机用PathfileTM联合手用ProTaper镍钛器械预备磨牙狭窄根管125例效果评价
궤용PathfileTM연합수용ProTaper얼태기계예비마아협착근관125례효과평개
Evaluation of the effect of PathfileTM for machine combined with ProTaper for hand nickel-titanium instrument in preparing molar narrow root canal in 125 cases
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