title: Histologic and histomorphometric evaluation of two grafting materials Cenobone and ITB-MBA in open sinus lift surgery.
abstract: OBJECTIVE
  Alveolar ridge reduction caused after tooth extraction can be minimized through ridge preservation and application of graft materials. The aim of this study was to compare the histologic and histomorphometric aspects of bone particulated allografts, Cenobone and ITB-MBA, in the reconstruction of vertical alveolar ridge after maxillary sinus augmentation.
  
  
  METHODS
  This clinical trial was performed among 20 patients. The participants were randomly divided into two groups of 10 participants. The first group received Cenobone and the second group received ITB-MBA. Tissue samples were prepared 6 months later at the time of implant installation and after successful maxillary sinus floor augmentation. Tissue sections were examined under a light microscope. The data were analyzed by Chi-square andt-test.
  
  
  RESULTS
  The mean trabecular thickness of the samples in the Cenobone group was 13.61 ± 7.47 μm compared to 13.73 ± 7.37 μm in the ITB-MBA group (P= 0.93). A mild inflammation process (Grade 1) was detected in both the groups. The amount of remaining biomaterial in the Cenobone group was estimated to be 8 ± 19% vs. 7 ± 12% in the ITB-MBA group (P= 0.30). Bone formation was reported 49.71% in the Cenobone group vs. 40.76% in the ITB-MBA group (P= 0.68). The mean newly formed vessel in the Cenobone group was 0.64 ± 0.7 vs. 1.5 ± 2.3 in the ITB-MBA group (P= 0.14).
  
  
  CONCLUSIONS
  There was no significant difference between the two groups of patients regarding trabecular thickness, remaining biomaterial allograft, and the density of blood vessels after sinus floor elevation; hence, there was no difference between the two groups regarding implant outcome. More designed studies as randomized controlled trials and controlled clinical trials, which evaluate the long-term implant outcome; comparing the different bone graft materials is also required to improve evidence on survival and success rate.
authors.affiliation: Dental Materials Research Center, Dental Faculty, University of Medical Sciences, Babol, Iran.
authors.forename: Babak
authors.initials: B
authors.lastname: Amoian
authors.affiliation: Dental Materials Research Center, Dental Faculty, University of Medical Sciences, Babol, Iran.
authors.forename: Maryam
authors.initials: M
authors.lastname: Seyedmajidi
authors.affiliation: Faculty of Dentistry and Dental Research Center, Birjand University of Medical Sciences, Brijand, Iran.
authors.forename: Hamidreza
authors.initials: H
authors.lastname: Safipor
authors.affiliation: Faculty of Dentistry and Dental Research Center, Birjand University of Medical Sciences, Brijand, Iran.
authors.forename: Sediqe
authors.initials: S
authors.lastname: Ebrahimipour
keywords: Allografts; biomaterials; bone substitutes; sinus floor augmentation