Acquired Dental Anomalies

what are acquired dental anomalies?

Gradual loss of dental hardtissue as a result of chewing is termed...

attrition

what factors accelerate loss of tooth structure?

bruxism/ grinding

what is the effect of attrition on the pulp?

deposition of secondary dentin reduces pulp space

Gradual loss of dental hard tissue as a result of external mechanical action

abrasion

what are reasons to get abrasion?

parafunctional habits, poorly fitting dentures, retainers or brushing and flossing injuries

Gradual loss of dental hard tissue as a result ofchemical injuries (not involving bacteria)

erosion

what causes erosion?

what wear is indicated from the x-ray?

erosion

radiolucent defects on the crowns indicate....

erosion

Loss of tooth structure from occlusal stresses that create repeated tooth flexure

abfraction

where is tooth structure lost during abfraction?

cervical area

abrasion vs abfraction?

abrasion- smooth tooth structure loss at cervical region (usually), from external mechanical action

abfraction- "V" cut divit in tooth from occlusal stresses

T/F: abrasion and abfraction are usually seen together in the mouth

T

what cells remove tooth structure?

odontoclasts

Progressive __ of deciduous tooth the result in shedding and subsequent eruption of permanent tooth

resorption

what is a main reason for external resorption?

excessive mechanical and occlusal forces

-ortho tx > apical external resorption

how is the PDL space in external resorption?

normal in width

-enlarged would mean problem with endo

what are the causes of external resorption?

1. excessive forces (ortho tx)

2. loc inflammatory lesions

3. re-implanted teeth

4. impacted teeth, tumors, and cysts

5. unknown

What is shown in the radiograph?

external resorption; here it is a diffuse and well-defined problem

what is happening in the radiograph?

replacement of tooth by bone

localized, subepithelial, supra-osseous resorptive process of the tooth

Invasive Cervical Resorption

-starts at cervical level

what is shown in the radiograph?

invasive cervical resorption

what tooth does invasive cervical resorption occur most likely on?

max central incisors

what is happening in the pic?

Invasive Cervical Resorption

-enamel is translucent

resorption that occurs inside the pulp?

Internal Resorption

Odontoclasts resorb the dentin wall of pulp chamber or root canal

internal resorption

what causes internal resorption?

etiology is unknown but likely inflammation/ trauma

what is shown in the radiographs?

internal resorption- odontoclast resorbing the pulp chamber of root canal

internal or external resorption? (See pic)

external resorption

internal or external resorption? (See pic)

internal resorption

which dentin is deposited due to aging?

secondary dentin

which dentin is deposited due to stimuli?

tertiary dentin

Changes in pulpal tissue resulting in mineralization

Pulpal Calcifications

Common idiopathic calcificationsFreely in tissue or attached to wallUsually round radiopacitiesNo treatment require

Pulp Stones

tx required for pulp stones?

no

idiopathic calcified pulp chamber/ canals, ass. w/ older age is called...

pulp sclerosis

is tx required for pulp sclerosis?

no

Excessive deposition of cementum on the tooth roots

Hypercementosis

Hypercementosis is associated with what dental finding?

supraerupted teeth, periapical inflammation and Paget Disease of bone and hyperpituitarism

what is shown in the radiographs?

Hypercementosis

how is the PDL during hypercementosis?

PDL space is intact and around new cementum layer