Machine needles without safety spring for filling canals with pastes and cements
The needles for filling the canals with a safety spring (PFL),
also called Lentulo needles, are instruments intended for filling the canals with semi-liquid materials (pastes and cements).
Their working part has the shape of an elongated cone and is made of a loosely wound spiral made of thin wire.
The safety spring placed at the handle increases the flexibility of the needles
and protects them against breaking during rotational movements in the canal.
The golden color of the handles allows you to quickly distinguish the needles from other instruments.
Material is inserted only when moving to the right (clockwise), allowable rotational speed of the contra-angle: below 800 rpm, cross-section.