Holders facilitate an arrangement of mirrors in an oral cavity of a  patient, preventing formation of the  fingerprints, and also reduce the  risks of casual falling.

Camera works and micro surgery are some of the fields where dental optical mirrors are used. Optical mirrors and a stand are some of the equipment pieces designed with the purpose to ensure integrity, long-term operation and easy practical work.

Different kinds of optical mirrors are used during certain treatment stages; they are also indispensable in making high-quality photographs. Case, holders, and stands were invented to protect against breakage and ensure long-time functioning, and comfort of practical work with optical mirrors.

By cavity preparaition  before inserting the inlay, the main condition is keeping its retention and stability during  functional loadings. For this purpose the form of the corner, formed by lateral walls and the basis of a cavity, has great value. If this corner is clearly expressed and approaches  to direct corner,the inlay will be steady, as the forces affecting a chewing surface of  the inlay, are distributed, transforming into pressure upon the cement and firm layers of the tooth. If this corner tends  to obtuse, the inlay  is fixed worse, as the forces affecting  a chewing surface, are partially transformed to a stretching, displacing the inlay.