April 22, 2010
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MID-AMERICA ORTHOPAEDIC ASSOCIATION 28 th Annual Meeting April 21-25, 2010 Hyatt Regency Lost Pines Resort and Spa Lost Pines (Austin), Texas NOTE: Disclosure information is listed at the end of this document. ------------------------------------------------------------------------------------------------------------------------------- MAOA FIRST PLENARY SESSION April 22, 2010 1. Patient Perceptions of Surgeon-Industry Relations Scott C. McGovern, M.D. Salisbury, MD *Robert T. Trousdale, M.D. Rochester, MN Bradford L. Currier, M.D. Rochester, MN INTRODUCTION: Little information is available on patients’ perceptions of physician-industry relationships identifying any differing views between surgical and nonsurgical patients. METHODS: Two groups of surgical patients representing primary total joint arthroplasty and instrumented spinal surgery were randomly selected from all primary THAs and TKAs or instrumented spinal fusions performed between 2003 and 2007. These were matched with cohorts of nonsurgical patients with correlating diagnoses. A comprehensive survey was sent; mailing response rate was 45%. We obtained 404 usable survey responses for matched cohorts. RESULTS: Survey responders were a mean age of 66 years and 51% were males. 93% agree or strongly agree that it is beneficial for doctors to advise the manufacturers of medical devices. 92% trust their doctor to do what is best for the patient. 82% agree that doctors should receive payment for designing implants, but 40% believe doctors should receive financial reimbursement for an advisory role. 71% agree that doctors should disclose a financial or advisory relationship. Only 27% agree that surgeon choice of implant is influenced by financial reimbursement. Nonsurgical groups respond more strongly that surgeon industry relationships increase the cost of medical care. Surgical patients were more inclined to allow doctors to make the sole choice of implants and were significantly less in favor of the patient choosing the implant. 7% believe that hospitals or insurers should have sole choice of implant. 89% believe the outcome of surgery is affected by the choice of implant. CONCLUSIONS: The vast majority of patients surveyed believe that surgeon-industry relations are beneficial and appropriate. A large majority of patients believe that implant choice is not influenced by financial reimbursement, but surgeons should disclose any financial or advisory relationship. Most believe that implant choice affects the outcome of their surgery, and that neither hospitals nor insurers should have sole choice of implants. Age, gender, education, employment in healthcare, and prior surgery did not significantly alter these perceptions. 2. Minimum 20-Year Follow-Up of Rotating Platform Mobile Bearing TKR John J. Callaghan, M.D. Iowa City, IA *Christopher Wells, B.S. Iowa City, IA Steve S. Liu, M.D. Iowa City, IA Devon D. Goetz, M.D. West Des Moines, IA Richard C. Johnston, M.D. Iowa City, IA INTRODUCTION: The purpose of this study was to evaluate the minimum 20-year follow-up of a single surgeon consecutive series study of total knee replacements performed with a rotating platform design. METHODS: 119 consecutive total knee arthroplasties were performed in 86 patients and were followed for a minimum of 20 years. Average age of the patients was 70 years (range 37-88). 34 patients were males and 52 were females. At minimum 20-year follow-up, 20 patients (26 knees) were known to be living, 64 patients (91 knees) were deceased, 1 patient (1 knee) was lost to follow-up, and 1 patient (1 knee) refused to participate. The living patients were evaluated clinically for the need of revision and with the Knee Society Score, the Hospital for Special Surgery Score, and the WOMAC Score. Radiographs were evaluated for loosening and osteolysis. RESULTS: No knee had a revision of an implant. Two knees required reoperation for periprosthetic fracture without revision of the components. One additional knee required a liner exchange for hematogenous infection. One knee has demonstrated radiographic loosening of the femoral component. Over the 20-year follow-up, six knees have demonstrated osteolysis, two of which were extensive. Clinically, the average KSS were 89 (clinical) and 67 (functional), the average HSS score was 80, and the average scaled WOMAC score was 19. CONCLUSIONS: Considering that gamma irradiated in air polyethylene was utilized in these cases, the durability of this cohort of TKRs has been excellent. These results have encouraged us to continue the use of mobile bearing knee replacements. 