下颌近中阻生智齿拔除术对邻牙邻面接触强度的影响

doi:10.13591/j.cnki.kqyx.2024.12.006

Abstract

Abstract:

Objective To explore the influence of extracting different types of mandibular mesially impacted third molars on the proximal contact strength(PCS) of adjacent teeth. Methods One hundred and ten cases of mandibular mesially impacted third molars were divided into high impacted group(40 cases), middle impacted group(40 cases) and low impacted group(30 cases). The PCS of the adjacent teeth of impacted teeth(between the mandibular second premolar L5 and the mandibular first molar L6, and between the mandibular first molar L6 and the mandibular second molar L7) were measured by high-precision dynamometer before and after operation, and the mean and standard deviation were statistically measured. The differences of PCS before and after extraction in each group were analyzed. Results Without considering the classification of mesial impacted teeth, extraction of mandibular third molars led to the decrease in PCS of L5/L6 and L6/L7. In the high-middle impacted groups, the extraction of mandibular third molars led to the decrease in PCS of L5/L6 and L6/L7, while in the low impacted group, there was no statistical difference between the changes in PCS of L5/L6 and L6/L7. Conclusion The extraction of high-middle mandibular mesially impacted third molars can significantly reduce the adjacent teeth’s PCS, but the extraction of low mandibular mesially impacted third molars has no significant effect on the adjacent teeth’s PCS.

Key words: third molar, mesial impaction, proximal contact strength

CLC Number:

R782.11

XU Shi, LU Zhanyi, MIAO Leiying. Effect of extraction of mandibular mesially impacted wisdom teeth on the proximal contact strength[J]. Stomatology, 2024, 44(12): 912-916.

Figures/Tables 5

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References 26

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牙位	例数	术前/N	术后/N	差值/N	t	P
L5/L6	110	3.07±1.27	2.84±1.10	0.23±0.95	2.53	0.013
L6/L7	110	3.09±1.43	2.82±1.24	0.27±1.00	2.87	0.005

分类	牙位	例数	术前	术后	差值	t	P
近中高位	L5/L6	40	3.03±1.31	2.73±1.19	0.30±0.92	2.09	0.043
近中中位	L5/L6	40	3.07±1.27	2.79±0.95	0.28±0.83	2.12	0.041
近中低位	L5/L6	30	3.11±1.25	3.05±1.17	0.06±1.14	0.31	0.759
近中高位	L6/L7	40	2.85±1.40	2.41±1.21	0.44±1.02	2.74	0.009
近中中位	L6/L7	40	3.41±1.53	2.96±1.33	0.45±0.91	3.11	0.004
近中低位	L6/L7	30	2.99±1.28	3.18±0.99	-0.19±0.98	1.02	0.316

Effect of extraction of mandibular mesially impacted wisdom teeth on the proximal contact strength

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