Non Caries Lesiona

Question 1

What’s abrasion ?

Answer 1

Pathologic loss of tooth structure due to repetitive contact with of an external instrument like a toothbrush, pencil, or fingernail , hard fibrous food , dental floss.
High force during horizontal brushing.

Question 2

What’s a a abfraction ?

Answer 2

Micro fracture of cervical enamel rods due to repeated compression and flexors of tooth under occlusal loading.

Question 3

What’s attrition ?

Answer 3

Aggressive Contact with opposing teeth due to bruxism or grinding during day (pathological).
Or during mastication when teeth grinding together ( physiological ).

Question 4

What’s erosion ?

Answer 4

Loss of hard tissue structure due to chemicals like acids that can be intrinsic or extrinsic.
Acid from stomach , chronic vomiting , GIT reflex disorders , fruits juices , lemon …

Question 5

What’s the signs of attrition ?

Answer 5

1. Loss of occlusal surfaces , loss of opposing tooth contact between cusps or incisal edges ( loss of tooth anatomy ).
2. Enamel of molars thin and flat.
3. Sensitivity or pain due to exposed dentin.
4. Tooth discoloration ( yellow ).
5. Copmress periodontal support.
6. Mechanical failure of restoration.

Question 6

What’s abrasion signs ?

Answer 6

Defect can be V shaped , bowl , flat.
Scooped dentin may not sensitive.

Question 7

What’s a fraction sings ?

Answer 7

1. Hair like cracks ( due heavy occlusal forces ).
2. Striations ( horizontal bands of enamel breakdown ).
3. Crescent shape lesion within enamel .
4. Cusps invagination ( depression ).
5. V shaped in cervical line in enamel and dentin .

Question 8

How to diagnosis the conditions ?

Answer 8

Temporomandibular joint function and associated musculature
Orthodontic examination
Intra oral soft tissue analysis
Hard tissue analysis
Location and severity of tooth wear
Social history, particularly diet

Question 9

How to treat ?

Answer 9

1. Find the causative factors and deal with it
2. Night guard in necassery cases.
3. Diet correction
4. Treat and manage the fractured edges and cusp and polishing them .
5. Desensitizing agents such topical varnish , toothpaste .
   Restoration option occurring to the condition , composite , veeners , crowns , ortho , dentures.

Question 10

What’s the scores from 0-3.

Answer 10

0 - no erosive wear
1- initial loss of surface texture
2- dosticint defect hard tissue loss <50%
3- hard tissue loss >50%