Hyrax Application as a Tooth-Borne Distractor for Maxillary Advancement

Abstract

Distraction osteogenesis (DO) has become a mainstream surgical technique for patients with jaw deformities. The aim of this study was to report the use of internal DO in the treatment of maxillary hypoplasia in a patient with cleft lip and palate. The case illustrates a 17-year-old boy with class III malocclusion, maxillary deficiency, and cleft lip and palate. Because the patient was experiencing severe hypernasality, it was decided to treat him by DO. The treatment process began by mounting a hyrax in the upper jaw for lateral expansion. A second hyrax was mounted in a way to create anteroposterior expansion. One day after the second hyrax application, the patient underwent a modified Le Fort I osteotomy. He was instructed to turn the screws twice per day for 12 days. The treatment was continued by means of a conventional face mask for 2 months. After 16 months of active treatment, favorable correction of the skeletal problem was observed. The S-N-A angle increased by 5 degrees, and patient's hypernasality was comprehensively improved.

Anterior maxillary distraction osteogenesis for cleft lip and palate patients - A case series

“…Many other studies have evaluated the effectiveness of DO in the treatment of cleft lip and palate patients suffering from maxillary deficiency. [11][12][13] The pitfall of the surgery is the lack of vector control and development of an anterior open bite. [14] Conclusion AMOD is a good therapeutic procedure to relish the esthetic improvement and establish a good occlusal relationship.…”

Photometric Evaluation of Soft Tissue Changes in CLP Patients: Le Fort I Advancement Osteotomy (ALO) Versus Anterior Maxillary Distraction (AMD)

“…Presently distraction osteogenesis (AMD) has become a mainstream surgical technique in treatment of jaw deficiencies [10]. Published cephalometric post treatment results in series of case reports and research papers have proved AMD to produce better results than conventional Le Fort I surgery [1,[28][29][30][31][32][33][34]. In the present study routine frontal and profile photographs were analysed to compare the soft tissue changes in both ALO and AMD.…”

Use of anterior maxillary distraction osteogenesis in two cleft lip and palate patients

“…Many other studies have evaluated the effectiveness of DO in treatment of cleft and lip palate patients suffering from maxillary deficiency. [ 8 9 10 ]…”