Impact of Storage Temperature and Duration on Dimensional Stability and Mechanical Properties of 3D-Printed Implant Surgical Guides

Article Article scientifique Article Impact of Storage Temperature and Duration on Dimensional Stability and Mechanical Properties of 3D-Printed Implant Surgical Guides eng 2026-05-29 author Kim Sung-Jin 0009-0005-7738-4895 Department of Prosthodontics, Seoul National University School of Dentistry, Seoul, Republic of Korea. author Park Koungjin 0000-0002-2678-1912 Department of Prosthodontics, Seoul National University School of Dentistry, Seoul, Republic of Korea. 448061 author Daher René 0000-0002-1586-6224 Division of Cariology and Endodontology, University Clinics of Dental Medicine, University of Geneva, Geneva, Switzerland. 812125 CUMD - Clinique de cariologie et d'endodontie (CCAR) author Ahn Jin-Soo 0000-0001-6978-5342 Department of Dental Biomaterials Science, Seoul National University School of Dentistry, Seoul, Republic of Korea.,Dental Research Institute, Seoul National University School of Dentistry, Seoul, Republic of Korea. author Fehmer Vincent 0000-0002-1437-7066 Division of Fixed Prosthodontics, University Clinics of Dental Medicine, University of Geneva, Geneva, Switzerland. 833517 CUMD - Laboratoire odontotechnique (LABOD) author Lee Jae-Hyun 0000-0002-2631-7722 Department of Prosthodontics, Seoul National University School of Dentistry, Seoul, Republic of Korea.,Dental Research Institute, Seoul National University School of Dentistry, Seoul, Republic of Korea. 936883 10.1111/jerd.70198 42210802 1496-4155 Objective: This study aimed to evaluate the impact of storage temperature and duration on the dimensional stability and mechanical properties of 3D-printed surgical guides. Materials and methods: Sixty surgical guides were designed using two software programs (3Shape and SMOP) and printed with NextDent SG resin. Specimens were stored at 2°C, 20°C, and 30°C (n = 10). Scans were performed at baseline and after 2, 4, and 6 weeks to assess dimensional stability by using root mean square (RMS) deviation. Additionally, 30 bar-shaped and 30 disk-shaped specimens were printed (n = 10) to evaluate flexural strength, flexural modulus, and hardness after 6 weeks of storage at the respective temperatures. Results: Storage temperature had no significant effect on dimensional stability for 3Shape or SMOP. However, RMS values increased significantly from 2 to 6 weeks for both groups. In standardized mechanical specimens, storage temperature significantly affected flexural strength (p < 0.001) and flexural modulus (p = 0.018), but not Vickers hardness (p = 0.126). Flexural strength was highest at 30°C, while 2°C and 20°C did not differ significantly (p = 0.772). Flexural modulus was higher at 20°C than at 2°C (p = 0.038). Conclusions: Storage temperature did not affect dimensional stability or hardness but influenced flexural properties in standardized specimens. Time-dependent dimensional changes were detected. Based on mechanical data, storage at 20°C or 30°C may be preferable to refrigeration for maintaining flexural performance. Clinical significance: 3D-printed surgical guides demonstrated dimensional stability across varying storage temperatures, although time-dependent deviations were detected. Based on standardized mechanical specimens, refrigeration may not provide mechanical benefits compared with room-temperature storage. Therefore, room-temperature storage may be preferable when delayed use is expected, even in warmer climates. Computer‐assisted surgery Hardness Temperature Three‐dimensional printing Time factors Dewey 617.6 Seoul National University Dental Hospital 04-2023-0125 National Research Foundation of Korea RS-2025-24803070 205 Division de cariologie et d'endodontie 24P1 210 Division de prothèse fixe et biomatériaux 24Q2 false Journal of esthetic and restorative dentistry 0931974f-b351-458f-9d7e-5867738430f1 Article (Published version) Public 10687.pdf 1467760 application/pdf CC BY-4.0 2500d7a3b22c205b7710282ec0f48f058e3b6d4605376a2eabdd3822304cc053 openAccess Faculté de médecine / Section de médecine dentaire / Département de médecine dentaire préventive et de premier recours / Division de cariologie et d'endodontie Faculté de médecine / Section de médecine dentaire / Département de réhabilitation oro-faciale / Division de prothèse fixe et biomatériaux

Title	Published in	Access level	OA Policy	Year	Views	Downloads

Impact of Storage Temperature and Duration on Dimensional Stability and Mechanical Properties of 3D-Printed Implant Surgical Guides	Journal of esthetic and restorative dentistry			2026	1	0

Archive ouverte UNIGE

Park, Koungjin