ABSTRACT
Objective@#To introduce the application of muscle reconstruction torque balance theory in the new rotating advancement method, and to evaluate the postoperative effect of this method on the nasal lip symmetry of patients with unilateral cleft lip.@*Methods@#A total of 62 patients with unilateral cleft lip were treated with two-dimensional radiography of posterior anterior position and mandibular chin position before, immediately and one-year follow-up. Five indexes representing the symmetry of lip and nose were measured by photoshop software. T test was used to compare the measurement results of each angle or distance index at different times. P<0.05 showed that there was significant difference between the two groups.@*Results@#All the patients who were treated with the technique described in this study obtained satisfactory lip and nasal symmetry immediately and one-year follow-up.@*Conclusions@#The new theory of oral muscle strength balance is a new breakthrough on the basis of the application of muscle reconstruction. It is suitable for the primary repairment of unilateral lip, and good results have been obtained.