title: Effects of different implant surfaces and designs on marginal bone-level alterations: a review.
abstract: OBJECTIVE
  The purpose of this review was to evaluate the effect of different implant surfaces and designs on marginal bone-level (MBL) alterations.
  
  
  METHODS
  A MEDLINE search (PubMed) was performed to identify clinical, prospective and controlled studies using a sufficient sample size (>10 subjects) and with a follow-up time of > or =3 years.
  
  
  RESULTS
  Ten publications fulfilled the inclusion criteria. Two studies evaluated the influence of implant surface characteristics and two studies reported on the effect of implant design on MBL changes. Six publications analyzed the combined effect of different implant surfaces and designs on MBL alterations. As revealed from available studies, there is no evidence that modified surfaces are superior to non-modified implant surfaces in marginal bone preservation. One study reported on significantly improved MBL preservation for implants with a conical and micro-threaded marginal collar than implants with a cylindrical and non-threaded marginal portion after 3 years in function. No implant system was found to be superior in marginal bone preservation.
authors: Department of Periodontology, The Sahlgrenska Academy, University of Gothenburg, Göteborg, Sweden. ingemar.abrahamsson@odontologi.gu.se
authors: Ingemar
authors: I
authors: Abrahamsson
authors: Tord
authors: T
authors: Berglundh
mesh_terms: D016301:Alveolar Bone Loss / Q000517:prevention & control*; D000539:Alveolar Process / Q000033:anatomy & histology*; D020099:Coated Materials, Biocompatible; D000044:Dental Abutments; D003758:Dental Implantation, Endosseous; D015921:Dental Implants; D017267:Dental Prosthesis Design; D006801:Humans; D013499:Surface Properties
chemical_list: D020099:Coated Materials, Biocompatible; D015921:Dental Implants