CHAPTER V: HARD TOOTH TISSUE REDUCTION Flashcards
- gradual wearing of tooth tissue due to physiologic use due to mastication
- As we age, there is wear and tear on the incisal area,
- proximal area, or cervical area.
ATTRITION
CLASSIFICATION OF ATTRITION
- Anterior teeth
- The portion of the teeth that we use for cutting of the food.
Incisal Attrition
- Posterior teeth
- Developmental groove, cusp tips or central groove
Occlusal Attrition
Caused by the drifting of the tooth and mastication
Proximal Attrition
CLINICAL MANIFESTATION of Attrition
- Slight flattening of incisal edge
- Reduction of cusp or appearance of a small polished facet on a cusp tip or ridge
- Polished facet
- On the cusp tip of the mandibular 2nd premolar, there is concavity known as the polished facet.
ETIOLOGY of attrition
- Loss of posterior teeth resulting to shortening of bite and incisal attrition
- Chewing of fibrous food
- Bruxism or nightgrinding
- Hypoplasia
Incomplete or defective formation of the organic enamel matrix of the tooth. The tooth does not exhibit the complete organic matrix, so it is easily attrided.
Enamel hypoplasia
Pathological wearing of tooth structures through mechanical process
ABRASION
TYPES of abrasion
- Toothbrush Abrasion
- Occupational Abrasion
- Habitual Abrasion
- Ritual Abrasion
Clinical Manifestation of Toothbrush Abrasion
a. V-shaped / wedged-shaped cervical 3rd
b. Sharp angled lesion and enamel edge
c. Hard and highly polished dentin
Has something to do with the occupation of the patient.
Occupational Abrasion
- Pipe-smoking
- Improper use of toothpick (proximal)
Habitual Abrasion
- Rare: rituals like fire-eating
- In some countries
- Causing facial abrasion.
- Facets
- Facial abrasion
Ritual Abrasion
- Loss of tooth substances/ wearing away of tooth structure by chemical process
- No bacterial invasion
EROSION
Clinical Manifestation of Erosion
Scooped out depression
