Data Trace Editor THR menu acetabular component posterior column fracture Discussion (see also: classfication and bone graft options) condition in which superior aspect of pelvis is separated from inferior aspect because of bone loss or a fracture through acetabulum; most discontinuities represent unhealed transverse acetabular fractures which occurr through areas of pelvic bone loss; in the study by … Read more
THR menu acetabular component revision acetabular component Socket (Hip Center) Location if opposite hip is normal, it may be used as a template; normal hip center should be restored when possible (this will reduce joint reactive forces); generally the the component is placed as far medially and as far inferiorly as possible; management of superior … Read more
THR menu / Revision THR acetabular component Discussion note that some of the problems seen in dysplasia are frequently encountered in revision THR; indications for acetabular revision: sepsis, component malposition, impingement, polyethylene wear, pelvic osteolysis, recurrent dislocation, progressive protrusio, and component loosening; evaluation of the painful THR examination: examination for loosening previoius incisions; contracture of … Read more
Discussion restoration of normal hip center in acetabular reconstruction encourages restoration of normal biomechanics; placing the socket laterally creates increased joint reactive force, and placing it directly superior requires the use of a long neck prosthesis to restore abductor moment arm; long neck prosthesis will develop increased lateral bending stresses, adapting to the activities of … Read more
(see also: acetabular component Loosening of Press Fit Acetabular Components (press fit acetabular components) normal bone ingrowth generally for bone ingrowth to occur, the component must lie with 50 micrometers of the acetabulum, inorder for host bone ingrowth to occur; as noted by Bloebaum RD, et al (1997), bone ingrowth into component averages only 12%, … Read more
Discussion accessory navicular is an accessory ossicle of the foot which is located on the medial side of foot, proximal to the navicular and in continuity with the tibialis posterior tendon; approximately 2-12% of people may have this ossicle; accessory navicular generally does not ossify until 9 years of age, and in about one half … Read more
most common accessory bones os trigonum os tibiale externum (accessory navicular) os peroneum (lateral aspect of cuboid) os vesalianum (base of 5th metatarsal) less common accessory bones os supratalare (antero-supero aspect of talus) os supranaviculare (superior aspect of navicular – seen on lateral) processus uncinatus (at intersection of navicula, 2nd and 3rd cuniform) os intercuneiforme … Read more
(see also: Technique of Reduction) Discussion initial considerations angular / rotational deformity: (growth will not correct rotational deformity) age distance from physis direction of angulation amount of deformity bayonette apposition generally bayonette opposition will require operative reduction (either closed with a Kapandji K wire levering technique or in some situations, an open reduction and fixation … Read more
Discussion tears of AC & CC ligaments (from fall on tip of shoulder) allows upper limb to drop away from clavicle, producing separation of AC joint; diff dx distal clavicular physeal separation childhood equivolent of AC separation; atraumatic AC joint laxity (from ligamentous laxity) Classification Rockwood Classification type I sprain of joint with out a … Read more
Discussion general discussion: clinical and radiographic findings Surgical Technique Subacromial Decrompression Arthroscopic Distal Clavicle Excision: Open Clavicle Excision: Surgical Technique: Modified Weaver Dunn Procedure: Complications lateral elevation of the clavicle: lateral elevation is often associated w/ pain; ref: Sequential Resection of the Distal Clavicle and Its Effects on Horizontal Acromioclavicular Joint Translation references: Complications after … Read more