Interocclusal contacts in MIP and excursive movements

Question 1

MIP:

Answer 1

maximum intercuspal position

Question 2

CO:

Answer 2

“older term”

Question 3

CR:

Answer 3

you should know this very well

Question 4

Interocclusal Contacts

Two Philosophies

Answer 4

• Cusp-Fossa contacts

* Cusp-Marginal Ridge contacts

Question 5

Each functional cusp occludes in a fossa

of the opposing tooth (2)

Answer 5

• Tooth to tooth arrangement
• Used when restoring both
opposing quadrants of teeth

Question 6

cusp-marginal ridge (3)

Answer 6

•A one tooth to two teeth arrangement (most of the times)
•The majority of natural dentitions have this type of
occlusion
•Commonly used for single restorations

Question 7

The cusp-marginal ridge occlusal relationship

allows for

Answer 7

some cusps to occlude onto
marginal ridges and some others to occlude
into fossae.

Question 8

The cusp-fossa relationship allows only for

Answer 8

each cusp to occlude into one fossa.

Question 9

Mandibular central incisor contacts the

Answer 9

maxillary central
incisor
(opposes only one tooth –the only other tooth to do this
is the max 3rd molar)

Question 10

• Mandibular lateral incisor contacts the

Answer 10

opposing maxillary

central and lateral incisors

Question 11

• Mandibular canine contacts

Answer 11

opposing maxillary lateral

incisor and maxillary canine

Question 12

Mandibular first premolar contacts the (2)

Answer 12

▪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)

Question 13

Mandibular second premolar contacts the (2)

Answer 13

▪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)

Question 14

Mandibular first molar, the MB cusp contacts

the (2)

Answer 14

▪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)

Question 15

Mandibular first molar, the DB cuspcontacts the (2)

Answer 15

▪central fossa of the maxillary first molar
(cusp-marginal ridge)
or
▪central fossa of the maxillary first molar
(cusp-fossa)

Question 16

Mandibular first molar, the D cusp (3)

Answer 16

•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)

Question 17

Mandibular second molar, the MB cusp contacts the (2)

Answer 17

•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)

Question 18

Mandibular second molar, the DB

cusp contacts the (2)

Answer 18

•central fossa of the maxillary second 
molar (cusp-marginal ridge)
or
•central fossa of the maxillary second 
molar (cusp-fossa)

Question 19

Maxillary central incisor contacts the

Answer 19

mandibular central and lateral incisors

Question 20

Maxillary lateral incisor contacts the

Answer 20

opposing mandibular lateral incisor and mandibular

canine

Question 21

Maxillary canine contacts the

Answer 21

opposing
mandibular canine and overhangs-contacts the
mandibular premolar

Question 22

Maxillary first premolar contacts the (3)

Answer 22

•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)

Question 23

Maxillary second premolar contacts the (3)

Answer 23

•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)

Question 24

Maxillary first molar, the ML cusp contacts the (2)

Answer 24

•central fossa of the mandibular first molar (cusp-
marginal ridge)
or
•central fossa of the mandibular first molar (cusp-
fossa)

Question 25

Maxillary first molar, the DL cusp contacts the (2)

Answer 25

•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)

Question 26

Maxillary second molar, the ML cusp contacts

the (2)

Answer 26

•central fossa of the mandibular second molar
(cusp-marginal ridge)
or
•central fossa of the mandibular second molar
(cusp-fossa)

Question 27

Maxillary second molar, the DL cusp contacts

the (2)

Answer 27

•distal marginal ridge of the mandibular
second (cusp-marginal ridge)
or
•distal fossa of the mandibular second molar
(cusp-fossa)

Question 28

The pathways each functional cusp will follow during

excursive movements: (3)

Answer 28

• Right Lateral Movement
• Left Lateral Movement
• Protrusive Movement

Question 29

The pathways each functional cusp will follow during 
excursive movements:
•Right Lateral Movement
•Left Lateral Movement
•Protrusive Movement

Usually referred to as: (3)

Answer 29

• Working (also known as laterotrusive pathways)
• Non-Working (also known as mediotrusive pathways)
• Protrusive pathways