title: Computed tomographic evaluation of alterations of the buccolingual width of the alveolar ridge after immediate implant placement associated with the use of a synthetic bone substitute.
abstract: OBJECTIVE
  To evaluate the alterations of the buccolingual width of the alveolar ridge after immediate implant placement using a fully synthetic biphasic calcium phosphate (BCP) consisting of a mixture of 60% hydroxyapatite and 40% ?-tricalcium phosphate in esthetic regions.
  
  
  METHODS
  The buccolingual widths of the alveolar ridge in 20 extraction sites in 20 patients were assessed using computed tomography. Measurements were performed before and 6 months after extractions and immediate implant placement. In group 1 (11 patients), BCP was in the space between the buccal wall of the alveolar ridge and implant. In group 2 (9 patients), the same evaluations and procedures were performed but without using BCP.
  
  
  RESULTS
  The buccolingual dimensions of the alveolar ridge in group 1 (BCP) showed no significant preoperative differences (8.49 ± 1.1 mm) during the 6-month period after surgery (8.82 ± 0.9 mm) (P = .14). In group 2, the differences in buccolingual dimensions of the alveolar ridge were statistically significant (P = .01) with reduction in dimensions from 8.12 ± 0.7 mm during the preoperative period to 7.01 ± 0.4 mm 6-months after surgery.
  
  
  CONCLUSIONS
  The use of BCP was effective in preserving buccolingual dimensions of alveolar ridges in immediate implant surgeries.
authors.affiliation: Sao Leopoldo Mandic Dental School, Campinas/SP, Brazil.
authors.forename: Jamal Hassan
authors.initials: JH
authors.lastname: Assaf
authors.forename: Fabricio Batistin
authors.initials: FB
authors.lastname: Zanatta
authors.forename: Rui Barbosa
authors.initials: RB
authors.lastname: de Brito
authors.forename: Fabiana Mantovani Gomes
authors.initials: FM
authors.lastname: França
mesh_terms: D000328:Adult; D000368:Aged; D016301:Alveolar Bone Loss / Q000517:prevention & control*; D000539:Alveolar Process / Q000033:anatomy & histology / Q000000981:diagnostic imaging*; D018786:Bone Substitutes / Q000008:administration & dosage*; D002130:Calcium Phosphates / Q000008:administration & dosage*; D003758:Dental Implantation, Endosseous / Q000379:methods; D017886:Durapatite / Q000008:administration & dosage*; D005260:Female; D006801:Humans; D057893:Immediate Dental Implant Loading / Q000379:methods*; D008297:Male; D008875:Middle Aged; D059351:Organ Sparing Treatments / Q000379:methods; D018579:Patient Selection; D013997:Time Factors; D014057:Tomography, X-Ray Computed; D014081:Tooth Extraction; D055815:Young Adult
chemical_list: D018786:Bone Substitutes; D002130:Calcium Phosphates; D017886:Durapatite; C018392:tricalcium phosphate