The earliest visible change of enamel caries appears as a white opaque spot that forms just adjacent to a contact point.Dentine caries appears brown with formation of cavity.

 
  • 釉质初期龋呈粉白色或棕黄色斑,表面无缺陷,牙本质龋呈深棕色或灰黑色,有深浅不等的龋洞形成。
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