Sometimes in clinic, we have found that cast crown construction is necessary to fit the existing partial denture clasp, when the abutment is involved with caries, a failing restoration, periodontal disease, or fracture. This is important not only to protect the abutment tooth from missing, but to restore retention, bracing and support for partial denture. For constructing the cast crown, several methods have been reported by many of previous authors. The number of techniques reported during the past are ideal but have uncertain results However, with more improved and practical technic developed by me, the problem becomes more successful. One method in which does not need the laboratory technecian is the wax pattern has been made in chairside waxing by doctor himself. The other in which requires the laboratory technician is to use special impression method and articulator for laboratory waxing. In one case of the reported here, we have successful results in restoring the abutment with cast crown for original denture clasp.