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Identifying a safe zone for midface augmentation using anatomic landmarks for the infraorbital foramen
Ralf Raschke1, Ron Hazani, Michael J Yaremchuk
1Massachusetts General Hospital-Harvard Medical School, Boston, MA 02114-3117, USA.
Aesthetic Surgery Journal
|December 11, 2012
Summary
This study identifies a safe dissection zone for midface augmentation, crucial for avoiding infraorbital nerve injury. Understanding these anatomical landmarks helps surgeons safely place implants and prevent sensory loss.
Area of Science:
- Plastic Surgery
- Anatomy
- Facial Reconstruction
Background:
- Midface augmentation enhances facial aesthetics and contour, often aiding reconstructive surgery.
- A significant risk involves infraorbital nerve (IOF) injury, causing facial numbness and morbidity.
Purpose of the Study:
- To define a safe surgical zone for subperiosteal midface implant placement.
- To prevent infraorbital nerve damage during augmentation procedures.
Main Methods:
- Utilized 44 adult hemiface CT scans to precisely locate the infraorbital foramen (IOF).
- Measured distances from the IOF to key bony and dental landmarks.
- Analyzed data considering transconjunctival and intraoral surgical approaches.
Main Results:
- The IOF typically aligns vertically with the second premolar tooth.
- Provided average distances from the IOF to the infraorbital rim, piriform aperture, lateral orbital rim, and second premolar cusps in males and females.
- Established specific measurements for a safe dissection area.
Conclusions:
- A novel safe zone for midface augmentation dissection has been identified.
- This anatomical knowledge aids surgeons in avoiding infraorbital nerve injury.
- Improved surgical outcomes and reduced patient morbidity are anticipated.
