Post Space Calculator
Post length and diameter from root anatomy.
Medical Disclaimer
This calculator is for informational and educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making decisions about your health. Never disregard professional medical advice or delay seeking it because of results from this tool.
Inputs
Results
Recommended post length (mm)
12
Max post diameter (mm)1.3
Apical seal remaining (mm)4
Ferrule adequate (0/1)1
Drill size (Peeso #)2
Perforation risk (0-100)42
Ferrule Height2
How to Use This Calculator
- Enter Root Length (mm) and Root Diameter at mid-root (mm).
- Input Crown-to-Root Ratio and Remaining Coronal Structure (mm).
- Review Recommended Post Length (mm) — at least 4-5 mm of apical seal must remain.
- Check Maximum Post Diameter (mm) — must not exceed one-third of the root diameter at the narrowest point.
- Use Apical Seal Remaining (mm) to verify the post space preparation leaves adequate seal.
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