Capstone: #19 / 36

Mark a margin, set insertion, seat anatomy, and read the contact map on a mandibular first molar.

Objectives

Complete a single-unit workflow on a mandibular first molar.
Preserve the fifth cusp.
Leave MIP contacts on stamp cusps, not on inclines.

Mandibular left first molar

#19

Finish line

Auto-trace is a guess. Drag a point onto the finish line you actually marked. Click the tooth to add one.

0 control points

Path of insertion

0% of the wall above the margin is undercut

Teal faces the path. Gold fades. Red will not seat.

Pass criteria

Mark a closed margin.
Insertion is honest.
Keep the distal (fifth) cusp on this first molar.

Read this

The assignment

Mandibular left first molar (FDI 36, Universal 19). Five cusps. Two roots. This is the tooth you will crown for the rest of your career. Do not treat it like a second molar.

Pass criteria

Closed margin on the finish line. Insertion with no red undercut on the axial wall you intend to use for retention. Distal cusp present. Thickness legal. Occlusal contacts as points, not smears.

Open the practice lab