What material is used for root canal filling?

There are three kinds of root canal filling materials:

Solid class

Among them, there are two kinds of gutta percha tips: cold gutta percha tips and hot gutta percha tips, silver tips with high mechanical properties, and plastic tips usually made of polypropylene or polystyrene.

dough

It is divided into thymol paste, iodoform paste, calcium hydroxide paste, root canal paste and zinc oxide clove oil root canal filling material.

liquid

Mainly phenolic resin.

Extended data:

Root canal filling materials are used to fill root canals during root canal therapy, eliminating dead space and preventing reinfection in root canals.

Properties of root canal filling materials;

1. can promote the healing of lesions without stimulating periapical tissue;

2. The volume does not shrink, and there is no gap with the root canal wall;

3. It is resistant to X-ray diffraction;

4. The operation is simple, and it can be taken out from the root canal if necessary;

5. It can be stored in root canal for a long time without being absorbed;

6. Don't discolor your teeth;

Root canal filling method

Single tip method

The single-tip method was mainly popular in the 1960s, and the main tip was pasted and filled. The main tip includes gutta percha tip, silver tip and titanium tip, and the compatibility between the main tip and root canal is the key to the success of this method. However, according to ISO standard, the error range of equipment diameter is 0.02 mm for standard stainless steel file and 0.05 mm for gutta percha tip. If the extreme value is taken, the maximum error will reach 0.07 mm ..

Cold gutta-percha lateral pressure method

Cold gutta percha lateral pressure method is the most commonly used root canal filling method at present, and it is also a standard positive control method to evaluate a new root canal filling method. The purpose of lateral pressure is to reduce the amount of paste, increase the amount of gutta percha and seal the root canal. It is required that the diameter of root canal orifice is the largest, the apical foramen is the smallest, and the root canal is a funnel-shaped structure with continuous taper. The gutta percha tip is round, so there are always gaps between the main tip and the auxiliary tip, and between the gutta percha tip and the root canal wall, so it is difficult to achieve tight filling, and bacteria can reach the periapical tissue through these channels.

Vertical pressure method of hot gutta percha

The vertical pressure filling method of hot gutta percha was put forward by Herbert Schild, and it was gradually applied and popularized after the concept of three-dimensional filling came into being. The core of hot gutta percha vertical pressure filling method is to heat and soften the root canal filling material, and then press gutta percha into the whole root canal system with sufficient vertical pressure. Its technical sensitivity is very high, and it needs continuous taper preparation to keep the original direction of root canal and the position of the original apical foramen. The smaller the diameter of apical foramen, the better. An apical abutment can be prepared at the top of root canal, which can effectively remove the infection in root canal without changing the original position and shape of apical foramen. And the pressure of hot gutta percha filling can not only fill the whole root canal, but also minimize the root filling material from exceeding the apical foramen.

Nuclear carrier filling technology

Core carrier filling technology is to wrap a layer of α-phase gutta percha outside the resin or metal core to form a root canal filling body, which is directly inserted into the root canal after heating. It is required that a continuous funnel-shaped root canal with large taper should be formed during root canal preparation, and its shape should be suitable for Thermafil. However, even if the core carrier filling technology is used, it is difficult to completely fill the concave part of the root canal. Therefore, root canal preparation and root canal cleanliness are very important, which determine the shape and quality of root canal filling.

References:

Baidu encyclopedia-root canal filling material