MODULE 2: HARD TOOTH TISSUE REDUCTION

attrition

physiologic wearing away of tooth

attrition

flattened occlusal plane and incisal edges

attrition

• small polished facet on cusp/tip slight

flattening of the incisal edge

• gradual reduction in cusp height

none

treatment of attrition

none

clinical significance of attrition

abrasion

pathologic wearing away of tooth through abnormal mechanical processes.

abrasion

due to hard toothbrushes: at cervical

areas (rough, uneven surfaces)

due to toothpick

restoration

treatment for abrasion

hypersensitivity

clinical significance of abrasion

hypersensitivity

clinical significance of abfraction

abfraction

• on buccal area of posterior tooth and cervical area of tooth;

• V-shaped notches that is caused by occlusal discrepancies or malocclusion.

abfraction

● constant occlusal discrepancies:

fracture of tooth structure

● Dentin is the area of stress

restoration, orthodontic

treatment for abfraction

bruxism

form of tooth grinding that can cause abrasion to chewing surfaces of teeth

also form of abrasion

bruxism

happens prematurely in age, can lose teeth at middle age

bruxism

● Leads to hypersensitivity - dentinal tubules exposed, extension of odontoblast exposed 

● Can lead to chronic clenching

● Causes:  headaches

stress, psychological problems

etiology of bruxism

crowns

treatment for bruxism

hypersensitivity

clinical significance of bruxism

erosion

loss of tooth substances

erosion on labial or buccal area;

shallow, broad smooth highly polished, discoloration; may or may not have discoloration on the tooth (??);

loss of tooth process without bacterial action; usually shallow

erosion

common on lingual area or palatal surfaces

restoration

treatment of erosion

acid

etiology of erosion

change the habit

clinical significance of erosion