title: Assessment of bioabsorbable hydroxyapatite for secondary bone grafting in unilateral alveolar cleft.
abstract: OBJECTIVE
  The aim of this study was to evaluate the utility and efficacy of bioabsorbable hydroxyapatite and collagen complex for secondary bone graft in unilateral alveolar cleft.
  
  
  METHODS
  From August 2013 to January 2014, 15 patients with unilateral cleft lip and alveolar cleft were enrolled and randomly assigned to two blinded groups. In group I, a cancellous iliac bone graft was placed at the alveolar cleft. In group II, 0.5 ml of HA/Col was placed at the alveolar cleft, and the cancellous iliac bone was positioned in the remaining space. All patients underwent bone grafting with particulate cancellous bone and marrow taken from the anterior iliac crest.
  
  
  RESULTS
  No complications were observed in any patient. The groups did not differ in age, cleft volume, or surgical duration. Intraoperative blood loss and patient-controlled intravenous analgesia (PCA) use were significantly lower in group II (p < 0.05) in comparison to group I. The 1-month volume was 0.895 ml in group I and 0.482 ml in group II (p < 0.05). When the 1-month volume in group II was adjusted for 0.5-ml volume of HA/Col, there was no significant difference in the 1-month volumes (p = 0.32). The 6- and 12-month volumes did not differ significantly between the groups (p = 0.768 and p = 0.165, respectively).
  
  
  CONCLUSIONS
  The autogenous bone was gradually absorbed, while the HA/Col was absorbed and replaced by the autogenous bone. Thus, HA/Col can be used as an iliac graft in alveolar bone graft procedures to reduce the amount of autogenous bone required from the crest, patient stress, and morbidity.
authors.affiliation: Department of Plastic and Reconstructive Surgery, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ward, Tokyo 160-8582, Japan.
authors.forename: Masashi
authors.initials: M
authors.lastname: Takemaru
authors.affiliation: Department of Plastic and Reconstructive Surgery, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ward, Tokyo 160-8582, Japan. Electronic address: ysakamoto@keio.jp.
authors.forename: Yoshiaki
authors.initials: Y
authors.lastname: Sakamoto
authors.affiliation: Department of Orthodontics, Tokyo Dental College, 1-2-2 Masago, Mihama-ward, Chiba 261-8502, Japan.
authors.forename: Teruo
authors.initials: T
authors.lastname: Sakamoto
authors.affiliation: Department of Plastic and Reconstructive Surgery, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ward, Tokyo 160-8582, Japan.
authors.forename: Kazuo
authors.initials: K
authors.lastname: Kishi
mesh_terms: D020341:Absorbable Implants; D015519:Bone Density; D018786:Bone Substitutes / Q000627:therapeutic use*; D016025:Bone Transplantation / Q000379:methods*; D002648:Child; D002971:Cleft Lip / Q000601:surgery*; D002972:Cleft Palate / Q000601:surgery*; D017886:Durapatite / Q000627:therapeutic use*; D005260:Female; D006801:Humans; D007085:Ilium / Q000637:transplantation*; D021621:Imaging, Three-Dimensional; D008297:Male; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome
chemical_list: D018786:Bone Substitutes; D017886:Durapatite
keywords: Alveolar cleft; Computer-aided engineering; Hydroxyapatite; Iliac bone; MDCT; Secondary bone graft