Facial profile and frontal changes after bimaxillary surgery in patients with mandibular prognathism
Background/Purpose: Patients are always concerned about their postoperative appearance before surgery for facial deformity correction. The present study investigated the facial profile and frontal changes following two-jaw surgery. Methods: Forty patients who underwent two-jaw surgery were divided b...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2018-07-01
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| Series: | Journal of the Formosan Medical Association |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0929664617301717 |
| _version_ | 1818947765531574272 |
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| author | Chun-Ming Chen Michael Yuan-Chien Chen Jung-Hsuan Cheng Kwei-Jing Chen Yu-Chuan Tseng |
| author_facet | Chun-Ming Chen Michael Yuan-Chien Chen Jung-Hsuan Cheng Kwei-Jing Chen Yu-Chuan Tseng |
| author_sort | Chun-Ming Chen |
| collection | DOAJ |
| description | Background/Purpose: Patients are always concerned about their postoperative appearance before surgery for facial deformity correction. The present study investigated the facial profile and frontal changes following two-jaw surgery. Methods: Forty patients who underwent two-jaw surgery were divided by the amount of mandibular setback (group I: ≤8 mm and group II: >8 mm). Cephalometric radiograms (lateral and frontal) were collected and analyzed at three intervals: preoperatively (T1), immediately postoperatively (T2), and final follow-up (T3). The following points were identified: cheek points (C1–C5), pronasale (Prn, tip of the nose), anterior nasal spine (ANS), subnasal (Sn), point A, labrale superius (Ls), incision superius (Is), labrale inferius (Li), incision inferius (Ii), point B, labiomental sulcus (Si), pogonion (Pog), soft tissue pogonion (PogS), ramus point (RP), and gonion (Go). The immediate postoperative changes (T21), final postoperative changes (T32), and final stability (T31) were calculated and analyzed. Results: In T31, the cheek line showed significant advancements of 2.3 mm (group I) and 1.6 mm (group II). The soft:hard tissue ratios were significantly correlated: Prn:ANS (0.37:1), Prn:A (0.39:1), Sn:A (0.85:1), C3:A (0.82:1), Ls:Is (0.92:1), Li:Ii (0.91:1), Si:B (0.88:1), and PogS:Pog (group I, 0.78:1 and group II, 0.93:1). The intercondylion and intergonial widths of group II (T31) significantly increased 1.8 and 4 mm, respectively. Regarding the postoperative skeletal stability (T32), group I showed significant correlations between amounts of mandibular setback, but group II did not. Conclusion: In the facial profile, the cheek line showed significant advancement postoperatively. The frontal mandibular transverse dimensions were significantly increased. Keywords: Facial profile, Frontal dimension, LeFort I operation, Mandibular prognathism, Sagittal split ramus osteotomy, Relapse |
| first_indexed | 2024-12-20T08:36:06Z |
| format | Article |
| id | doaj.art-22462aaaf5e24e588f8c555f5dd4e6f4 |
| institution | Directory Open Access Journal |
| issn | 0929-6646 |
| language | English |
| last_indexed | 2024-12-20T08:36:06Z |
| publishDate | 2018-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of the Formosan Medical Association |
| spelling | doaj.art-22462aaaf5e24e588f8c555f5dd4e6f42022-12-21T19:46:33ZengElsevierJournal of the Formosan Medical Association0929-66462018-07-011177632639Facial profile and frontal changes after bimaxillary surgery in patients with mandibular prognathismChun-Ming Chen0Michael Yuan-Chien Chen1Jung-Hsuan Cheng2Kwei-Jing Chen3Yu-Chuan Tseng4Department of Oral and Maxillofacial Surgery, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan; School of Dentistry, College of Dental Medicine, Kaohsiung Medical University, Kaohsiung, TaiwanDepartment of Dentistry, China Medical University Hospital, China Medical University, Taichung, Taiwan; School of Dentistry, College of Medicine, China Medical University, Taichung, TaiwanSchool of Dentistry, College of Dental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan; Department of Orthodontics, Kaohsiung Medical University Hospital, Kaohsiung, TaiwanDepartment of Dentistry, China Medical University Hospital, China Medical University, Taichung, TaiwanSchool of Dentistry, College of Dental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan; Department of Orthodontics, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan; Corresponding author. Department of Orthodontics, Kaohsiung Medical University Hospital, No. 100, Shih-Chuan 1st Road, Kaohsiung 80708, Taiwan. Fax: +886 7 3221510.Background/Purpose: Patients are always concerned about their postoperative appearance before surgery for facial deformity correction. The present study investigated the facial profile and frontal changes following two-jaw surgery. Methods: Forty patients who underwent two-jaw surgery were divided by the amount of mandibular setback (group I: ≤8 mm and group II: >8 mm). Cephalometric radiograms (lateral and frontal) were collected and analyzed at three intervals: preoperatively (T1), immediately postoperatively (T2), and final follow-up (T3). The following points were identified: cheek points (C1–C5), pronasale (Prn, tip of the nose), anterior nasal spine (ANS), subnasal (Sn), point A, labrale superius (Ls), incision superius (Is), labrale inferius (Li), incision inferius (Ii), point B, labiomental sulcus (Si), pogonion (Pog), soft tissue pogonion (PogS), ramus point (RP), and gonion (Go). The immediate postoperative changes (T21), final postoperative changes (T32), and final stability (T31) were calculated and analyzed. Results: In T31, the cheek line showed significant advancements of 2.3 mm (group I) and 1.6 mm (group II). The soft:hard tissue ratios were significantly correlated: Prn:ANS (0.37:1), Prn:A (0.39:1), Sn:A (0.85:1), C3:A (0.82:1), Ls:Is (0.92:1), Li:Ii (0.91:1), Si:B (0.88:1), and PogS:Pog (group I, 0.78:1 and group II, 0.93:1). The intercondylion and intergonial widths of group II (T31) significantly increased 1.8 and 4 mm, respectively. Regarding the postoperative skeletal stability (T32), group I showed significant correlations between amounts of mandibular setback, but group II did not. Conclusion: In the facial profile, the cheek line showed significant advancement postoperatively. The frontal mandibular transverse dimensions were significantly increased. Keywords: Facial profile, Frontal dimension, LeFort I operation, Mandibular prognathism, Sagittal split ramus osteotomy, Relapsehttp://www.sciencedirect.com/science/article/pii/S0929664617301717 |
| spellingShingle | Chun-Ming Chen Michael Yuan-Chien Chen Jung-Hsuan Cheng Kwei-Jing Chen Yu-Chuan Tseng Facial profile and frontal changes after bimaxillary surgery in patients with mandibular prognathism Journal of the Formosan Medical Association |
| title | Facial profile and frontal changes after bimaxillary surgery in patients with mandibular prognathism |
| title_full | Facial profile and frontal changes after bimaxillary surgery in patients with mandibular prognathism |
| title_fullStr | Facial profile and frontal changes after bimaxillary surgery in patients with mandibular prognathism |
| title_full_unstemmed | Facial profile and frontal changes after bimaxillary surgery in patients with mandibular prognathism |
| title_short | Facial profile and frontal changes after bimaxillary surgery in patients with mandibular prognathism |
| title_sort | facial profile and frontal changes after bimaxillary surgery in patients with mandibular prognathism |
| url | http://www.sciencedirect.com/science/article/pii/S0929664617301717 |
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