D1 & D2 · Digital dentistry
Dental Merlin is the CAD academy from 3PX — first- and second-year dental students, a full Universal 1–32 library, pin-drop landmarks, margin design, seating protocols, and occlusion. In the browser. Ready for seminar.
Identity of the dentition
FDI, Universal, and Palmer — speak all three without translating on your fingers.
Convert any tooth among FDI, Universal, and Palmer.
Mesial, distal, buccal, lingual, occlusal — then the lines where they meet.
Name every surface on an anterior and a posterior tooth.
Incisors and canines: cingulum, mamelons, ridges, and why the canine is the cornerstone.
Identify cingulum, lingual fossa, and marginal ridges on a maxillary central.
Cusps, fossae, grooves, the oblique ridge, and the fifth cusp of the mandibular first molar.
Name the cusps of a maxillary first molar including Carabelli.
Enamel, dentin, pulp, cementum — what you are looking at when a scan turns yellow.
Order enamel, dentin, cementum, and pulp by hardness and by location.
Vertices, triangles, normals, STL — the grammar of every CAD tool you will touch.
Explain what an STL actually stores.
Prep, CAD, seat, occlusion
Zirconia lute, MDP resin, and why saliva on an intaglio is a recement.
Choose RMGI vs MDP-resin vs adhesive bond from the ceramic.
HF, silane, etch, tack, glycerin — the lithium disilicate sequence in order.
Order the lithium disilicate bonding steps without skipping isolation.
Reduction, taper, rounded internals, ferrule — the prep is the design.
State a reasonable occlusal reduction for a posterior zirconia crown.
Chamfer, shoulder, knife-edge. Then tracing the margin without lying to the mill.
Match a finish line to a material.
Scan, mark, insert, design, contacts, mill — in that order, every time.
List the steps of a single-unit crown design in order.
MIP, laterotrusion, stamp cusps, and a contact that is red for a reason.
Define MIP and why it is not automatically centric relation.
Holes, blood, alignment drift, and the retraction the scanner cannot invent.
Name five scan defects that should stop a design.
Zirconia, lithium disilicate, PFM, metal — thickness rules change the sculpt.
Give a minimum thickness for monolithic zirconia vs. lithium disilicate.
Mark a margin, set insertion, seat anatomy, and read the contact map on a mandibular first molar.
Complete a single-unit workflow on a mandibular first molar.