Abstract:
STUDY DESIGN:A prospective, randomized, controlled clinical trial comparing a cylindrical threaded titanium cage to a femoral ring allograft control for anterior lumbar interbody fusion. OBJECTIVE:To compare these two implants with regard to arthrodesis. Secondary outcome measures included pain relief, neurological status, and general health status. SUMMARY OF BACKGROUND DATA:Anterior lumbar interbody fusion is a well-accepted procedure using trapezoidal femoral ring allografts or cylindrical titanium cages. Clinical and biomechanical studies evaluating these two distinct constructs are numerous; however, no prospective, randomized study comparing them has been done. METHODS:A multicenter trial of 140 patients: 78 were randomized to the cylindrical threaded titanium cage device treatment arm and 62 patients randomized into the control group. All had autogenous iliac crest bone graft packed into the device. All patients had a single-level stand-alone anterior lumbar interbody fusion at either the L4-L5 or L5-S1 interspace for symptomatic degenerative disc disease. Radiographic fusion data were collected as well as multiple types of outcome data, including pain/disability scores, neurologic status, and overall health. RESULTS:At 12 months, 97% of the cylindrical threaded titanium cage device group and 40% of the control group demonstrated radiographic fusion. At 24 months, 97% of the cylindrical threaded titanium cage group and 52% of the control group showed radiographic fusion. These fusion rate differences are statistically significant (P < 0.001). The Oswestry and neurologic scores were not significantly different between groups. DISCUSSION:This is the first prospective, randomized, multicenter clinical trial that compares fusion cage results to control data. CONCLUSION:Cylindrical threaded titanium cages have a higher fusion rate, comparable improvements in clinical outcome (Oswestry, Low Back Pain Questionnaire, SF-36), and fewer secondary supplemental fixation procedures compared to the femoral ring allograft control.
journal_name
Spine (Phila Pa 1976)journal_title
Spineauthors
Sasso RC,Kitchel SH,Dawson EGdoi
10.1097/01.BRS.0000107007.31714.77keywords:
subject
Has Abstractpub_date
2004-01-15 00:00:00pages
113-22; discussion 121-2issue
2eissn
0362-2436issn
1528-1159journal_volume
29pub_type
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