Ch 1 intro to dental anatomy

what is dentitions

delvelopment, number, and arrangment of teeth

Has a primary phase and permanent phase

Deciduous teeth formation

Also known as primariy teeth (baby)

form prenatally at 14 weeks → appear in mouth at 6 months → last emerge at around 28m →completed postnatally at about 3 yr → primiry dentition stay until 6 yr old

Succedaneous teeth cycle

permanent dentition begins when 1st permeant molar( a nonsuccedus tooth) comes in → ends once all primary teeth shed

usally starts at 6y and ends at around 14-15 BUT wisdom teeth (3rd molars) not in until 18-25 y

lower jaw nomecleture

mandibular

upper jaw nomenclature

maxillary

Primary tooth formula

maxillary/mandibular

total of 10 teeth

What number system is this

Universal

• what we use

• ADA

What number system is this?

Palmer

• ADA symbolic system 1947

• symbolic system

What number system is this?

Federation Dentaire Internatinonale (FDI)

• 2 digit

• 1st : repersents quad

  • 1-4 adult

  • 5-8 baby

• 2nd: tooth in a quad

Crown and Root covered with

• Crown: enamel

• Root: cementum

• when they meet its called the cementoenamel junction (CEJ)

Dentin and Pulp

• Dentin makes up bulk of tooth

• pulp houses blood nerves and lyph

• Pulp cavity (both spaces tgr)

  • Pulp chamber

  • Pulp canal

The 4 tissues of tooth

enamal, cementum, dentin, pulp

pulp is the only soft tissue, the others are hard

What supports the tooth

Alveolar process

• its like the jaw bone ridge

What is the name of the tooth socket bone

Alveolus/ Alveoli

Incisors/Canines surfaces and ridges

4 surfaces and a ridge (Labial, Lingual,

Mesial, Distal, Incisal)

Premolars/Molars surfaces and ridges

4 surfaces and 1 ridge (Buccal, Lingual, Mesial, Distal, Occlusal)

Cusp

elevation or mound on crown portion of tooth

Tubercle

smaller elevation on some portion of crown produced by extra formation of enamel

Cingulum

lingual lobe of anterior tooth

Ridge

linear elevation on tooth surface named according to location

Marginal ridge

rounded borders on mesial/distal margins occlusal surfaces of premolars and molars as well as mesial/distal margins of lingual surfaces of incisors and canines

Triangular ridge

descend from cusp tips of molars/premolars toward central part of occlusal surfaces

cusp of carabelli

An addition cusp on molars, extra bump on one or two of your teeth

Transverse ridge

the joining of a buccal and a lingual triangular ridge

Oblique ridge

ridge crossing obliquely the occlusal

surfaces of maxillary molars (from DB cusp to ML cusp)

Lingual fossa

lingual surfaces of incisors

Central fossa

occlusal surfaces of molars

Triangular fossa

found on molars/premolars occlusal surface, sometimes found lingual surfaces of max incisors

Sulcus

long depression surface of a tooth between ridges and cusps

Mamelon

One of three protrusions normally found on the incisal edge of permanent incisors incisal ridges of newly erupted incisors

Developmental groove

shallow groove or line between primary parts of a crown or root

• It marks where the primary growth parts (lobes) of the tooth joined together during development

Supplemental groove

less distinct shallow linear depression on surface of a tooth

Pits-

small pinpoint depressions located at junction of developmental grooves or terminals of those grooves

Lobe

one of primary sections of formation in the development of the crown

Occlusal Table

Portion of a crown on a posterior tooth that is bounded by the cusp tips, crest of the marginal ridges, and crests of the cusp ridges

Division into thirds

Crown and root divided into thirds

Line Angles

think 3D

• combos-

  • meso or distal

  • buccal or lingaul or occusal

Point angel

Formed at the junction of three surfaces. basically tips of tooth