Obturation n. : The act of stopping up, or closing, an opening.

Example:
Do General Practitioner Dentists utilize Obturation or standard root canal gutta percha more frequently?

Taxonomy
bullet, obturation, pressure, Obturate, firearms, barrel, pellets, free encyclopedia, firing, barrel bore, lead bullets, Cast Bullet, seals, hollow base, airguns, ammunition, BHN, concave.

Defination from the web:
obturation refers to the process of a bullet or pellet, made of soft material and often with a concave ... To allow obturation in airguns, pellets use soft alloys in conjunction with a thin, concave base designed to expand more easily. ...