Clinical study of orthodontic treatment of Class Ⅲmalocclusion of high angle with microscrew implant anchorage

doi:10.3877/cma.j.issn.1674-1366.2013.05.010

Abstract

Abstract:

Objective

To evaluate the treatment effects of microscrew implant anchorage on Class Ⅲ malocclusion with high angle.

Methods

Totally twenty cases of Class Ⅲ high angle malocclusions were chosen and classified into two groups. The experimental group was treated with microscrew implant anchorage combining with Class Ⅲelastics while the control group was treated with Class Ⅲelastics without microscrew implant. Lateral cephalometric radiographs of pretreatment and posttreatment were detected and statistically analyzed using student t test.

Results

There were no significant changes in the distance of U6-PP as well as the angles of U6-SN， SN-MP， FH-MP and Y axis in the experimental group compared with the control group in which the changes increased.

Conclusion

It is effective to use microscrew implant anchorage with Class Ⅲelastics to control the vertical height of mandible and prevent it from rotating clockwisely.

Key words: Microscrew implant, Class Ⅲmalocclusion, High angle

Yu PAN, Jing XU, Yang WANG, Wen-bo PENG. Clinical study of orthodontic treatment of Class Ⅲmalocclusion of high angle with microscrew implant anchorage[J]. Chinese Journal of Stomatological Research(Electronic Edition), 2013, 07(05): 390-394.

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URL: https://zhkqyxyjzz.cma-cmc.com.cn/EN/10.3877/cma.j.issn.1674-1366.2013.05.010

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Figures/Tables 5

References 9

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测量项目	矫治前	矫治后	t值	P值
SNA（°）	79.18±3.68	79.54±3.96	1.384	0.216
SNB（°）	80.96±3.89	80.52±3.24	1.951	0.135
ANB（°）	-1.77±0.84	-1.24±0.72	2.263	0.039
U1-PP（mm）	31.22±3.79	31.93±4.07	1.719	0.146
U1/SN（°）	107.65±3.91	108.89±3.72	1.451	0.185
U6-PP（mm）	23.42±1.86	23.68±1.82	2.012	0.071
U6-SN（°）	65.91±4.33	66.42±4.15	1.829	0.181
SN-MP（°）	43.52±2.52	44.10±2.86	1.916	0.097
FH-MP（°）	38.41±3.02	38.90±3.02	1.885	0.106
Y轴（°）	69.13±0.89	69.79±0.72	1.721	0.131
Ar-Go-Me（mm）	134.73±3.74	134.48±3.37	0.785	0.412
L1-MP（mm）	43.15±2.65	45.23±2.42	2.783	0.021

测量项目	矫治前	矫治后	t值	P值
SNA（°）	79.18±3.68	79.54±3.96	1.384	0.216
SNB（°）	80.96±3.89	80.52±3.24	1.951	0.135
ANB（°）	-1.77±0.84	-1.24±0.72	2.263	0.039
U1-PP（mm）	31.22±3.79	31.93±4.07	1.719	0.146
U1/SN（°）	107.65±3.91	108.89±3.72	1.451	0.185
U6-PP（mm）	23.42±1.86	23.68±1.82	2.012	0.071
U6-SN（°）	65.91±4.33	66.42±4.15	1.829	0.181
SN-MP（°）	43.52±2.52	44.10±2.86	1.916	0.097
FH-MP（°）	38.41±3.02	38.90±3.02	1.885	0.106
Y轴（°）	69.13±0.89	69.79±0.72	1.721	0.131
Ar-Go-Me（mm）	134.73±3.74	134.48±3.37	0.785	0.412
L1-MP（mm）	43.15±2.65	45.23±2.42	2.783	0.021

测量项目	矫治前	矫治后	t值	P值
SNA（°）	78.88±3.25	79.22±3.21	1.362	0.232
SNB（°）	80.87±3.36	79.63±3.46	2.230	0.042
ANB（°）	-1.75±0.84	-0.76±0.72	2.782	0.019
U1-PP（mm）	31.15±3.21	31.93±3.07	1.769	0.113
U1/SN（°）	106.35±3.32	111.69±3.63	3.169	0.011
U6-PP（mm）	23.35±1.46	25.48±1.45	2.829	0.019
U6-SN（°）	66.31±4.52	70.52±4.63	3.581	0.005
SN-MP（°）	43.18±2.44	46.69±3.15	3.012	0.015
FH-MP（°）	38.61±3.11	41.92±2.65	3.112	0.012
Y轴（°）	68.65±1.12	71.96±1.02	3.158	0.013
Ar-Go-Me（mm）	133.23±3.85	133.41±3.69	0.745	0.512
L1-MP（mm）	42.95±2.85	45.10±2.52	2.241	0.039

测量项目	矫治前	矫治后	t值	P值
SNA（°）	78.88±3.25	79.22±3.21	1.362	0.232
SNB（°）	80.87±3.36	79.63±3.46	2.230	0.042
ANB（°）	-1.75±0.84	-0.76±0.72	2.782	0.019
U1-PP（mm）	31.15±3.21	31.93±3.07	1.769	0.113
U1/SN（°）	106.35±3.32	111.69±3.63	3.169	0.011
U6-PP（mm）	23.35±1.46	25.48±1.45	2.829	0.019
U6-SN（°）	66.31±4.52	70.52±4.63	3.581	0.005
SN-MP（°）	43.18±2.44	46.69±3.15	3.012	0.015
FH-MP（°）	38.61±3.11	41.92±2.65	3.112	0.012
Y轴（°）	68.65±1.12	71.96±1.02	3.158	0.013
Ar-Go-Me（mm）	133.23±3.85	133.41±3.69	0.745	0.512
L1-MP（mm）	42.95±2.85	45.10±2.52	2.241	0.039

[1]	Sheng Zhang, Chunyang Wang, Yongjian Xie, Lixiang Mai. Treatment of open bite malocclusion with high angle using invisalign [J]. Chinese Journal of Stomatological Research(Electronic Edition), 2018, 12(05): 305-311.
[2]	Hong-fei LU, Zhi-hui MAI, Hong AI, Xiang-lin LONG. The study on the change of maxillary and maxillary sinus for malocclusion patient with front traction [J]. Chinese Journal of Stomatological Research(Electronic Edition), 2008, 02(02): 166-171.

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