辐射剂量对CBCT测量上颌牙龈厚度的影响

Khateeb Hiba, Machtei Eli E, Horwitz Jacob
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引用次数: 0

摘要

目的:1。直接测量牙龈厚度(GT)和使用不同暴露时间的CBCT测量牙龈厚度(GT),并进行比较。2. 比较每个CBCT系统中不同暴露时间的硬组织测量值。该研究的假设是,当减少暴露时间时,CBCT GT测量的准确性会受到损害。方法:在两种CBCT扫描系统(SysA和SysB)中,各使用8只新鲜猪上颌骨。将8根一次性牙科针插入每个颌骨的牙龈组织,直到与底层骨骼产生阻力。在每根针进入软组织的入口点上,用永久性记号笔做了一个记号。下颌扫描两次,使用低(RadL)和高(RadH)曝光时间。将针头挤出,并用电子卡尺测量针头穿透部分的长度,单位为mm (Cli)。在两个软件系统(R和I)中,在针的三维位置(Rad)的轴向上产生的横截面图像上测量放射学GT。进行描述性统计、t检验和方差分析。显著性设为5%。结果:软件I mean Cli为2.22mm±0.54mm, RadL和RadH分别为2.34mm±0.47mm和2.34mm±0.52mm。软件R RadL和RadH分别为2.16mm±0.50mm和2.23mm±0.49mm。两两比较,软硬组织RadL和RadH均无统计学差异。临床和影像学测量的牙龈厚度之间有很好的相关性,高剂量和低剂量之间基本上没有显著差异。结论:在不影响影像学牙龈厚度测量精度的情况下,减少CBCT辐射是可能的,从而为CBCT在牙科的广泛应用开辟了道路。临床意义:降低辐射剂量可以使CBCT在牙科中得到更广泛的应用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The effect of radiation dose on CBCT measurements of maxillary gingival thickness
Purposes: 1. to measure Gingival Thickness (GT) both directly and with CBCT using various exposure times, and compare them. 2. to compare hard tissue measurements between different exposure times within each CBCT system. The study hypothesis was that accuracy of CBCT GT measurement is impaired when reducing exposure time. Methods: 8 fresh pig maxillae were utilized for each of two CBCT scan systems (SysA and SysB). Eight disposable dental needles were inserted into the gingival tissue of each jaw until reaching resistance from the underlying bone. A mark on each needle at its entrance point into the soft tissue was created using a permanent marker. Jaws were scanned twice, using low (RadL) and high (RadH) exposure times. The needles were extruded, and an electronic caliper was used to measure the length of the penetrated portion of the needle in mm (Cli). Radiographic GT was measured on cross sectional images, produced in the axial direcion of the 3D location of the needles (Rad) in two software systems (R and I). Descriptive statistics, t-test and ANOVA were performed. Significance was set at 5%. Results: Software I mean Cli was 2.22mm ± 0.54mm, RadL and RadH were 2.34mm ± 0.47mm and 2.34mm ± 0.52mm. Software R RadL and RadH were 2.16mm ± 0.50mm and 2.23mm ± 0.49mm, respectively. Using pairwise comparisons, both soft and hard tissue RadL and RadH were not statistically different. There was a good correlation between clinical and radiographic measurements of gingival thickness and essentially no significant difference between higher and lower radiation doses. Conclusions: Reducing CBCT radiation may be possible without affecting accuracy of radiographic gingival thickness measurements , thus opening the way to a wider utilization of CBCT in dentistry. Clinical relevance: Reducing radiation dose may enable a wider utilization of CBCT in dentistry.
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