Validity, reliability, and reproducibility of plaster vs digital study models: Comparison of peer assessment rating and Bolton analysis and their constituent measurements

Stevens, Daron R.; Flores-Mir, Carlos; Nebbe, Brian; Raboud, Donald W.; Heo, Giseon; Major, Paul W.

doi:10.1016/j.ajodo.2004.08.023

Cited by 291 publications

(280 citation statements)

References 13 publications

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“…Plaster molds are considered the gold standard in orthodontic treatment due to their high accuracy and reliability. Comparative studies suggest no differences between computer-guided and manual measures [53,62]. The acetabular surface is only approximately spherical, with ellipsoid or conchoid deviations of the radius in the magnitude from \ 0.1 mm to 1.8 mm [5,13,25,42,56].…”

Section: Discussionmentioning

confidence: 99%

Acetabular Morphology: Implications for Joint-preserving Surgery

Köhnlein¹,

Ganz

Impellizzeri³

et al. 2009

Clinical Orthopaedics &Amp; Related Research

138

144

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Appropriate anatomic concepts for surgery to treat femoroacetabular impingement require a precise appreciation of the native acetabular anatomy. We therefore determined (1) the spatial acetabular rim profile, (2) the topography of the articular lunate surface, and (3) the 3-D relationships of the acetabular opening plane comparing 66 bony acetabula from 33 pelves in female and male pelves. The acetabular rim profile had a constant and regular wave-like outline without gender differences. Three prominences anterosuperiorly, anteroinferiorly and posteroinferiorly extended just above hemispheric level. Two depressions were below hemispheric level, of 9°at the anterior wall and of 21°along the posterosuperior wall. In 94% of all acetabula, the deepest extent of the articular surface was within 30°of the anterosuperior acetabular sector. In 99% of men and in 91% of women, the depth of the articular surface was at least 55°along almost half of the upper acetabular cup. The articular surface was smaller in women than in men. The acetabular opening plane was orientated in 21°± 5°for version, 48°± 4°for inclination and 19°± 6°for acetabular tilt with no gender differences. We defined tilt as forward rotation of the entire acetabular cup around its central axis; because of interindividual variability of acetabular tilt, descriptions of acetabular lesions during surgery, CT scanning and MRI should be defined and recorded in relation to the acetabular notch. Acetabular tilt and pelvic tilt should be separately identified. We believe this information important for surgeons performing rim trimming in FAI surgery or performing acetabular osteotomies.

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Section: Discussionmentioning

confidence: 99%

Acetabular Morphology: Implications for Joint-preserving Surgery

Köhnlein¹,

Ganz

Impellizzeri³

et al. 2009

Clinical Orthopaedics &Amp; Related Research

138

144

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“…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

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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.)

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“…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

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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.

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Validity, reliability, and reproducibility of plaster vs digital study models: Comparison of peer assessment rating and Bolton analysis and their constituent measurements

Cited by 291 publications

References 13 publications

Acetabular Morphology: Implications for Joint-preserving Surgery

Acetabular Morphology: Implications for Joint-preserving Surgery

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

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

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