Tooth cervical substance loose

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Tooth cervical substance loose
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1)Abration
2)Erosion
3)Abflaction
4)Attrition
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Abrasion from aggressive tooth brushing.
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Abrasion from aggressive tooth brushing
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attrition
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Facets
Horizontal
oblique
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Cervical erosion creating flat,wide,round
cervical defect
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Traumatic toothbrushing by a right-hand person
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abfraction
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Sever loss of cervical tooth structure pulp
exposure
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Class V restoration
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Root coverage