Three-dimensional effect of two anterior maxillary segmental osteotomies on nasal morphology
10.3760/cma.j.issn.1009-4598.2020.02.006
- VernacularTitle:两种上颌前份截骨后退术对鼻部形态的影响
- Author:
Yangyang LIN
1
;
Yanni LI
;
Na PI
;
Dali SONG
;
Min HOU
Author Information
1. 天津市口腔医院，南开大学口腔医院正颌外科 300041
- Keywords:
Bimaxillary protrusion;
Maxillary anterior osteotomy;
Three-dimentional analysis
- From:
Chinese Journal of Plastic Surgery
2020;36(2):134-139
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To evaluate the effect of two kinds of anterior maxillary segmental osteotomies on nasal morphology.Methods:30 patients with bimaxillary protrusion were included at from Tianjin Stomatological Hospital Between January 2015 and December 2017. There were 8 males and 22 females aged from 19 to 32 years old, the patients were randomly divided into the traditional operation group and modified operation group according to the order of treatment. 20 patients underwent traditional anterior maxillary osteotomy while 10 patients underwent modified osteotomy. Pre- and post-operative 1-year CBCT data of 30 patients were imported in Proplan CMF software, to reconstruct the 3D model of the nose and select characteristic landmarks. Three locating planes and 3D point measurement system were established, Relevant indices consisted of nasolabial angle, upper and lower nasolabial angle, nasal tip angle, nasal tip inclination, nasal columella inclination, nasal height, depth of nasal tip, vertical nasal tip position, nasal alar base width, inner canthic diameter, nasal columella height, bilateral nasal axis angle, nostril area and the comparison between two groups were conducted using paired-samples t test, the effect of two surgical methods on nasal morphology were evaluated. Results:There were statistically significant differences between the nasolabial angle, nasal columella inclination, nasal height, nasal alar base width between preoperative group(113.74°±9.42°, 120.06°±7.73°)and postoperative group (121.93°±4.05°, 129.86°±7.63°), whereas no significant difference among nasal tip angle, nasal tip inclination, vertical nasal tip position, nasal columella height, bilateral nasal axis angle and nostril area in traditional operative group. However, in the modified operation group, there were statistically significant differences in the nasolabial angle, vertical nasal tip position between preoperative group [110.75°±1.67°and(11.87±1.39) mm] and postoperative group [122.42°±6.95° and(11.16±1.02) mm], whereas no significant difference among other measurement items.Conclusions:Compared with the traditional osteotomies, the modified method has little influence on the nasal morphology after operation, meanwhile achieve good surgical result. However, the modified surgical method has its own indications, flexible application can obtain the best surgical result and patient satisfaction.
