One of the most important steps of denture fabrication is impression taking. Boucher reported that the primary objectives of complete denture impressions were as follows: 1) retention; 2) stability; 3) support; 4) esthetic value; and 5) preservation of the alveolar ridge . In other words, impression taking is an integral component of complete dentures. Therefore, the accuracy of the impression greatly affects the quality of the dentures and the level of patient satisfaction [5, 6]. Although complete dentures have been described as having a fundamental form based on anatomy , a substantial part of the complete denture border is due to its location in the area of the mucobuccal fold. In the case of mandibular dentures, the border must be located beyond the point of muscle attachment, which complicates the border molding procedure for general dentists . Dental compounds are useful for defining this unclear border, but dentists must learn this technique through practical experience, and the opportunities to do so are limited.