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Title Digital Models Are As Accurate As Plaster Models Even For Space Analysis
Clinical Question Are digital models as accurate as plaster casts when determining space analysis?
Clinical Bottom Line It was found that digital modes are clinically acceptable, if not quite as accurate as plaster casts, for space analysis. (See Comments on the CAT below)
Best Evidence (you may view more info by clicking on the PubMed ID link)
PubMed ID Author / Year Patient Group Study type
(level of evidence)
#1) 12828439Zilberman/200320 setups of various malocclusions using artificial teethComparison Study
Key resultsCompared plaster casts were compared to Orthocad and Orthocad was found to be clinically acceptable
#2) 19577140Leifert/200925 Class I crowded patientsComparison Study
Key resultsCompared Orthocad to standard models and found no significant difference on mandibular casts, and a small (.4mm) difference on maxillary casts.
Evidence Search PubMed: “Orthodontic space analysis”
Comments on
The Evidence
These two modest studies show that Orthocad’s digital models are clinically acceptable for determining space analysis.
Applicability When available, digital models may be used with approximately the same accuracy as plaster casts (without all the time and labor).
Specialty/Discipline (Public Health) (Orthodontics) (Pediatric Dentistry) (Prosthodontics)
ID# 275
Date of submission: 11/11/2009spacer
E-mail McKennaK@uthscsa.edu
Author Kelly McKenna, DDS
Co-author(s) e-mail
Faculty mentor/Co-author Clarence C. Bryk, DDS, MS
Faculty mentor/Co-author e-mail BRYKC@uthscsa.edu
Basic Science Rationale
(Mechanisms that may account for and/or explain the clinical question, i.e. is the answer to the clinical question consistent with basic biological, physical and/or behavioral science principles, laws and research?)
post a rationale
None available
Comments and Evidence-Based Updates on the CAT
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by Ketu Lincoln (San Antonio, TX) on 07/08/2012
I conducted a PubMed search on this topic July 2012. A systemic review published in 2011 (PMID: 21516170 ) references two additional articles (18, 19) that state the same conclusion and now have furthered the studies to superimpose digital dental models with 3D photographs/CBCT to assess dental/skeletal/and soft tissue treatment outcomes.
by Lindsey Fraser (San Antonio, TX) on 04/02/2012
I searched PubMed on this topic in April 2012. A systematic review was published in 2011 with the same results that digital models are as accurate as plaster models. PubMed ID 21205164.
by Julio De la Fuente (San Antonio TX) on 07/13/2011
An updated comparison study from 2010 has come to the same conclusion. Digital models are just as accurate as plaster models. Eur J Orthod. 2010 Oct;32(5):589-95. Epub 2010 Feb 17 PMID: 20164126

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