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2026, Vol: 51, Issue: 3
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Original Research 


An evaluation of printing orientation on the trueness and dimensional accuracy of two resin materials over nine months

Shilan Hameed Fatah, Bahar Jaafar Selivany, Nabeel Abdulla S. Martani.


Abstract
Objective: To evaluate the effect of printing orientation on the dimensional accuracy, trueness, and 9-month stability of two 3D-printed dental resins.
Methodology: In this in vitro study, 108 specimens of Model Resin Material (MRM) and Interim Prosthesis Material (IPM) were printed at 0°, 45°, and 90° (n=9/group). Specimens were scanned immediately and after nine months using a 3Shape lab scanner. Dimensional accuracy was assessed by linear measurements and trueness by RMS deviation using GOM Inspect. Data were analyzed with ANOVA (α=0.05).
Results: Printing orientation had no significant effect on dimensional accuracy or trueness (p>0.05). All groups showed significant post printing shrinkage (p<0.05). IPM demonstrated better trueness (0.231±0.051 mm) than MRM (0.498±0.168 mm; p=0.001) and maintained superior dimensional stability after nine months (p=0.001).
Conclusion: Printing orientation minimally affects accuracy. IPM shows better trueness and long term stability than MRM, and surface based analysis detects deviations not identified by linear measurements.

Key words: 3D printing, interim prostheses, printing orientation, dimensional accuracy, trueness.


 
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How to Cite this Article
Pubmed Style

Fatah SH, Selivany BJ, Martani NAS. An evaluation of printing orientation on the trueness and dimensional accuracy of two resin materials over nine months. RMJ. 2026; 51(3): 708-711. doi:10.5455/rmj.20260323051732

Web Style

Fatah SH, Selivany BJ, Martani NAS. An evaluation of printing orientation on the trueness and dimensional accuracy of two resin materials over nine months. https://www.rmj.org.pk/?mno=314801 [Access: August 19, 2026]. doi:10.5455/rmj.20260323051732

AMA (American Medical Association) Style

Fatah SH, Selivany BJ, Martani NAS. An evaluation of printing orientation on the trueness and dimensional accuracy of two resin materials over nine months. RMJ. 2026; 51(3): 708-711. doi:10.5455/rmj.20260323051732


Vancouver/ICMJE Style

Fatah SH, Selivany BJ, Martani NAS. An evaluation of printing orientation on the trueness and dimensional accuracy of two resin materials over nine months. RMJ. (2026), [cited August 19, 2026]; 51(3): 708-711. doi:10.5455/rmj.20260323051732


Harvard Style

Fatah, S. H., Selivany, . B. J. & Martani, . N. A. S. (2026) An evaluation of printing orientation on the trueness and dimensional accuracy of two resin materials over nine months. RMJ, 51 (3), 708-711. doi:10.5455/rmj.20260323051732


Turabian Style

Fatah, Shilan Hameed, Bahar Jaafar Selivany, and Nabeel Abdulla S. Martani. 2026. An evaluation of printing orientation on the trueness and dimensional accuracy of two resin materials over nine months. Rawal Medical Journal, 51 (3), 708-711. doi:10.5455/rmj.20260323051732


Chicago Style

Fatah, Shilan Hameed, Bahar Jaafar Selivany, and Nabeel Abdulla S. Martani. "An evaluation of printing orientation on the trueness and dimensional accuracy of two resin materials over nine months." Rawal Medical Journal 51 (2026), 708-711. doi:10.5455/rmj.20260323051732


MLA (The Modern Language Association) Style

Fatah, Shilan Hameed, Bahar Jaafar Selivany, and Nabeel Abdulla S. Martani. "An evaluation of printing orientation on the trueness and dimensional accuracy of two resin materials over nine months." Rawal Medical Journal 51.3 (2026), 708-711. Print. doi:10.5455/rmj.20260323051732


APA (American Psychological Association) Style

Fatah, S. H., Selivany, . B. J. & Martani, . N. A. S. (2026) An evaluation of printing orientation on the trueness and dimensional accuracy of two resin materials over nine months. Rawal Medical Journal, 51 (3), 708-711. doi:10.5455/rmj.20260323051732


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