Title Page
Contents
Abstract 8
I. Introduction 9
II. Materials and Methods 12
A. Subjects 12
B. Ultrasonographic examination 14
C. Statistical analysis 16
III. Results 17
A. Results of first visit measurements and statistical analysis 17
1. Thickness of masseter muscle 17
2. Comparison of right and left side masseter muscle thickness 17
3. Correlation between masseter muscle thickness and age 18
4. Correlation between masseter muscle thickness and gender 18
5. Correlation between masseter muscle thickness and pain level 18
6. Correlation between masseter muscle thickness and pain duration 20
B. Results of 6-month follow-up measurements after treatment and statistical analysis 22
1. Thickness of masseter muscle 22
2. Comparison between first visit and 6—month follow-up measurements of masseter muscle thickness 22
3. Correlation between masseter muscle thickness decreases in 6 months and treatment type 22
4. Comparison between first arrival and 6—month follow-up pain level of masseter muscle 25
IV. Discussion 26
V. Conclusion 30
References: 31
Appendix: 36
국문 초록 37
Table 1. Group divisions of patients at first visit and 6-month follow-up 13
Table 2. Mean masseter muscle thickness in relaxed and clenched position at first visit 17
Table 3. Pain level of masseter muscle 19
Table 4. Pain duration of masseter muscle 20
Figure 1. Tablet-based ultrasound scanner 14
Figure 2. Transducer location on patient masseter muscle 15
Figure 3. Masseter muscle on ultrasonography (a. Masseter muscle in relaxed position b. Masseter muscle in clenched position) 15
Figure 4. Correlation between masseter muscle thickness and pain duration 21
Figure 5. Decreases of masseter muscle thickness (a. Right masseter muscle in relaxed position b. Right masseter muscle in clenched position c. Left masseter muscle in... 24