TY - JOUR
T1 - Correlation in changes in the upper and lower incisor inclinations toward the nasolabial angle and mentolabial angle in non-extraction Class i malocclusion orthodontic treatment
AU - Widayati, Retno
AU - Sariesendy, null
AU - Setiawan, S.C.
N1 - Publisher Copyright:
© Published under licence by IOP Publishing Ltd.
PY - 2018/9/7
Y1 - 2018/9/7
N2 - Non-extraction orthodontic treatment in borderline cases is reported, according to some authors, to lead to upper and lower incisor inclination changes affecting patients' soft tissue profiles. Here, we aim to determine the correlation, in non-extraction Class I malocclusion cases, between the upper and lower incisor inclination changes toward the nasolabial angle and the mentolabial angle before and after orthodontic treatment. (We took before and after lateral cephalometric radiographs on 26 patients with non-extraction Class I malocclusion orthodontic treatment.) We measured the I-SN, IMP, nasolabial, and mentolabial angles. For statistical analysis, we used the non-parametric Wilcoxon test and the Spearmen correlation test. There was no significant difference between the I-SN and nasolabial angles, but a significant difference between the IMP and mentolabial angles, before and after treatment. The correlation test showed very weak negative and positive correlations between the change in the I-SN angle and the change in the nasolabial angle, and the change in the IMP angle and the change in the mentolabial angle, respectively. The decrease in the I-SN angle was followed by an increase in the nasolabial angle, even though the correlation was very weak. The increase in the IMP angle was followed by an increase in the mentolabial angle, which was also very weakly correlated.
AB - Non-extraction orthodontic treatment in borderline cases is reported, according to some authors, to lead to upper and lower incisor inclination changes affecting patients' soft tissue profiles. Here, we aim to determine the correlation, in non-extraction Class I malocclusion cases, between the upper and lower incisor inclination changes toward the nasolabial angle and the mentolabial angle before and after orthodontic treatment. (We took before and after lateral cephalometric radiographs on 26 patients with non-extraction Class I malocclusion orthodontic treatment.) We measured the I-SN, IMP, nasolabial, and mentolabial angles. For statistical analysis, we used the non-parametric Wilcoxon test and the Spearmen correlation test. There was no significant difference between the I-SN and nasolabial angles, but a significant difference between the IMP and mentolabial angles, before and after treatment. The correlation test showed very weak negative and positive correlations between the change in the I-SN angle and the change in the nasolabial angle, and the change in the IMP angle and the change in the mentolabial angle, respectively. The decrease in the I-SN angle was followed by an increase in the nasolabial angle, even though the correlation was very weak. The increase in the IMP angle was followed by an increase in the mentolabial angle, which was also very weakly correlated.
UR - http://www.scopus.com/inward/record.url?scp=85054503886&partnerID=8YFLogxK
U2 - 10.1088/1742-6596/1073/6/062002
DO - 10.1088/1742-6596/1073/6/062002
M3 - Conference article
AN - SCOPUS:85054503886
SN - 1742-6588
VL - 1073
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
IS - 6
M1 - 062002
T2 - 2nd Physics and Technologies in Medicine and Dentistry Symposium, PTMDS 2018
Y2 - 18 July 2018 through 18 July 2018
ER -