title: Comparison of linear measurements and analyses taken from plaster models and three-dimensional images.
abstract: Digital models are an alternative for carrying out analyses and devising treatment plans in orthodontics. The objective of this study was to evaluate the accuracy and the reproducibility of measurements of tooth sizes, interdental distances and analyses of occlusion using plaster models and their digital images. Thirty pairs of plaster models were chosen at random, and the digital images of each plaster model were obtained using a laser scanner (3Shape R-700, 3Shape A/S). With the plaster models, the measurements were taken using a caliper (Mitutoyo Digimatic(®), Mitutoyo (UK) Ltd) and the MicroScribe (MS) 3DX (Immersion, San Jose, Calif). For the digital images, the measurement tools used were those from the O3d software (Widialabs, Brazil). The data obtained were compared statistically using the Dahlberg formula, analysis of variance and the Tukey test (p < 0.05). The majority of the measurements, obtained using the caliper and O3d were identical, and both were significantly different from those obtained using the MS. Intra-examiner agreement was lowest when using the MS. The results demonstrated that the accuracy and reproducibility of the tooth measurements and analyses from the plaster models using the caliper and from the digital models using O3d software were identical.
authors.affiliation: Orthodontics Doctorate Student, Department of Pediatric Dentistry, School of Dentistry, Araraquara, Rua Humaita 1680, Araraquara-SP Brazil-14801-903, e-mail: betinagrehs@hotmail.com.
authors.forename: Betina Grehs
authors.initials: BG
authors.lastname: Porto
authors.affiliation: Professor, Department of Restorative Dentistry, School of Dentistry at Araraquara, UNESP - São Paulo State University, Araraquara- SP, Brazil.
authors.forename: Thiago Soares
authors.initials: TS
authors.lastname: Porto
authors.affiliation: Department of Post-Graduate Program in Dentistry, CEUMA University, Sao Luis-Maranhão, Brazil.
authors.forename: Monica Barros
authors.initials: MB
authors.lastname: Silva
authors.affiliation: Proffesor, Department of Orthodontics, Federal University of Santa Maria, UFSM, Rua Marechal Floriano Peixoto, Santa Maria Rio Grande do Sul, Brazil.
authors.forename: Renésio Armindo
authors.initials: RA
authors.lastname: Grehs
authors.affiliation: Professor, Department of Pediatric Dentistry, School of Dentistry at Araraquara, UNESP - São Paulo State University, Araraquara- SP, Brazil.
authors.forename: Ary dos Santos
authors.initials: Ados S
authors.lastname: Pinto
authors.affiliation: Professor, Department of Conservative Dentistry and Endodontics, MS Ramaiah Dental College and Hospital, Bengaluru, Karnataka India.
authors.forename: Shilpa H
authors.initials: SH
authors.lastname: Bhandi
authors.affiliation: Professor, Department of Post-Graduate Program in Integrated Dental Sciences, University of Cuiabá, Mato Grosso, Cuiabá
authors.forename: Mateus Rodrigues
authors.initials: MR
authors.lastname: Tonetto
authors.affiliation: Professor, Department of Post-Graduate Program in Dentistry, CEUMA University, Sao Luis-Maranhão, Brazil.
authors.forename: Matheus Coelho
authors.initials: MC
authors.lastname: Bandéca
authors.affiliation: Professor, Department of Pediatric Dentistry, School of Dentistry at Araraquara, UNESP - São Paulo State University, Araraquara- SP, Brazil.
authors.forename: Lourdes Aparecida Martins
authors.initials: LA
authors.lastname: dos Santos-Pinto
mesh_terms: D002133:Calcium Sulfate / Q000737:chemistry; D002508:Cephalometry / Q000295:instrumentation / Q000706:statistics & numerical data*; D003481:Cuspid / Q000033:anatomy & histology; D003724:Dental Arch / Q000033:anatomy & histology; D003764:Dental Materials / Q000737:chemistry; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000706:statistics & numerical data*; D021621:Imaging, Three-Dimensional / Q000706:statistics & numerical data*; D007180:Incisor / Q000033:anatomy & histology; D007834:Lasers; D003765:Models, Dental; D008963:Molar / Q000033:anatomy & histology; D009811:Odontometry / Q000706:statistics & numerical data; D057887:Overbite / Q000473:pathology; D015203:Reproducibility of Results
chemical_list: D003764:Dental Materials; D002133:Calcium Sulfate
keywords: Bandéca MC; Bhandi SH; Digital models; Grehs RA; Orthodontics. How to cite this article: Porto BG; Porto TS; Silva MB; Study models; Tonetto MR; dos Santos Pinto A; dos Santos-Pinto LAM. Comparison of Linear Measurements and Analyses taken from Plaster Models and Three-dimensional Images. J Contemp Dent Pract 2014;15(6):681-687. Source of support: Nil Conflict of interest: None declared.