title: Impression of multiple implants using photogrammetry: description of technique and case presentation.
abstract: OBJECTIVE
  To describe a technique for registering the positions of multiple dental implants using a system based on photogrammetry. A case is presented in which a prosthetic treatment was performed using this technique.
  
  
  METHODS
  Three Euroteknika® dental implants were placed to rehabilitate a 55-year-old male patient with right posterior maxillary edentulism. Three months later, the positions of the implants were registered using a photogrammetry-based stereo-camera (PICcamera®). After processing patient and implant data, special abutments (PICabutment®) were screwed onto each implant. The PICcamera® was then used to capture images of the implant positions, automatically taking 150 images in less than 60 seconds. From this information a file was obtained describing the relative positions - angles and distances - of each implant in vector form. Information regarding the soft tissues was obtained from an alginate impression that was cast in plaster and scanned. A Cr-Co structure was obtained using CAD/CAM, and its passive fit was verified in the patient's mouth using the Sheffield test and the screw resistance test.
  
  
  CONCLUSIONS
  Twelve months after loading, peri-implant tissues were healthy and no marginal bone loss was observed. The clinical application of this new system using photogrammetry to record the position of multiple dental implants facilitated the rehabilitation of a patient with posterior maxillary edentulism by means of a prosthesis with optimal fit. The prosthetic process was accurate, fast, simple to apply and comfortable for the patient.
authors.affiliation: Clínica Odontológica, Gascó Oliag 1, 46021- Valencia, Spain, Maria.penarrocha@uv.es.
authors.forename: David
authors.initials: D
authors.lastname: Peñarrocha-Oltra
authors.forename: Rubén
authors.initials: R
authors.lastname: Agustín-Panadero
authors.forename: Leticia
authors.initials: L
authors.lastname: Bagán
authors.forename: Beatriz
authors.initials: B
authors.lastname: Giménez
authors.forename: María
authors.initials: M
authors.lastname: Peñarrocha
mesh_terms: D015921:Dental Implants; D003761:Dental Impression Technique; D006801:Humans; D008297:Male; D008875:Middle Aged; D010780:Photogrammetry
chemical_list: D015921:Dental Implants