Revision humeral head prosthesis

Indications Humeral or glenohumeral prosthesis for glenohumeral OA, rheumatoid arthritis, osteonecrosis with good bone stock and functional rotator cuff. PRINCIPLES • Humeral and glenoid implants suited to minimally-invasive surgery • Two-thirds of humeral head is resected to provide easy access to the glenoid • Prosthetic buried(1) glenoid, sits flush with glenoid bone surface • Revision possible with anatomic and reversed prosthesis • Choice of hemi-arthroplasty or total shoulder prosthesis depending on the patient’s anatomy FEATURES • Cementless humeral cap available in 8 diameters: – keel length increases with implant size; 4 sharp antirotation spurs – Porocoat® pure titanium porous coating and hydroxyapatite – requires removal of 2/3 of the humeral head • Cementless buried glenoid available in 2 diameters (14 mm and 18 mm): – consists of a polyethylene insert that is snapped into a metal base (components are supplied pre-assembled) – incorporated into cancellous bone by 3 peripheral fins on the insert and split peg on the press-fit metal base – Porocoat® coating on base like that of the humeral cap MATERIALS • Humeral cap: cobalt-chrome (ISO5832-4 or ISO5832-12) • Buried glenoid metal base: titanium alloy (ISO5832-3) • Insert for buried glenoid: ultra-high molecular weight polyethylene (ISO5834-1 and 5834-2) • Porocoat® pure titanium porous coating and hydroxyapatite on the humeral cap and buried glenoid base (per manufacturer’s specifications and applicable standards)