基本解釋[醫(yī)藥科學(xué)]上頜第一恒磨牙英漢例句雙語(yǔ)例句Objective To study the shape and location of root canal orifice in maxillary first permanent molar and provide a morphological basis for locating canal orifice in endodontic therapy.目的研究上頜第一磨牙根管口形態(tài)和位置關(guān)系，為根管治療時(shí)尋找根管口提供解剖學(xué)依據(jù)。maxillary first permanent molar更多例句專業(yè)釋義醫(yī)藥科學(xué)上頜第一恒磨牙