Chapter 8 Dental Science 1

Supernumerary (Hyperdontia)

Full set of teeth, plus at least 1 extra tooth
Hereditary

Anodontia

Genetically missing 1 or more teeth
Hereditary

Macrodontia/Microdontia

Abnormally large or small teeth
Hereditary

Dens in dente

Enamel forms into the papilla
 Hereditary
 Usually affects maxillary laterals

Germination

 When one tooth germ divides and two crowns form 1 tooth
 Have 2 crowns and only 1 root
 Hereditary

Fusion

 Two separate two germ combine to form 1 tooth
 Extreme pressure in area of forming tooth

Enamel Pearl

Enamel grows on the root surface – typically round shaped
 Ameloblasts in the wrong area

Enamel Dysplasia

Hypoplasia - enamel of teeth does not form completely or at all
 Hereditary or Systemic Disease

Dentinal Dysplasia

The dentin of the tooth doesn’t form completely or at all
 Hereditary or systemic

Concrescence

The roots of 2 or more teeth connect together
 Trauma to tooth or teeth being over crowded

osteoclasts

eat bone

take away

asteoblast

build bone

Blasts build

bud stage/ initiation,

formation of the tooth begins

cap stage/ proliferation

the cells of the developing tooth increase

bell stage/ histodifferentiation/ morph differentiation,

the different tissues of the tooth form and its shape are established

fissure

fault along a developmental groove on the occlusal surface caused by incomplete

pit

two developmental grooves cross each other

Apex

tapered end of each root tip

apical

anything that is situated at the apex

periapical

Anything surrounding the apex

primary function of cementum

anchor the tooth to the bony socket with attachment fibers within the periodontium

what makes up the periodontium

cementum, alveolar
bone, and the
periodontal
ligaments

periodontium

supports the teeth within the alveolar bone

These tissues protect and nourish the teeth

Alveolar Process

supports the teeth in their
functional positions in the jaw