2009 Faculty Researchers

Craig A. Kuhns, M.D.

Direct Lateral Interbody Fusion versus Transforaminal Lumbar Interbody Fusion: A Biomechanical Comparison.

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Department

Orthopaedic Surgery

Office Location

Missouri Spine Center, 402 North Keene St. Suite 101

Phone #:

Office: (573) 882-1440
Fax: (573) 875-9500

Summary

Direct lateral interbody fusion (DLIF) is a relatively new minimally invasive method of lumbar fusion that is growing in popularity. Studies are still needed to more clearly elucidate the efficacy of (DLIF) procedure. The purpose of our study was to compare construct rigidity between the DLIF and a more traditional fusion technique, transforaminal lumbar interbody fusion (TLIF). The goal is to determine if the DLIF has as much inherent stability as the TLIF. 14 Fresh frozen cadaveric specimens DEXA scanned and segregated into 2 groups (N=7) matching for lumbar bone mineral density (BMD). 7 specimens instrumented with DLIF technique and 7 specimens instrumented with TLIF technique. Non-destructive biomechanical testing to be performed on all specimens in axial rotation, flexion-extension and lateral bending. Statistical comparisons will be made between the 2 groups.

Results may change surgeon preference for or against the use of DLIF. Results may also influence surgeons to utilize or not utilized supplemental fixation when performing a DLIF, especially if the stability of the DLIF is considerably less than a TLIF.