title: The influence of micro and macro-geometry in term of bone-implant interface in two implant systems: an histomorphometrical study.
abstract: OBJECTIVE
  Many factors could affect the osseous healing of implants such as surface topography of biomaterial, the status of the bone/implant site, implant loading conditions, surgical technique and implant design. The aim of this study was to analyze the BIC of 2 different implants systems characterized by different micro and macrogeometry, that were placed in the posterior maxillary and mandibular jaws of humans, clinically unloaded and retrieved for histomorphometric analyses after 12 weeks.
  
  
  METHODS
  The patients were divided in two groups (Group I and II); group I was composed by 4 patients that each received in the posterior areas of mandible one type A implant [GTB-Plan1Health Amaro (UD) Italy] one type B implant (OsseoSpeed Astra Tech, Dentsply Molndal, Sweden). Group II was composed by 3 patients that each received in the posterior areas of jawsbone one type A implant [GTB-Plan1Health Amaro (UD) Italy] one type B implant (OsseoSpeed Astra Tech, Dentsply Molndal, Sweden). After 12 weeks of healing all the implants of both groups were harvested with the peri-implant bone tissues. Osseointegration process was evaluated throughout measurements of BIC.
  
  
  RESULTS
  No statistical significance differences were found among the mean percentage of BIC of Group I - type A were 66,51%versus49,96% in Group I - type B, as well as among the mean percentage of BIC of Group II - type A were 43.7%versus60.02% in Group II - type B.
  
  
  CONCLUSIONS
  Our results highlight that the mean percentage of BIC after 12 weeks from the implants placement without functional loading is not influenced by the composition of the implant surface.
authors.affiliation: Private Practice, Chieti, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Rocci
authors.affiliation: Department of Social Dentistry, National Institute for Health, Migration and Poverty, Rome, Italy.
authors.forename: R
authors.initials: R
authors.lastname: Calcaterra
authors.affiliation: Schol of Dentistry, University of Rome "Tor Vergata", Rome, Italy.
authors.forename: M
authors.initials: M
authors.lastname: DI Girolamo
authors.affiliation: Private Practice, Chieti, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Rocci
authors.affiliation: Private Practice, Chieti, Italy.
authors.forename: C
authors.initials: C
authors.lastname: Rocci
authors.affiliation: Department of Social Dentistry, National Institute for Health, Migration and Poverty; School of Dentistry, University of Rome "Tor Vergata", Rome, Italy.
authors.forename: L
authors.initials: L
authors.lastname: Baggi
keywords: histomorphometry; macrogeometry; microgeometry