| 摘要 |
Tweezers including two manipulating arms with elastic elements that are terminated by two bits for gripping the lock also include: two projections facing one another, made on the two inside surfaces of the two bits, able to work in a removable manner, with adjustment, with two recesses opposite one another made on the two lateral surfaces of the lock, at least one extension that extends from a free end of at least one of the bits with an incline and over a suitable length at which the extension is able, when the tweezers are in use, to extend essentially parallel to the axis of the tooth in the direction of the occlusal surface, at least one return extending crosswise from a free end of at least one extension, able, when the tweezers are in use, to come to a stop on the occlusal surface of the tooth.
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