Determination of tooth-size discrepancy and Bolton ratios using bibliocast Cécile3 digital models.
Summary of "Determination of tooth-size discrepancy and Bolton ratios using bibliocast Cécile3 digital models."
The purpose of this study was to compare digitized models with their current gold-standard plaster models for tooth-size discrepancy and Bolton analysis. Fifteen pairs of plaster models were obtained from orthodontic patients with permanent dentition. These were digitized and evaluated using the Bibliocast Cécile3 v2.5 software. Two examiners measured three times the mesiodistal width of all the teeth and the arch length, and determined the tooth-size discrepancy and Boltons ratios. The plaster models were measured using a digital vernier caliper. Interclass correlation (ICC), mean differences and paired t-tests were used for comparisons and statistical analysis. The ICC of the digital models were 0.930 (0.852=ICC<0.973) for the intra-examiner and 0.929 (0.829=CCI<0.974) for the inter-examiner. The mean differences between plaster and digital models with respect to the anterior and overall Boltons ratios for examiner 1 was 0.34mm for both and for examiner 2 were 0.28mm and 0.21mm respectively. Although digital model measurements were lower than plaster (p<0.05), these were considered clinically insignificant (differences<0.1mm). The determination of the tooth-size discrepancy and Bolton analysis using digital models and the Bibliocast Cécile3 software are an acceptable alternative to use in clinical practice.
MSc Student, Orthodontic Post Graduate Program, School of Dentistry, University of São Paulo, São Paulo, Brazil.
This article was published in the following journal.
Name: International orthodontics / College europeen d'orthodontie
- PubMed Source: http://www.ncbi.nlm.nih.gov/pubmed/20739241
- DOI: http://dx.doi.org/10.1016/j.ortho.2010.07.014
Medical and Biotech [MESH] Definitions
The pathologic wearing away of the tooth substance by brushing, bruxism, clenching, and other mechanical causes. It is differentiated from TOOTH ATTRITION in that this type of wearing away is the result of tooth-to-tooth contact, as in mastication, occurring only on the occlusal, incisal, and proximal surfaces. It differs also from TOOTH EROSION, the progressive loss of the hard substance of a tooth by chemical processes not involving bacterial action. (From Jablonski, Dictionary of Dentistry, 1992, p2)
The wearing away of a tooth as a result of tooth-to-tooth contact, as in mastication, occurring only on the occlusal, incisal, and proximal surfaces. It is chiefly associated with aging. It is differentiated from TOOTH ABRASION (the pathologic wearing away of the tooth substance by friction, as brushing, bruxism, clenching, and other mechanical causes) and from TOOTH EROSION (the loss of substance caused by chemical action without bacterial action). (Jablonski, Dictionary of Dentistry, 1992, p86)
The upper part of the tooth, which joins the lower part of the tooth (TOOTH ROOT) at the cervix (TOOTH CERVIX) at a line called the cementoenamel junction. The entire surface of the crown is covered with enamel which is thicker at the extremity and becomes progressively thinner toward the cervix. (From Jablonski, Dictionary of Dentistry, 1992, p216)
A fabricated tooth substituting for a natural tooth in a prosthesis. It is usually made of porcelain or plastic.
The constricted part of the tooth at the junction of the crown and root or roots. It is often referred to as the cementoenamel junction (CEJ), the line at which the cementum covering the root of a tooth and the enamel of the tooth meet. (Jablonski, Dictionary of Dentistry, 1992, p530, p433)
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