[Masseter thickness measured by ultrasonography of 50 young healthy adults in relation to facial morphology].
摘要
OBJECTIVE: To quantify the normal range of the ultrasonically measured thickness of the masseter which is related to the variation of the facial morphology in different young individuals. METHODS: The masseter thickness of 50 young healthy adults (25 men and 25 women) was measured bilaterally under relaxed conditions and with maximal clenching by a real-time ultrasound imaging technique. The relation between masseter thickness and facial morphology was also observed. RESULTS: Under relaxed conditions, the mean thickness of the muscle in men was(11.83 +/- 1.19) mm, and under contracted conditions, (15.51 +/- 1.40) mm. In women, the respective measurements were(9.84 +/- 1.03) mm and (13.02 +/- 1.10) mm. In men the thickness of masseter had a negative linear correlation to the indices of FH/FWa (the ratio of the anterior facial height to the intergonial width) and FWz/FWa (the ratio of the bizygomatic facial width to the intergonial width). CONCLUSIONS: The mean thickness of the masseter in men was larger than that in women, and the thickness of the muscle was related to the male facial morphology.