Distraction Osteogenesis In Patients Research Articles

Changes in Speech Following Unilateral Mandibular Distraction Osteogenesis in Patients With Hemifacial Microsomia

Abstract Objective: The purpose of this study was to describe changes in articulation, resonance, and velopharyngeal function following mandibular distraction osteogenesis. Design: This is a descriptive, post hoc study comparing the performance of patients on measures of articulation, resonance, and velopharyngeal function before and after mandibular distraction. Setting: The data were collected at a tertiary health care center located in Chicago. Patients: The clinical data from preoperative and postoperative evaluations of seven mandibular distraction patients were used. Outcome Measures: The outcome measures were number of articulation errors, severity of hypernasality and audible nasal emission, and velopharyngeal orifice size as estimated using the pressure-flow technique. Results: Immediately after distraction, 28% (2/7) experienced a temporary deterioration in articulation and 42% (3/7) experienced a deterioration in nasal resonance. But by the long-term follow-up evaluation, all had returned to th...

Maxillary Distraction Osteogenesis: A Two-Dimensional Mathematical Model

Patients with cleft lip and palate with severe maxillary retrusion usually have a mandible with anterior-superior autorotation and subsequent overclosure and loss of the vertical facial dimension. Maxillary distraction osteogenesis can correct the sagittal maxillomandibular relationship and should simultaneously reestablish vertical dimension through maxillary vertical height increase and clockwise rotation of the mandible to restore facial balance. We present a two-dimensional mathematical model in the sagittal plane, which reestablishes sagittal and vertical skeletal deficiencies and proper occlusal alignment for planning maxillary advancement with distraction osteogenesis in patients with cleft lip and palate. The model is illustrated in a case of a 13-year-old boy with a complete bilateral cleft lip and palate and severe maxillary retrusion. The two-dimensional mathematical model described in this article allows the surgeon and orthodontist to calculate in a simple and accurate way the ideal distraction vector to advance the maxilla to its desired position.

Management of Severe Maxillary Deficiency in Childhood and Adolescence Through Distraction Osteogenesis With an External, Adjustable, Rigid Distraction Device

We present our technique for maxillary distraction osteogenesis in patients with severe maxillary hypoplasia. With the use of an external, adjustable, rigid distraction device, we can now treat patients with severe maxillary hypoplasia with a precise and controlled distraction process, obtaining predictable results. This technique has allowed us to treat patients in all age groups. In this report we review our indications for maxillary distraction and describe our technique using an external, adjustable, rigid midface distraction device.