Step 6 Sub Orbicularis Dissection

Scissors with slightly blunted tips are used to dissect through the orbicularis oculi muscle (by spreading in the direction of the muscle) to the periosteum overlying the lateral orbital rim (Fig. 216). The muscle is dissected initially over the bony rim because the depth is much easier to determine here than over the orbital septum. Supraperiosteal dissection continues in this submuscular plane inferiorly along the lateral rim, over the anterior edge of the infraorbital rim, and finally, the scissors are used to spread upward in this pocket into the lower eyelid (Figs. 2-17 and 218). The supraperiosteal dissection places the instrument in the proper plane for dissection into the lower eyelid, i.e., between the orbicularis oculi muscle and the orbital septum. The convexity of the curved scissors is outward.

Figure 2-16 Use of scissors to dissect through orbicularis oculi muscle over lateral orbital rim to identify periosteum.

Figure 2-17 Dissection between orbicularis oculi muscle and orbital septum. The dissection should extend completely along the orbital rim and superiorly to the level of subcutaneous dissection.

Figure 2-17 Dissection between orbicularis oculi muscle and orbital septum. The dissection should extend completely along the orbital rim and superiorly to the level of subcutaneous dissection.

Orbicularis Orbital Septum
Figure 2-18 Sagital plane through orbit showing level and extent of dissection. Note the bridge of orbicularis oculi muscle remaining between the lid and skin/muscle flap.

Was this article helpful?

0 0
How To Reduce Acne Scarring

How To Reduce Acne Scarring

Acne is a name that is famous in its own right, but for all of the wrong reasons. Most teenagers know, and dread, the very word, as it so prevalently wrecks havoc on their faces throughout their adolescent years.

Get My Free Ebook


Post a comment