Layer Thickness and Viscosity Influence 3D-Printed Resin Surfaces
2026 Continental European Division (Lisbon, Portugal), Lisbon, Portekiz, 3 - 05 Eylül 2026, ss.0-1, (Özet Bildiri)
- Yayın Türü: Bildiri / Özet Bildiri
- Basıldığı Şehir: Lisbon
- Basıldığı Ülke: Portekiz
- Sayfa Sayıları: ss.0-1
- Kocaeli Üniversitesi Adresli: Evet
Özet
Objectives: This study evaluated the interactive effects of layer thickness and resin viscosity on surface roughness, wettability, and progressive load scratch behavior of 3D-printed definitive crown resins.
Methods: Three experimental resins (400-600, 1000-1500, and 2000-2500 mPas) and one commercial resin were printed at 50 µm and 100 µm. Surface roughness (Ra, Rz) and water contact angle were measured using a noncontact profilometer and the sessile drop method. A progressive load scratch test (0.1–10 N) was used to measure the coefficient of friction (COF), the residual scratch depth, and the scratch morphology.
Results: Resin type and layer thickness significantly affected Ra and Rz, with a significant interaction (P<.001). Increasing layer thickness to 100 µm increased surface roughness, particularly in the high-viscosity groups. Frictional behavior varied with resin viscosity and layer thickness. At 50 µm, the medium-viscosity group showed the most unstable COF response, whereas at 100 µm, the high-viscosity group exhibited pronounced stick-slip instability and greater residual depth. The water contact angle was affected by resin type (P=.011) but not by layer thickness (P=.615).
Conclusions: Layer thickness and resin viscosity exhibit a significant interaction influencing surface roughness and scratch behavior of 3D-printed definitive crown resins. Increasing layer thickness in high-viscosity resins may have more pronounced effects on surface topography and tribological behavior.
Methods: Three experimental resins (400-600, 1000-1500, and 2000-2500 mPas) and one commercial resin were printed at 50 µm and 100 µm. Surface roughness (Ra, Rz) and water contact angle were measured using a noncontact profilometer and the sessile drop method. A progressive load scratch test (0.1–10 N) was used to measure the coefficient of friction (COF), the residual scratch depth, and the scratch morphology.
Results: Resin type and layer thickness significantly affected Ra and Rz, with a significant interaction (P<.001). Increasing layer thickness to 100 µm increased surface roughness, particularly in the high-viscosity groups. Frictional behavior varied with resin viscosity and layer thickness. At 50 µm, the medium-viscosity group showed the most unstable COF response, whereas at 100 µm, the high-viscosity group exhibited pronounced stick-slip instability and greater residual depth. The water contact angle was affected by resin type (P=.011) but not by layer thickness (P=.615).
Conclusions: Layer thickness and resin viscosity exhibit a significant interaction influencing surface roughness and scratch behavior of 3D-printed definitive crown resins. Increasing layer thickness in high-viscosity resins may have more pronounced effects on surface topography and tribological behavior.