The present invention relates to a U-shaped dental impression tray which forms a mold of teeth, comprising: a first handle and a U-shaped first receiving unit for impression material. The U-shaped first receiving unit for impression material comprises: a first support fixture having a radius of curvature greater than the radius of curvature of a set of teeth a second support fixture having a radius of curvature smaller than the radius of curvature of a set of teeth a first net placed in-between the first and the second support fixtures and a first discharging hole for impression material placed on the upper and lower parts of the curvatures of the first and the second support fixtures around the first net. The U-shaped receiving unit for impression material has an extension unit extended symmetrically from the center of the U-shape beyond the occlusal point of the teeth. Also, the U-shaped dental impression tray which forms a mold for a part of the teeth, comprises: a second handle and a U-shaped second receiving unit for impression material. The U-shaped second receiving unit for impression material comprises: a U-shaped third support fixture having a narrow width where teeth are inserted a second net installed in-between the third support fixtures and a second discharging hole for impression material placed on the upper and lower parts of the curvatures of the third support fixtures around the second net. The dental impression tray is characterized in that the U-shaped second receiving unit for impression material has an extension unit extended symmetrically from the center of the U-shape beyond the occlusal point of the teeth.COPYRIGHT KIPO 2014본원발명은 치아의 본을 뜨는 U자형 치아 인상용 트레이에 있어서, 제1손잡이부 및 U자형 인상재 제1수용부를 포함하고, U자형 인상재 제1수용부는, 곡률 반지름이 치열의 곡률 반지름보다 큰 제1지지대와 곡률 반지름이 치열의 곡률 반지름보다 작은 제2지지대, 및 제1지지대와 제2지지대 사이에 설치되는 제1망포와 제1망포를 중심으로 제1지지대의 곡면 또는 제2지지대의 곡면 상,하부 일측에 각각 뚫려 있는 제1인상재배출공을 포함하고, U자형 인상재 제1수용부는 U자형의 중심으로부터 대칭형으로 연장된 연장부가 구치 교합점 이후까지 연장된 것을 특징으로 하는 치아 인상용 트레이에 관
