This document discusses different types of compensating curves used in dental prosthetics to establish balanced articulation during jaw movements. It describes the anteroposterior and mediolateral compensating curves that begin with the first replacement tooth and continue through the second molar. It also outlines the curve of spee from the mandibular canine through the condyle, the curve of Wilson to arrange the lower molars, and the curve of Monson connecting the curve of spee and Wilson to all cusps on a 4 inch radius.

1. Compensating Curves

2. Introduction
The arrangement of nonanatomical posterior teeth
with both anteroposterior and mediolateral com-
pensating curves permits the establishment of a
balanced articulation.

3. The primary function of compensating curve is to provide
balancing contacts for protrusive mandibular movements.

4. Anteroposterior Compensating Curve
● Begins at the distal marginal ridge of the first posterior
replacement tooth
● continues through the second molar
● involves the cuspid tips and the retromolar pads as the
anatomical guides.
● extent of the curve rarely exceeds 20 degrees.

5. Mediolateral Compensating Curve
● To achieve balanced articulation during
lateral movements
● Also is initiated with the first replacement
tooth continues through the second
molar.
● The facial cusps elevated in relation to the
lingual cusps to establish this curve
varies with the condylar and incisal
guidances.

6. Curve of spee
● Beginning with the cusp tip of the mandibular canine
● following the buccal cusp tips of the premolar and molar
teeth,
● continuing through the anterior border of mandibular ramus,
● ending with the anterior most portion of the mandibular
condyle.

7. Curve of Wilson
● It is used to arrange the molars
● The lower teethare inclind lingually,giving
prominence to the buccal cusps and
brining them into heavy occlusal contact
with the upper buccal cusp during lateral
movements on working side

8. Curve of Monson
● Manson (1920), at a later date,
connected the curve of spee and
curve of wilson to all cusps and
incisal edges, and suggested that
the mandibular arch adopted itself
to the curved segment of a sphere
of a 4 inch radius

9. Thank you