Hemiarthroplasty for Fracture Design Rationale and Surgical Technique Reza Omid, M.D. Assistant Professor Orthopaedic Surgery Shoulder & Elbow Reconstruction Sports Medicine Keck School of Medicine of USC Disclosures JBJSAm (Editorial Board) Smith & Nephew (Consultant) Integra (Consultant) DeRoyal (Consultant) Optimal Treatment • UNKOWN???? • JSES 2011: 1118-1124 (RCT ORIF vs Non-op) • JSES 2011: 747-55 (RCT ORIF vs Non-op • JSES 2011: 1025-1033 (RCT Hemi vs Non-op) • JOT 2011 (RCT ORIF vs Non-op) Hemiarthroplasty • Older Patients • Osteopenic Bone • Fracture-Dislocations – > 40% Impression Defect Hemiarthroplasty Technique Patient Position Surgical Technique Extended deltopectoral exposure: deltoid origin and insertion intact Proximal Humerus Fracture Parts Surgical Technique Identify the LHB and Tuberosities Evaluate the rotator cuff injury Surgical Technique Remove the humeral head Evaluate the glenoid Tuberosity Suture Technique Place suture at the tendon bone interface Head Size Solutions –removed head is guide »thickness > radius –error towards undersize –check gross appearance Position of Greater Tuberosity Height Relative to Humeral Head Surgical Technique Assess the humeral height and version Trial tuberosity reduction Mark the stem position 5-8 mm Height of the Greater Tuberosity Lesser Tuberosity Benefits of Titan System Press fit fracture No jig needed for stabilizing trials Varying body heights to dial in correct humeral head height Primary Proximal Bodies Small Head Options Head Size Spherical Ø 38x14* 40x15* 42x16 44x16 44x19 46x14 46x17 46x20 48x15 48x18 48x21 50x19 50x22 52x20 41 43 45 48 45 54 49 47 56 51 49 53 51 55 *Eccentric Only Glenoid Options Standard Large Press-fit Stems ***Any size primary or fracture body can be used with any size press fit or cemented stem Tuberosity Height = Prosthetic Height 5-8 mm Height of the Greater Tuberosity Lesser Tuberosity Determining Height –Superior border of Pectoralis tendon (5.6cm±0.5cm) –Side to Side comparison (x-ray) –View calcar contour (gothic arch) Determining Height Proximal Humerus Fracture Humeral Version Version Effect of Incorrect Version Too Anteverted Too Retroverted Biceps Groove Version Groove shifts medially from proximal to distal, changing retroversion values 15.9° from the upper to lower part of the bicipital groove Surgical Technique Prepare the fixation sutures for ORIF of the tuberosities. – 2-3 vertical and 2 horizontals, one medial one lateral Surgical Technique Tuberosity fixation and bone graft Biceps tenodesis Wound drains and closure Surgical Technique 4 Part Fracture Repair Factors Affecting Outcome • • • • Bone density Rotator cuff tissue quality Tuberosity healing Restoration of anatomic humeral head height • Restoration of anatomic humeral version • Rehabilitation Reverse for Fracture • Age >70-75 (I will consider for age >65) • Tuberosities heal more predictably and function is not as dependent on tuberosity healing • More predictable outcome than with hemi • Best outcome of a hemi is better than best outcome of a reverse Thank You