Ponte Osteotomies With Pedicle Screw Instrumentation in the Treatment of Adolescent Idiopathic Scoliosis.

STUDY DESIGN: Review of prospective database. OBJECTIVES: To report the results of Ponte osteotomy with pedicle screw instrumentation for major thoracic adolescent idiopathic (AIS) curves. SUMMARY OF BACKGROUND DATA: Ponte osteotomy for achieving coronal and sagittal correction of major thoracic curves in AIS with pedicle screw instrumentation is a widespread technique, but results have not been well described. METHODS: Review of 87 consecutive AIS patients with Lenke 1-4 curves who underwent Ponte osteotomies and pedicle screw instrumentation by 2 surgeons at a single institution. Surgical details, blood loss, and complications were recorded. We evaluated coronal and sagittal radiological measurements and Scoliosis Research Society-22 (SRS-22) questionnaire scores over 2-year follow-up. RESULTS: The mean preoperative thoracic coronal Cobb angle was 57° ± 9.7°, fulcrum flexibility was 47.2%, and lateral Cobb angle was 17.8° ± 4°. The mean estimated blood loss (EBL), expressed as percent estimated blood volume, was 35.8 ± 20.5 mL. There was significant improvement in coronal thoracic Cobb angle, percent correction, and apical vertebral translation over 2-year follow-up (p < .05). In hypokyphotic curves, there was a significant increase in lateral thoracic T5-T12 kyphosis from 8.1° to 18.3° (p < .001). In hyperkyphotic curves, mean lateral thoracic T5-T12 kyphosis improved from 45° to 26° (p < .001). Median SRS-22 domains were higher after treatment (p < .05). Complications included significant hypotension (1), EBL greater than 75% estimated blood volume (2), and wound infection needing drainage (2). There were neuromonitoring signal changes in 7 patients but no significant neurological complications. CONCLUSIONS: In this case series of major thoracic AIS curves treated with segmental pedicle screw instrumentation and Ponte osteotomies, there was an improvement in the coronal and sagittal radiological parameters. A prospective controlled study is needed to determine whether pedicle screw instrumentation and Ponte osteotomies influence outcomes and complications.

Distal tibial physeal bridge: a complication from a tension band plate and screw construct. Report of a case.

We report on a case of a tension band plate and screw construct (Eight Plate) used over the anterior distal tibia in an 9-year-old girl in an attempt to induce recurvatum of the ankle joint to correct a recalcitrant equinus deformity. With growth of the distal tibial physis, the epiphyseal screw was drawn through the physis into the distal tibial metaphysis, resulting in the creation of a transphyseal bony bar. Caution should be exercised when attempting temporary hemiepiphyseodesis using a plate and screw construct in small epiphyses or in an osteopenic bone.

An analysis of suboptimal outcomes of medial malleolus fractures in skeletally immature children.

We retrospectively analyzed cases of intra-articular medial malleolar fractures in skeletally-immature patients (Salter-Harris III and IV) with suboptimal outcomes at St. Louis Children's Hospital and Shriner's Hospital for Children. Common causes of poor outcome were frac­ture malunion or malreduction and physeal damage. Malreductions of only 2 mm does not appear to be toler­ated and the concept of "remodeling" does not apply to these fracture patterns. Based on this study, we "recom­mend" fracture reduction and fixation if there is greater than 1 mm of fracture step-off..

Concurrent tethered cord release and growing-rod implantation-is it safe?

Study Design Retrospective case series from one institution with a comparison control group. Objective To evaluate the safety of concomitant tethered cord release and growing-rod insertion in individuals with early onset scoliosis. Methods We retrospectively reviewed patients who underwent concurrent tethered cord release and growing-rod insertion. We compared our data to a comparison control group of eight patients who underwent staged tethered cord release and growing-rod insertion. Results We identified three patients meeting criteria. There were no neurological complications in the three patients who underwent concomitant surgery. Average immediate postoperative curve correction was 43.3 degrees (47.6%). We identified seven patients who underwent staged surgery from a multicenter prospective database. No neurological complications were reported, and average immediate postoperative correction was 35.1 degrees (46.2%). Conclusion We believe that concurrent tethered cord release and growing-rod insertion can be performed safely with the use of multimodality neurophysiological monitoring techniques.

Insurance status and delay in orthotic treatment in children.

OBJECTIVE: To determine if the type of health insurance is associated with a delay in children obtaining orthoses. METHODS: The medical records of 60 children who were prescribed an ankle-foot orthosis (AFO) or thoracolumbosacral orthosis (TLSO) were retrospectively reviewed. Ten children were randomly chosen with either of 3 types of insurance (government, health maintenance organizations [HMOs], and preferred provider organizations [PPOs]) with an orthosis provided by a single supplier. The time interval between prescription and insurance company authorization was recorded, as well as the interval between prescription and procurement of the orthosis. RESULTS: There were significant differences in the time from prescription to authorization of orthoses between insurance types (P = 0.001) and time from authorization until brace procurement between insurance types (P = 0.01). Children with PPO insurance received authorization for an AFO faster than children with government insurance or an HMO (P < 0.05). Children with government insurance received authorization for a TLSO significantly later than children with PPO insurance (P = 0.004) or HMO insurance (P = 0.03). The difference in time between authorization and procurement of a TLSO in children with PPO insurance (36 days) was strikingly different from that of children with government insurance (123 days) (P = 0.003). DISCUSSION: This study documents that children with government insurance face delays in obtaining orthotic treatment compared with children with PPO insurance. The delay in the procurement of the more expensive brace (TLSO is approximately 4 times the cost of an AFO) correlated to more striking delays in the government-insured population.

A comparison of monolateral and circular external fixation of unstable diaphyseal tibial fractures in children.

Forty-six tibial fractures in 44 children, which were treated by external fixation at our institution between 1 January 1991 and 31 December 1999, were retrospectively identified. Twenty-nine fractures were treated with monolateral fixation and 16 were treated with circular fixation. The average age of the patients was 11 years 8 months (range 3 years 11 months-17 years 7 months). External fixators were left in place for a mean of 13.7 weeks (range 9-33 weeks). Eleven significant complications occurred. Loss of reduction necessitating return to the operating room occurred in four patients (13%) and malunion occurred in an additional patient with monolateral fixators. Four of these patients had comminuted fracture patterns. All of the patients with loss of reduction were 12 years of age or older. No patient with a circular fixator developed mal-alignment. Final alignment in 45 of the 46 fractures was acceptable. External fixation is a safe and effective method of treating unstable diaphyseal tibia fractures in children. Patients over the age of 12 years, particularly with comminuted fracture patterns may be more effectively treated with circular external fixation or, if treated with monolateral fixation, require close observation.