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Topic: Acromioclavicular joint

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acromioclavicular joint

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	The Physician and Sportsmedicine: Acromioclavicular Joint Injuries
		The AC joint suspends the arm from the axial skeleton and transmits force from the upper arm to the rest of the skeleton.
		Injection of the AC joint is performed from a superior approach using a 23- or 25-gauge needle (figure 3: not shown) with 1 mL of local anesthetic mixed with 1 mL of an intermediate- or long-acting corticosteroid.
		DePalma AF: The role of the disks of the sternoclavicular and the acromioclavicular joints.
	www.physsportsmed.com /issues/2001/11_01/johnson.htm (2310 words)

	Acromioclavicular joint - Wikipedia, the free encyclopedia
		The left shoulder and acromioclavicular joints, and the proper ligaments of the scapula.
		The acromioclavicular joint, or AC joint, is a joint at the top of the shoulder.
		The acromioclavicular ligament, which attaches the clavicle to the acromion of the scapula.
	en.wikipedia.org /wiki/Acromioclavicular_joint (327 words)

	Acromioclavicular Joint: AC Joint
		The shoulder joint is formed at the junction of three bones: the collarbone (clavicle), the shoulder blade (scapula), and the arm bone (humerus).
		The end of the scapula is called the acromion, and the joint between this part of the scapula and clavicle is called the acromioclavicular joint.
		The ligaments that hold the joints together are the acromioclavicular, coracoacromial and coracoclavicular (trapezoid and conoid) ligaments.
	www.physioworks.com.au /acromioclavicular.joint.strain.htm (758 words)

	Acromioclavicular Joint Arthroscopy
		The AC joint is an oval shaped synovial lined articulation of the medial concave acromion and the lateral convex end of the clavicle.
		The joint is stabilized by thick and strong superior and weaker inferior capsular thickenings, the AC ligaments.
		Meyers JE Arthroscopic debridement of the acromioclavicular joint and distal Clavicle Resection.
	www.orthonet.on.ca /shoulderscope/acj_arthroscopy.htm (3865 words)

	Acromioclavicular joint injuries \| separation \| sprain
		Acromioclavicular joint injuries most commonly occur in athletic young adults involved in collision sports, throwing sports, and overhead activities such as upper-extremity strength training.
		The acromioclavicular ligaments contribute approximately two-thirds of the constraining force to superior and posterior displacement; however, with greater displacement the coracoclavicular ligaments contribute the major share of the resistance.
		The acromioclavicular ligament is sprained with an intact coracoclavicular ligament.
	www.sportsinjurybulletin.com /archive/acromioclavicular.html (2031 words)

	Acromioclavicular (AC) Joint (Site not responding. Last check: 2007-10-03)
		The acromioclavicular (AC) joint is located at the end of the clavicle (collar bone) toward the shoulder.
		When this joint is disrupted, it is called a shoulder separation (also called an acromioclavicular joint separation, or AC separation).
		The acromioclavicular (AC) joint may be felt at the end of the collar bone.
	www.shoulderphysician.net /ac_joint.htm (564 words)

	Assessment and Management of the Painful Shoulder
		The glenohumeral joint is responsible for the majority of motion in the coronal plane.
		The acromioclavicular joint is a diarthrodial joint whose articular surfaces are covered with hyaline cartilage, interposed with a fibrocartilaginous disk.
		Typically, calcifications in the acromioclavicular ligament and anterior acromial spur formation are the cause of impingement, which may or may not be associated with tears of the rotator cuff.
	www.ncpainmanagement.com /AssessmentPainfulShoulder.htm (3820 words)

	Acromioclavicular Joint Reconstruction Using Gore-Tex Tape
		The AC joint is formed by the lateral end of the clavicle and acromion process of the scapula, and has a cartilaginous intraarticular disc.
		The AC joint is stabilized by two separate ligamentous structures: the AC ligament and the scapuloclavicular ligaments.
		The most frequent mechanism of injury to the AC joint is a fall or a sharp blow on the acromion process which forces the scapula and the arm downward while the clavicle, locked by the ribs, is then pushed upward.
	www.stoneclinic.com /acjoint2.htm (3372 words)

	eMedicine - Acromioclavicular Joint Injury : Article by L Edward Seade
		The AC joint is located at the top of the shoulder where the acromion process and the clavicle meet to form a joint.
		Several ligaments surround this joint and depending on the severity of the injury, a person may tear one or all of the ligaments.
		Acromioclavicular (AC) joint injuries are painful and the patient often lacks full range of motion after the injury.
	www.emedicine.com /sports/topic3.htm (3403 words)

