V kind hole: To happen with all teeth buccal (lip) , tongue (palate) the hole form of the preparation of caries caustic place of face of tooth of 1/3 of face close gum.

• v类洞：为发生与所有牙齿的颊（唇）、舌（腭）面近龈1/3牙面的龋损所制备的洞形。