The effect of occlusogingival placement of clinical bracket points on the adaptation of a straight wire to the lingual arch form / 대한치과교정학회지
The Korean Journal of Orthodontics
;
: 236-244, 2018.
Article
in English
| WPRIM
| ID: wpr-716088
ABSTRACT
OBJECTIVE:
The aim of this study is to compare the adaptation of a straight wire between brackets positioned at the mid-lingual surface and those placed gingivally by using a three-dimensional simulation software.METHODS:
This cross-sectional study was performed using OrthoAid, an in-house software. The subjects were 36 adolescents with normal Class I occlusion. For each dental cast, two bracket positioning approaches, namely the middle and gingival, were examined. In the middle group, the reference points were placed on the mid-lingual surface of each tooth, while in the gingival group, the reference points were positioned lingually on the anterior teeth. A 4th degree polynomial was adopted, and the in-plane and off-plane root mean squares (RMSs) of the distances between the reference points and the fitted polynomial curve were calculated using the software. Statistical analysis was performed using the paired-samples t-test (α = 0.05).RESULTS:
The mean in-plane RMS of the polynomial curve to the bracket distance in the gingival group was significantly lower than that in the middle group (p < 0.001). The off-plane RMS was higher in the gingivally positioned brackets in the maxilla than in the middle group (p < 0.001). However, the off-plane RMS in mandible was not statistically significantly different between the two groups (p = 0.274).CONCLUSIONS:
The results demonstrated that the gingival placement of lingual brackets on the anterior teeth could decrease the distance between a tooth and the straight wire.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Orthodontics
/
Tooth
/
Cross-Sectional Studies
/
Orthodontic Brackets
/
Mandible
/
Maxilla
Type of study:
Observational study
/
Prevalence study
/
Risk factors
Limits:
Adolescent
/
Humans
Language:
English
Journal:
The Korean Journal of Orthodontics
Year:
2018
Type:
Article
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