title: Accuracy of interchangeable implant impression systems: an in vitro pilot study.
abstract: OBJECTIVE
  To evaluate the accuracy of impressions on changing the implant component (coping and abutment replica) between Brånemark and BIOMET 3i and between Straumann and Allfit.
  
  
  METHODS
  Two master casts were constructed, one containing pair of Brånemark self-tap Mk II fixtures (Nobel Biocare) labeled Master cast I and the other containing pair of Straumann Standard plus implant, SLA fixtures (Straumann) labeled Master cast II. Ten impressions of each master cast were made by open tray technique using polyether impression material. Five out of 10 impressions made from master cast I contained Brånemark pair of coping and replica and the other 5 contained 3i (Implant Innovations). Five out of 10 impressions made from master cast II contained Straumann pair of copings and replica and the remaining 5 contained Allfit implants (Ihde Dental). Duplicated casts were prepared, and distances between copings were measured using traveling microscope and compared the distance in master casts.
  
  
  RESULTS
  No significant difference was observed in mean value between 2 master casts and their duplicates.
  
  
  CONCLUSIONS
  The interchangeability of coping and abutment replica between Brånemark and BIOMET 3i and between Straumann and Allfit was found to be possible without compromising the quality of impressions.
authors.affiliation: *Associate Professor and Consultant of Prosthodontics and Implantology; Director of Dental Implant and Osseointegration Research Chair, College of Dentistry, King Saud University, Riyadh, Saudi Arabia. †Associate Professor, Department of Prosthetic Dental Sciences, College of Dentistry, King Saud University, Riyadh, Saudi Arabia. ‡Postgraduate Student, Harvard School of Dental Medicine, Boston, MA. §Resident, Riyadh Military Hospital, Riyadh, Saudi Arabia. ‖Resident, Ministry of Health, Riyadh, Saudi Arabia. ¶Professor, Department of Periodontics and Community Dentistry, College of Dentistry, King Saud University, Riyadh, Saudi Arabia.
authors.forename: Abdullah M
authors.initials: AM
authors.lastname: AlFarraj Aldosari
authors.forename: Abdulaziz M
authors.initials: AM
authors.lastname: AlBaker
authors.forename: Abdulmonem A
authors.initials: AA
authors.lastname: AlShihri
authors.forename: Majid I
authors.initials: MI
authors.lastname: AlJadeed
authors.forename: Loay A
authors.initials: LA
authors.lastname: AlBwardi
authors.forename: Sukumaran
authors.initials: S
authors.lastname: Anil
mesh_terms: D000044:Dental Abutments; D015921:Dental Implants; D003761:Dental Impression Technique; D017267:Dental Prosthesis Design; D006801:Humans; D066298:In Vitro Techniques; D010865:Pilot Projects
chemical_list: D015921:Dental Implants