	ACROMIOCLAVICULAR JOINT SEPARATION
		A shoulder separation is actually a dislocation of the acromioclavicular (AC) joint, the joint between the scapula (shoulder blade) and the clavicle (collarbone).
		The joint where the acromion and the clavicle join is known as the acromioclavicular (AC) joint.
		If the ligaments around the joint are torn and the ligaments that attach the clavicle to the coracoid process, the injury results in a obvious bump on the shoulder (Grade 3).
	www.muir-orthopedic.com /patient_ed_docs/ajs_pe_doc.htm (680 words)

	AC Joint Injuries - Children's Hospital Boston
		The AC (acromioclavicular) joint is a joint in the shoulder where the collarbone (clavicle) meets the shoulder blade (scapula).
		This is in contrast to the glenohumeral joint, the main ball and socket shoulder joint.
		The most common problems that occur at the AC joint are arthritis, fractures and "separations." Arthritis is a condition characterized by loss of cartilage in the joint.
	www.childrenshospital.org /az/Site549/printerfriendlypageS549P0.html (735 words)

	Acromioclavicular Joint (ACJ) (Site not responding. Last check: 2007-10-03)
		This joint is located at the end of the clavicle (collar bone) at the top of the shoulder.
		The joint can sustain a range of inuries from a sprain (which hurts but with little deformity) to a full dislocation (which hurts more and has an obvious deformity).
		Injections of local anaesthetic into the tissues near the joint (the sub-acromial bursa) or the joint itself may be used.
	www.tennent.net /html/info/shc-acjointcond.htm (478 words)

	Biomechanical study of the ligamentous system of the acromioclavicular joint (Site not responding. Last check: 2007-10-03)
		The ligamentous structures of the acromioclavicular joint were studied by gross examination and quantitative measurement in twelve human cadaver specimens.
		The acromioclavicular ligament acted as a primary constraint for posterior displacement of the clavicle and posterior axial rotation.
		For many directions of displacement, the acromioclavicular joint contributed a greater amount to constraint at smaller degrees of displacement, while the coracoclavicular ligaments, primarily the conoid ligament, contributed a greater amount of constraint with larger amounts of displacement.
	www.worldortho.com /database/abstracts/u_limb/fukuda.html (234 words)

	Joint - Wikipedia, the free encyclopedia
		In fibrous joints bones are joined by tight and inflexible layers of dense connective tissue, consisting mainly of collagen fibers.
		Gomphoses, the joints between the roots of the teeth and their sockets (or alveoli) and in maxilla and mandible.
		Examples of cartilaginous joints are the pubic symphysis, the joints between the ribs and the sternum, and the cartilage connecting the growth regions of immature long bones.
	en.wikipedia.org /wiki/Joint (426 words)

	Shoulder27 (Site not responding. Last check: 2007-10-03)
		Instability of the acromioclavicular joint, or shoulder separation, is a common injury.
		Arthritis of the acromioclavicular joint may occur after an acromioclavicular separation or as the result of excessive weight training, especially bench pressing exercises.
		Corticosteroid injection into the joint may relieve symptoms, but resection of a small amount of the distal clavicle often is needed.
	www.glaciermedicaled.com /Shoulder/27acseparation.html (697 words)

	Orthopaedic appliance for use in treating acromioclavicular joint injuries - Patent 4589406
		The acromioclavicular joint, or A-C joint as it is sometimes called, connects the distal end of the clavicle with the underlying acromion which overlies the upper end of the humerus, or upper arm.
		A dislocation, or separation, is defined as an injury to a joint involving rupture of the ligaments and dislocation of the joint.
		Yet another object of the present invention is to provide an acromioclavicular joint restoration splint and method of using the same to treat a wide variety of degrees of injury to the acromioclavicular joint without the need for surgery.
	www.freepatentsonline.com /4589406.html (4633 words)

	Caring Medical - Symptoms - Acromioclavicular (AC) joint arthrosis
		Acromioclavicular (AC) joint arthrosis is a common degenerative disorder that can lead to pain and difficulty during everyday use of the shoulder.
		In addition, the AC joint is particularly prone to the development of osteoarthritis during middle age.
		During the early stages, AC joint arthrosis usually manifests itself with tenderness and pain in the front of the shoulder around the joint.
	www.caringmedical.com /symptoms/condition.asp?condition_id=982 (465 words)

