The operation is simple, time-saving and cheap, but the root canal nails are generally thin and have poor strength, and the crown needs to be repaired with resin, so the combination of metal and resin is not very strong. After the whole restoration process is completed, the resin may be separated from the nail, and the nail is metal, which interferes with MRI and CT examination, so the root canal nail must be removed before examination.

Moreover, simple piles are easy to cause root fracture, not corrosion-resistant, weak adhesion and easy to fall off. The biggest advantage is its low price, which is suitable for friends with general economic conditions.

Second, cast piles.

According to different metal materials, it can be divided into nickel-chromium alloy piles, titanium alloy piles, cobalt-chromium alloy piles and precious metal piles. And it will not leave the crown, so it is strong and durable. Because the cast post and core are metal, the physical examination will also be disturbed. Except for the gold post and core, the post and core of other metal materials are metallic, which will make the porcelain teeth slightly dark under the light.

Cast post is more suitable for general dental patients. Cast piles are slightly expensive, have strong adhesion and are not easy to dismantle. Relatively simple piles are not easy to cause root fracture, and precious metal piles are corrosion-resistant. The disadvantage is that because of the metallic color, it can not be used with all-ceramic teeth, and it is not suitable for friends with high aesthetic requirements. Metal posts will affect the physical examination, and they should also be considered when choosing.

Third, fiber piles.

Fiber post is a kind of nonmetal post, and its elastic modulus is similar to dentin. It can better transmit and disperse the bite force than metal post, which is beneficial to prevent root fracture. It has excellent corrosion resistance, good light transmittance and good aesthetic properties of the prosthesis. Fiber piles can be easily removed and repaired or reprocessed, but the price of fiber piles is higher. Fiber post does not contain metal, but it is not suitable for curved root canal of posterior teeth. Fiber post is not affected by metal color and can be used for all-ceramic teeth.