Abstract: Class II malocclusion is one of the most prevalent malocclusions. The locked teeth between upper and lower arch often discount its sagittal correction. Clinically, it is a valid method by reshaping the cusp of the teeth, followed by redistributing the occlusal force, and finally achieving directional movement. This paper reported a case successfully corrected by the method of cusp reshaping. Besides, relevant literature was reviewed to discuss the biomechanics, so as to provide a reference for clinical treatment.

Key words: Bite force, Saggital correction, Occlusal force