Komabayashi Takashi, Zhu Qiang, Jiang Jin, Safavi Kamran E, Spångberg Larz S W
Department of Endodontics, Texas A&M Health Science Center Baylor College of Dentistry, Dallas, TX 75246, USA.
Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2009 Mar;107(3):e107-11. doi: 10.1016/j.tripleo.2008.10.021. Epub 2009 Jan 20.
Dentin moisture content is important in adhesive bonding and structural strength research; however, there is no rapid method available to assess dentin moisture without sample destruction. This study examined the use of a digital grain moisture meter to measure root dentin moisture in vitro. Extracted mandibular single-rooted teeth were sectioned at the CEJ. The moisture of the root dentin was measured at 6 measuring modes for different grains and repeated 5 times. Dentin weight changes before and after drying were measured to obtain control values. The control values were compared with machine readings. In conclusion, (1) each nondestructive measurement took less than 30 seconds, (2) 24 hours of storage at 37 degrees C and 100% humidity did not restore dentin moisture, and (3) 5 grain modes had a high validity and could be used for dentin moisture measurements.
牙本质含水量在粘结和结构强度研究中很重要;然而,目前尚无无需破坏样本就能快速评估牙本质含水量的方法。本研究检测了使用数字谷物水分测定仪在体外测量牙根牙本质含水量的情况。将拔除的下颌单根牙在牙骨质牙釉质界处进行切片。在6种针对不同谷物的测量模式下测量牙根牙本质的含水量,并重复测量5次。测量干燥前后牙本质的重量变化以获得对照值。将对照值与仪器读数进行比较。总之,(1)每次无损测量用时不到30秒,(2)在37℃和100%湿度下储存24小时并未恢复牙本质含水量,(3)5种谷物模式具有较高的有效性,可用于牙本质含水量测量。