Figure 2From: Expandable Micro-motor Bur, design of a new device for least invasive extraction of broken teeth roots Open-window approach for root is indicated when buccocrestal bone must be maintained. A) three-cornered flap is reflected to expose area overlying apex of root fragment being recovered, B) bur is used to uncover apex of root and allow sufficient access for insertion of straight elevator and C) small straight elevator is then used to displace root out of its socket [1].Back to article page