不同投照角度X线根尖片诊断下颌前牙、前磨牙多根管的临床评价
불동투조각도X선근첨편진단하합전아、전마아다근관적림상평개
Clinical evaluation of the effect of angulation apical X-rays and the X-rays with file in diagnosing multiple canals in mandibular anterior teeth and premolars
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