	MR Imaging Appearance and Classification of Acromioclavicular Joint Injury -- Antonio et al. 180 (4): 1103 -- American ...
		Acromioclavicular and coracoclavicular ligaments are disrupted, and lateral end of clavicle is posteriorly displaced.
		joint injury is calcification or ossification of the coracoclavicular
		Functional evaluation of the ligaments at the acromioclavicular joint during anteroposterior and superoinferior translation.
	www.ajronline.org /cgi/content/full/180/4/1103 (2364 words)

	[No title]
		It is a diarthrodial joint formed by the distal clavicle and medial facet of the acromion.
		The primary functions of the AC joint are to transmit force from the appendicular skeleton (upper extremity) to the axial skeleton (trunk) and to suspend the upper extremity.
		The acromioclavicular joint becomes injured or dislocated when a large force is applied to the acromion when the arm is in an adducted position, for example, during a wrestling takedown or a tackle in football.
	www.chicagosportsmedicine.com /acromioclavicular_joint_wrestling.htm (443 words)

	The Physician and Sportsmedicine: What to Do About AC Joint Injuries
		he muscles, joints, and bones of the shoulders form a base of support that allows your arms to swing, lift, or throw (figure 1).
		The AC joint is not the shoulder joint.
		The shoulder joint is where the bone of the upper arm (humerus) meets a shallow socket that is also part of the shoulder blade.
	www.physsportsmed.com /issues/2001/11_01/johnson_pa.htm (587 words)

	Disruption to the acromioclavicular joint (Site not responding. Last check: 2007-10-03)
		The superior and inferior borders of the distal clavicle should be in alignment with the corresponding borders of the acromion.
		In this film there is a dislocation of the joint with the inferior border of the clavicle aligning with the superior border of the acromion, suggesting a Grade 3 injury.
		The stability of the acromio-clavicular joint is dependent upon the ligaments that surround it.
	www.edu.rcsed.ac.uk /photoalbum/ph58.htm (188 words)

	Dislocation of the acromioclavicular joint. An end-result study (Site not responding. Last check: 2007-10-03)
		The cases of 127 patients who had an acute dislocation of the acromioclavicular joint were studied.
		Using a rating system that included subjective, objective, and roentgenographic criteria, it did not appear that reduction of the acromioclavicular joint was necessary to obtain consistently good results.
		In patients who had persistent pain and stiffness of the acromioclavicular joint, or in whom symptomatic post-traumatic arthritis developed, resection of the distal part of the clavicle reliably produced significant improvement.
	www.worldortho.com /database/abstracts/u_limb/taft.html (152 words)

	John S. Rogerson, Orthopaedic Surgeon - Advanced Arthroscopy - Acromioclavicular Joint Arthroscopy and Distal Clavicle ...
		The joint is stabilized by thick and strong superior and weaker inferior capsular thickenings—the AC ligaments.
		AC joint impingement, however, has become a popular radiographic diagnosis and needs to be carefully correlated with the patient’s clinical picture lest premature distal clavicle resection be performed.
		The AC joint position and inclination is exactly determined with three 22-gauge needles, and the joint is distended with normal saline.
	www.orthorogerson.com /pubAdvArthroAC.htm (4165 words)

	SCOI Presents The AC Joint
		The joint formed where the acromion connects to the collar bone or clavicle is the AC joint.
		This joint, like most joints in the body, has a cartilage disk or meniscus inside and the ends of the bones are covered with cartilage.
		The joint is held together by a capsule, and the clavicle is held in the proper position by two heavy ligaments called coracoclavicular ligaments.
	www.scoi.com /acjoint.htm (857 words)

	Biology of the Shoulder-AC joint (Site not responding. Last check: 2007-10-03)
		Also, the AV joint allows for the transmission of force from the upper arm to the rest of the skeleton.
		The AC joint is a joint that is formed between the clavicle and the scapula.
		The acromioclavicular ligament is the ligament that directly connects the acromion to the clavicle and covers the joint.
	biomed.brown.edu /Courses/BI108/BI108_2004_Groups/Group01/bioacj.htm (347 words)

	The Department of Orthopaedic Surgery
		Like most joints in the body where bones meet, there is cartilage between the two bones, which the white tissue between bones that allows them to move on each other, like teflon on two ball bearings.
		Arthritis is a condition characterized by loss of cartilage in the joint, which is essentially wear and tear of the smooth cartilage which allows the bones to move smoothly.
		AC joint wear and tear is common in weight lifters, especially with the bench press and to a lesser extent military press.
	www.hopkinsmedicine.org /orthopedicsurgery/acjoint.html (1512 words)

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