occlusion Flashcards
orients the maxilla to the rotational axis in 3 planes
facebow
its a jaw position and independent of teeth position
CR
master casts are articulated after
using CR records
the average plane established by the incisal and occlusal surfaces of the teeth
plane of occlusion
the static and dynamic contact relationship between occlusal surfaces of teeth during function
articulation
the static relationship between the incising and masticating surfaces of the max and mand teeth or tooth analogues
occlusion
type of occlusions
monoplane/neutrocentric
lingualized
balanced
occlusal arrangement where posterior teeth have masticatory surface that lack any cuspal height
monoplane occlusion
posterior teeth have no cusps and teeth are arranged on flat surface
monoplane occlusion
no vertical overlap of anterior teeth
monoplane occlusion
occlusion when patients will have to conform to a vertical pattern of mastication
monoplane occlusion
severely resorbed ridges
monoplane occlusion
skeletal class II, III jaw relations and crossbites
monoplane occlusion indications
-posterior teeth on the working side are contacting
-posterior teeth on the non-working (balance side) are not contacting
monoplane occlusion (NON-balanced)
cuspless mandibular posterior teeth arranged on a flat plane
-only max lingual cusps are in occlusion with central fossae areas of mand post teeth
lingualized, non-balanced occlusion
-all the advantages of the monoplane occlusion and improved esthetics
least esthetic scheme and limiting on the arrangement of anterior teeth
-difficult in food penetration
monoplane occlusion disadvantages
bilateral simultaneous occlusal contacts of the anterior and posterior teeth in excursive movements
balanced occlusion (both cusps touching)
the ant-post and mesial-lingual curvature of occluding surfaces and incisial edges of artificial teeth used to devleop balanced occlusion
compensating curve
decreasing the anterior guidance angle:
will facilitate establishing balanced occlusion
hanau’s quint
C=(condylar inclination) x (incisial guidance) / (occlusal plane) x (cuspal inclination) x (compcurve)
5 factors that affect balanced occlusion
- condylar inclination
- incisal guidance
- occlusal plane inclination
- compensating curve
- cuspal inclination
occlusal contacts are made on anterior teeth only in_______ in the attempt to minimize stress/force applied to anterior ridge
excursive movements
the bilateral, simultaneous, anterior and posterior occlusal contact of teeth in centric relation and eccentric relation
balanced occlusion
setting flat/hitting on one side and not the other
non-balanced
hanau’s quint:
incisal guidance=
condylar guidance=
cusp height=
plane of occlusion
compensating curve
incisal guidance= anterior influence
condylar guidance= posterior influence/determined by patient anatomy
cusp height=0, 20, 30
plane of occlusion=
compensating curve=excursive movement
condylar guidance is determined by
the patients anatomy
monoplane occlusion indications:
-excessive inter-ridge
-skeletal class II, III and crossbite
-successful previous F/F were monoplane
-limited oral dexterity
-severely resorbed ridges
ideal ridge forms
square to gently round
unfavorable ridge forms
thin, tall, undercut
tuberosities
ideal=
minimum=
ideal=5-6
minimum= 4
soft palate.
class I
class II
classIII
I= ideal >5mm
II= okay 3-5 mm
III= poor <3 mm (hardest to work with
border attachments
ideal=
unfavorable=
ideal= muscle/frenum attachments are 10 mm or more from crest of ridge
unfavorable= attachments near crest of ridge may interfer with peripheral seal
the tongue and complete dentures major impact areas:
border seal
tooth placement
speech
border seal is absent, stabilizing influence of tongue is absent, rentention/function of mand CD difficult
with what
retruded tongue
chewing efficiency is ____% of natural teeth
20-25%
PDI classification system
Class I, II, II, IV
PDI
straight forward
class I
PDI
denture supporting anatomy degraded
Class II
PDI
anatomy degraded; surgical revision needed; additional factors present
class III
PDI
most debilitated edentulous condition
class IV
