Correlation between skeletal and dental changes after mandibular setback surgery-first orthodontic treatment: Cone-beam computed tomography-generated half-cephalograms
2
조회
0
다운로드
4
인용
0
참고문헌
키워드
초록
Objective: To investigate skeletal and dental changes after application of a mandibular setback surgery-first orthodontic treatment approach in cases of skeletal Class III malocclusion. Methods: A retrospective study of 34 patients (23 men, 11 women; mean age, 26.2 ± 6.6 years) with skeletal Class III deformities, who underwent surgery-first orthodontic treatment, was conducted. Skeletal landmarks in the maxilla and mandible at three time points, pre-treatment (T0), immediate-postoperative (T1), and post-treatment (T2), were analyzed using cone-beam computed tomography (CBCT)-generated half-cephalograms. Results: The significant T0 to T1 mandibular changes occurred −9.24 ± 3.97 mm horizontally. From T1 to T2, the mandible tended to move forward 1.22 ± 2.02 mm, while the condylar position (Cd to Po-perpendicular plane) shifted backward, and the coronoid process (Cp to FH plane) moved vertically. Between T1 and T2, the vertical dimension changed significantly (p < 0.05). Changes in the vertical dimension were significantly correlated to T1 to T2 changes in the Cd to Po-perpendicular plane (r = −0.671, p = 0.034), and in the Cp to FH plane (r = 0.733, p = 0.016), as well as to T0 to T1 changes in the Cp to Po-per pendicular plane (r = 0.758, p = 0.011). Conclusions: Greater alterations in the vertical dimension caused larger post-treatment (T2) stage skeletal changes. Stu dying the mandibular position in relation to the post-surgical vertical dimension emphasized the integral importance of vertical dimension control and proximal segment management to the success of surgery-first orthodontic treatment.[Korean J Orthod 2015;45(2):59-65]
Abstract
Objective: To investigate skeletal and dental changes after application of a mandibular setback surgery-first orthodontic treatment approach in cases of skeletal Class III malocclusion. Methods: A retrospective study of 34 patients (23 men, 11 women; mean age, 26.2 ± 6.6 years) with skeletal Class III deformities, who underwent surgery-first orthodontic treatment, was conducted. Skeletal landmarks in the maxilla and mandible at three time points, pre-treatment (T0), immediate-postoperative (T1), and post-treatment (T2), were analyzed using cone-beam computed tomography (CBCT)-generated half-cephalograms. Results: The significant T0 to T1 mandibular changes occurred −9.24 ± 3.97 mm horizontally. From T1 to T2, the mandible tended to move forward 1.22 ± 2.02 mm, while the condylar position (Cd to Po-perpendicular plane) shifted backward, and the coronoid process (Cp to FH plane) moved vertically. Between T1 and T2, the vertical dimension changed significantly (p < 0.05). Changes in the vertical dimension were significantly correlated to T1 to T2 changes in the Cd to Po-perpendicular plane (r = −0.671, p = 0.034), and in the Cp to FH plane (r = 0.733, p = 0.016), as well as to T0 to T1 changes in the Cp to Po-per pendicular plane (r = 0.758, p = 0.011). Conclusions: Greater alterations in the vertical dimension caused larger post-treatment (T2) stage skeletal changes. Stu dying the mandibular position in relation to the post-surgical vertical dimension emphasized the integral importance of vertical dimension control and proximal segment management to the success of surgery-first orthodontic treatment.[Korean J Orthod 2015;45(2):59-65]
참고문헌 (14)
- Park KR, "Surgery-first approach on patients with temporomandibular joint disease by intraoral vertical ramus osteotomy", Oral Surg Oral Med Oral Pathol Oral Radiol, 116, pp.e429~436 (2013)
- Hernández-Alfaro F, "“Surgery first" in bimaxillary orthognathic surgery", J Oral Maxillofac Surg, 69, pp.e201~207 (2011)
- Nagasaka H, "“Surgery first" skeletal Class III correction using the Skeletal Anchorage System", J Clin Orthod, 43, pp.97~105 (2009)
- Liou EJ, "Surgery-first accelerated orthognathic surgery:postoperative rapid orthodontic tooth movement", J Oral Maxillofac Surg, 69, pp.781~785 (2011)
- Baek SH, "Surgery-first approach in skeletal class III malocclusion treated with 2-jaw surgery: evaluation of surgical movement and postoperative orthodontic treatment", J Craniofac Surg, 21, pp.332~338 (2010)
- Liou EJ, "Surgery-first accelerated orthognathic surgery:orthodontic guidelines and setup for model surgery", J Oral Maxillofac Surg, 69, pp.771~780 (2011)
- Hwang DS, "Effect of intended manual condylar positioning on skeletal and dental changes in Skeletal Class III deformities: CBCTgenerated half-cephalograms", J Craniomaxillofac Surg, 42, pp.7~12 (2014)
- Kim SJ, "The reliability of cone-beam computed tomography (CBCT) - generated frontal cephalograms", J Craniomaxillofac Surg, 40, pp.e331~336 (2012)
- Hyeon-Shik Hwang, "Use of Reference Ear Plug to improve accuracy of lateral cephalograms generated from cone-beam computed tomography scans", 대한치과교정학회지, 43(2), pp.54~61 (2013), 대한치과교정학회
- Lee JH, "The 3D CT superimposition method using image fusion based on the maximum mutual information algorithm for the assessment of oral and maxillofacial surgery treatment results", Oral Surg Oral Med Oral Pathol Oral Radiol, 114, pp.167~174 (2012)
- Kang SH, "Early orthognathic surgery with three-dimensional image simulation during presurgical orthodontics in adults", J Craniofac Surg, 22, pp.473~481 (2011)
- 전재호, "New bimaxillary orthognathic surgery planning and model surgery based on the concept of six degrees of freedom", 대한치과교정학회지, 43(1), pp.42~52 (2013), 대한치과교정학회
- 황대석, "III급 부정교합에서 선수술 교정치료를 통한 양악 수술 후 안정성", Maxillofacial Plastic Reconstructive Surgery, 33(5), pp.407~412 (2011), 대한악안면성형재건외과학회
- Kim YI, "Evaluation of intersegmental displacement according to osteosynthesis method for mandibular setback sagittal split ramus osteotomy using cone-beam computed tomographic superimposition", J Oral Maxillofac Surg, 70, pp.2893~2898 (2012)