目的探讨NS牙面涂料对牙本质过敏症的治疗机制。
Found in the scales of Palaeozoic fishes as a superficial layer over a dentine structure.发现于古生代鱼类的鳞片形成覆于齿质结构之上的表面层。
AIM: to observe the effects of treatment on hypersensitive dentine by semi-conductor laser.目的:观察半导体激光治疗牙齿感觉过敏症的疗效。