1.Methods 68 cases with mandible fracture were treated with the rigid internal fixation by the small clamping plank under the intermaxillay elastic traction. After operation, the elastic traction hat braking skull and jaw replaced the tooth bow clamping plank.
3.The dark-gray traction current deposits belong to internal-tide deposits, it develops sandstones and siltsands, and charactered with lenticular, wave, flaser bedding, bimodal cross-bedding and ripple mark.
