微型骨钉辅助上颌快速扩弓对下颌位置的影响

doi:10.13591/j.cnki.kqyx.2023.02.008

Abstract

Abstract:

Objective To explore the effect of miniscrew-assisted rapid palatal expansion (MARPE) on mandible position in the treatment of adult skeletal Class Ⅰ malocclusion with maxillary transverse deficiency. Methods In this retrospective study, 20 cases of adult skeletal Class Ⅰ malocclusion with maxillary transverse deficiency treated with MARPE in our hospital from July 2019 to March 2022 were selected as research objects. CBCT data of three time points before treatment (T0), immediately after expansion (T1) and six months after retention (T2) were collected. The head position was standardized and calibrated by Dolphin software, and then mandible landmarks (left and right Condylion, left and right Gonion, Menton) were positioned. The linear distance changes of each landmark relative to the reference plane of coronal plane, axial plane and sagittal plane were measured, which represented the sagittal, vertical and horizontal displacement of mandible respectively. Repeated measurement ANOVA and LSD multiple comparison were used to evaluate the position change of each landmark. Results The Menton and right Gonion rotated clockwise at T1, and relapsed to the initial position at T2. No lateral displacement of Menton was found. Conclusion When MARPE is used to treat skeletal Class Ⅰ malocclusion with maxillary transverse deficiency, it causes a transient clockwise rotation of the mandiblar. The mandible does not show sagittal, vertical and horizontal position changes in long-term evaluation.

Key words: miniscrew-assisted rapid palatal expansion, maxillary transverse deficiency, mandibular position, cone beam computed tomography

CLC Number:

R783.5

LEI Qiaoling,HE Wendan,LEI Qiyin,XIONG Peiying,WANG Zhongdong. Effect of miniscrew-assisted rapid palatal expansion on mandibular position[J]. Stomatology, 2023, 43(2): 135-140.

Figures/Tables 5

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References 25

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测量项目	T0	T1	T2	P
rCo-CoP	8.32±3.12	8.46±3.71	8.14±2.38	0.60
lCo-CoP	8.65±3.52	8.92±4.23	8.18±3.34	0.13
rGo-CoP	18.51±4.31	17.61±3.98	18.56±4.70	0.04^*
lGo-CoP	20.35±4.03	19.16±3.20	20.01±3.22	0.06
Me-CoP	78.32±8.29	76.67±7.09	78.06±7.86	0.02^*
rCo-AxP	2.92±2.11	3.15±1.80	3.03±2.23	0.37
lCo-AxP	2.37±1.71	2.61±1.41	2.33±1.63	0.20
rGo-AxP	50.70±3.92	51.55±3.44	50.90±3.67	0.00^**
lGo-AxP	51.15±4.08	51.81±3.91	51.32±4.40	0.09
Me-AxP	77.57±5.55	79.03±6.00	78.10±4.54	0.00^**
Me-SaP	2.65±1.81	2.42±1.83	2.78±2.13	0.71

测量项目	时间	线距变化	P
rGo-CoP	T0-T1	0.90±0.41	0.04^*
	T1-T2	-0.95±0.49	0.07
	T0-T2	-0.05±0.30	0.88
rGo-AxP	T0-T1	-0.86±0.23	0.00^**
	T1-T2	0.66±0.28	0.03^*
	T0-T2	-0.20±0.19	0.30
Me-CoP	T0-T1	1.65±0.66	0.02^*
	T1-T2	-1.39±0.64	0.04^*
	T0-T2	0.26±0.37	0.49
Me-AxP	T0-T1	-1.46±0.15	0.00^**
	T1-T2	0.94±0.42	0.04^*
	T0-T2	-0.52±0.34	0.15

Effect of miniscrew-assisted rapid palatal expansion on mandibular position

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