Pterygomaxillary separation during Le Fort I osteotomy has been associated with life-threatening complications. Fractures of the pterygoid plates may play a role in the occurrence of these problems and may impede desired movements of the maxilla. This study compares the incidence of complications and pterygoid plate fractures during Le Fort I osteotomy with and without the use of a curved osteotome. Patients were randomly assigned to one of two groups in which pterygomaxillary separation was achieved either with or without osteotome. Measurements of lateral maxillary wall thickness, clinical assessment of the presence and location of fractures, and a subjective evaluation of the ease of downfracture were recorded. Coronal and axial CT scans were obtained between the seventh and tenth postoperative day. / There was no significant difference in incidence of pterygoid plate fracture between the two groups. A strong clinical trend was detected for males to have a greater incidence of pterygoid plate fractures than females. The incidence of palatine bone fractures was low. Low level fractures of the pterygoid plates of the sphenoid bone are a commonplace occurrence during the Le Fort I osteotomy. Further studies assessing alternative methods of pterygomaxillary separation are recommended.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.22852 |
| Date | January 1995 |
| Creators | Chehade, Antoine Jean-Marc |
| Contributors | Bentley, K. C. (advisor) |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Master of Science (Faculty of Dentistry.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: 001467754, proquestno: MM08001, Theses scanned by UMI/ProQuest. |
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