3. Return to Sports Following Total Hip Arthroplasty in Young Active Patients *Ryan M. Nunley, M.D. St. Louis, MO Erin Ruh, M.S. St. Louis, MO Craig J. Della Valle, M.D. Chicago, IL Javad Parvizi, M.D. Philadelphia, PA C. Anderson Engh, Jr., M.D. Alexandria, VA Michael E. Berend, M.D. Mooresville, IN John C. Clohisy, M.D. St. Louis, MO Robert L. Barrack, M.D. St. Louis, MO THA is being performed in younger, more active patients. The purpose of this study was to determine the participation of patients in their preferred sport(s) prior to surgery and return to that sport following primary THA. A retrospective review of patients aged 18-60 who underwent primary THA due to non- inflammatory arthritis over a four-year period at five investigational sites was completed. Data was collected via administration of a telephone questionnaire by an independent third party survey center. Data was collected on 710 consecutive primary THA patients with preoperative UCLA activity score of > 6 and minimum 1 year follow-up. 63.1% were males; 36.9% were females with an average age of 49.4 years; average length of follow-up was 2.4 years. Patients were asked to list their top two most important sporting activities they had to limit prior to undergoing THA surgery. Walking and running/jogging were the activities most commonly engaged in by patients pre- and postoperatively, followed by golf, biking, basketball, and racquet sports. 557 patients (78.45%) participated in some form of recreational activity preoperatively and 374 (67.15%) of those patients have participated in at least one of their two preferred activities in the last 30 days. 504 patients (70.98%) have tried to run at least some distance since surgery while 92 patients (12.95%) are routinely running for exercise, and run an average of 5.6 miles per week. Most young, active patients who participated in some type of sporting activity prior to primary THA returned to their preferred sport after surgery. 4. Revision Total Shoulder Arthroplasty for Painful Glenoid Arthrosis Following Humeral Head Replacement *Adam A. Sassoon, M.D. Rochester, MN Peter C. Rhee, D.O. Rochester, MN Cathy D. Schleck, B.S. Rochester, MN William S. Harmsen, M.S. Rochester, MN John W. Sperling, M.D. Rochester, MN Robert H. Cofield, M.D. Rochester, MN BACKGROUND: Primary humeral head replacement (HHR) is an option in the treatment of traumatic and non-traumatic glenohumeral arthritis. An unfortunate subset of patients, treated with HHR, will require revision to total shoulder arthroplasty (TSA) following the development of progressive glenoid arthrosis. This study seeks to characterize the outcomes of revision TSA for glenoid arthrosis in patients with an existing HHR. METHODS: One hundred and two HHRs in 101 patients that were revised to a TSA in the treatment of glenoid arthrosis were retrospectively reviewed. All patients in this study had their revision TSA performed by the senior author, RHC, between 1981 and 2005 and had a minimum of two years clinical follow-up. Revision procedures were separated into a traumatic and a non-traumatic group for analysis, depending on whether their index HHR was performed secondary to a fracture of the humerus. RESULTS: Fifty-six women and 46 men, with a mean age of 57 (ranging from 23 to 82), underwent a revision TSA for glenoid arthrosis following a HHR. The average time that elapsed between the index HHR and the revision TSA was 4 years (range 0.5 to 17 years). The mean follow-up for these patients was 7 years (ranging from 3 months to 20 years). Pain scores for all patients decreased from 4.3 to 2.6 (p<0.001). Mean abduction was increased from 79.7 ° to 104.9 °, mean external rotation was increased from 31.7 ° to 47.9 ° (p<0.001), and mean internal rotation was unchanged. Modified Neer score results for all patients yielded 23 (22%) excellent, 19 (19%) satisfactory, and 60 (59%) poor outcomes. The overall, re-revision free, survivorship rate following revision TSA in all patients was 97%, 88%, and 80% at 1, 5, and 10 years, respectively. Patients who underwent their index HHR procedure without a history of humeral fracture had significantly better pain relief, active abduction, and external rotation compared to those with a history of fracture. CONCLUSIONS: Revision TSA following HHR results in significant decreases in pain scores and increases in range of motion. Patient satisfaction rates following these revision procedures, however, are not indicative of the improvements in these parameters. Revision TSA for non- fracture related HHR results in superior outcomes when compared to revision TSA following HHR performed initially for humeral fracture. 5. Correlation of Radiographic (MRI) Appearance and Clinical Outcome in Arthroscopic Rotator Cuff Repair *William T. Pennington, M.D. Franklin, WI David J. Gibbons, M.D. Franklin, WI Brian A. Bartz, P.A. Franklin, WI Brian L. Butler Cambridge, MA PURPOSE: Many studies have focused on clinical outcomes of arthroscopic rotator cuff repair. Other reports have focused on radiographic evidence of rotator cuff healing following repair. We wish to correlate the postoperative functional and clinical outcomes with radiographic appearance in patients undergoing arthroscopic rotator cuff repair. METHODS: Objective measures were obtained preoperatively, and at 3, 6, 12, and 24 months postoperatively. These measures included dynamometric strength evaluation of the supraspinatus, infraspinatus, and subscapularis, goniometric range-of-motion measurements, and ASES, UCLA, and VAS scores.