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Objective: The former dental caries, deformities, trauma can cause masticatory function in patients with pronunciation dysfunction, also affect the appearance of the patients face, causing a certain degree of psychological damage to the patient. The composite resin material is direct restoration of anterior teeth, the most commonly used dental restorative materials, but the chamfer and the lip surface molding more difficult, especially for beginners speaking very difficult. For light-cured resin forming the transparent crown have begun to use, mainly applied to the teeth, and dental materials produced more stringent indications for the use of a limited range. Therefore, this study designed a flexible front teeth for partial crown prefabricated female mold compression to facilitate forming resin restoration of front teeth. Another design a part of the pre-tongue resin repair guides can be preformed tongue to facilitate stuffing analog dentin and lip surface enamel. Part of the crown can be applied to more patients. Methods: This study is divided into three parts: the first part: preformed model made of transparent silicone rubber 1, the finished artificial teeth made of the front teeth silicone rubber female mold made transparent silicone rubber finished the teeth right upper central incisor single tooth teeth crown stamper 4, the female mold is molded according to a predetermined design shape the female die trimmed achieved forming: the use of a scalpel, and the turbine to obtain a female mold by a good shape are designed to be trimmed, to form a nearly Notching lip surface mainly, a far Notching lip surface-based, mainly a nearly Cutaway tongue, transparent female mold of the teeth of a beyond Cutaway tongue mainly of four parts. Part II: in vitro experiments in vitro tooth experiment: collection of crown fracture isolated anterior teeth were randomly divided into 12 groups and corner defect group, 6 each defect preparation, each group was randomly divided into two groups, experimental group and the control group, the experimental group produced elastic female mold light-cured resin filling, the control group received conventional restorative filling. Record the time used in the filling. Packet marking and coloring experiment, from repair, morphology, surface finish, coloring, etc. in accordance with the assessment standards developed assessment scoring. Statistics with statistical methods, to see whether the differences between the experimental and control groups. Part III: Clinical experiments collected the front teeth repair patients in our hospital patients five cases the the prepared crown female mold repair of light-cured resin filling defect site. Its effects were observed. Results: The use front teeth elastic portion pre crown and lingual fix the guide plate to simplify the operation, molding easier, shorten the time to repair, and can reduce the use of the turbine, and largely aesthetic properties can be enhanced after the repair.
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