Porion

Porion is an anatomical landmark located in the human skull. It is the highest point of the external auditory meatus, or the external opening of the ear. The porion is used as a reference point in cranial measurements and in the construction of cephalometric analyses.

Anatomy

The porion is located on the temporal bone of the skull, specifically on the upper margin of the external auditory meatus. It is one of the key landmarks used in cephalometric analysis, a diagnostic tool used in orthodontics and oral and maxillofacial surgery to assess the relationships of the teeth and facial bones.

Clinical Significance

The location of the porion can vary among individuals, which can affect the accuracy of cephalometric analyses. Some studies have suggested that the use of the porion as a reference point may lead to errors in these analyses, particularly in cases where the patient has a deformity or asymmetry of the skull.

See Also

• Cephalometry
• Temporal bone
• Orthodontics
• Oral and maxillofacial surgery

References

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