Occlusion in Dental Anatomy S t u d y Q u e s t i o n s w i t h S o l u t i o n s
1. what is occlusion?: 2 meanings:
-touching of the teeth
-occlusal philosophy
*treatment must satisfy both meanings
2. what is a successful treatment?: - when there is less stress on the teeth allowing the
system to work more eflciently
3. types of occlusion: - static occlusion
-dynamic occlusion
4. static occlusion: - contacts between teeth when mandible is closed
*also known as MI/MIP/MIC or CO
5. dynamic occlusion: - contacts between teeth when mandible is moving relative to the
maxilla
6. types of mandibular movements: - rotation
-translation
-canine guidance/group function
7. what's the only tooth in the mouth that touches one other tooth?
(common board question): mandibular central incisor
(only touches the maxillary central incisor)
8. ideal occlusion: MI = CR
-every maxillary tooth has contacts with two mandibular teeth (class I molar relationship)
9. functional cusps (molar occlusion): - mandibular buccal cusp
-maxillary lingual cusp
*do the chewing
10. non-functional cusps (molar occlusion): - mandibular lingual cusp
-maxillary buccal cusp
1
, *will cause a crossbite
11. what are points of contact?: - ideal scheme for all contacts of supporting/functional
cusps with fossae and marginal ridges of opposing teeth
-this is rare in nature
12. cusp-to-fossa occlusion (static occlusion): - mandibular buccal cusps are
contacting fossae of maxillary teeth
AND
-maxillary lingual cusps are contacting fossae of mandibular teeth
13. in an ideal intercuspal position, the distolingual cusp of a
maxillary first molar opposes the...?: - mesial marginal ridge of the mandibular
second molar
14. mutual protection: - during clenching, posterior teeth protect the anterior teeth
from excessive forces (static)
AND
-anterior teeth protect the posterior teeth when the mandible is in motion (dynamic)
--> when you slide side-to-side, you want posterior teeth to separate (if touches = interference)
15. which has more bone surrounding them, posterior or anterior
teeth?: - posterior teeth
16. dynamic occlusion goals: when using grinding/tapping paper:
-want V-shaped lines on the lingual surface of max. incisors and canines
-want dots on premolars and molars
17. how do you get the V-shape on the lingual surface of incisors
and canines? (possible test question): - from protrusive movements (create line) and
lateral/side-to-side movements (finish the V)
18. which tooth takes most of the lateral forces?: - canines
19. what are 2 important factors in mastication?: - alignment
-occlusion
20. basic masticatory activities such as chewing, swallowing, and
speaking de- pend on...?: - position of the teeth in the dental arches
-the relationship of opposing teeth during occlusion
2
1. what is occlusion?: 2 meanings:
-touching of the teeth
-occlusal philosophy
*treatment must satisfy both meanings
2. what is a successful treatment?: - when there is less stress on the teeth allowing the
system to work more eflciently
3. types of occlusion: - static occlusion
-dynamic occlusion
4. static occlusion: - contacts between teeth when mandible is closed
*also known as MI/MIP/MIC or CO
5. dynamic occlusion: - contacts between teeth when mandible is moving relative to the
maxilla
6. types of mandibular movements: - rotation
-translation
-canine guidance/group function
7. what's the only tooth in the mouth that touches one other tooth?
(common board question): mandibular central incisor
(only touches the maxillary central incisor)
8. ideal occlusion: MI = CR
-every maxillary tooth has contacts with two mandibular teeth (class I molar relationship)
9. functional cusps (molar occlusion): - mandibular buccal cusp
-maxillary lingual cusp
*do the chewing
10. non-functional cusps (molar occlusion): - mandibular lingual cusp
-maxillary buccal cusp
1
, *will cause a crossbite
11. what are points of contact?: - ideal scheme for all contacts of supporting/functional
cusps with fossae and marginal ridges of opposing teeth
-this is rare in nature
12. cusp-to-fossa occlusion (static occlusion): - mandibular buccal cusps are
contacting fossae of maxillary teeth
AND
-maxillary lingual cusps are contacting fossae of mandibular teeth
13. in an ideal intercuspal position, the distolingual cusp of a
maxillary first molar opposes the...?: - mesial marginal ridge of the mandibular
second molar
14. mutual protection: - during clenching, posterior teeth protect the anterior teeth
from excessive forces (static)
AND
-anterior teeth protect the posterior teeth when the mandible is in motion (dynamic)
--> when you slide side-to-side, you want posterior teeth to separate (if touches = interference)
15. which has more bone surrounding them, posterior or anterior
teeth?: - posterior teeth
16. dynamic occlusion goals: when using grinding/tapping paper:
-want V-shaped lines on the lingual surface of max. incisors and canines
-want dots on premolars and molars
17. how do you get the V-shape on the lingual surface of incisors
and canines? (possible test question): - from protrusive movements (create line) and
lateral/side-to-side movements (finish the V)
18. which tooth takes most of the lateral forces?: - canines
19. what are 2 important factors in mastication?: - alignment
-occlusion
20. basic masticatory activities such as chewing, swallowing, and
speaking de- pend on...?: - position of the teeth in the dental arches
-the relationship of opposing teeth during occlusion
2
