title: Maxillary stability following downgraft and/or advancement procedures with stabilization using rigid fixation and porous block hydroxyapatite implants.
abstract: The stability of results using bone plates for skeletal stabilization and porous block hydroxyapatite implants as a bone graft substitute were evaluated in maxillary downgrafts, maxillary advancements, and modified LeFort III midface advancements. The records of 24 patients with greater than 5 mm of forward or downward movement were evaluated cephalometrically, analyzing the presurgical, immediate postsurgical, and longest follow-up radiographs. The 11 maxillary downgraft, 14 maxillary advancement, and three midface advancement procedures all showed less than 1 mm of relapse. Biopsies of the porous block hydroxyapatite grafts were taken on six patients in this study at 6 to 10 months postsurgery. All showed connective tissue ingrowth and 11.3% to 36.1% bone ingrowth throughout the pores of the implants, and no inflammatory response.
authors.affiliation: Baylor College of Dentistry, Dallas.
authors.forename: R W
authors.initials: RW
authors.lastname: Wardrop
authors.forename: L M
authors.initials: LM
authors.lastname: Wolford
mesh_terms: D000293:Adolescent; D000328:Adult; D001842:Bone and Bones / Q000473:pathology / Q000503:physiopathology; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D006882:Hydroxyapatites; D007103:Immobilization; D008297:Male; D008437:Maxilla / Q000002:abnormalities / Q000473:pathology / Q000601:surgery*; D010027:Osteotomy / Q000379:methods*; D019736:Prostheses and Implants; D012189:Retrospective Studies; D014945:Wound Healing
chemical_list: D006882:Hydroxyapatites