PMID- 29136309
OWN - NLM
STAT- MEDLINE
DCOM- 20191126
LR  - 20191126
IS  - 1532-849X (Electronic)
IS  - 1059-941X (Linking)
VI  - 28
IP  - 4
DP  - 2019 Apr
TI  - Comparison of Fit of Dentures Fabricated by Traditional Techniques Versus CAD/CAM 
      Technology.
PG  - 428-435
LID - 10.1111/jopr.12604 [doi]
AB  - PURPOSE: To compare the shrinkage of denture bases fabricated by three methods: 
      CAD/CAM, compression molding, and injection molding. The effect of arch form and 
      palate depth was also tested. MATERIALS AND METHODS: Nine titanium casts, 
      representing combinations of tapered, ovoid, and square arch forms and shallow, 
      medium, and deep palate depths, were fabricated using electron beam melting (EBM) 
      technology. For each base fabrication method, three poly(vinyl siloxane) 
      impressions were made from each cast, 27 dentures for each method. 
      Compression-molded dentures were fabricated using Lucitone 199 poly methyl 
      methacrylate (PMMA), and injection molded dentures with Ivobase's Hybrid Pink 
      PMMA. For CAD/CAM, denture bases were designed and milled by Avadent using their 
      Light PMMA. To quantify the space between the denture and the master cast, 
      silicone duplicating material was placed in the intaglio of the dentures, the 
      titanium master cast was seated under pressure, and the silicone was then trimmed 
      and recovered. Three silicone measurements per denture were recorded, for a total 
      of 243 measurements. Each silicone measurement was weighed and adjusted to the 
      surface area of the respective arch, giving an average and standard deviation for 
      each denture. RESULTS: Comparison of manufacturing methods showed a statistically 
      significant difference (p = 0.0001). Using a ratio of the means, compression 
      molding had on average 41% to 47% more space than injection molding and CAD/CAM. 
      Comparison of arch/palate forms showed a statistically significant difference (p 
      = 0.023), with shallow palate forms having more space with compression molding. 
      The ovoid shallow form showed CAD/CAM and compression molding had more space than 
      injection molding. CONCLUSION: Overall, injection molding and CAD/CAM fabrication 
      methods produced equally well-fitting dentures, with both having a better fit 
      than compression molding. Shallow palates appear to be more affected by shrinkage 
      than medium or deep palates. Shallow ovoid arch forms appear to benefit from the 
      use of injection molding compared to CAD/CAM and compression molding.
CI  - (c) 2017 by the American College of Prosthodontists.
FAU - McLaughlin, J Bryan
AU  - McLaughlin JB
AD  - U.S. Army Advanced Education Program in Prosthodontics, Fort Gordon, GA.
FAU - Ramos, Van Jr
AU  - Ramos V Jr
AD  - Department of Restorative Dentistry, School of Dentistry, University of 
      Washington, Seattle, WA.
FAU - Dickinson, Douglas P
AU  - Dickinson DP
AD  - Dental Research Department, Fort Gordon Dental Health Activity, Fort Gordon, GA.
LA  - eng
PT  - Journal Article
DEP - 20171114
PL  - United States
TA  - J Prosthodont
JT  - Journal of prosthodontics : official journal of the American College of 
      Prosthodontists
JID - 9301275
RN  - 9011-14-7 (Polymethyl Methacrylate)
MH  - Computer-Aided Design
MH  - *Denture Bases
MH  - *Denture Design
MH  - Polymethyl Methacrylate
OTO - NOTNLM
OT  - 3D printing
OT  - CAD/CAM
OT  - arch form
OT  - complete dentures
OT  - computer-aided design
OT  - denture bases
OT  - digital dentures
OT  - injection molding
OT  - maxilla
OT  - maxillary arch
OT  - palate
OT  - palate depth
OT  - removable
OT  - selective laser sintering
OT  - titanium
EDAT- 2017/11/15 06:00
MHDA- 2019/11/27 06:00
CRDT- 2017/11/15 06:00
PHST- 2017/01/15 00:00 [accepted]
PHST- 2017/11/15 06:00 [pubmed]
PHST- 2019/11/27 06:00 [medline]
PHST- 2017/11/15 06:00 [entrez]
AID - 10.1111/jopr.12604 [doi]
PST - ppublish
SO  - J Prosthodont. 2019 Apr;28(4):428-435. doi: 10.1111/jopr.12604. Epub 2017 Nov 14.