下颌第一前磨牙的形态特征与根管系统解剖的相关性分析

doi:10.13591/j.cnki.kqyx.2023.07.008

Abstract

Abstract:

Objective To study the correlation between morphological features and the anatomy of the root canal of the first mandibular premolars in dental panoramic tomograms (DPTs) in order to provide reference for clinical diagnosis and treatment. Methods DPTs and cone-beam CT (CBCT) of implant patients were selected and a total of 532 samples from 266 patients were included. CBCT was used to identify the number and morphology of root canals according to Vertucci classification, and type Ⅰ was recorded as a single canal, and the rest was a complex root canal. The length on DPTs was measured to obtain the ratio. And then the correlation of morphological features with root canal anatomy was analyzed. Results There were significant differences between single and complex root canals in gender, the ratio of 1/2 horizontal mesiodistal diameter in the root to maximum mesiodistal diameter, the sudden disappearance of root canal images and their location (P<0.05). The receiver operating characteristic (ROC) curve was generated with an AUC value of 0.851. The sensitivity for diagnosing complex canals was 0.765 and the specificity was 0.846. Conclusion Whether and where root canal images suddenly disappear, gender and the ratio of 1/2 horizontal mesiodistal diameter in the root to maximum mesiodistal diameter are of practical significance for determining the anatomical complexity of root canals.

Key words: mandibular first premolar, root canal morphology, cone-beam computer tomography, dental panoramic tomogram, tooth measurement

CLC Number:

R322.41

XU Qingqing, WANG Yumeng, LI Mengyuan, ZHANG Yuerong, XU Hai, JIANG Fei, ZHANG Guangdong. Correlation analysis of morphological features with root canal anatomy of mandibular first premolars[J]. Stomatology, 2023, 43(7): 625-632.

Figures/Tables 7

Fig.1

Fig.2

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Tab.1

Univariate analysis tables of clinical and imaging parameters associated with single and complex root canals"

变量	分类项	总计(n=532)	单根管 (n=396)	复杂根管 (n=136)	统计量	P
牙位, n(%)	左	266(50.000)	192(48.485)	74(54.412)	1.422	0.233
	右	266(50.000)	204(51.515)	62(45.588)
性别, n(%)	女	256(48.120)	200(50.505)	56(41.176)	5.182	0.023^*
	男	276(51.880)	196(49.495)	80(58.824)
年龄, n(%)	16~25	130(24.436)	92(23.232)	38(27.941)	2.262	0.688
	26~35	118(22.180)	87(21.970)	31(22.794)
	36~45	106(19.925)	79(19.949)	27(19.853)
	46~55	94(17.669)	71(17.929)	23(16.912)
	>55	84(15.789)	67(16.919)	17(12.500)
根尖影像是否变化, n(%)	否	355(66.729)	325(82.071)	30(22.059)	164.22	<0.001^*
	是	177(33.271)	71(17.929)	106(77.941)
CMDD-1/3, M(Q1, Q3)		1.644(1.494,1.819)	1.633(1.491,1.815)	1.686(1.517,1.828)	-1.454	0.146
CMDD-1/2,M(Q1, Q3)		1.438(1.333,1.564)	1.421(1.325,1.545)	1.473(1.362,1.609)	-2.841	0.005^*
CMDD-2/3, M(Q1, Q3)		1.249(1.182,1.320)	1.244(1.178,1.310)	1.286(1.186,1.354)	-2.726	0.006^*
1/2-1/3,M(Q1, Q3)		1.138(1.089,1.199)	1.139(1.093,1.201)	1.134(1.080,1.190)	1.261	0.207
2/3-1/2,M(Q1, Q3)		1.143(1.103,1.201)	1.141(1.102,1.197)	1.149(1.104,1.207)	-0.632	0.528
2/3-1/3,M(Q1, Q3)		1.307(1.234,1.394)	1.309(1.237,1.396)	1.294(1.232,1.387)	0.971	0.332
RL/CL, M(Q1, Q3)		1.764(1.563,1.945)	1.771(1.563,1.952)	1.754(1.575,1.908)	0.643	0.521
CL/MMDD, $\bar{x}±s$		1.024±0.117	1.029±0.120	1.010±0.108	1.622	0.105
1/3-MMDD,M(Q1, Q3)		0.474(0.423,0.524)	0.481(0.423,0.528)	0.464(0.423,0.513)	1.615	0.106
1/2-MMDD,M(Q1, Q3)		0.542(0.485,0.597)	0.547(0.487,0.605)	0.514(0.480,0.573)	2.700	0.007^*
2/3-MMDD, M(Q1, Q3)		0.622(0.563,0.683)	0.628(0.566,0.687)	0.605(0.561,0.660)	2.604	0.009^*
CMDD/MMDD, M(Q1, Q3)		0.781(0.729,0.830)	0.785(0.729,0.838)	0.773(0.726,0.821)	1.458	0.145
DL/RL, M(Q1, Q3)		0.264(0.148,0.372)	0.235(0.101,0.316)	0.377(0.283,0.464)	-6.036	<0.001^*
MDD/BLD, M(Q1, Q3)		0.896(0.861,0.932)	0.896(0.863,0.931)	0.895(0.860,0.939)	0.104	0.918

Tab.1

Tab.2

Fig.5

References 30

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参数	B	SE	Z	P	Odds Ratio	Lower	Upper
DL/RL	3.334	0.89	3.745	0.000^*	28.057	5.024	166.172
1/2-MMDD	-4.370	1.518	-2.878	0.004^*	0.013	0.001	0.235
根尖影像是否变化:是	2.302	0.276	8.339	0.000^*	9.998	5.888	17.425
性别:男	0.579	0.254	2.276	0.023^*	1.785	1.089	2.958
常量	0.837	1.361	0.615	0.538	2.310	0.162	34.120

Correlation analysis of morphological features with root canal anatomy of mandibular first premolars

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