title: Maxillary stability after Le Fort I osteotomy using three different plate systems.
abstract: The purpose of this study was to compare postoperative changes in maxillary stability after Le Fort I osteotomy in three groups: with an unsintered hydroxyapatite (u-HA)/poly-L-lactic acid (PLLA) plate; a PLLA plate; and a titanium plate. Subjects comprised 60 Japanese patients diagnosed with mandibular prognathism. All patients underwent Le Fort I osteotomy and bilateral sagittal split ramus osteotomy. All patients were randomized in groups of 20 to a u-HA/PLLA group, a PLLA plate group and a titanium plate group. Changes in postoperative time intervals between the plate groups were compared using lateral and posteroanterior cephalography. The uHA/PLLA group had significantly larger values than the PLLA group regarding change of mx1-S perpendicular to SN between 3 and 12 months (T3) (P=0.0269). The uHA/PLLA group had a significantly larger value than the PLLA group regarding change of S-A perpendicular to SN between baseline and 1 month (T1) (P=0.0257). There was no significant difference in the other measurements. This study suggests that maxillary stability with satisfactory results could be obtained in the u-HA/PLLA, PLLA plate and titanium plate groups, although there was a slight difference between the u-HA/PLLA and PLLA plate systems in Le Fort I osteotomy.
authors.affiliation: Department of Oral and Maxillofacial Surgery, Graduate School of Medicine, Kanazawa University, Japan. kueki@med.kanazawa-u.ac.jp
authors.forename: K
authors.initials: K
authors.lastname: Ueki
authors.forename: K
authors.initials: K
authors.lastname: Okabe
authors.forename: A
authors.initials: A
authors.lastname: Moroi
authors.forename: K
authors.initials: K
authors.lastname: Marukawa
authors.forename: M
authors.initials: M
authors.lastname: Sotobori
authors.forename: Y
authors.initials: Y
authors.lastname: Ishihara
authors.forename: K
authors.initials: K
authors.lastname: Nakagawa
mesh_terms: D000293:Adolescent; D000328:Adult; D001672:Biocompatible Materials / Q000737:chemistry / Q000145:classification*; D001860:Bone Plates / Q000145:classification*; D001863:Bone Screws; D002508:Cephalometry / Q000379:methods; D002680:Chin / Q000473:pathology; D017886:Durapatite / Q000737:chemistry; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007180:Incisor / Q000473:pathology; D019248:Jaw Fixation Techniques; D019344:Lactic Acid / Q000737:chemistry; D008297:Male; D008437:Maxilla / Q000473:pathology / Q000601:surgery*; D008875:Middle Aged; D008963:Molar / Q000473:pathology; D009295:Nasal Bone / Q000473:pathology; D056948:Orthognathic Surgical Procedures / Q000295:instrumentation; D019340:Osteotomy, Le Fort / Q000295:instrumentation*; D059229:Osteotomy, Sagittal Split Ramus / Q000379:methods; D011091:Polyesters / Q000737:chemistry; D011108:Polymers / Q000737:chemistry; D011378:Prognathism / Q000601:surgery; D011446:Prospective Studies; D012658:Sella Turcica / Q000473:pathology; D014025:Titanium / Q000737:chemistry; D055815:Young Adult; D015050:Zygoma / Q000473:pathology
chemical_list: D001672:Biocompatible Materials; D011091:Polyesters; D011108:Polymers; C499699:hydroxyapatite-polylactide; D019344:Lactic Acid; C033616:poly(lactide); D017886:Durapatite; D014025:Titanium