Accuracy of digital jaw relation determination in different occlusal conditions - an in vitro study.

Autor: Hellmann D; Department of Prosthodontics, University of Würzburg, Pleicherwall 2, 97070, Würzburg, Germany. daniel.hellmann@uni-wuerzburg.de.; Dental Academy for Continuing Professional Development, Karlsruhe, Germany. daniel.hellmann@uni-wuerzburg.de., Knoch FM; Department of Orthodontics, Ulm University, Ulm, Germany., Repky S; Institute of Epidemiology and Medical Biometry, Ulm University, Ulm, Germany., Kilic F; Department of Orthodontics, Ulm University, Ulm, Germany., Lapatki BG; Department of Orthodontics, Ulm University, Ulm, Germany., Radeke J; Department of Orthodontics, Ulm University, Ulm, Germany.
Jazyk: angličtina
Zdroj: Clinical oral investigations [Clin Oral Investig] 2024 Dec 14; Vol. 29 (1), pp. 16. Date of Electronic Publication: 2024 Dec 14.
DOI: 10.1007/s00784-024-06101-7
Abstrakt: Objectives: In orthodontics, accurate registration of jaw relationships is essential for correct diagnosis and treatment planning. Therefore, accuracy of the digital spatial registration of maxillary and mandibular models and - for the first time-the influence of dentition stage and malocclusion type on this procedure were investigated under controlled conditions.
Materials and Methods: Eight pairs of jaw models, representing different occlusal and developmental statuses (m1-m8), were scanned using two IOS types (PS: Primescan; TR: Trios4). Buccal scans for registering maxillary and mandibular models were repeated (n = 3). Reference scans were obtained using a desktop scanner (RDS; Ceramill Map 600). Arch-specific 3D coordinate systems were used to calculate the linear and angular deviations among different registrations. Trueness of registration by PS and TR was calculated using a statistical mixed-effect model (random-effect: model-type). Precision values of IOS registrations across m1-m8 were characterized as standard deviations (SDs).
Results: As maximum deviations compared to RDS, PS showed caudal translation (0.11 ± 0.02 mm), while TR showed ventral translation (0.08 ± 0.06 mm), of the maxillary relative to the mandibular model. Maximum rotational values were calculated for tilting around the transverse axis (PS: anteinclination (0.25 ± 0.16°), TR: retroinclination (0.27 ± 0.16°)). These deviations varied with the malocclusion type. The lowest IOS precision was recorded for sagittal translation (PS: 0.013 ± 0.005 mm, TR: 0.021 ± 0.010 mm) and rotation around the transverse axis (PS: 0.051 ± 0.013°, TR: 0.076 ± 0.031°).
Conclusions and Clinical Relevance: Registrations using buccal IOS scans showed quantifiable but clinically negligible 3D deviations from reference scan registrations, whereby the type of tooth and jaw misalignment did not appear to have a clinically relevant influence. Therefore, the examined IOSs appear to be suitable for digital jaw relation determination in everyday clinical orthodontic practice.
Competing Interests: Declarations. Ethics approval and consent to participate: Not applicable. Competing interests: The authors declare no competing interests.
(© 2024. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
Databáze: MEDLINE
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