Digital models for the analysis of little’s irregularity index in subjects with a different degree of crowding: A reproducibility study
| Autor: | Lorenzo Rustico, Riccardo Nucera, Paola Campagna, Grazia Fichera, Stefano Martina, Giuseppe Palazzo, Vincenzo Ronsivalle |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Intraclass correlation
digital models Little’s index space analysis arch length discrepancy dental crowding digital dentistry Dental crowding lcsh:Technology lcsh:Chemistry 03 medical and health sciences 0302 clinical medicine General Materials Science Space analysis Arch Arch length discrepancy Dental crowding Digital dentistry Digital models Little’s index Space analysis Digital models lcsh:QH301-705.5 Instrumentation Mathematics Fluid Flow and Transfer Processes Orthodontics Reproducibility lcsh:T Process Chemistry and Technology General Engineering 030206 dentistry Gold standard (test) Crowding lcsh:QC1-999 Computer Science Applications Digital dentistry lcsh:Biology (General) lcsh:QD1-999 lcsh:TA1-2040 030220 oncology & carcinogenesis Calipers lcsh:Engineering (General). Civil engineering (General) Arch length discrepancy lcsh:Physics |
| Zdroj: | Applied Sciences Volume 10 Issue 20 Applied Sciences, Vol 10, Iss 7108, p 7108 (2020) |
| Popis: | Background: To investigate the accuracy and reproducibility of digital measurements of Little&rsquo s Irregularity Index and to evaluate if different degrees of dental crowding could influence these measurements. Methods: The study included 40 dental models and 5 sub-groups were created according to the severity of the crowding. In both the digital models and the study cast, Little&rsquo s Irregularity Index was recorded by measuring (1) the mesiodistal width of each tooth and (2) the arch lengths in both the maxillary and mandibular jaw. Two operators performed measurements on plaster and digital models using, respectively, a digital caliper and OrthoAnalyzerTM 3D software (3Shape A/S, Copenhagen, Denmark). Statistical analysis was performed to assess intra- and inter-operator variability, the accuracy between manual and digital measurements and if the amount of crowding could affect the accuracy of the digital measurements. Results: Concerning intra-examiner reliability, no statistically significant differences were detected (p > 0.05). In the maxillary and mandibular arch, the Intraclass Correlation Coefficient (ICC) value was 0.996 and 0.997 for the analogic measurements and 0.998 and 0.978 for the digital measurements. For the maxillary arch, the mean difference between the analogic and digital Little&rsquo s Irregularity Index (LII) measurements was 0.43 mm while for the mandibular arch the mean difference was 0.24 mm, showing some overestimation of the digital measurements (p < 0.05). No differences were found according to crowding subgroups (p > 0.05). Conclusions: Digital measurements of LII could be considered as a valid substitute of the gold standard analogical measurement. |
| Databáze: | OpenAIRE |
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