Travis G. Maak

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STUDY DESIGN A biomechanical study of intervertebral foraminal narrowing during simulated automotive rear impacts. OBJECTIVES To quantify foraminal width, height, and area narrowing during simulated rear impact, and evaluate the potential for nerve root and ganglion impingement in individuals with and without foraminal spondylosis. SUMMARY OF BACKGROUND(More)
BACKGROUND Biomechanical differences between anatomical double-bundle and central single-bundle anterior cruciate ligament reconstruction using the same graft tissue have not been defined. PURPOSE The purpose of this study was to compare these reconstructions in their ability to restore native knee kinematics during a reproducible Lachman and pivot-shift(More)
BACKGROUND Minimal attention has been directed toward tibial tunnel position and the native tibial anterior cruciate ligament (ACL) footprint. PURPOSE To evaluate the effect of tibial tunnel position on restoration of knee kinematics and stability after ACL reconstruction. STUDY DESIGN Controlled laboratory study. METHODS Ten paired cadaveric knees(More)
BACKGROUND Heterotopic ossification (HO) is a known complication of hip arthroscopy. Little is known about the factors that lead to HO after hip arthroscopy. PURPOSE The aim of this study was to evaluate the effect of nonsteroidal anti-inflammatory drugs (NSAIDs) and other operative variables on the development of HO. STUDY DESIGN Cohort study; Level of(More)
STUDY DESIGN Posterolateral lumbar spine fusions in New Zealand white rabbits. OBJECTIVE To evaluate the efficacy of recombinant human growth and differentiation factor-5 (rhGDF-5) lyophilized to a Healos carrier (cross-linked type I collagen with hydroxyapatite coating; DePuy Spine, Inc., Raynham, MA) in inducing fusion. SUMMARY OF BACKGROUND DATA Bone(More)
Recurrent rotational instability has been identified as a potential source of failure of anterior cruciate ligament (ACL) reconstructions. The aim of the study was to assess whether knee kinematics in the horizontal configuration more closely resemble the intact knee when compared with other single-bundle configurations. Using the Praxim computer navigation(More)
Rotator cuff tear arthropathy encompasses a broad spectrum of pathology, but it involves at least three critical features: rotator cuff insufficiency, degenerative changes of the glenohumeral joint, and superior migration of the humeral head. Although many patients possess altered biomechanics of the glenohumeral joint secondary to rotator cuff pathology,(More)
The pathogenesis of rotator cuff degeneration remains poorly defined, and the incidence of degenerative tears is increasing in the aging population. Rates of recurrent tear and incomplete tendon-to-bone healing after repair remain significant for large and massive tears. Previous studies have documented a disorganized, fibrous junction at the tendon-to-bone(More)
BACKGROUND Knee joint infection is a potentially devastating complication of anterior cruciate ligament (ACL) reconstruction. There is a theoretical increased risk of infection with the use of allograft material. HYPOTHESIS An allograft ACL reconstruction predisposes patients to a higher risk of bacterial infection. STUDY DESIGN Cohort Study; Level of(More)