[Abstract]: Objective How to make temporary crowns more beneficial for clinical work. Methods Before tooth preparation, negative molds were made using alginate elastic impression material, and then temporary crowns were fabricated. Results Provisional crowns were successfully fabricated in 90.32% of cases. Discussion This method is a simple and effective method and completely restores the original shape, occlusal relationship, and masticatory function of the tooth, and is aesthetically comfortable. With the popularity of fixed denture restorations, tooth preparation has become a daily task in restorative dentistry, and the fabrication of temporary crowns is an important step in fixed denture restorations, striving to make the temporary crown fabrication method simpler, faster and more exquisite. In this paper, through the 85 patients, 186 teeth, using the method described below achieved satisfactory results, the experience of the production of temporary crowns is reported as follows: Materials and methods 1, general information: In this group of cases, 37 cases of men, 48 cases of women, the maximum age of 58 years old minimum 18 years old, a total of 186 teeth, 58 cases of anterior teeth, 119 teeth, 27 cases of posterior teeth, 67 teeth. 2, Methods 2, 1 Materials: alginate elastic impression material, self-consolidating tooth-making powder. 2.2 Specific method: Before tooth preparation, if the teeth are defective or decayed, clove oil mucoadhesive powder or wax tablets can be used to restore the normal shape of the teeth first, and then alginate elastic impression material is used to make the negative mold, which is required to cover the temporary crown in the buccolingual direction to completely restore the original shape, occlusal relationship and masticatory function of the teeth. The proximal and distal mesial directions were used to cover the two adjacent teeth of the prepared tooth ①. 2, 3 After the completion of the preparation of the teeth and the taking of the functional mold with the Fitri impression material, adjust the self-consolidating tooth-making powder, and when it becomes dough-like and pliable, place an appropriate amount of the self-consolidating tooth-making powder into the area of the prepared teeth in the earliest prepared negative mold, put the negative mold into the mouth in position, and remove the negative mold from it when the self-consolidating tooth-making powder is basically fixed, and then remove the made temporary crown from the negative mold after it is completely cured, and then trim it until it fits the prepared teeth and the adjacent teeth, and try it on. Try it on, and then polish and bond it. 2.4 Precautions: z1{, use liquid paraffin to coat the gingival mucosa of the molded area to avoid stimulation of the mucosa by the self-consolidating tooth-making powder. z2{, keep the prepared tooth area dry in isolation. z3{ master the time to remove the negative mold from the mouth, because the self-consolidating tooth-making powder polymerizes faster, its plasticizing time at room temperature is generally between 3.5~4.5 minutes after blending. Results The temporary crowns were fully restored to their original shape and seated smoothly, and the occlusal and masticatory functions were normal in 168 teeth, accounting for 90.32%. Temporary crowns were deformed and could not be seated, 11 teeth were redone temporary crowns were difficult to remove 7 teeth were redone, the latter two cases accounted for 9.68%. Discussion Advantages: 1. The shape of the temporary crown completely restores the original shape of the tooth and can temporarily play its occlusal relationship and masticatory function, auxiliary pronunciation function, and temporarily maintain the aesthetic appearance of the tooth and dental alignment. It maintains the stability of the position of the prepared tooth, its neighboring teeth and the opposing teeth, prevents the opposing teeth of the prepared tooth from elongating and the neighboring teeth from tilting and shifting, maintains the shape of the gingival tissue at the neck of the prepared tooth, and prevents gingival hyperplasia ②. Patients feel comfortable and comfortable. 2. Easy to position, simple to operate, easy for doctors to master, shortens treatment time and improves work efficiency. Disadvantages: It is not easy to grasp the timing of the final negative mold removal from the oral cavity. If it is taken early, it is not easy to succeed; if it is taken late, it will be difficult to take out when there is an inverted concavity in the neighboring teeth. Mainly related to the room temperature, the higher the temperature the shorter the time, the lower the temperature the longer the time the doctor’s experience is very important.