European Journal of Prosthodontics and Restorative Dentistry

cover art

Cover Date:
December 2017
Print ISSN:
0965-7452
Electronic ISSN:
2396-8893
Vol:
25
Issue:
4

An Investigation into the Trueness and Precision of Copy Denture Templates Produced by Rapid Prototyping and Conventional Means

Objective. To assess the trueness and precision of copy denture templates produced using traditional methods and 3D printing. Material and methods. Six copies of a denture were made using: 1. Conventional technique with silicone putty in an impression tray (CT). 2. Conventional technique with no impression tray (CNT). 3. 3D scanning and printing (3D). Scan trueness and precision was investigated by scanning a denture six times and comparing five scans to the sixth. Then the scans of the six CT, CNT and 3D dentures were compared by aligning, in turn, the copies of each denture to the scanned original. Outcome measures were the mean surface-to-surface distance, standard deviation of that distance and the maximum distance. Student’s unpaired t-tests with Bonferroni correction were used to analyse the results. Results. The repeated scans of the original denture showed a scan trueness of 0.013mm (SD 0.002) and precision of 0.013mm (SD
0.002). Trueness: CT templates, 0.168mm (0.047), CNT templates 0.195mm (0.034) and 3D 0.103mm (0.021). Precision: CT templates 0.158mm (0.037), CNT 0.233mm (0.073), 3D 0.090mm (0.017). For each outcome measure the 3D templates demonstrated an improvement which was statistically significant (p<0.05). Conclusions. 3D printed copy denture templates reproduced the original with greater trueness and precision than conventional techniques.

Keywords
3D Printing
Additive Manufacture
Removable Denture
Prosthodontics
Dental Prostheses
Complete Denture Duplication
Dimensional Measurement Accuracy

10.1922/EJPRD_01716Davda07

Article Price
£15.00
Institution Article Price
£
Page Start
186
Page End
192
Authors
Dr. Krishan Davda, Cecilie Osnes, Sean Dillon, Dr. Jianhua Wu, Dr. Paul Hyde, Dr. Andrew Keeling

Articles from this issue

  • Title
  • Pg. Start
  • Pg. End

  1. An Investigation into the Trueness and Precision of Copy Denture Templates Produced by Rapid Prototyping and Conventional Means
  2. 186
  3. 192

  1. A Measurement Protocol for the Marginal and Internal Fit of All-Ceramic Crowns
  2. 193
  3. 200

  1. The Effect of Core and Veneering Design on the Optical Properties of Polyether Ether Ketone
  2. 201
  3. 208

  1. The Effect of Surface Preparation of Acrylic Teeth
  2. 209
  3. 218

  1. A Randomised Controlled Trial of a Universal Bonding Agent at Three Years: Self Etch vs Total Etch
  2. 220
  3. 227

  1. Adhesion and Early Colonization of S. Mutans on Lithium Disilicate Reinforced Glass-Ceramics, Monolithic Zirconia and Dual Cure Resin Cement
  2. 228
  3. 234