A Lubricant (550 ml) in dentistry refers to a pressurized spray or liquid lubricant specifically designed for cleaning and maintaining dental handpieces — both high-speed (air turbine) and low-speed (contra-angle and straight) handpieces.

It helps ensure smooth operation, reduces friction, and extends the lifespan of the handpiece by keeping the internal bearings and moving parts properly lubricated.

A Matrix Band Holder, also known as a Tofflemire Retainer, is a dental instrument used to secure a matrix band around a tooth during the placement of restorative materials such as amalgam or composite. It helps recreate the natural contour and contact of the tooth while preventing overhangs and ensuring proper adaptation of the filling.

Components:

1. Head: Holds the matrix band securely; may be straight or contra-angled.

2. Locking Vise: Tightens and locks the matrix band in place.

3. Long Knob (Adjusting Screw): Expands or contracts the loop size of the band to fit around the tooth.

4. Short Knob (Locking Nut): Locks the band firmly to prevent slipping during restoration.

A Mouth Prop, also known as a bite block, is a dental support device used to keep a patient’s mouth open comfortably and safely during dental procedures. It prevents fatigue of the jaw muscles and provides the dentist with better access and visibility to the oral cavity.