By Dr. Shaun Weng
Published June 2026
10 min read
Clinical Summary
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Content
Sarig et al. 2015 measured the proximal enamel thickness (PET) of complete maxillary and mandibular dentition contact areas using extracted teeth
5 common features were found in both maxillary and mandibular arch
1. Thickness increased progressively from lower incisor (0.63mm) to first molar (1.48mm)
2. Anterior teeth PETs are <1mm, posterior teeth PETs are between 1.1mm and 1.5mm
3. PETs of both maxillary and mandibular teeth were similar (except for incisors)
4. Only the PETs of the lateral incisor – canine interface are different (the other adjacent PETs are similar)
5. The contact area becomes located more gingival progressively from incisor to first molar.
Conclusions
• Guideline of maximal IPR of 0.5mmbetween anterior teeth.
• In the posterior teeth 1mm maximumcould be removed (presuming an equal amount is removed from each side)
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