osteology

Question 1

where do the two maxilla bones fuse

Answer 1

intermaxillary suture

Question 2

what parts does the maxilla consist of?

Answer 2

body, frontal, zygomatic, alveolar, palatal processes

Question 3

What does the body of the mandible contain

Answer 3

air filled sinuses

Question 4

what is each tooth covered with?

Answer 4

A bony eminence that corresponds to its roots- canine eminence is prominent

Question 5

Where is the infraorbital foramen?

Answer 5

Distal to the canine eminence and superior to canine fossa, approximately 2cm below mid infraorbital rim

Question 6

Describe bone of the cortical plate.

Answer 6

thin- paper thin in some areas, sometimes absent, cancellous, infiltration done through it.

Question 7

Where is the greater palatine foramen located (adults and children)

Answer 7

at apex of maxillary 3rd molar in adults, apex of maxillary 2nd molar in children. About 1cm from the gingival margin.

Question 8

What bony eminence may slow/inhibit spread of solution to the apical region of the 16 & 26?

Answer 8

The zygomatic buttress

Question 9

What are some anatomical considerations in maxillary anaesthesia?

Answer 9

• Position of root apices (central incisors/canine-buccally, lat incisors- palatally)
• crossover nerve supply
• length of roots

Question 10

Describe the cortical plates of the mandible.

Answer 10

• Buccal cortical plate v dense in adults
• Labial cortical plate near incisors less dense+more porous and therefore allows infiltration

Question 11

Describe the ramus of the mandible.

Answer 11

-lateral surface: thick
- medial surface: contain mandibular foramen

Question 12

Describe the body of the mandible

Answer 12

buccal side: thick cortical bone- anteriorly less thick, mental foramen
lingual side: thick bone, some cases lingual foramina located near posterior molar region and incisor region

Question 13

how does the position of the mental foramen change with age?

Answer 13

child- far down 1/3
adult- middle 1/2
elder far up