4/3: Interocclusal Contacts and Cuspal Pathways Flashcards
What are synonymous terms for functional cusps?
Supporting, centric, working, stamp cusps
What are synonymous terms for non functional cusps?
Guiding, non centric, non working, shearing cusps
What is the cusp-marginal ridge occlusion?
Each Functional cusp contacts the marginal ridges of opposing pair of teeth or fossae of opposing teeth
What is the arrangement of the cusp-marginal ridge?
One tooth to two teeth arrangement
What kind of occlusion do majority of natural dentitions have?
Cusp-marginal ridge occlusion
What is cusp-marginal ridge occlusion commonly used for?
Single restorations
What is the cusp-fossa occlusion?
Each functional cusp occludes in a fossa
of the opposing tooth
What is the arrangement of cusp-fossa occlusion?
Tooth to tooth arrangement
When is cusp-fossa occlusion used?
When restoring both opposing quadrants of teeth
What does the cusp marginal ridge occlusal relationship allow for?
some cusps to occlude onto
marginal ridges and some others to occlude into occlusal fossae
What does the cusp-fossa relationship allow for?
only for each cusp to occlude into one fossa
Cusp marginal ridge occlusion is “_______ to _____”
Tooth to two teeth
Cusp fossa occlusion is “_______ to _____”
Tooth to tooth
What are the anterior interocclusal contacts for the mandibular central incisor?
contacts the maxillary central incisor
Which teeth oppose only one tooth?
Mandibular central incisor
Max 3rd molar
Where does the mandibular lateral incisor contact?
The opposing maxillary central and lateral incisors
Where does the mandibular canine contact?
Opposing maxillary lateral incisor and maxillary canine
Where does the mandibular first premolar contact?
mesial marginal ridge of the maxillary first premolar and the distal marginal ridge of the maxillary canine (cusp marginal ridge)
OR
mesial fossa of the maxillary first premolar (cusp-fossa)
Where does the mandibular second premolar contact?
mesial marginal ridge of the maxillary second premolar and the distal marginal ridge of the maxillary first premolar (cusp-marginal ridge)
OR
mesial fossa of the maxillary second premolar (cusp-fossa)
In the mandibular first molar, what does the MB cusp contact?
the mesial marginal ridge of the maxillary first molar and the distal marginal ridge of the maxillary second premolar (cusp-marginal
ridge)
OR
mesial triangular fossa of the maxillary first molar (cusp-fossa)
On the mandibular first molar, what does the MB cusp contact?
Central fossa of the maxillary first molar
(cusp-marginal ridge)
OR
central fossa of the maxillary first molar (cusp-fossa)
On the mandibular first molar, what does the D cusp contact?
Usually non-functional/not in occlusion
OR
Contacts the distal fossa of the maxillary first molar (cusp-marginal ridge)
OR
Contacts the distal fossa of the maxillary first molar (cusp-fossa)
On the mandibular second molar, what does the MB cusp contact?
mesial marginal ridge of the maxillary second molar and the distal marginal ridge of the maxillary first molar (cusp-marginal ridge)
OR
mesial triangular fossa of the maxillary second molar (cusp-fossa)
On the mandibular second molar, what does the DB cusp contact?
Central fossa of the maxillary second molar (cusp-marginal ridge)
OR
Central fossa of the maxillary second molar (cusp-fossa)
Where do the maxillary central incisors contact?
mandibular central and lateral incisors
Where do the maxillary lateral incisors contact?
opposing mandibular lateral incisor and mandibular
canine
Where do the maxillary canines contact?
opposing mandibular canine and overhangs-contacts the
mandibular premolar
What does the maxillary first premolar contact?
distal fossa of the mandibular first premolar OR
distal marginal ridge of the mandibular first premolar molar and mesial marginal ridge of the mandibular second premolar (cusp-marginal ridge)
OR
distal fossa of the mandibular first premolar (cusp- fossa)
Where does the maxillary second premolar contact?
distal fossa of the mandibular second premolar
OR
distal marginal ridge of the mandibular second
premolar molar and the mesial marginal ridge of the
mandibular first molar
(cusp-marginal ridge)
OR
distal fossa of the mandibular second premolar (cusp-fossa)
Where does the maxillary first molar, ML cusp contact?
Central fossa of the mandibular first molar (cusp-marginal ridge)
OR
Central fossa of the mandibular first molar (cusp-fossa)
Where does the maxillary first molar, DL cusp contact?
Distal marginal ridge of the mandibular first molar and the mesial marginal ridge of the mandibular second molar (cusp-marginal ridge)
OR
Distal fossa of the mandibular first molar (cusp-fossa)
Where does the maxillary second molar, ML cusp contact?
Central fossa of the mandibular second molar
(cusp-marginal ridge)
OR
Central fossa of the mandibular second molar
(cusp-fossa)
Where does the maxillary second molar, DL cusp contact?
Distal marginal ridge of the mandibular second (cusp-marginal ridge)
OR
Distal fossa of the mandibular second molar
(cusp-fossa)
What are cuspal pathways?
The pathways each functional cusp will follow during excursive movements
The pathways each functional cusp will follow during excursive movements:
- Right Lateral Movement
- Left Lateral Movement
- Protrusive Movement
What are cuspal pathways referred to as?
- Working (also known as laterotrusive pathways)
- Non-Working (also known as mediotrusive pathways)
- Protrusive pathways
Describe the pathways on tooth #30 as they contact tooth #3
Describe the pathways on tooth #3 as they contact tooth #30
