首先我不是托，在网上啥逛的时候发现了这个美国出品的拔牙利器，特别是对于难缠的上颌磨牙，很巧妙的设计，因为改变了支点，避开根尖1/3才的脆弱部位，减少断根率，整体拔出，不用分根，能做到极速拔出，不过也不能太迷信一样东西，不知道中国有没有代理？

    最近上网翻了翻资料，原来这个东东叫 Physics Forceps 。。。

    在美国的售价是两百多美刀。下面我把它的官方网站展示的说明贴出来让大家看看。

    How do the Physics Forceps? differ from the conventional forceps?
    Regular extraction forceps' beaks are adapted to the buccal and lingual contours of the tooth. Rotational and tractional movements are used （squeezing， pulling， grabbing）. Current Instruments require two equal forces placed on the crown of the tooth， and a third force to extract the tooth with your arm. If the crown is missing or the tooth is decayed you need to lay a flap， cut the bone， and perform surgery to remove the tooth. This is time consuming， painful， and traumatic for the patient.

    传统的牙钳需要3个力作用正在牙齿上，其中两个平衡力就作用在牙冠的颊舌侧，操作者的手臂牵拉和挤压作为第三个力。一旦遇到牙冠不完整甚至缺失的情况，就可能有需要去骨等外科操作来完成拔牙，这会增加患者的痛苦。
    The Physics Forceps? requires no squeezing， pulling， or grabbing. Instead， once in position the handles are rotated toward the facial aspect of the tooth. The Physics Forceps? require two opposing forces. The first force is placed into the lingual sulcus of the tooth below the gingival with the beak. The second force is placed on the alveolar ridge with the bumper. Therefore there is only one point of contact on the tooth with the Physics Forceps. These two opposing forces cancel the need for a third force. If the crown is missing or the tooth is decayed there is no need to lay a flap because these same principles apply .

    PhddPhysicsForceps牙钳不需要用到牵拉，挤压，钳取等动作，一旦牙钳就位了就只需两个力，其一力是作用在患牙颊侧牙龈下的前庭沟上，第二个力是作用在牙槽嵴上，以此只有一点接触到牙齿，不需要第三个力的牵引了。同样的道理，遇到残冠也不需要害怕。

    （本人英文水平有限，粗略翻译不对请指正。上面的意思在我看来是这样理解的，我举个例子，就好像开啤酒瓶盖，你说用钳子钳掉盖瓶好开还是用开瓶器撬开好开，哪个省力？道理差不多，就是在颊侧前庭沟找一个支点，把牙齿撬出来。当然，我觉得这样一定会对颊侧骨板造成一定的骨折，不过这的确是一个省力省时的方法。以上是鄙人愚见，不足请指正。）

    Is elevating required with the Physics Forceps??
    No elevation is required. Although in some cases you may want to separate the gingival attachment from the tooth.

    上面的意思是说用Physics Forceps几本上可以不用牙挺。除非分离牙龈.