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Lumbar spinal arthroplasty: analysis of one center’s twenty best and twenty worst clinical outcomes

STUDY DESIGN: This is a retrospective analysis of data that were collected prospectively from 2 concurrent FDA IDE lumbar arthroplasty clinical trials performed at a single center. OBJECTIVES: The purpose of this study was to determine if factors differentiating those patients with the best and worst clinical outcomes from total disc arthroplasty (TDR) could be identified. SUMMARY OF BACKGROUND DATA: Overall the results of TDR have been favorable, including recent results from 2 FDA IDE trials conducted in the United States. However, as with any surgical procedure, there were some patients with extremely good outcomes, and some with poor outcomes. If factors differentiating these groups could be identified, this may help refine patient selection criteria and improve future results. METHODS: The databases of Charite and ProDisc patients at a single site were reviewed to identify patients who reached the 24-month follow-up period. A total of 203 patients, 63 who were implanted with the Charite prosthesis, and 140 who were implanted with the ProDisc prosthesis, were identified. The percentage change in the preoperative to postoperative VAS and Oswestry scores were used to identify the 10 best and 10 worst outcomes for each of the device types. Logistic regression analysis was conducted to determine which of a battery of demographic and clinical assessments were related to the best/worst group classification. RESULTS: Results of the regression analysis found that the only factor significantly related to clinical outcome was the length of time off work before surgery. None of the demographic variables, preoperative VAS or Oswestry scores or radiographic assessment of device placement, were significantly related to clinical outcome. Patients who were off work for shorter durations, or not at all, were more likely to be in the best-outcome group compared with patients who were off work for an extended period of time before surgery. CONCLUSION: This study suggests that among patients undergoing TDR, the length of time off work before surgery was related to outcome. No additional factors related to the best/worst classification were identified in the current study

Keywords : Adolescent,Adult,adverse effects,Arthroplasty,Arthroplasty,Replacement,classification,Disability Evaluation,etiology,Female,Humans,Intervertebral Disc,Intervertebral Disc Displacement,Joint Prosthesis,Lumbar Vertebrae,Male,methods,Middle Aged,physiopathology,Postoperative Complications,Retrospective Studies,Severity of Illness Index,surgery,Young Adult,, Spinal,Arthroplasty,Analysis,One, london podiatry centre harley street

Date of Publication : 2008 Nov 1

Authors : Guyer RD;Siddiqui S;Zigler JE;Ohnmeiss DD;Blumenthal SL;Sachs BL;Hochschuler SH;Rashbaum RF;

Organisation : Texas Back Institute Research Foundation, Plano, TX 75093, USA. rguyer@texasback.com

Journal of Publication : Spine (Phila Pa 1976 )

Pubmed Link : https://www.ncbi.nlm.nih.gov/pubmed/18941428

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