SybronEndo retractors are designed specifically for apical surgery. SybronEndo’s surgical retractors reduce slippage and minimize tissue impingement. With oversized handles, abraded surfaces, and thumb-supports, SybronEndo cheek retractors are both ergonomically and clinically superior. The Carr retractors have a serrated edge that can easily rest in a groove created by the doctor. This takes pressure off of an assistant who holds back the flap and reduces the occurrence of slippage on the bone.