The principle of dental burr grinding？

The principle of dental burr grinding mainly involves the cutting, grinding, and polishing processes of materials that are designed to remove tiny bumps (i.e., burrs) on the surface of the tooth or the edge of the restoration for a smooth, irritation-free result. The following is a detailed analysis of the principle of dental burr grinding:

First, cutting and grinding

1. Cutting: Preliminary trimming of the tooth surface or prosthesis using a knive-shaped or coarse-grained abrasive, with the aim of rapidly reducing the volume and removing obvious bulges. This process is similar to the roughing stage in machining, where excess material is removed by physical cutting action.

2. Grinding: On the basis of cutting, the use of fine-grained grinding tools to further reduce surface roughness, so that the tooth surface or the edge of the restoration is smoother. In the grinding process, the fine-grained particles of the grinding tool can penetrate into the small concave and convex of the tooth surface, and remove fine burrs and uneven parts through friction.

Second, polishing

Polishing is an important part of the dental burring process, which aims to eliminate scratches that may occur during the grinding process, so that the tooth surface or the edge of the restoration can achieve a highly smooth state. The polishing process usually includes mechanical polishing and electrolytic polishing in two ways:

1. Mechanical polishing: Use mechanical rotating polishing tools (such as polishing wheels, polishing brushes, etc.) to polish the tooth surface or restoration. Polishing tools are coated with polishing paste or polishing fluid, which contains fine abrasive particles that rub against the tooth surface or the edge of the restoration during rotation, removing scratches and smoothing the surface.

2. Electrolytic polishing: a method of polishing using electrochemical principles. In the electrolytic polishing process, the tooth surface or restoration acts as an anode and is immersed in a solution containing electrolytes and fed with direct current. Under the action of electrolysis, the convex part of the tooth surface or the edge of the restoration will undergo oxidation-reduction reaction and dissolve, so as to achieve the effect of polishing. However, electrolytic polishing has relatively few applications in the dental field, mainly for the treatment of certain special materials.

Third, precautions

1. Control strength: In the process of burring, it is necessary to strictly control the contact strength between the abrasive tool and the tooth surface or the restoration to avoid tooth damage caused by excessive grinding.

2. Choose the right abrasive tools: Choose the right abrasive tools and polishing tools according to the material and condition of the tooth surface or restoration to ensure the grinding and polishing effect.

3. Protect the surrounding tissues: During the grinding and polishing process, it is necessary to protect the surrounding soft tissues such as gums and oral mucosa to avoid unnecessary damage.

In summary, the principle of dental burr grinding is to remove burrs and uneven parts of the tooth surface or the edge of the restoration through processes such as cutting, grinding and polishing, so that it reaches a smooth, non-irritating state. This process requires delicate operation and professional technical support.