Arthroscopic Fixation of Knee Femoral Condyle Osteochondritis Dissecans Fragment With Bone Marrow Aspirate Concentrate.

This article reviews a technique for arthroscopic fixation of an osteochondritis dissecans fragment with bone marrow aspirate concentrate augmentation. This technique involves safe harvest of bone marrow arthroscopically from the intercondylar notch, proper preparation and debridement of the parent bone, reduction of the progeny osteochondritis dissecans fragment, insertion of the bone marrow aspirate concentrate, and placement of multiple headless compression screws for fixation.

Change in Sagittal Plane Alignment Following Surgery for Scheuermann's Kyphosis.

Study Design: Retrospective comparative study.

Objective: To evaluate changes in sagittal plane alignment in patients with Scheuermann's kyphosis after spinal fusion.

Summary Of Background Data: Although surgery is commonly undertaken in patients with severe Scheuermann's kyphosis for deformity correction, there are limited data regarding the response of spinopelvic parameters and sagittal plane alignment of the spine to surgical treatment.

Spinal stenosis frequent in children with multiple hereditary exostoses.

Purpose: Children with multiple hereditary exostoses (MHE) have numerous osteochondromas, with the most prominent lesions typically over the appendicular skeleton. A recent report noted a high rate of intracanal lesions in this patient population and recommended preventative spinal screening with magnetic resonance imaging (MRI) or computed tomography (CT). We sought to evaluate the prevalence of spinal stenosis from intracanal osteochondromas at our pediatric orthopedic center in order to evaluate if routine screening is warranted.

The accuracy of navigation and 3D image-guided placement for the placement of pedicle screws in congenital spine deformity.

Background: Treatment of congenital spine deformity has high surgical risk due to abnormal anatomy and dysmorphic pedicles. We hypothesized that an image-guided navigation system would result in a low rate of screw revision due to malposition.

Methods: From 2007 to 2010, 142 screws were placed in 14 consecutive patients with congenital spine deformity using an intraoperative computer tomography (CT) (O-arm) and image-guided navigation system (Stealth).

Pediatric pedicle screw placement using intraoperative computed tomography and 3-dimensional image-guided navigation.

Study Design: A retrospective cohort study reporting the use of intraoperative computed tomography (CT) and image-guided navigation system for the placement of pedicle screws in pediatric compared with adult patients.

Objective: To evaluate the accuracy of open pedicle screw placement in pediatric patients using intraoperative CT and 3-dimensional (3D) image-guided navigation.

Summary Of Background Data: Pedicle screws are widely used in children for the correction of spinal deformity.