CAJ | 학술논문

目的：研究频域型光相干成像( fourier domain optical coherence tomography, FD OCT)系统对猪上、下颌骨缺损探查深度的差异。方法从10对猪同侧上下颌骨第二磨牙区颊侧截取20块骨块,将骨块内侧面打磨成水平面,外侧面保持完整。用锥形车针在内侧面上制备出楔形沟槽,槽内充填肉末模拟骨缺损。频域OCT从骨块外侧面,沿沟槽最深处向最浅处扫描。当沟槽底部在OCT影像上刚刚消失时,在骨块外侧面上标记此位点,并记录该位点到槽底之间的骨厚度(即OCT测量值)记为Ls。再用显微CT扫描骨块,测量标记位点到槽底之间骨厚度并记录为Lr。结果频域OCT在猪上、下颌骨骨下缺损探查的平均深度分别为0.86mm和0.78mm,对应OCT测量值分别为1.19mm和1.09mm,两者间均无显著性差异(P>0.05)。结论在本研究条件下,频域OCT对猪上、下颌骨缺损的探查深度无显著性差异。
목적：연구빈역형광상간성상( fourier domain optical coherence tomography, FD OCT)계통대저상、하합골결손탐사심도적차이。방법종10대저동측상하합골제이마아구협측절취20괴골괴,장골괴내측면타마성수평면,외측면보지완정。용추형차침재내측면상제비출설형구조,조내충전육말모의골결손。빈역OCT종골괴외측면,연구조최심처향최천처소묘。당구조저부재OCT영상상강강소실시,재골괴외측면상표기차위점,병기록해위점도조저지간적골후도(즉OCT측량치)기위Ls。재용현미CT소묘골괴,측량표기위점도조저지간골후도병기록위Lr。결과빈역OCT재저상、하합골골하결손탐사적평균심도분별위0.86mm화0.78mm,대응OCT측량치분별위1.19mm화1.09mm,량자간균무현저성차이(P>0.05)。결론재본연구조건하,빈역OCT대저상、하합골결손적탐사심도무현저성차이。
Objective To investigate the difference in detection of porcine maxilla and mandible defect depth by fourier domain optical coherence tomography( FDOCT) . Methods Twenty pieces of bone plate were obtained from ten pair of porcine maxillae and mandibles on the same side. The internal bone surface was ground to be flat, and the external surface was maintained intact. A round bur was used to create a deep groove on the internal surface. Then, each groove was filled with fresh meat to simulate the bone lesion. FDOCT was used to scan the external bone surface along the groove from the deepest site to the shallowest site. When the bottom of the groove just disappeared on the OCT images, the corresponding site on the external bone surface was marked, and the bone OCT thickness under the groove was calculated as Ls. After that, all bone plates were scanned by micro-computed tomography ( MCT) , and the real bone thickness between the marked site and the bottom of the groove was calculated as Lr. The difference of Ls and Lr between the maxilla and mandible was statistically analyzed. Results The mean values of Ls and Lr were 1. 19mm and 0. 86mm in the maxilla, and 1. 09mm and 0. 78mm in the mandible, respectively. There was no significant difference in detection of the defect depth between porcine maxilla and mandible by FDOCT ( P >0. 05 ) . Conclusion Under the limitation of the present study, FDOCT may provide equal ability in detecting the depth of bone loss in porcine maxilla and mandible.