1. P.K.Thomas
Waxing Technique
a ‘drop wax’ or ‘wax added’ technique
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Construct Crown & Bridge Structures 510B Ver2
2. Why put all those grooves on the occlusal
surface??
Why not put simple inclined planes on a flat
table??
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3. Introduction
There are many positive and negatives features on a
tooth eg, cusp tips and ridges.
The ridges, when properly formed, are convex in all
directions. Buccolingually and mesiodistally. This is to
provide point contacts with the opposing cusps.
The convex surfaces of ridges produce a distributed
contact pattern with small contacts. In this way
occlusal forces are distributed over a wide area of the
occlusal surface.
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4. The grooves perform an important function.
If they are adequate in width and depth and
traverse the occlusal surface in the proper
direction, they will permit the smooth
unimpeded passage of the opposing cusps in
excursive movements.
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17. The functional cusps (lingual of the
maxillary and buccal of the mandibular) are
the cusps to locate first. They should be
positioned so they will contact the
appropriate fossa or marginal ridge of the
opposing tooth.
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18. The maxillary buccal nonfunctional cusps
need to be short enough to miss contacting the
mandibular buccal ‘functional’ cusps during
excursions.
The mandibular lingual nonfunctional cusps
need to be slightly shorter than the buccal and
placed as far to the lingual.
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