快速生长期骨性安氏Ⅱ类下颌后缩患者使用无托槽隐形矫治器前导下颌的临床效果分析

doi:10.13591/j.cnki.kqyx.2023.03.010

Abstract

Abstract:

Objective To evaluate the effects of non-bracket invisible appliance mandibular advance(MA) on skeletal Class Ⅱ growing patients with mandibular retrusion. Methods Nineteen skeletal Class Ⅱ growing patients with mandibular retrusion who were treated in the department of stomatology of Changshu traditional Chinese medicine hospital from January 2018 to May 2021 were selected. They had an average age of (12.32±1.51) years old. The treatment group consisted of 10 children who were treated with MA. The control group consisted of 9 children who refused to treat their malocclusion. Cephalometrics of all patients were taken before and after the observation or treatment. The cephalometric data of two groups were analyzed. Results Compared with the control group, in the treatment gruop SNB angle, L1-NB angle, L1-NB distance, L6-MP distance, Z angle increased significantly (P<0.05);Co-Go distance, Co-Gn distance, SL increased more greatly than the control group; ANB angle, U1-SN angle, U1-NA angle, U1-NA distance, L1-MP distance, FCA angle decreased significantly (P<0.05); SE did not change significantly in the treatment group, but increased significantly in the control group (P<0.05). Conclusion MA can promote mandibular growth and improve lateral profile. The angle of the lower teeth and the angle of the mandible plane can be controlled by MA appliance.

Key words: mandibular retrusion, mandibular advancement, skeletal Class Ⅱ malocclusion, mandibular advance

CLC Number:

R783.5

CAO Weiqing, LIN Tangyi, LYU Dong. Research on clinical effects of non-bracket invisible appliance on the mandibular advancement treatment of skeletal Class Ⅱ growing patients with mandibular retrusion[J]. Stomatology, 2023, 43(3): 242-247.

Figures/Tables 4

Tab.1

Cephalometric analysis of two groups before and after treatment x ˉ±s"

测量指标	治疗组				对照组				两组差值对比
测量指标	术前	术后	差值	P	前	后	差值	P	P
SNA/(°)	80.60±2.95	80.68±3.03	0.08±0.74	0.74	80.00±2.49	80.12±2.55	0.12±0.46	0.39	0.89
SNB/(°)	74.58±2.97	76.88±2.58	2.30±0.99	0.00	74.07±2.60	74.30±2.62	0.23±0.71	0.29	0.00
ANB/(°)	6.13±1.24	3.80±0.79	-2.12±0.90	0.00	5.93±1.25	5.75±1.11	-0.18±0.87	0.48	0.00
SN-MP/(°)	32.06±5.12	31.76±5.03	-0.31±0.78	0.27	32.47±3.26	32.74±3.09	0.28±0.94	0.53	0.20
U1-SN/(°)	106.69±7.01	103.87±5.86	-2.82±1.92	0.00	108.50±6.13	108.39+6.11	-0.26+0.87	0.32	0.00
U1-NA/(°)	25.40±6.69	22.75±6.12	-2.65±2.10	0.00	27.92±6.10	28.18±5.76	0.26±1.15	0.45	0.00
U1-NA距/mm	6.08±1.58	4.81±1.70	-1.27±1.19	0.01	6.31±2.62	6.23±2.68	-0.08±0.33	0.44	0.00
U1-PP距/mm	27.53+1.46	27.66+1.53	0.13+0.53	0.48	27.17±2.58	26.95±2.33	-0.22±0.48	0.13	0.12
U6-PP距/mm	19.49±1.78	19.77±1.41	0.28±0.61	0.21	19.87±1.57	20.06±1.76	0.18±0.67	0.36	0.75
L1-NB/(°)	25.12±7.16	28.21±7.27	3.09±2.28	0.00	23.89±3.92	24.28±3.99	0.39±0.79	0.12	0.00
L1-NB距/mm	5.02±1.15	6.59±1.57	1.57±1.16	0.00	5.80±1.27	5.94±1.02	0.14±0.73	0.53	0.00
L1-MP/(°)	98.59±5.79	99.47±6.20	0.88±1.84	0.19	97.39±4.67	97.41±4.52	-0.02±0.67	0.93	0.15
L1-MP距/mm	37.00±2.35	36.31±2.06	-0.69±0.56	0.00	37.25±3.35	37.46±3.34	0.20±0.67	0.31	0.00
L6-MP距/mm	29.31±1.20	30.15±1.49	0.85±0.45	0.00	29.58±1.77	29.80±1.70	0.22±0.46	0.12	0.00
Co-Gn/mm	102.71±6.62	108.23±7.31	5.52±1.68	0.00	101.08±4.66	103.60±4.57	2.52±0.56	0.00	0.00
Co-Go/mm	49.84±3.85	53.01±3.73	3.08±0.65	0.00	50.15±3.78	51.86±3.66	1.71±0.54	0.00	0.00
Go-Gn/mm	68.02±2.78	70.95±2.03	2.93±0.91	0.00	66.46±2.65	68.98±2.56	2.51±0.69	0.00	0.15
SL/mm	40.30±5.08	43.01±5.50	2.71±0.65	0.00	39.40±3.84	41.10±3.94	1.70±0.66	0.00	0.00
SE/mm	19.63±1.91	19.92±1.69	0.29±0.47	0.10	19.03±1.81	19.87±1.81	0.85±0.54	0.00	0.03
FCA/(°)	16.06±3.07	9.57±3.07	-6.49±1.64	0.00	15.99±3.48	16.11±3.38	0.12±0.93	0.44	0.00
Z角/(°)	60.22±8.24	64.67±8.23	4.78±2.85	0.00	62.01±7.32	62.39±7.41	0.38±1.00	0.21	0.00

Tab.1

Fig.1

Fig.2

Fig.3

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Research on clinical effects of non-bracket invisible appliance on the mandibular advancement treatment of skeletal Class Ⅱ growing patients with mandibular retrusion

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[2]	. An association study:occlusal plane and different sagittal relationships of maxillary and mandible in female skeletal Class Ⅱ hyperdivergent malocclusion [J]. , 2015, 35(5): 379-382.
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