The short version
- 1Cusps are the pointed peaks; grooves are the valleys between them.
- 2Food sticks in grooves, which is why careful brushing matters there.
- 3Root numbers vary; your dentist sees them on X-rays.
The chewing surface
Each molar has raised cusps and carved grooves. Those grooves increase grinding power and also collect plaque if brushed past quickly.
Roots
Upper molars often have three roots; lower molars often have two. Variations are normal and show up on radiographs.
Why they matter
Losing a molar changes how you chew and can shift neighboring teeth over time. Prevention beats replacement.
Molariva note
General vocabulary only. We do not diagnose your teeth.
General information only. Molariva is not a dental or medical provider and this is not dental or medical advice. Talk with your own dentist about your situation. In an emergency, call 911. Updated October 30, 2026.