title: Maxillary stability after Le Fort I osteotomy with self-setting α-tricalcium phosphate and an absorbable plate.
abstract: The purpose of this study was to compare retrospectively postoperative differences in maxillary stability after Le Fort I osteotomy and fixation with an unsintered hydroxyapatite (u-HA)/poly-l-lactic acid (PLLA) plate with or without self-setting α-tricalcium phosphate (Biopex(®)) as interpositional material. Subjects comprised 45 patients diagnosed with mandibular prognathism with maxillary retrognathism and mandibular prognathism with bimaxillary asymmetry. All patients underwent Le Fort I osteotomy and bilateral sagittal split ramus osteotomy with fixation by uHA/PLLA plates. Patients were divided into 4 groups consisting of 9 maxillary impaction cases with Biopex(®) (group 1) to fill the gap between the bone segments, 14 maxillary advancement cases with Biopex(®) (group 2), 8 maxillary impaction cases without Biopex(®) (group 3) and 14 maxillary advancement cases without Biopex(®) (group 4). Changes in cepahalometric parameters at time intervals (1, 3 and 12 months) between the groups were compared. Results showed that stability did not depend on the use or otherwise of Biopex(®).
authors.affiliation: Department of Oral and Maxillofacial Surgery, Division of Medicine, Interdisciplinary Graduate School of Medicine and Engineering University of Yamanashi, 1110 Shimokato, Chuo-shi,Yamanashi, Japan. kueki@yamanashi.ac.jp
authors.forename: K
authors.initials: K
authors.lastname: Ueki
authors.forename: K
authors.initials: K
authors.lastname: Okabe
authors.forename: K
authors.initials: K
authors.lastname: Marukawa
authors.forename: A
authors.initials: A
authors.lastname: Mukozawa
authors.forename: A
authors.initials: A
authors.lastname: Moroi
authors.forename: M
authors.initials: M
authors.lastname: Miyazaki
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: Yoshizawa
authors.forename: K
authors.initials: K
authors.lastname: Ooi
authors.forename: S
authors.initials: S
authors.lastname: Kawashiri
mesh_terms: D020341:Absorbable Implants; D000293:Adolescent; D000328:Adult; D001672:Biocompatible Materials / Q000737:chemistry / Q000627:therapeutic use*; D001843:Bone Cements / Q000627:therapeutic use*; D001860:Bone Plates; D002130:Calcium Phosphates / Q000627:therapeutic use*; D002508:Cephalometry / Q000379:methods; D002809:Chondroitin Sulfates / Q000627:therapeutic use; D017886:Durapatite / Q000737:chemistry*; D005146:Facial Asymmetry / Q000601:surgery; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D006882:Hydroxyapatites / Q000627:therapeutic use; D007180:Incisor / Q000473:pathology; D019248:Jaw Fixation Techniques / Q000295:instrumentation; D008297:Male; D008334:Mandible / Q000601:surgery; D008437:Maxilla / Q000473:pathology* / Q000601:surgery; D008875:Middle Aged; D009295:Nasal Bone / Q000473:pathology; D019340:Osteotomy, Le Fort / Q000295:instrumentation / Q000379:methods*; D059229:Osteotomy, Sagittal Split Ramus / Q000379:methods; D011091:Polyesters / Q000737:chemistry*; D011378:Prognathism / Q000601:surgery; D012189:Retrospective Studies; D012658:Sella Turcica / Q000473:pathology; D013386:Succinates / Q000627:therapeutic use; D055815:Young Adult
chemical_list: D001672:Biocompatible Materials; C481019:Biopex; D001843:Bone Cements; D002130:Calcium Phosphates; D006882:Hydroxyapatites; D011091:Polyesters; D013386:Succinates; C485828:alpha-tricalcium phosphate; C499699:hydroxyapatite-polylactide; D002809:Chondroitin Sulfates; D017886:Durapatite