title: Histological and histomorphometric analyses of narrow implants, crestal and subcrestally placed in severe alveolar atrophy: a study in foxhound dogs.
abstract: BACKGROUND
  Narrow-diameter implants provide an alternative to the horizontal augmentation techniques situations severe bone atrophy. Lack of bone width and interdental space has been regarded as an encumbrance in the case selection for prosthetic rehabilitation using dental implants.
  
  
  OBJECTIVE
  The aim of the study was to evaluate bone-to-implant contact and marginal bone loss of two different narrow implants in resorbed ridges at different crestal positions.
  
  
  METHODS
  48 Bredent Narrow(®) implants (24 MiniSky(®) and NarowSky(®) ) were placed at crestal and subcrestal levels in healing bone of atrophic alveolar ridge of 6 American foxhounds. Histological and histomorphometric analyses of osseointegration were carried out at 4 and 8 weeks.
  
  
  RESULTS
  Modeling in the marginal defect region was accompanied by marked decreases in the dimensions of both the buccal and the more lingual bone walls. Relative to BIC, significant differences were found in favor of subcrestal group, for both Narrow Sky and MiniSky. Linear measurements showed to be slightly high in the crestal group. With significant differences for PM-IS (peri-implant mucosa to implant shoulder) and IS-BC (implant shoulder to buccal bone crest).
  
  
  CONCLUSIONS
  Within the limitations of animal study, it can be stated that the NarrowSky(test group) crestal and subcrestal implants showed less crestal bone resorption, higher ISQ values and most BIC at 4 and 8 weeks of evaluation compared with MiniSky implants (control group). The design of the implants plays an important role in peri-implant mucosa and crestal bone maintenance at 8-week follow-up period.
authors: Department of General and Implant Dentistry, University of Murcia, Murcia, Spain.
authors: Josè Luis
authors: JL
authors: Calvo-Guirado
authors: Department of Prosthodontics and Digital Technologies, Stony Brook University, Stony Brook, NY, USA.
authors: Rafael Arcesio
authors: http://orcid.org/0000-0003-1721-0509
authors: RA
authors: Delgado Ruiz
authors: Department of General and Implant Dentistry, University of Murcia, Murcia, Spain.
authors: Maria Piedad
authors: MP
authors: Ramírez-Fernández
authors: Department of Prosthodontics and Digital Technologies, Stony Brook University, Stony Brook, NY, USA.
authors: Marcus
authors: M
authors: Abboud
authors: Department of Oral Surgery, School of Dental Medicine, University of Belgrade, Belgrade, Serbia.
authors: Bojan
authors: B
authors: Janjic
authors: Department of General and Implant Dentistry, University of Murcia, Murcia, Spain.
authors: Jose Eduardo
authors: JE
authors: Maté Sánchez de Val
mesh_terms: D016301:Alveolar Bone Loss / Q000473:pathology*; D000539:Alveolar Process / Q000473:pathology*; D000818:Animals; D016723:Bone Remodeling; D015921:Dental Implants; D004285:Dogs; D016348:Osseointegration
chemical_list: D015921:Dental Implants
keywords: BIC; ISQ; MiniSky implants; bluesky implants; histomorphometry; narrow implants; small-diameter implants