Journal article

Publication year: 2020

Pages: 2459-2468

Journal: Clinical Oral Investigations

Volume number: 24

Issue number: 7

ISSN: 1432-6981

eISSN: 1436-3771

DOI Link: https://doi.org/10.1007/s00784-019-03108-3

Publisher: Springer

Abstract: 
Objectives To investigate the marginal and internal fit of crowns, a new intraoral scanner-based digital approach for chairside measurement (D-IOS) was systematically analysed and compared with the conventional silicone replica technique (CV-SR) and digital 3D analysis software (D-GOM). Materials and methods Two models, representing different clinical situations, were constructed, and the first molar was prepared for a full-coverage crown. On the basis of an intraoral scan (Trios 3), copings of three different materials (non-precious alloy, zirconium dioxide, and resin composite) with two different cement spaces (80 mu m, 50 mu m) were manufactured. The fit of the copings was investigated by all three methods (CV-SR, D-IOS, D-GOM). Therefore, the cement space was visualized with low-viscosity silicone and digitalized with a second intraoral scan. Evaluation of fit by the D-IOS-method was measured in the intraoral scanner software, whereas for analysis by D-GOM, both intraoral scan datasets were transferred to 3D analysis software (GOM Inspect). The CV-SR-method was used as a control group. For all copings, the measurements were repeated five times. The data were analysed with ANOVA. Results No significant differences between the three evaluation methods and the coping materials were shown. However, in the occlusal area, the internal gap was significantly higher compared to the internal gap in the marginal and axial areas regardless of the cement space setting (p < .05). The target parameter of the cement spaces did not match the actual measured internal gaps. Conclusions All three evaluation methods and coping materials can be used for the measurement of fit within different clinical situations.

Harvard Citation style: Schlenz, M., Vogler, J., Schmidt, A., Rehmann, P. and Woestmann, B. (2020) Chairside measurement of the marginal and internal fit of crowns: a new intraoral scan-based approach, Clinical Oral Investigations, 24(7), pp. 2459-2468. https://doi.org/10.1007/s00784-019-03108-3

APA Citation style: Schlenz, M., Vogler, J., Schmidt, A., Rehmann, P., & Woestmann, B. (2020). Chairside measurement of the marginal and internal fit of crowns: a new intraoral scan-based approach. Clinical Oral Investigations. 24(7), 2459-2468. https://doi.org/10.1007/s00784-019-03108-3