Common denture materials are as follows: 1. All-ceramic material: biocompatibility, no irritation to the gums, no allergic reactions. It is metal-free repair and has no effect on the results of nuclear magnetic inspection. It's very good in terms of aesthetics and comfort. This is the most ideal material. The disadvantage is that some special processing techniques lead to relatively high prices. 2. Resin materials: In the early days, resin materials were relatively poor, and now many imported or processed with special technology are not inferior to other materials. The advantage of resin materials is that they are cheaper. The disadvantage is that it is easy to crack and the service life is not long. Generally, it is 3-5 years. In the production, the thickness of the base is intentionally increased, resulting in poor customer adaptability. 3. Precious metal alloy: It has excellent corrosion resistance, oxidation resistance, closeness, and good biocompatibility. It is an ideal metal full crown repair material with relatively high price. 4. Titanium alloy: It contains a small amount of titanium and is still a nickel-based alloy. High strength, corrosion resistance and oxidation resistance meet the basic clinical requirements. 5. Nickel-chromium alloy: It is an alloy commonly used in China at present, with good strength and gold-ceramic bonding force, and stable long-term use effect. The disadvantage is that due to the active chemical properties of metals, long-term use in the mouth will cause the release of metal components, which will cause black lines in the gums. Therefore, it will affect the aesthetic effect of anterior teeth restoration. In addition, some people are allergic to metallic nickel, so they should be used with caution to those who are allergic to known nickel. The price is also cheap. 6. Cobalt-chromium alloy: It has strong metal stability and high corrosion resistance. Under normal circumstances, there will be no black gums or bleeding gums. It is confirmed by some people that this type of porcelain teeth has poor biocompatibility, which may easily cause allergies and cause inflammation of the skin and mucous membranes. The specific use of porcelain teeth should be determined after consultation with a regular hospital attending doctor.