CBCT评价526颗上颌第二磨牙牙根根管形态及其与上颌窦的关系

doi:10.13591/j.cnki.kqyx.2024.11.005

Abstract

Abstract:

Objective To study anatomical structures of the maxillary second molars (MSM) roots and canals and the relationship between root apices and the maxillary sinus. Methods Cone beam computed tomography imaging data of 526 MSM from 263 patients were evaluated retrospectively. The patient age, number of roots and canals, number of fused roots, type of root canal curvature, and anatomical relationship to the sinus floor were all documented and analyzed. Results It was found that the majority of MSM had three roots (59.1%), and the incidence of three root canals with three roots was the highest (47.3%). Fused roots were found in 192 (36.5%) of the teeth examined. Palatal root canals of two-root, two-canal, and three-root, three-canal teeth had more curvature in the buccolingual direction than in the mesiodistal direction. The mesial buccal roots of MSM with three roots tended to extend into the maxillary sinus and the palatine roots of the three-rooted MSM tended to separate from the maxillary sinus. The distance between MSM and the sinus floor increased with age(P<0.05). Conclusion The root and canal shape of MSM varies widely among a sample of individuals.

Key words: cone beam computed tomography, fused teeth, root canal curvature, maxillary second molars, maxillary sinus

CLC Number:

R816.98

ZHANG Wenjuan, BAI Xijing, RAO Xiaoxiao, WANG Wei, NI Na. Evaluation of root and root canal morphology of 526 maxillary second molars and anatomical relationship with the sinus floor using CBCT[J]. Stomatology, 2024, 44(11): 824-830.

Figures/Tables 8

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References 34

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牙根数	根管类型	15~岁	25~岁	35~岁	45~岁	55~岁	合计
1个根	1R1C	3(0.6)	5(0.9)	1(0.2)	2(0.4)	0	11(2.1)
	1R2C	2(0.4)	9(1.7)	4(0.8)	6(1.1)	1(0.2)	22(4.2)
	1R3C	1(0.2)	29(5.5)	11(2.1)	6(1.1)	2(0.4)	49(9.3)
	1R4C	0	2(0.4)	0	0	0	2(0.4)
2个根	2R2C	2(0.4)	5(0.9)	2(0.4)	1(0.2)	0	10(1.9)
	2R3C	14(2.7)	54(10.2)	28(5.3)	10(1.9)	3(0.6)	109(20.7)
	2R4C	0	6(1.1)	3(0.6)	0	0	9(1.7)
3个根	3R3C	47(8.9)	99(18.8)	60(11.4)	31(5.9)	12(2.3)	249(47.3)
3个根	3R4C	11(2.1)	27(5.1)	16(3.1)	8(1.5)	0	62(11.8)
4个根	4R3C	0	0	1(0.2)	0	0	1(0.2)
4个根	4R4C	0	1(0.2)	0	1(0.2)	0	2(0.4)
合计		80(15.2)	237(45.1)	126(24.0)	65(12.4)	18(3.3)	526(100.0)

根管		颊舌方向			近远中方向			P
根管		Ⅰ型	Ⅱ型	Ⅲ型	Ⅰ型	Ⅱ型	Ⅲ型	P
1R1C		5(55.6)	2(22.2)	2(22.2)	7(70.0)	1(10.0)	2(20.0)	0.820
2R2C	B(M)	8(80.0)	1(10.0)	1(10.0)	7(70.0)	1(10.0)	2(20.0)	1.000
	P(D)	2(20.0)	6(60.0)	2(20.0)	8(80.0)	2(20.0)	0(0.0)	0.033^*
3R3C	MB	-	-	-	1(0.4)	22(8.9)	225(90.7)	-
	DB	174(71.6)	48(19.8)	21(8.6)	76(30.9)	127(51.6)	43(17.5)	0.000^*
	P	99(39.8)	97(38.9)	53(21.3)	205(82.7)	32(12.9)	11(4.4)	0.000^*

牙根数	牙根位置	牙根的数目与出现频率(n(%))			合计	牙根到上颌窦底距离
牙根数	牙根位置	IS型	CO型	OS型	合计	平均值/mm	最小值至最大值/mm
1个根		26(2.0)	38(2.9)	16(1.2)	80(6.1)	-0.9±2.6	-8.0~3.9
2个根	B(M)	24(1.9)	28(2.2)	27(2.1)	79(6.2)	0.0±2.5	-6.6~8.0
	P(D)	12(0.9)	26(2.0)	42(3.2)	80(6.1)	-0.9±2.3	-4.9~6.4
3个根	MB	130(10.0)	127(9.8)	96(7.4)	353(27.2)	-0.6±2.6	-7.8~10.5
	DB	89(6.9)	136(10.5)	127(9.8)	352(27.2)	-0.4±2.4	-5.2~10.6
	P	69(5.3)	119(9.2)	165(12.7)	353(27.2)	-0.8±2.8	-6.4~10.6
合计		350(27.0)	474 (36.6)	473 (36.4)	1 297(100)	-0.2±2.6	-8.0~10.6

年龄组/岁	牙根数	牙根到上颌窦底距离/mm	P
15~	206	-0.9±2.2^a	0.000^*
25~	570	-0.2±2.4^a,b
35~	317	0.7±2.9^b,c
45~	160	1.1±2.4^c
55~	43	2.6±2.6^d

作者(年份)	样本量 (n)	地区	研究方法	1个根管/%	2个根管/%	3个根管/%	4个根管/%	5个根管/%
Olczak等(2017)^[19]	207	波兰	CBCT	1.0	3.9	70.0	23.2	-
李建华(2017)^[5]	607	中国山东	CBCT	2.31	7.41	72.32	17.96	-
Kim等(2012)^[7]	775	韩国	CBCT	3.9	8.1	56.9	30.8	0.3
Tian等(2016)^[15]	1539	中国上海	CBCT	3.2	6.1	66.4	22.9	1.4
Xia等(2020)^[22]	400	中国重庆	CBCT	1.25	11.25	61.75	25.75	-
Felsypremila等(2015)^[23]	371	印度	CBCT	2.4	7.3	38.8	50.4	0.5
Ahmed Mostafa Ghobashy等(2017)^[24]	610	埃及	CBCT	1.64	10.66	36.89	50.82	-
Mirza等(2022)^[17]	668	沙特阿拉伯	CBCT	0.6	1.5	53.3	44.3	0.3
Silva等(2014)^[25]	306	巴西	CBCT	1.96	7.84	55.88	34.31	-

Evaluation of root and root canal morphology of 526 maxillary second molars and anatomical relationship with the sinus floor using CBCT

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