title: Biomechanical and bone histomorphologic evaluation of four surfaces on plateau root form implants: an experimental study in dogs.
abstract: OBJECTIVE
  To evaluate the early bone response to plateau root form dental implants with 4 different surface treatments.
  
  
  METHODS
  Surface treatments comprised (n = 12 each): as-machined (M), alumina-blasted/acid-etched (AB/AE), alumina-blasted/acid-etched + nanothickness bioceramic coating (Nano), and plasma-sprayed calcium phosphate (PSCaP). Implants were placed in the radius diaphyses of 12 beagle dogs, remaining in vivo for 3 and 5 weeks. After euthanasia, the implants were subjected to torque to interface fracture and subsequently nondecalcified for histomorphology. Statistical analysis was performed by a GLM analysis of variance model at 5% significance level.
  
  
  RESULTS
  Torque to interface fracture was significantly greater for the PSCaP group than for other groups (P < .001). Histomorphologic analysis showed woven bone formation around all implant surfaces at 3 weeks, and its replacement by lamellar bone at 5 weeks. Time in vivo did not affect torque measures.
  
  
  CONCLUSIONS
  The PSCaP surface increased the early bone biomechanical fixation of plateau root form implants.
authors.affiliation: Department of Biomaterials and Biomimetics, New York University, New York, New York, USA.
authors.forename: Paulo G
authors.initials: PG
authors.lastname: Coelho
authors.forename: Rodrigo
authors.initials: R
authors.lastname: Granato
authors.forename: Charles
authors.initials: C
authors.lastname: Marin
authors.forename: Estevam A
authors.initials: EA
authors.lastname: Bonfante
authors.forename: Malvin N
authors.initials: MN
authors.lastname: Janal
authors.forename: Marcelo
authors.initials: M
authors.lastname: Suzuki
mesh_terms: D000134:Acid Etching, Dental; D000497:Alloys; D000537:Aluminum Oxide / Q000737:chemistry; D000818:Animals; D001696:Biomechanical Phenomena; D016723:Bone Remodeling / Q000502:physiology; D002130:Calcium Phosphates / Q000737:chemistry; D002516:Ceramics / Q000737:chemistry; D020099:Coated Materials, Biocompatible / Q000737:chemistry; D003722:Dental Alloys / Q000737:chemistry; D045662:Dental Etching / Q000379:methods*; D015921:Dental Implants; D017267:Dental Prosthesis Design; D004285:Dogs; D008297:Male; D049329:Nanostructures / Q000737:chemistry; D016348:Osseointegration / Q000502:physiology*; D010012:Osteogenesis / Q000502:physiology; D010027:Osteotomy; D011884:Radius / Q000503:physiopathology* / Q000601:surgery; D013314:Stress, Mechanical; D013499:Surface Properties; D013997:Time Factors; D014025:Titanium / Q000737:chemistry; D019415:Torque
chemical_list: D000497:Alloys; D002130:Calcium Phosphates; D020099:Coated Materials, Biocompatible; D003722:Dental Alloys; D015921:Dental Implants; C031462:titanium alloy (TiAl6V4); C020243:calcium phosphate; D014025:Titanium; D000537:Aluminum Oxide