Qualitative correlation between postoperatively increased vertical dimension and mandibular position in skeletal class III using partial-least-square path modeling.
10.1186/s40902-017-0114-4
- Author:
Na Ri KIM
1
;
Soo Byung PARK
;
Jihyun LEE
;
Youn Kyung CHOI
;
Sang Min SHIN
;
Yong Seok CHOI
;
Yong Il KIM
Author Information
1. Department of Orthodontics, Pusan National University Hospital, Busan, South Korea. kimyongil@pusan.ac.kr
- Publication Type:Original Article
- Keywords:
Surgery-first approach;
Vertical dimension;
Mandibular position;
Pathway;
Modeling
- MeSH:
Cone-Beam Computed Tomography;
Humans;
Mandible;
Retrospective Studies;
Vertical Dimension*
- From:Maxillofacial Plastic and Reconstructive Surgery
2017;39(6):15-
- CountryRepublic of Korea
- Language:English
-
Abstract:
BACKGROUND: This study constructed a partial-least-square path-modeling (PLS-PM) model and found the pathway by which the postsurgical vertical dimension (VD) affects the extent of the final mandibular setback on the B point at the posttreatment stage for the skeletal class III surgery-first approach (SFA). METHODS: This study re-analyzed the data from the retrospective study by Lee et al. on 40 patients with skeletal class III bimaxillary SFA. Variables were obtained from cone beam computed tomography (CBCT)-generated cephalograms. Authors investigated all variables at each time point to build a PLS-PM model to verify the effect of the VD on the final setback of the mandible. RESULTS: From PLS-PM, an increase in VD10 was found to decrease the absolute value of the final setback amount of the mandible, which reflects the postsurgical physiological responses to both surgery and orthodontic treatment, which, in turn, can be interpreted as an increase in postoperative mandibular changes. CONCLUSIONS: To resolve the issue of collinear cephalometric data, the present study adopted PLS-PM to assess the orthodontic treatment. From PLS-PM, it was able to summarize the effect of increased postsurgery occlusal vertical dimension on the increased changeability of the B point position at the posttreatment stage.
