Enamel infraction

• It is the incomplete fracture or crack of enamel without loss of tooth substance.
• These fractures appear as crazing within the enamel substance which do not cross the dentino-enamel junction and appear with or without loss of tooth substance.
• Infarctions are caused by direct impact to the enamel (e.g. traffic accidents), which explains their frequent occurrence on the labial surface of upper incisors. Various patterns of infarction lines can be seen depending on direction and location of trauma.
• Infarctions are easily visualized by seeing long axis of the tooth from the incisal edge; fiberoptic light sources and transillumination are also useful in detecting infarctions.
• Treatment is layering with composite.

Enamel infraction Resources
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