Bodner L, Bar-Ziv J
Department of Oral and Maxillofacial Surgery, Soroka Medical Centre, Ben-Gurion University of the Negev, Beer-Sheva, Israel.
Dentomaxillofac Radiol. 1998 May;27(3):166-71. doi: 10.1038/sj/dmfr/4600344.
To assess bone regeneration following marsupialization of jaw cysts.
CT with multiplanar reconstruction (MPR) was performed on 23 patients with cysts of the jaws pre-operatively and 3-4 months after marsupialization. The two images were compared for the three-dimensional outline of the cyst, the distance between the cyst and adjacent structures (vital teeth, maxillary sinus, nasal cavity and mandibular canal) and the integrity of the cortex and mandibular canal. The characteristics of the new bone formation were also determined.
The outline of the cyst was changed and partially reduced. The distance between cyst wall and adjacent structures was increased. There was remodelling of the cortex and mandibular canal. The new bone formed in the periphery of the cyst showed either a ground glass appearance or radial bone spicules.
CT with MPR is useful for evaluation of morphological changes and bone formation following marsupialization of jaw cysts. CT with MPR is the technique of choice for the maxilla and the entire body of the mandible and coronal CT for cysts in mandibular angle and ascending ramus. Cysts can be enucleated safely as early as 3 months after marsupialization.
评估颌骨囊肿开窗术后的骨再生情况。
对23例颌骨囊肿患者在术前及开窗术后3 - 4个月进行多平面重建（MPR）CT检查。比较这两组图像，观察囊肿的三维轮廓、囊肿与相邻结构（恒牙、上颌窦、鼻腔及下颌管）之间的距离以及皮质骨和下颌管的完整性。同时确定新骨形成的特征。
囊肿轮廓发生改变且部分缩小。囊肿壁与相邻结构之间的距离增加。皮质骨和下颌管出现重塑。囊肿周边形成的新骨表现为磨玻璃样外观或放射状骨小梁。
MPR CT有助于评估颌骨囊肿开窗术后的形态学变化和骨形成情况。对于上颌骨及整个下颌骨体部，MPR CT是首选技术；对于下颌角和升支的囊肿，冠状位CT更为适用。囊肿在开窗术后3个月即可安全地摘除。
