title: A device for determination of a plane ensuring parallel preparation.
abstract: OBJECTIVE
  Parallel preparation of a greater number of teeth with a different tilt is a difficult clinical task. For precise guidance of the preparation instruments with a fixed individual tilt it is necessary to determine the "working preparation plane". A device for orientation and fixation of an individual direction for parallel preparation is created.
  
  
  METHODS
  We have prepared 47 bridge abutments using our methodology. The working models are subjected to control and comparative analysis with a precise laboratory parallelometer. The reported results do not show differences requiring statistical analysis.
  
  
  CONCLUSIONS
  The device serves to determine the working preparation plane. It promotes the fixing of an intraoral parallelometer that controls the achieved parallelism between the homonymous surfaces of dental stumps.
authors.affiliation: Department of Prosthetic Dentistry, Faculty of Dentistry, Higher Medical Institute, Plovdiv, Bulgaria.
authors.forename: G R
authors.initials: GR
authors.lastname: Todorov
authors.forename: R D
authors.initials: RD
authors.lastname: Ralev
mesh_terms: D003724:Dental Arch / Q000033:anatomy & histology; D003772:Dental Pins; D017266:Dental Prosthesis / Q000295:instrumentation* / Q000379:methods*; D003817:Dentition; D004867:Equipment Design; D006801:Humans