Kumar A Anand, Ananthakrishnan M G, Kumar Sathesh, Divakar G, Sekar Sharmila, Dharani S
Department of Orthodontics, JKK Nattraja Dental College and Hospitals, Namakkal, Tamil Nadu, India.
Private Practitioner, Tamil Nadu, India.
J Pharm Bioallied Sci. 2022 Jul;14(Suppl 1):S148-S151. doi: 10.4103/jpbs.jpbs_735_21. Epub 2022 Jul 13.
The aim of the study is to compare and evaluate the validity and reliability of tooth widths and Bolton ratios measured from digital models obtained from intraoral scanners and plaster models derived from alginate and polyvinyl siloxane impression materials.
Alginate and polyvinylsiloxane impression was taken for 40 subjects, orthokal stone was poured and grouped as Group I and Group II, respectively. Intraoral scanning was done using Trios Pod 3shape for the same patients, digital models were obtained and grouped as Group III. OrthoAnalyzer software was used for obtaining measurements in digital models and Aerospace Vernier calipers in plaster models. The validity and reliability of the three groups were quantified and compared.
Validity measurements showed significant differences between tooth widths and Bolton ratios obtained from digital models and plaster models indicating higher accuracy for plaster models whereas reliability coefficients were excellent for digital models indicating better reproducibility of values.
The study shows significant differences in accuracy on measuring with vernier calipers and Orthoanalyzer software showing plaster models are still better than digital models for measuring tooth widths and bolton ratios.
本研究旨在比较和评估从口腔内扫描仪获取的数字模型以及由藻酸盐和聚乙烯基硅氧烷印模材料制成的石膏模型所测量的牙宽度和Bolton比率的有效性和可靠性。
对40名受试者取藻酸盐和聚乙烯基硅氧烷印模，灌注超硬石膏并分别分为I组和II组。对相同患者使用Trios 3shape口内扫描仪进行口内扫描，获取数字模型并分为III组。使用OrthoAnalyzer软件在数字模型上进行测量，在石膏模型上使用航空游标卡尺进行测量。对三组的有效性和可靠性进行量化和比较。
有效性测量显示，从数字模型和石膏模型获得的牙宽度和Bolton比率之间存在显著差异，表明石膏模型的准确性更高，而数字模型的可靠性系数极佳，表明数值的可重复性更好。
该研究表明，使用游标卡尺和Orthoanalyzer软件进行测量时，准确性存在显著差异，表明在测量牙宽度和Bolton比率方面，石膏模型仍优于数字模型。
