研究目的
To propose the use of swept-source optical coherence tomography (SS-OCT) for non-ionized and high-resolution measurements of internal and marginal discrepancies in dental prostheses.
研究成果
SS-OCT provides a non-destructive, non-ionized, and high-resolution method for measuring internal and marginal discrepancies in dental prostheses, with potential for clinical application despite depth penetration limitations. The method offers advantages over existing techniques like Micro-CT by avoiding radiation exposure.
研究不足
The depth penetration of OCT has certain limitations for clinical utility, and the study involved a single tooth model instead of multiple specimens, which may affect generalizability. Resolution limitations of the OCT system required averaging over multiple points for reliability.
1：Experimental Design and Method Selection:
The study utilized SS-OCT for non-destructive imaging and quantitative analysis of discrepancies between dental prosthesis and abutment. A software program coded in MATLAB was used for intensity peak profile analysis to measure distances.
2：Sample Selection and Data Sources:
A tooth model based on a master model of the first molar in the upper left jaw was fabricated using 3D printing. The dental prosthesis was designed with dental CAD software and milled from a zirconia block.
3：List of Experimental Equipment and Materials:
SS-OCT system (OCS1310V1, Thorlabs), 3D printer (ZENITH, Dentis), model scanner (FREEDOMHD, DOF), dental CAD software (Exocad, Exocad GmbH), milling machine (Ceramill Motion 2, Amann Girrbach), zirconia block (Ceramill Zolid, Amann Girrbach), MATLAB software (MathWorks).
4：Experimental Procedures and Operational Workflow:
The tooth model and prosthesis were prepared; OCT scans were performed from buccal to lingual, mesial to distal, and at specific sites to capture images. Intensity profiles were analyzed using custom MATLAB code to measure discrepancy distances.
5：Data Analysis Methods:
Intensity peak profiles were averaged, normalized, and peak-to-peak distances were measured to quantify discrepancies. Mean values and standard deviations were calculated for different sites.
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