title: Vertical ridge augmentation of the atrophic posterior mandible with sandwich technique: bone block from the chin area versus corticocancellous bone block allograft--clinical and histological prospective randomized controlled study.
abstract: The aim of the present study is to compare the histological aspects of bone formation in atrophic posterior mandibles augmented by autologous bone block from chin area with corticocancellous bone block allograft used as inlays with the sandwich technique.
  
  
  METHODS
  Sixteen patients with bilateral partial edentulism in the posterior mandible were selected. The residual bone height, preliminarily measured by computed tomography scans, ranged between 5 and 7 mm from the inferior alveolar nerve. All patients required regeneration procedure with autologous bone block from chin area (control group) versus bone block allograft Puros (Zimmer Dental, 1900 Aston Avenue, Carlsbad, CA, USA) (test group). Histological and histomorphometric samples were collected at the time of implant positioning in order to analyze the percentage of newly formed bone, the residual graft material, and marrow spaces/soft tissue.
  
  
  RESULTS
  No statistically significant differences between the two groups were found regarding the percentage of newly formed bone. The percentage of residual grafted material was significantly higher in the test group, whilst the percentage of marrow spaces was higher in control group.
  
  
  CONCLUSIONS
  In conclusion, both procedures supported good results, although the use of bone blocks allograft was less invasive and preferable than harvesting bone from the mental symphysis.
authors.affiliation: Department of Clinical and Experimental Medicine, University of Foggia, FO, Italy.
authors.forename: Luigi
authors.initials: L
authors.lastname: Laino
authors.affiliation: Department of Stomatology and Oral Science, University of Chieti, Italy.
authors.forename: Giovanna
authors.identifier: 0000-0002-2391-6594
authors.initials: G
authors.lastname: Iezzi
authors.affiliation: Department of Stomatology and Oral Science, University of Chieti, Italy.
authors.forename: Adriano
authors.initials: A
authors.lastname: Piattelli
authors.affiliation: Department of Clinical and Experimental Medicine, University of Foggia, FO, Italy.
authors.forename: Lorenzo
authors.initials: L
authors.lastname: Lo Muzio
authors.affiliation: Human Pathology Department, School of Dentistry, University of Messina, Via Consolare Valeria, 98100 Messina, Italy.
authors.forename: Marco
authors.identifier: 0000-0003-2311-9728
authors.initials: M
authors.lastname: Cicciù
mesh_terms: D064591:Allografts; D016025:Bone Transplantation; D002680:Chin / Q000473:pathology / Q000601:surgery; D005260:Female; D006801:Humans; D007576:Jaw, Edentulous, Partially / Q000473:pathology / Q000601:surgery; D008297:Male; D008336:Mandibular Diseases / Q000473:pathology / Q000601:surgery; D010012:Osteogenesis; D011446:Prospective Studies; D013997:Time Factors