Objective To study the expressions of substance P(SP) in rats with unilateral chew,and to discuss the mechanism of temporomandibular disorders.

• 目的观察磨除单侧后牙造成偏侧咀嚼的大鼠颞颌关节内P物质(SP)的表达情况,进一步探讨颞颌关节病的发病机制。