David H. Clements

Learn More
BACKGROUND The lack of a reliable, universally acceptable system for classification of adolescent idiopathic scoliosis has made comparisons between various types of operative treatment an impossible task. Furthermore, long-term outcomes cannot be determined because of the great variations in the description of study groups. METHODS We developed a new(More)
STUDY DESIGN Retrospective review of anterior and posterior fusions for treatment of adolescent idiopathic thoracic scoliosis. OBJECTIVES To evaluate both the instrumented thoracic and the spontaneous lumbar curve corrections after treatment of the primary thoracic scoliosis by either anterior or posterior fusion. SUMMARY OF BACKGROUND DATA Recent(More)
STUDY DESIGN A multicenter study of the outcomes of the surgical treatment of adolescent idiopathic scoliosis using the Scoliosis Research Society Questionnaire (SRS 24). OBJECTIVE To evaluate the patient based outcome of the surgical treatment of adolescent idiopathic scoliosis. SUMMARY OF BACKGROUND DATA A paucity of information exists with respect to(More)
STUDY DESIGN Clinical and radiologic assessment derived from a prospective multicenter data base of adolescent idiopathic scoliosis (AIS) patients. OBJECTIVE We investigated if "implant density" or the number of screws correlated with the major curve (thoracic or lumbar) correction at 2 years in patients with AIS. We also investigated the effect of(More)
STUDY DESIGN This was a prospective study of two cohort groups of patients (one group receiving anterior instrumentation and the other posterior instrumentation) receiving treatment for thoracic idiopathic scoliosis. OBJECTIVE To present the 2-year postoperative results of a prospective multicenter study comparing the use of anterior instrumentation with(More)
STUDY DESIGN For this retrospective study, preoperative and postoperative radiographs of posterior spinal fusions for idiopathic scoliosis were reviewed. OBJECTIVES To determine the prevalence and possible causes of proximal kyphosis after posterior spinal fusion for idiopathic scoliosis. SUMMARY OF BACKGROUND DATA Proximal kyphosis has been anecdotally(More)
STUDY DESIGN A radiographic assessment has been developed to include coronal, sagittal, and axial parameters. OBJECTIVE To determine the correlation of postoperative radiographic results and percentage postoperative radiographic improvement with patient clinical self-assessment. SUMMARY OF BACKGROUND DATA With the increasing interest in outcome studies,(More)
STUDY DESIGN Retrospective review. OBJECTIVE To compare the incidence of and risk factors for proximal junctional kyphosis (PJK) in adolescent idiopathic scoliosis (AIS) following posterior spinal fusion using hook, pedicle screw, or hybrid constructs. SUMMARY OF BACKGROUND DATA Proximal junctional kyphosis is a recently recognized phenomenon in adults(More)
STUDY DESIGN A retrospective multicenter consecutive case review of operative adolescent idiopathic scoliosis. OBJECTIVES To define the curve prevalence of a large consecutive series of cases with operative adolescent idiopathic scoliosis as classified by a new system and to test the ability of this new classification system to correlate with regions of(More)
STUDY DESIGN Retrospective review with historical cohort. OBJECTIVE Our study measures axial rotation of the apical vertebral bodies of patients with adolescent idiopathic scoliosis treated with an all pedicle screw (APS) construct versus a hook-rod (HR) construct using computed tomography (CT). SUMMARY OF BACKGROUND DATA Ecker et al (Spine(More)