title: Transference of virtual planning and planning over biomedical prototypes for dental implant placement using guided surgery.
abstract: OBJECTIVE
  This study evaluated the transference of virtual planning and planning over biomedical prototypes for dental implant placement using guided surgery.
  
  
  METHODS
  This experiment was conducted with 11 identical replicas of a human edentulous mandible. For each mandible, models and surgical guides were manufactured using stereolithography. Simulated surgeries were performed on the prototypes. Following this, the implants were placed in the mandible replicas. Superposition of the tridimensional pre- and postoperative models was used for virtual evaluation. The real evaluation was conducted by linear measurements directly on the models.
  
  
  RESULTS
  The variations in angles and distances between the coronal, central and apical regions of the 22 implants evaluated in this study had mean values <1.45 degrees and 0.41 mm. The correlations between the positions of implant beds in each mandible were fair to very good, according to the distance analyzed and the interpretation guidelines used.
  
  
  CONCLUSIONS
  According to the results of this study, the variations found in the transference of dental implant positioning to the operative field, determined during virtual planning and obtained in surgeries simulated with biomedical prototypes, confirm the reliability of guided surgery techniques in implantology.
authors.affiliation: Oral and Maxillofacial Surgery Department, School of Dentistry, Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre, RS, Brazil. vnviegas@ig.com.br
authors.forename: Vinicius Nery
authors.initials: VN
authors.lastname: Viegas
authors.forename: Vinicius
authors.initials: V
authors.lastname: Dutra
authors.forename: Rogério Miranda
authors.initials: RM
authors.lastname: Pagnoncelli
authors.forename: Marília Gerhardt
authors.initials: MG
authors.lastname: de Oliveira
mesh_terms: D003198:Computer Simulation; D003758:Dental Implantation, Endosseous / Q000379:methods*; D006801:Humans; D007575:Jaw, Edentulous / Q000000981:diagnostic imaging; D008334:Mandible / Q000000981:diagnostic imaging; D008953:Models, Anatomic; D010347:Patient Care Planning; D025321:Surgery, Computer-Assisted / Q000379:methods*; D014057:Tomography, X-Ray Computed; D014584:User-Computer Interface