Inlay filling is a commonly used treatment in dentistry, and compared with other restorations, there are some unfavorable factors, mainly the difficulty of tooth preparation, long outer edge margin line, high bonding requirements. 1. Difficulty in preparation of the tooth body: inlay teeth need to be prepared with more tissues, higher requirements, more processes, more workload, longer time-consuming, and thus the patient will feel tired, and sometimes there will be discomfort in the jaw joints. 2. Long outer edge margin line: the joints between the edge of the inlay and the tooth tissue are large, and even though it will be filled with adhesive during the bonding process, it will be easily dislodged if the adhesive is dissolved. 3. High bonding requirements: due to the inlay dentin tissue grinding less, it will make the inlay retention force becomes smaller, so the inlay needs a higher bonding strength, which brings more difficulties to the doctor, if the doctor in the process of bonding, a little error, may lead to a decline in the adhesive force, thus making the inlay easy to fall off. After inlay filling, you should avoid eating some sticky food, harder food, etc. to prevent the inlay from falling off.