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Morphologic airway changes after mandibular setback osteotomy for prognathism with and without cleft palate
N Katakura1, M Umino, Y Kubota
1Department of Physiology, Faculty of Dentistry, Tokyo Medical and Dental University, Japan.
Anesthesia & Pain Control in Dentistry
|January 1, 1993
Summary
Mandibular setback surgery narrows the pharyngeal airway in patients with prognathism. This airway narrowing is more significant in patients with cleft palate and maxillary hypoplasia.
Area of Science:
- Oral and Maxillofacial Surgery
- Orthodontics
- Craniofacial Surgery
Background:
- Mandibular setback osteotomy is a surgical procedure to correct mandibular prognathism.
- The impact of this surgery on pharyngeal airway dimensions requires further investigation.
Purpose of the Study:
- To evaluate the morphologic changes in the pharyngeal airway following mandibular setback osteotomy.
- To compare airway changes between patients with isolated prognathism and those with prognathism and maxillary hypoplasia due to cleft palate.
Main Methods:
- Lateral cephalograms were used for pre- and postoperative assessment of craniofacial morphology and airway size.
- Twenty-six patients with prognathism were analyzed, divided into two groups based on the presence of maxillary hypoplasia secondary to cleft palate.
Main Results:
- A significant reduction in pharyngeal airway width was observed in both patient groups post-surgery.
- Patients with maxillary hypoplasia secondary to cleft palate exhibited narrower postoperative airway dimensions compared to those without.
Conclusions:
- Mandibular setback osteotomy leads to a decrease in pharyngeal airway width.
- The airway narrowing effect is more pronounced in prognathic patients with cleft palate-associated maxillary hypoplasia.