Accuracy of space analysis with emodels and plaster models

Mullen, S. Russell; Martin, Chris; Ngan, Peter; Gladwin, Marcia

doi:10.1016/j.ajodo.2005.08.044

Cited by 146 publications

(128 citation statements)

References 10 publications

Supporting

Mentioning

109

Contrasting

Unclassified

Order By: Relevance

“…The overall conclusion of these studies is that digital models are acceptable alternatives to stone casts for the routine measurements used in orthodontic practice. [22][23][24][25][26][27][28][29][30][31][32][33][34] On the other hand, no study has evaluated the possible time-dependent deformation of alginate impressions during their shipment to the companies involved.…”

Section: Introductionmentioning

confidence: 99%

The Relationship between Digital Model Accuracy and Time-Dependent Deformation of Alginate Impressions

Alcan

Ceylanoğlu²,

Baysal³

2009

The Angle Orthodontist

View full text Add to dashboard Cite

Objectives: To investigate the effects of different storage periods of alginate impressions on digital model accuracy. Materials and Methods: A total of 105 impressions were taken from a master model with three different brands of alginates and were poured into stone models in five different storage periods. In all, 21 stone models were poured and immediately were scanned, and 21 digital models were prepared. The remaining 84 impressions were poured after 1, 2, 3, and 4 days, respectively. Five linear measurements were made by three researchers on the master model, the stone models, and the digital models. Time-dependent deformation of alginate impressions at different storage periods and the accuracy of traditional stone models and digital models were evaluated separately. Results: Both the stone models and the digital models were highly correlated with the master model. Significant deformities in the alginate impressions were noted at different storage periods of 1 to 4 days. Alginate impressions of different brands also showed significant differences between each other on the first, third, and fourth days. Conclusions: Digital orthodontic models are as reliable as traditional stone models and probably will become the standard for orthodontic clinical use. Storing alginate impressions in sealed plastic bags for up to 4 days caused statistically significant deformation of alginate impressions, but the magnitude of these deformations did not appear to be clinically relevant and had no adverse effect on digital modeling. (Angle Orthod. 2009;79:30-36.)

show abstract

Section: Introductionmentioning

confidence: 99%

The Relationship between Digital Model Accuracy and Time-Dependent Deformation of Alginate Impressions

Alcan

Ceylanoğlu²,

Baysal³

2009

The Angle Orthodontist

View full text Add to dashboard Cite

show abstract

“…8,9 Digital models have a number of advantages in terms of storage, retrieval, diagnostic versatility, transferability, and durability. 10,11 Numerous studies have shown that 3D digital models can be used for model analysis and diagnosis, 10,[12][13][14][15][16] treatment planning, 8,17 design and manufacture of orthodontic appliances, [18][19][20] and evaluation of tooth movement. [21][22][23][24] To date, however, studies of the reliability of computed superimposition of 3D digital models to assess the outcomes of orthodontic treatments have been limited.…”

Section: Introductionmentioning

confidence: 99%

Accuracy and reliability of palatal superimposition of three-dimensional digital models

Choi¹,

Jeong²,

Jang³

et al. 2010

The Angle Orthodontist

View full text Add to dashboard Cite

Objective: To evaluate the accuracy of the superimposition of three-dimensional (3D) digital models using the palatal surface as a reference for measuring tooth movements. Materials and Methods: Maxillary plaster models were selected from 20 patients. The right and left canines, premolars, and molars were individually cut underneath the gingival margins and set up in wax (plaster model 1 5 PM1). The PM1s were scanned to create 3D digital models (digital model 1 5 DM1). Teeth on the PM1s were randomly moved (plaster model 2 5 PM2) and subsequently scanned to produce another set of 3D digital models (digital model 2 5 DM2). DM1s and DM2s were superimposed using the palatal area as reference via surface-to-surface matching software, and the changes in tooth movement were calculated. In the plaster models, the tooth movements were directly measured using the Reference Measurement Instrument. A paired t-test and a correlation analysis were performed to determine whether the two measurement methods differed significantly. Results: The means of the anteroposterior (x-axis), transverse (y-axis), and vertical (z-axis) tooth movements of the plaster models and the digital models did not differ significantly, and very high correlations were found between the plaster models and the digital models. Conclusion: From a technical point of view, the superimposition of 3D digital models using the palatal surface provides accurate and reliable measurements, but it remains to be investigated how stable the palatal surface is longitudinally after growth and/or orthopedic treatment take place. (Angle Orthod. 2010;80:685-691.)

show abstract

“…2 On the other hand, other investigators found excellent reproducibility of digital models and significant differences in some measurements regarding reliability and validity, but these were not considered clinically significant. 10,11 Cécile3, a digital modeling analysis software, was created in 2003 by Bibliocast, Montreuil. Some advantages of this software include the possibility of performing space analysis and creating virtual setups for treatment planning purposes.…”

Section: Introductionmentioning

confidence: 99%

Reproducibility, reliability and validity of measurements obtained from Cecile3 digital models

et al. 2009

View full text Add to dashboard Cite

The aim of this study was to determine the reproducibility, reliability and validity of measurements in digital models compared to plaster models. Fifteen pairs of plaster models were obtained from orthodontic patients with permanent dentition before treatment. These were digitized to be evaluated with the program Cécile3 v2.554.2 beta. Two examiners measured three times the mesiodistal width of all the teeth present, intercanine, interpremolar and intermolar distances, overjet and overbite. The plaster models were measured using a digital vernier. The t-Student test for paired samples and interclass correlation coefficient (ICC) were used for statistical analysis. The ICC of the digital models were 0.84 ± 0.15 (intra-examiner) and 0.80 ± 0.19 (inter-examiner). The average mean difference of the digital models was 0.23 ± 0.14 and 0.24 ± 0.11 for each examiner, respectively. When the two types of measurements were compared, the values obtained from the digital models were lower than those obtained from the plaster models (p < 0.05), although the differences were considered clinically insignificant (differences < 0.1 mm). The Cécile digital models are a clinically acceptable alternative for use in Orthodontics.

show abstract

Accuracy of space analysis with emodels and plaster models

Cited by 146 publications

References 10 publications

The Relationship between Digital Model Accuracy and Time-Dependent Deformation of Alginate Impressions

The Relationship between Digital Model Accuracy and Time-Dependent Deformation of Alginate Impressions

Accuracy and reliability of palatal superimposition of three-dimensional digital models

Reproducibility, reliability and validity of measurements obtained from Cecile3 digital models

Contact Info

Product

Resources

About