Temporal changes in nasal morphology following Le Fort I osteotomy : A three dimensional analysis
- 주제(키워드) Le Fort I osteotomy , nasal soft tissue , three dimensional analysis
- 주제(DDC) 617.6
- 발행기관 아주대학교 임상치의학대학원
- 지도교수 Seung Il Song
- 발행년도 2025
- 학위수여년월 2025. 8
- 학위명 석사
- 학과 및 전공 임상치의학대학원 임상치의학과
- 실제URI http://www.dcollection.net/handler/ajou/000000035064
- 본문언어 영어
- 저작권 아주대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
Objectives: This study aimed to investigate the patterns of nasal soft tissue changes over time following Le Fort I osteotomy using three-dimensional analysis. Additionally, the study sought to identify relationships between maxillary movements and nasal soft tissue changes. Materials and Methods: The study included 57 adult patients (25 females, 32 males, mean age 22.86±4.05 years) who underwent Le Fort I osteotomy at Ajou University Dental Hospital between 2013 and 2024. CBCT scans were obtained at T0, T1, and T2. Three-dimensional models were generated, and anatomical landmarks were manually identified by a single examiner. Repeated measures ANOVA with post-hoc analysis was performed to evaluate changes in nasal soft tissue measurements across the three time points. Multiple linear regression analysis was used to investigate the relationship between maxillary movement and changes in nasal soft tissue morphology. Results: Repeated measures ANOVA revealed significant changes over time in all nasal soft tissue measurements (p<0.001). Alar width, alar base width, nostril width, inferior nasal angle, and nasolabial angle significantly increased from T0 to T1 (p<0.001) and significantly decreased from T1 to T2 (p<0.05). For nasal protrusion, a significant increase was observed between T0 and T1 (p<0.001), but the change from T1 to T2 was not statistically significant (p=0.197). Nasal height significantly decreased from T0 to T1 (p<0.001) and there was no statistically significant difference between T1 and T2 (p=0.201). Multiple linear regression analysis showed that alar width increased by 0.227mm, inferior nasal angle by 0.948°, and nasal protrusion by 0.242mm per 1mm of anterior maxillary movement. Nostril width increased by 0.187mm per 1mm of superior maxillary repositioning. Conclusion: The patterns of changes over time revealed through our analysis are likely due to the time required for soft tissue stabilization after surgery. This suggests that evaluating outcomes only in the short term might not accurately represent final results. The findings about maxillary movement and nasal changes in our study appear consistent with generally known trends, though results are different across various studies. This difference seems to occur because of multiple diverse factors rather than just one or two elements.
more목차
Ⅰ. INTRODUCTION 1
Ⅱ. MATERIALS AND METHODS 4
A. Patients 4
B. CBCT examination 4
C. Data Analysis 5
D. Statistical analysis 5
Ⅲ. RESULTS 12
Ⅳ. DISCUSSION 19
Ⅴ. CONCLUSION 26
REFERENCES 27
국문요약 31
