Effect of manufacturing trinomial and preparation design on the fabrication and fit accuracy of additively and subtractively manufactured resin-based overlay restorations

Dede D. Ö., Zeller D. K., Demirel M., Al-Johani H., Schimmel M., Çakmak G., ...Daha Fazla

Journal of Dentistry, cilt.157, 2025 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 157
  • Basım Tarihi: 2025
  • Doi Numarası: 10.1016/j.jdent.2025.105687
  • Dergi Adı: Journal of Dentistry
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, CAB Abstracts, CINAHL, Communication Abstracts, Metadex, Veterinary Science Database, Civil Engineering Abstracts
  • Anahtar Kelimeler: Accuracy, Fit, Manufacturing trinomial, Overlay, Preparation design
  • Lokman Hekim Üniversitesi Adresli: Hayır

Özet

Objective: To evaluate the effect of the manufacturing trinomial (technology, printer, and resin) and preparation design on the fabrication and fit accuracy (trueness and precision) of additively manufactured (AM) resin-based overlays compared to subtractively manufactured (SM) overlays. Methods: Six mandibular right first molar typodont teeth were prepared with varying designs: (A) 1 mm occlusal reduction, (B) 1.5 mm occlusal reduction, (C) B + contrabevel finish line, (D) B + chamfer finish line, (E) C + proximal box, and (F) D + proximal box. Overlays were fabricated using AM-IX (tilting stereolithography), AM-VS (digital light processing), or SM-EN and digitized for fabrication (overall, external, intaglio, marginal) and internal fit accuracy analyses. Data were analyzed with two-way analysis of variance and Bonferroni-corrected post-hoc tests (α = 0.05). Results: The interaction between the manufacturing trinomial and preparation design affected fabrication accuracy of overall, external, and intaglio surfaces, and the precision of marginal surface deviations and average gaps (P ≤ 0.034). AM-IX overlays mostly had higher overall, external, and marginal fabrication accuracy, whereas SM-EN overlays mostly had lower accuracy across these surfaces (P ≤ 0.019). Preparation designs A, B, and C mostly led to lower overall, external, and intaglio surface trueness within SM-EN overlays (P ≤ 0.014). AM-IX overlays had the lowest and preparation design E led to the highest gaps (P ≤ 0.023). Conclusions: AM overlays fabricated with tilting stereolithography mostly had higher fabrication and fit accuracy. Increased axial preparation improved fabrication trueness but did not consistently enhance fit.