The influence of layer thickness over time on the dimensional stability of 3D printed crown lengthening guides

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dc.contributor.advisorPadayachee, Sankeshan
dc.contributor.authorQaddoura, Karim
dc.date.accessioned2025-02-21T09:16:52Z
dc.date.available2025-02-21T09:16:52Z
dc.date.issued2024
dc.description.abstractBackground: Guided surgery offers a higher level of accuracy compared to freehand surgery providing precision and improved surgical outcomes when used for clinical crown lengthening procedures. The dimensional stability of 3D printed guides during storage and handling is important and may be influenced by factors such as layer thickness and post-processing time. Root mean square is used to measure the accuracy of the guide and represent dimensional stability. Aim: This study aims to evaluate the influence of layer thickness on the dimensional stability of 3D printed crown lengthening guides at different time periods. Methods: An in-vitro experimental study design used 22 3D printed crownlengthening surgical guides in two different layer thicknesses, constituting 11 50(LT) samples and 11 (100LT) samples, respectively, were scanned at 5 time intervals (T0) immediately post-processing, after (T1) day 5, (T2) day10, (T3) day15, and (T4) day 20. The corresponding standard tessellation language (STL) files were compared with the reference (STL) file. For each thickness group, the mean of the root mean square was plotted across the different time intervals. A regression analysis was conducted with "root mean square" as the dependent variable and "Comparison" as the independent variable. The independent variable (Comparison) had four categories (levels): T0 – T1, T0 – T2, T0 – T3, and T0 – T4. All tests were deemed statistically significant at p<0.05.
dc.identifier.urihttps://hdl.handle.net/10566/20106
dc.language.isoen
dc.publisherUniversity of the Western Cape
dc.subject3D printed guide
dc.subjectCrown lengthening guide
dc.subjectDimensional stability
dc.subjectGuide storage
dc.subjectLayer thickness
dc.titleThe influence of layer thickness over time on the dimensional stability of 3D printed crown lengthening guides
dc.typeThesis

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Magister Chirurgiae Dentium - MChD (Oral Medicine and Periodontics)