The shoulder joint is the most mobile joint in the body and consequently one of the most commonly dislocated joints.
An article published in the March 2010 issue of The Journal of Bone and Joint Surgery (JBJS) reveals that the majority of all shoulder dislocations occur during sports activities and young males are at a higher risk. The study also shows a high rate of shoulder dislocation in elderly women.
The overall incidence rate was 23.9 shoulder dislocations per 100,000 person years (the product of the number of years times the number of members of a population who have been affected by a certain condition). While this is more than double the previous rate reported for shoulder dislocations for the U.S. general population, it is still less than the rates of other common musculoskeletal injuries seen in emergency rooms, such as injuries to the lower back, knee and foot.
“Shoulder instability is one of the most common reasons young athletes see orthopaedic surgeons,” explained Brett Owens, MD, study co-author, orthopaedic surgeon at Keller Army Hospital in West Point, New York and Associate Professor at the Uniformed Services University of the Health Sciences. “However little has been reported about the incidence of this injury.”
Dr. Owens and his colleagues studied 8,940 shoulder dislocations in patients presenting to 100 hospital emergency rooms across the United States from 2002 to 2006. The purpose of the study was to identify the specific groups of individuals at risk, to help direct prevention efforts.
Of all dislocations, the study found:
In women, higher dislocation rates were seen among those aged 80 to 90 years old. This increase was mostly due to falls at home.
“We were not too surprised to find the high number of young males dislocating their shoulders during athletic activity,” commented Dr. Owens. “However, the rate of shoulder dislocations among elderly women was higher than we had previously assumed.”
The shoulder joint can dislocate forward, backward or downward. The most common shoulder dislocation happens when the shoulder slips forward (anterior instability). The arm bone is moved forward and down and out of its joint.
Dislocated shoulder symptoms include:pain;
“Individuals who dislocate their shoulders should see an orthopaedic surgeon. While not all patients require surgery, an orthopaedist can best counsel patients on the treatment options and expected outcomes,” said Dr. Owens.
Disclosure: The authors did not receive any outside funding or grants in support of their research for or preparation of this work. Neither they nor a member of their immediate families received payments or other benefits or a commitment or agreement to provide such benefits from a commercial entity.
The opinions presented by Dr Owens are his own and not the official positions of the US Army, Department of Defense, or US government.
Kristina Findlay | EurekAlert!
Study relating to materials testing Detecting damages in non-magnetic steel through magnetism
23.07.2018 | Technische Universität Kaiserslautern
Innovative genetic tests for children with developmental disorders and epilepsy
11.07.2018 | Christian-Albrechts-Universität zu Kiel
Scientists at the University of California, Los Angeles present new research on a curious cosmic phenomenon known as "whistlers" -- very low frequency packets...
Scientists develop first tool to use machine learning methods to compute flow around interactively designable 3D objects. Tool will be presented at this year’s prestigious SIGGRAPH conference.
When engineers or designers want to test the aerodynamic properties of the newly designed shape of a car, airplane, or other object, they would normally model...
Researchers from TU Graz and their industry partners have unveiled a world first: the prototype of a robot-controlled, high-speed combined charging system (CCS) for electric vehicles that enables series charging of cars in various parking positions.
Global demand for electric vehicles is forecast to rise sharply: by 2025, the number of new vehicle registrations is expected to reach 25 million per year....
Proteins must be folded correctly to fulfill their molecular functions in cells. Molecular assistants called chaperones help proteins exploit their inbuilt folding potential and reach the correct three-dimensional structure. Researchers at the Max Planck Institute of Biochemistry (MPIB) have demonstrated that actin, the most abundant protein in higher developed cells, does not have the inbuilt potential to fold and instead requires special assistance to fold into its active state. The chaperone TRiC uses a previously undescribed mechanism to perform actin folding. The study was recently published in the journal Cell.
Actin is the most abundant protein in highly developed cells and has diverse functions in processes like cell stabilization, cell division and muscle...
Scientists have discovered that the electrical resistance of a copper-oxide compound depends on the magnetic field in a very unusual way -- a finding that could help direct the search for materials that can perfectly conduct electricity at room temperatur
What happens when really powerful magnets--capable of producing magnetic fields nearly two million times stronger than Earth's--are applied to materials that...
08.08.2018 | Event News
27.07.2018 | Event News
25.07.2018 | Event News
15.08.2018 | Physics and Astronomy
15.08.2018 | Earth Sciences
15.08.2018 | Physics and Astronomy