–800 °C and a hydrogen pressure of 0.2 kPa for La0.91Sr0.09ScO3–α oxide. The paper discusses the role of oxygen vacancies in the process of incorporation of protons and deuterons from the atmosphere of molecular hydrogen into the structure of the proton conducting oxides La1–xSrxScO3–α (x = 0; 0.04; 0.09). The proton magnetic resonance method was used to study the local structure in the temperature range 23–110 °C at a rotation speed of 10 kHz (MAS) for La0.96Sr0.04ScO3–α oxide after thermogravimetric measurements in an atmosphere containing water vapor, and after exposures in molecular hydrogen atmosphere. The existence of proton defects incorporated into the volume of the investigated proton oxide from both the atmosphere containing water and the atmosphere containing molecular hydrogen is unambiguously shown. The paper considers the effect of the contributions of the volume and surface of La0.96Sr0.04ScO3–α oxide on the shape of the proton magnetic resonance spectra.

Subluxation of the humeral head associated with hemarthrosis in a patient with hemophilia.

1991 ◽  
Vol 157 (3) ◽  
pp. 648-648 ◽  
Author(s):  
W H McCuskey
Keyword(s):  
Humeral Head

scholarly journals Factors related to large bone defects of bipolar lesions and a high number of instability episodes with anterior glenohumeral instability

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Noboru Matsumura ◽  
Kazuya Kaneda ◽  
Satoshi Oki ◽  
Hiroo Kimura ◽  
Taku Suzuki ◽  
...  
Keyword(s):  
Humeral Head ◽  
Glenohumeral Joint ◽  
Three Dimensional ◽  
Clinical Results ◽  
Bone Defects ◽  
Symptom Duration ◽  
Glenohumeral Instability ◽  
Explanatory Variables ◽  
Large Bone ◽  
Large Bone Defects

Abstract Background Significant bone defects are associated with poor clinical results after surgical stabilization in cases of glenohumeral instability. Although multiple factors are thought to adversely affect enlargement of bipolar bone loss and increased shoulder instability, these factors have not been sufficiently evaluated. The purpose of this study was to identify the factors related to greater bone defects and a higher number of instability episodes in patients with glenohumeral instability. Methods A total of 120 consecutive patients with symptomatic unilateral instability of the glenohumeral joint were retrospectively reviewed. Three-dimensional surface-rendered/registered models of bilateral glenoids and proximal humeri from computed tomography data were matched by software, and the volumes of bone defects identified in the glenoid and humeral head were assessed. After relationships between objective variables and explanatory variables were evaluated using bivariate analyses, factors related to large bone defects in the glenoid and humeral head and a high number of total instability episodes and self-irreducible dislocations greater than the respective 75th percentiles were evaluated using logistic regression analyses with significant variables on bivariate analyses. Results Larger humeral head defects (P < .001) and a higher number of total instability episodes (P = .032) were found to be factors related to large glenoid defects. On the other hand, male sex (P = .014), larger glenoid defects (P = .015), and larger number of self-irreducible dislocations (P = .027) were related to large humeral head bone defects. An increased number of total instability episodes was related to longer symptom duration (P = .001) and larger glenoid defects (P = .002), and an increased number of self-irreducible dislocations was related to larger humeral head defects (P = .007). Conclusions Whereas this study showed that bipolar lesions affect the amount of bone defects reciprocally, factors related to greater bone defects differed between the glenoid and the humeral head. Glenoid defects were related to the number of total instability episodes, whereas humeral head defects were related to the number of self-irreducible dislocations.

scholarly journals The Histopathology of the Humeral Head in Glenohumeral Osteoarthritis

2021 ◽  
pp. 100147
Author(s):  
A.P. Matson ◽  
Z. Kunkel ◽  
V.A. Bernal-Crespo ◽  
A. Chainani ◽  
M. Chainani ◽  
...  
Keyword(s):  
Humeral Head ◽  
Glenohumeral Osteoarthritis

Factors Influencing the Varus Deformity of Humeral Head in Proximal Humerus Fractures and Its Relation to Functional Outcome

2021 ◽  
Author(s):  
H. Kantharaju ◽  
Sangeet K. Gawhale ◽  
G. S. Prasanna Kumar ◽  
Balu Sahare ◽  
Nadir Shah
Keyword(s):  
Functional Outcome ◽  
Humeral Head ◽  
Proximal Humerus ◽  
Varus Deformity ◽  
Proximal Humerus Fractures ◽  
Factors Influencing ◽  
Humerus Fractures

Osteochondritis dissecans of the humeral head in two small‐breed dogs

2013 ◽  
Vol 1 (1) ◽  
Author(s):  
M. Bruggeman ◽  
D. Van Vynckt ◽  
B. Van Ryssen ◽  
G. Bolln ◽  
K. Chiers ◽  
...  
Keyword(s):  
Osteochondritis Dissecans ◽  
Humeral Head ◽  
Small Breed

Prevalence of hip dysplasia, elbow dysplasia and humeral head osteochondrosis in dog breeds in Belgium

2008 ◽  
Vol 163 (22) ◽  
pp. 654-658 ◽  
Author(s):  
F. Coopman ◽  
G. Verhoeven ◽  
J. Saunders ◽  
L. Duchateau ◽  
H. Van Bree
Keyword(s):  
Humeral Head ◽  
Hip Dysplasia ◽  
Elbow Dysplasia

Precision of novel radiological methods in relation to resurfacing humeral head implants: assessment by radiostereometric analysis, DXA, and geometrical analysis

2012 ◽  
Vol 132 (11) ◽  
pp. 1521-1530 ◽  
Author(s):  
Maiken Stilling ◽  
Inger Mechlenburg ◽  
Anders Amstrup ◽  
Kjeld Soballe ◽  
Thomas Klebe
Keyword(s):  
Humeral Head ◽  
Radiostereometric Analysis ◽  
Geometrical Analysis ◽  
Radiological Methods
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