A self-designed instrument to evaluate cavosurface angle for class I amalgam cavity preparation: A learning aid

Area of Science:

• Dentistry
• Dental Materials Science
• Restorative Dentistry

Background:

• Amalgam remains a durable posterior restorative material despite ongoing debates.
• Cavity preparation geometry, particularly the cavosurface angle, critically influences amalgam restoration margins and tooth health.
• The low edge strength of amalgam necessitates careful consideration of the cavosurface angle while prioritizing tooth conservation.

Purpose of the Study:

• To present a self-designed instrument for evaluating and achieving a cavosurface angle near 110° for amalgam restorations.
• To enhance the precision of cavity preparation for improved restorative outcomes.
• To facilitate the conservation of tooth structure during restorative procedures.

Main Methods:

• Development and presentation of a novel, self-designed instrument for dental cavity preparation.
• The instrument is engineered to evaluate and achieve specific cavosurface angles.
• The design also incorporates capabilities for assessing cavity depth, undercut angles, and finishing buccal/lingual walls.

Main Results:

• The instrument allows for the evaluation and attainment of a cavosurface angle close to 110°.
• It provides means to measure cavity depth and undercut angles accurately.
• The tool facilitates precise finishing of buccal and lingual walls, contributing to optimal cavity preparation.

Conclusions:

• The developed instrument offers a practical solution for achieving optimal cavosurface angles in amalgam cavity preparations.
• This innovation supports enhanced marginal integrity and longevity of amalgam restorations.
• The instrument aids dental professionals in balancing restorative material requirements with conservative tooth preparation techniques.