The advantages of Maryland bridge restoration, i.e. resin bonded fixed denture, include no extraction, no anesthesia, cheaper price, etc. The disadvantages include the possibility of caries in the adjacent teeth and cannot be used for incisor restoration. 1. Advantages: Resin-bonded fixed denture almost does not require tooth extraction, has little impact on the surrounding teeth, and is less harmful to the neighboring teeth compared to porcelain restorations. This method does not require anesthesia, and the damage to the roots and pulp is relatively small; it is suitable for temporary restoration of missing teeth and loose teeth caused by periodontal disease; the price is cheaper than that of porcelain teeth and so on. 2. Disadvantages: the doctor’s skills are not good when the bonding is not tight, so that the neighboring teeth caries; can not be used for incisor restoration; the service life is limited, it is not recommended to use for a long time. It is recommended that patients choose the best treatment method under the guidance of professional doctors and in accordance with their own conditions.