European Journal of Prosthodontics and Restorative Dentistry

cover art

Cover Date:
March 2010
Print ISSN:
0965-7452
Vol:
18
Issue:
1

Dimensional Stability of Complete Denture Permanent Acrylic Resin Denture Bases; A Comparison of Dimensions Before and After a Second Curing Cycle.

Abstract - The purpose of this study was to measure deformation of mandibular complete denture permanent bases after secondary curing. A cast of a flat mandibular edentulous ridge was duplicated ten times. A wax base was laid on the original cast, two wax sprues were attached and an overcast was made. The overcast was used to produce wax bases similar in outline and thickness on the duplicate casts. These were invested and following manufacturer’s instructions ten similar acrylic resin bases were produced. The fitting surface of each denture base was scanned on a contacting scanner with an axis resolution of 1µm and accurate to 25µm. Denture teeth were waxed up on the base on the original master cast, an overcast was made to produce wax ups and tooth positions that were similar in outline and thickness to the original. These were processed, removed from the flasks and excess acrylic resin was removed. The denture bases were rescanned in an identical fashion to the first scanning procedure. Using commercially developed metrology software calibrated colour maps were generated for each denture base that illustrates measurements of differences between pairs of surfaces. Histograms showing distributions of distances between points were constructed. 50% of the points were separated by a mean 50µm or less and that 90% of the points were separated by 160µm or less. The maximum separation was of 380µm. Complete denture permanent bases were not found to distort significantly as a result of being subjected to a second heat curing cycle as part of final processing of dentures.

KEY WORDS: Denture base, Processing, Deformation, Complete Denture

Article Price
£15.00
Institution Article Price
£
Page Start
33
Page End
38
Authors
Michael Robert Fenlon, Andrzej Stanislaw Juszczyk, Jose Mauricio Rodriguez, Richard Victor Curtis

Articles from this issue

  • Title
  • Pg. Start
  • Pg. End

  1. Book Review - Esthetics with resin composite: basics and techniques
  2. 0
  3. 0

  1. Effect of Noble Metal Alloy Post and Core Material on the Fracture Resistance of Endodontically Treated Teeth
  2. 2
  3. 7

  1. An Audit to Assess the Quality and Efficiency of Complete and Partial Dentures Delivered by Junior Hospital Staff
  2. 8
  3. 12

  1. An Assessment of Shade Taking by Dental Undergraduates
  2. 13
  3. 16

  1. An Investigation of the ability of Computerized Axiography to Reproduce Occlusal Contacts
  2. 17
  3. 22

  1. Fracture Resistance of Endodontically Treated Teeth: Effect of Tooth Coloured Post Material and Surface Conditioning
  2. 23
  3. 30

  1. Embedding Implant Dentistry into the Undergraduate Dental Curriculum
  2. 31
  3. 32

  1. Dimensional Stability of Complete Denture Permanent Acrylic Resin Denture Bases; A Comparison of Dimensions Before and After a Second Curing Cycle.
  2. 33
  3. 38

  1. Is the Bond Between Acrylic Resin Denture Teeth and Denture Base Resin Stronger if They are Both Made by the Same Manufacturer?
  2. 39
  3. 41

  1. Decision Making Among Swedish General Dental Practitioners Concerning Prosthodontic Treatment Planning In a Shortened Dental Arch
  2. 43
  3. 47