Volume 21 Issue 3
Mar.  2023
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Article Navigation >  Chinese Journal of General Practice  > 2023  >  21(3): 409-412
YIN Xiaoxuan, GAN Hongqin, TIAN Ruixue, XIE Xiaofei. Reliability evaluation of manual and digital measurements for orthodontic models under different crowding degrees[J]. Chinese Journal of General Practice, 2023, 21(3): 409-412. doi: 10.16766/j.cnki.issn.1674-4152.002895
Citation: YIN Xiaoxuan, GAN Hongqin, TIAN Ruixue, XIE Xiaofei. Reliability evaluation of manual and digital measurements for orthodontic models under different crowding degrees[J]. Chinese Journal of General Practice, 2023, 21(3): 409-412. doi: 10.16766/j.cnki.issn.1674-4152.002895
shu

Reliability evaluation of manual and digital measurements for orthodontic models under different crowding degrees

doi: 10.16766/j.cnki.issn.1674-4152.002895

  • Stomatology Department, the First Affiliated Hospital of Bengbu Medical College, Bengbu, Anhui 233004, China

Funds:

 KJ2021A0790

 BYKY2019019ZD

  • Received Date: 2022-05-19
    Available Online: 2023-04-19
    Abstract
  •   Objective  To evaluate the reliability and accuracy of digital measurement of dental model under different levels of crowding, so as to clarify the application prospect of digital model measurement in orthodontic clinical work.  Methods  A total of 30 sets of orthodontic plaster were selected as storage models in the Department of Orthodontics of the First Affiliated Hospital of Bengbu Medical College from September 2020 to September 2021, and 30 digital models were obtained by scanning the gypsum model. According to the crowding degree, they were divided into mild group (crowding degree ≤4 mm), moderate group (4 mm < crowding degree≤8 mm) and severe crowding group (crowding degree >8 mm), with 10 models in each group. The gypsum model was measured with vernier caliper, and the digital model was measured with corresponding software. The difference between the results of the two measurement methods when measuring relevant parameters was compared.  Results  In the mild crowding group, the difference between the 7 measurement values was statistically significant (P < 0.05): crown width, maxillary anterior arch length, mandibular posterior arch length, and palatal dome height at 14, 36, 44, and 46 positions. In the moderately crowded group, the difference between nine measurements was statistically significant (P < 0.05): Crown width, anterior length of maxillary arch, middle length of mandibular arch, overlaying, and measurement time at 16, 26, 36, 45, 46 positions. In the severe crowding group, the difference between the 10 measurements was statistically significant (P < 0.05): 15, 13, 12, 11, 23, 43 tooth position crown width, maxillary posterior arch width, mandibular arch middle length, overlying, measurement time. However, the difference between the above results was less than 1 mm.  Conclusion  Although the degree of dentition crowding has a certain influence on the measurement results of the digital model, it does not affect the development of clinical orthodontic plan. The digital model measurement can replace the traditional manual measurement method in clinical application.

     

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