teeth

Question 1

dentication

Answer 1

• housed in alveoli of maxilla and mandible
• upper and lower arches
• half arches on each side
• equal numbers of teeth on same side

Question 2

types of teeth

Answer 2

• central incisor - 1 per arch
• lateral incisor - 1 per arch
• cuspid or canine - 1 per arch
• premolars - 1st and 2nd bicuspis - 2 per
• molars - 1, 2, 3, - 2-3 per arch
• 32 teeth but 3 molar removed

Question 3

functions of teeth in mastication

Answer 3

• incisors - cutting
• canines - ripping
• premolars and molars - crush and grind
• effective slicers and mashers

Question 4

surfaces of teeth

Answer 4

• midline is space between central incisors
• motion along arch is medial if moving towards midline
• distal if moving away from midline

Question 5

five surfaces

Answer 5

• medial surface face midline
• distal surface face away
• buccal surface face cheeks
• lingual surface face tongue
• occlusal surface is between upper and lower teeth

Question 6

internal anatomy

Answer 6

• each tooth has root in gun
• crown is visible top third - enamel
• hard surface overlaying anatomy of teeth
• below crown is ivory overlying pulp
• pulp is nerve ending
• teeth are held in alveolar socket by thin layer of bone called cemetum

Question 7

dental development

Answer 7

• humans go through two sets of teeth
• infants - temporary
• deciduous/milk teeth
• buds present at birth
• errupt 6-9 months

Question 8

general sequence of development

Answer 8

• central incisors - 6-10 mos
• lower before upper
• lateral incisors - 8-10 mos
• upper before lower
• canines - 10-20 mos
• molars - 20-24 mos

Question 9

innervation of teeth

Answer 9

• rich sensory innvervation
• sense of pressure and load against teeth
• control chewing and other oral forces
• pain and thermal sensation
• CN V - trigeminal
• upper = maxillary
• lower = mandibular

Question 10

maxillary branch

Answer 10

• gets split into 2 branches
• anterior and posterior superior alveolar nerves
• anterior innervates incisors and canines
• posterior innervates molar and premolar

Question 11

mandibular branch

Answer 11

• splits into anterior and posterior

- posterior gives rise to inferior alveolar nerve that supplies all mandibular dentation