Cariology and Operative Dentistry, Department of Restorative Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.
Dent Mater J. 2012;31(4):533-40. doi: 10.4012/dmj.2011-228.
To indicate the possibility of a new approach to creating mineral density profiles, and to examine longitudinal changes in 'the rate of remineralization (RA)' and 'the mineral density (DAs) at 4 different depths' (surface zone: SZ, lesion body: LB, middle zone: MZ, deep zone near to sound area: DZ) in enamel subsurface lesions, eight demineralized bovine enamel-dentin blocks were remineralized for 1 to 4 week and investigated using Micro-focus X-ray CT (micro-CT). After CT scanning, mineral density profiles were created.Mineral densities at each depth after demineralization were SZ is approximately equal to LB<MZ<DZ. Increase in RA was the greatest in the first week of remineralization and it decreased over time. Increments of the mineral density were greater in the order of SZ is approximately equal to LB>MZ>DZ. This study indicated a new approach to create a mineral density profile and suggested the greater the value of the mineral density before the remineralization, the smaller the mineral density increments.
为了探索一种新的方法来创建矿物质密度剖面，并研究釉质表面下病变中“再矿化速率（RA）”和“四个不同深度的矿物质密度（DAs）”的纵向变化，我们用微焦点 X 射线 CT（micro-CT）对 8 个脱矿牛牙釉质 - 牙本质块进行了 1 至 4 周的再矿化处理并进行了研究。在 CT 扫描后，创建了矿物质密度剖面。脱矿后每个深度的矿物质密度为 SZ 约等于 LB<MZ<DZ。再矿化的第一周 RA 增加最大，然后随时间减少。矿物质密度的增量按 SZ 约等于 LB>MZ>DZ 的顺序增加。本研究表明了一种创建矿物质密度剖面的新方法，并提示再矿化前矿物质密度越高，矿物质密度的增量越小。
