Unit 304 Flashcards
Incisor
Shape of a sharp/blade
U1 L1 devloped - Age 7-8
U2 L2 developed - Age 7-10
Loss of incisor can affect speech
1 root
Biting
Canine
Strong pointed shape - U3 L3
Tears food
Develops around 9-14 years old
Guides jaw into correct alignment
1 root
1st pre molar
Shares features of both canines and molars
develop age 9-13 years old
U4 - 2 ROOTS
L4 - 1 ROOT
Chewing
Upper and lower cusps - 2
2nd pre molar
shares features of both canines and molars
develop age 10-14 years old
1 root
U5 L5
Chewing
Upper and lower cusps - 2
1ST molar
Chewing
Develop age 5-8 years old
Upper cusps 4-5, lower cusps 5
U6 - 3 ROOTS
L6 - 2 ROOTS
2nd molar
develop 10-14 years old
Chewing
Upper and lower cusps = 4
U7 - 3 ROOTS
L7 - 2 ROOTS
3RD molar
develop age 17-24 years
roots and cusps are varied for each individual
Wisdom tooth - U8, L8
Enamel
Thin layer that protects the tooth, this is strengthened from how the hydroxyapatite is arranged.
Enamel can chip and crack, erode due to sugars/acids that cant be repaired.
Amelodentinal Junction
boundary between the enamel and the underlying dentin
primary dentin
forms before eruption
most prominent form of dentin
located between the enamel and pulp chamber
secondary dentin
forms after eruption
develops from odontoblasts living within the pulp .
Tertiary dentin
created because of tooth decay presence or wear.
Odontoblasts
located in the most outer layer of the dental pulp.
They form a natural barrier between mineralised tissues, dentin, soft tissues, dental pulp of tooth.
Recognise caries first.
Pulp
Made of unmineralised oral tissue composed of soft connective tissue, vascular, lymphatic, and nervous elements.
Based in the Centre of the tooth, beneath the last layer of dentin.
Pulp chamber
Located beneath the dentin layer .
Pulp connects nerves and blood vessels
Hollowed out space in the crown of your tooth
Pulp/root canal
contains all blood vessels, nerves and connective tissue.
Pulp extends to the crown of the tooth to the beginning of the roots, where it will connect all the tissues surrounding the root.
Apical foramen
a very small opening hole at the beginning of the root.
the blood vessels and nerves use the foramen to pass through the tooth.
Cementum
Thin layer of hard dental tissue that covers the anatomic roots of teeth e.g. the pulp root canal and apical foramen, and anchors the periodontal ligament to the tooth.
Formed by “cement oblasts”
periodontal ligament
connective tissue that connects both the tooth with the socket between the inner wall of the alveolar socket and the roots of the teeth.
Collagen bands
Gingival crevice
slight ridge in your mouth where your teeth meet your gums.
Furcation
Where the roots divide.
This is only presented on multi-rooted teeth
refers to bone loss
Hard palate
Front, boney area of the roof of the mouth
- 2 facial bones
- 4 cranial bones
maxilla and palatine
soft palate
back of the roof of the mouth and stops at the Uvula
made up of multiple muscles and tissues - that play a role in breathing, swallowing and phonation.
Rugae
resembles the roof of the mouth - crease/wrinkles.
positioned behind the upper front teeth
Smokers - rugae can turn pale grey colour and patient may complain of burning/irritation on their palate
Tuberosity
Located at the lower part of the infratemporal surface of the maxilla - rounded eminence.
Tends to appear more prominent when the wisdom tooth comes through.
rough on lateral side to help with speech
Cleft palate
located in the roof of the mouth
can sometimes not develop correctly in the womb - tissue does not stick together
Tongue
Muscular organ, covered with pink tissue called mucosa
rough bumps are called papillae - thousands of taste buds
2 parts - oral at the first and pharyngeal at the back, it is separated due to the lingual septum.
Lamina Dura/ Compact bone
Compact bone lies close to the periodontal ligament
lamina dura surrounds the tooth socket appears as a hard thin layer of bone (white) - cribriform plate
Spongy/cancellous bone
light porous bone that encloses numerous large spaces that are presented in a honey comb/spongy appearance.
oral mucosa
mucosa membrane lining or skin that is inside of the mouth, cheeks and lips.