title: Correlation between density and resorption of fresh-frozen and autogenous bone grafts.
abstract: METHODS
  This analysis compared the outcome of fresh-frozen versus autologous bone block grafts for horizontal ridge augmentation in patients with Cawood and Howell class IV atrophies.
  
  
  METHODS
  Seventeen patients received autologous grafts and 21 patients received fresh-frozen bone grafts. Patients underwent CT scans 1 week and 6 months after surgery for graft volume and density analysis.
  
  
  RESULTS
  Two autologous and 3 fresh-frozen grafts failed. Autologous and fresh-frozen grafts lost, respectively, 28% and 46% of their initial volume (P = 0.028). It is noteworthy that less dense fresh-frozen blocks lost more volume than denser grafts (61% versus 16%).
  
  
  CONCLUSIONS
  According to these 6-month results, only denser fresh-frozen bone graft may be an acceptable alternative to autologous bone for horizontal ridge augmentation. Further studies are needed to investigate its behaviour at longer time points.
authors: Università degli Studi di Parma, SbiBit, Via Gramsci 14, 43126 Parma, Italy.
authors: Simone
authors: 0000-0002-0826-927X
authors: S
authors: Lumetti
authors: Università degli Studi di Parma, SbiBit, Via Gramsci 14, 43126 Parma, Italy.
authors: Carlo
authors: 0000-0001-7476-7181
authors: C
authors: Galli
authors: Università degli Studi di Parma, SbiBit, Via Gramsci 14, 43126 Parma, Italy.
authors: Edoardo
authors: E
authors: Manfredi
authors: Università di Modena, Via Università 4, 41121 Modena, Italy.
authors: Ugo
authors: U
authors: Consolo
authors: Università di Bologna, Via San Vitale 59, 40126 Bologna, Italy.
authors: Claudio
authors: C
authors: Marchetti
authors: Università degli Studi di Parma, SbiBit, Via Gramsci 14, 43126 Parma, Italy.
authors: Giulia
authors: 0000-0003-2902-2214
authors: G
authors: Ghiacci
authors: Università degli Studi di Parma, SbiBit, Via Gramsci 14, 43126 Parma, Italy.
authors: Andrea
authors: 0000-0003-1641-7743
authors: A
authors: Toffoli
authors: Università degli Studi di Parma, SbiBit, Via Gramsci 14, 43126 Parma, Italy.
authors: Mauro
authors: M
authors: Bonanini
authors: Università di Modena, Via Università 4, 41121 Modena, Italy.
authors: Attilio
authors: A
authors: Salgarelli
authors: Università degli Studi di Parma, SbiBit, Via Gramsci 14, 43126 Parma, Italy.
authors: Guido M
authors: GM
authors: Macaluso
mesh_terms: D000328:Adult; D000539:Alveolar Process / Q000473:pathology* / Q000637:transplantation*; D015519:Bone Density; D001862:Bone Resorption / Q000473:pathology*; D016025:Bone Transplantation; D005260:Female; D005629:Frozen Sections; D006801:Humans; D008297:Male; D008875:Middle Aged; D014182:Transplantation, Autologous; D055815:Young Adult