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- W2387136152 abstract "Objective To evaluate the feasibility of application of panoramic radiography in early prediction of impacted mandibular third molars.Methods Eighty six cases of one hundred and sixty six mandibular third molars that meet the criteria of this study are selected and divided into two groups: the impaction group and the eruption group based on diagnostic standards.The following measurements are made: ① the inclination of mandibular second molars(A m2-m1);② the inclination of mandibular third molars(Am3-m2);③ the inclination degree of mandibular third molars(Am3-mp);④ the gonial angle(GoA);⑤ the crystal marginal angle(RP-OP) ⑥ the crowding degree of molars(CM);⑦ retromolar space and mesiodistal crown space ratios(SM/MD);⑧ retromolar space and the length of mandibular alveolar ratios(SM/AD).The independent samples t test is conducted to analyze the differences between the eruption group and the impaction group.Then,logistic regression analysis of relevant factors are made under the condition that the incidence of impacted mandibular third molars and changes in eight test items stated hereinbefore are taken as the dependent variable and the independent variable respectively.Results There are significant differences between the two groups with regard to changes of Am3-m2,CM,A m2-m1,Am3-mp,SM / MD and SM / AD(P0.01).Conversely,there was no significant correlation between the GoA of impaction group and eruption group(P0.05).Regression equation acquired from logistic regression analysis is that occurrence of M3 impaction = 8.51 +5.48 ×Am3-m2 +2.93 ×CM-1.40 ×Am3-mp-1.04 ×A m2-m1.Conclusion Different eruption status of mandibular third molars is manifested in panoramic radiographs,which can be used to make an early prediction of impacted mandibular third molars to a certain extent." @default.
- W2387136152 created "2016-06-24" @default.
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- W2387136152 date "2013-01-01" @default.
- W2387136152 modified "2023-09-24" @default.
- W2387136152 title "Feasibility of Application of Panoramic Radiography in Early Prediction of Impacted Mandibular Third Molars" @default.
- W2387136152 hasPublicationYear "2013" @default.
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