Abstract
Statement of problem
Research evaluating the accuracy of anterior tooth mold templates to computer-aided
design and computer-aided manufacture (CAD-CAM) fabricated complete removable dental
prostheses (CRDPs) is limited.
Purpose
The purpose of this in vitro study was to investigate the accuracy of the anterior
denture tooth arrangement on CAD-CAM complete removable dental prostheses made with
the anterior tooth mold template.
Material and methods
A maxillary and mandibular edentulous model was mounted on a semiadjustable articulator
to simulate a patient’s maxillary arch. Definitive impressions and jaw relation records
were made as per the manufacturer’s protocol. A maxillary and mandibular anatomic
measuring device was completely seated onto the edentulous models, centered on the
edentulous model midline, and horizontally positioned parallel to the mandibular ridge.
A medium-size anterior tooth mold template sticker was attached on the anatomic measuring
device to identify the maxillary dental midline and incisal edge position and was
sent to the manufacturer as the proposed tooth arrangement reference for the definitive
complete removable dental prostheses. A total of 10 milled complete removable dental
prostheses were generated for 2 groups by using 2 different tooth arrangement techniques.
One group (n=5) used the monobloc milling technique without bonding of denture teeth,
while the other group (n=5) used the bonding system for denture teeth on the milled
denture base. For comparison, a camera mounted on a tripod was used for photographic
documentation. Reference markers placed on the edentulous model were used to orient
and measure the difference of 4 aspects of the anterior tooth arrangement: average
incisal edge position, intercanine distance, midline, and clinical crown length of
the left central incisor. The difference values between the tooth mold template and
definitive complete removable dental prostheses were statistically analyzed by multivariate
ANOVA (α=.05) and 1-sample t tests (adjusted α=.0125).
Results
Overall, statistically significant differences were found between the tooth mold template
(control) and definitive complete removable dental prostheses at all measuring aspects
except for the midline of the midline of the milled arrangement technique (P<.0125). In terms of the midline value, the value of the milled group did not show
a significant difference compared with tooth mold template (-0.19 mm). However, the
value of the bonded group indicated a significant difference of midline (0.44 mm toward
to the left of the tooth mold template midline). When the complete removable dental
prosthesis milled denture tooth and complete removable dental prosthesis bonded denture
tooth techniques were compared, there was no difference in the tested variables between
the milled and the bonded groups (P>.0125).
Conclusions
The tooth mold template did not represent an accurate position for definitive complete
removable dental prostheses for either the milled or bonded techniques. The largest
differences were found at the average incisal edge of the anterior teeth and the intercanine
distance for both groups. However, there was overall no clinical difference between
the 2 groups (milled and bonded) of CAD-CAM complete removable dental prostheses.
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References
- The traditional therapeutic paradigm: complete denture therapy.J Prosthet Dent. 1998; 79: 6-13
- Computer-aided technology for fabricating complete dentures: systematic review of historical background, current status and future perspectives.J Prosthet Dent. 2013; 109: 361-366
- CAD/CAM complete dentures: a review of two commercial fabrication systems.J Calif Dent Assoc. 2013; 41: 407-416
- Clinical applications of digital dental technology.1st ed. John Wiley & Sons, Inc., Chichester, UK2015: 107-138
- Phillips’ science of dental materials.12th ed. Elsevier/Saunders, St Louis2012: 519
- Comparing of denture base adaptation between CAD/CAM and conventional fabrication techniques.J Prosthet Dent. 2016; 116: 249-256
- CAD/CAM fabricated complete dentures: concepts and clinical methods of obtaining required morphological data.J Prosthet Dent. 2012; 107: 34-46
- Clinical performance of CAD/CAM fabricated complete dentures: a retrospective study and assessment of patient satisfaction.J Prosthet Dent. 2016; 116: 431-435
- A retrospective comparison of two definitive impression techniques and their associated postinsertion adjustments in complete denture prosthodontics.J Prosthodont. 2003; 12: 192-197
- Prospective cohort pilot study of 2-visit CAD/CAM monolithic complete dentures and implant-retained overdentures: clinical and patient-centered outcomes.J Prosthet Dent. 2016; 115: 578-586.e1
- Trends in computer-aided manufacturing in prosthodontics: a review of the available streams.Int J Dent. 2014; 2014: 783948
- Prosthodontic treatment for edentulous patients.13th ed. Mosby/Elsevier, St. Louis2012: 210
- Polyvinyl siloxane impression materials: an update on clinical use.Aust Dent J. 1998; 43: 434-438
- Trial of a CAD/CAM system for fabricating complete dentures.Dent Mater J. 2011; 30: 93-96
- Effects of offset values for artificial teeth positions in CAD/CAM complete denture.Comput Biol Med. 2014; 52: 1-7
- Comparing the perception of dentists and lay people to altered dental esthetics.J Esthet Dent. 1999; 11: 311-324
Article info
Publication history
Published online: July 27, 2021
Footnotes
This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.
Identification
Copyright
© 2021 by the Editorial Council for the Journal of Prosthetic Dentistry.
