Correlation between skeletal and dental changes after mandibular setback surgery-first orthodontic treatment: Cone-beam computed tomography-generated half-cephalograms / 대한치과교정학회지
The Korean Journal of Orthodontics
;
: 59-65, 2015.
Article
in English
| WPRIM
| ID: wpr-133197
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-perpendicular plane (r = 0.758, p = 0.011).CONCLUSIONS:
Greater alterations in the vertical dimension caused larger post-treatment (T2) stage skeletal changes. Studying 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.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Congenital Abnormalities
/
Vertical Dimension
/
Retrospective Studies
/
Cone-Beam Computed Tomography
/
Malocclusion
/
Mandible
/
Maxilla
Type of study:
Observational study
Limits:
Female
/
Humans
/
Male
Language:
English
Journal:
The Korean Journal of Orthodontics
Year:
2015
Type:
Article
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