Techniques for preparing of guide planes: in vitro comparative study

Authors

  • Eduardo Shigueyuki Uemura Assistant Professor of the Dental Materials and Prosthesis Department of the São José dos Campos School of Dentistry of the São Paulo State University.
  • João Maurício Silva Substitute Professor of the Dental Materials and Prosthesis Department of the School of Dentistry of São José dos Campos, São Paulo State University.
  • Alexandre Luiz Souto Borges Assistant Professor of the Dental Materials and Prosthesis Department of the São José dos Campos School of Dentistry of the São Paulo State University.
  • Eron Toshio Colauto Yamamoto Clinical Professor of the Dental Materials and Prosthesis Department of the School of Dentistry of the 9th of July University.

DOI:

https://doi.org/10.14295/bds.2014.v17i2.936

Abstract

The correct parallelism of guiding planes when constructing a Removable Partial Denture not only defines the axis of insertion and removal of the prosthesis, but also limits the possible axes of movement during functioning. Therefore, the purpose of the study was to compare some techniques and the use of an intra-oral device for those preparations. Dummies were performed in a direct manner, simulating the absence of teeth 15, 45, 12 and 42. The four preparation techniques chosen were: Group 1 – freehand preparation; group 2 - guide pins; Group 3 - crown guides and Group 4 - parallel intraoral device – ParalAB. No statistical difference was shown between the mean values of angles found for the freehand (82.85°) and guide pin (83.60°) groups. Also, no statistical significant difference was observed between the mean values of angles found for the resin cap (of 88.83) and intraoral device (88.58 º) groups; however they were superior to the findings for the freehand and guide pin groups. The studied methods are effective for what they were proposed; however, one should select the method according to the experience and skills, to promote the best results.

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Published

2014-05-12

Issue

Section

Clinical or Laboratorial Research Manuscript