How the Build Angle Affects the Marginal and Internal Fit of 3D Printed Definitive FPDs: An in Vitro Study
JOURNAL OF ESTHETIC AND RESTORATIVE DENTISTRY, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Basım Tarihi: 2026
- Doi Numarası: 10.1111/jerd.70215
- Dergi Adı: JOURNAL OF ESTHETIC AND RESTORATIVE DENTISTRY
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, CINAHL, EMBASE, MEDLINE, Academic Search Ultimate (EBSCO), Natural Science Collection (ProQuest), Biological Science Database (ProQuest), Biomedical Reference Collection: Corporate Edition (EBSCO), Health Research Premium Collection (ProQuest)
- Gazi Üniversitesi Adresli: Evet
Özet
Statement of Problem: Printing parameters may influence the fit of additively manufactured dental restorations. However, the effect of small incremental build angles on the marginal and internal fit of stereolithography (SLA)-printed definitive 3-unit fixed partial dentures (FPDs) has not been sufficiently investigated. Purpose: The purpose of this in vitro study was to evaluate the effect of small incremental build angles (0 degrees, 10 degrees, 20 degrees, and 30 degrees) on the marginal and internal fit of SLA-printed definitive 3-unit FPDs. Material and Methods: A typodont maxillary first premolar and first molar were prepared to serve as abutments for a 3-unit FPD. After digital scanning, restorations were designed using dental CAD software and fabricated from a definitive resin using an SLA printer. Forty FPDs were produced at four different build angles (0 degrees, 10 degrees, 20 degrees, and 30 degrees) (n = 10). Marginal and internal fit were evaluated using microcomputed tomography. Gap measurements were obtained at five reference points for each abutment. Data were analyzed using one-way analysis of variance followed by Tukey honestly significant difference post hoc tests (alpha = 0.05). Results: Build angle significantly affected the marginal and internal fit (p < 0.05). For both molar and premolar supports, the highest fit was achieved with 30 degrees, followed by 20 degrees. Differences between 20 degrees-30 degrees and 0 degrees-10 degrees were not statistically significant (p > 0.05). The marginal discrepancy was higher than the internal discrepancy. Conclusions: Within the limitations of this in vitro study, build angle influenced the marginal and internal fit of SLA-printed 3-unit FPDs. Among the orientations tested, the 30 degrees build angle generally produced the smallest gap values.