Kosinski R W, Chaiyawat Y, Rosenberg L
Division of Dental Medicine, Schneider Children's Hospital New Hyde Park, New York, USA.
Pediatr Dent. 1999 May-Jun;21(3):213-5.
Dentinal dysplasia type I (DDI) is a rare disturbance in dentin formation. This case report illustrates different radiographic features from other reported DDI cases in that only one quadrant (lower right posterior teeth) has the characteristic of DDI and both right and left upper molars exhibit taurodontism. This finding might be a variation of DDI. However, it is possible that this type of developmental defect could occur because of regionalized abnormalities in cellular function and proliferation as occurs in regional odontodysplasia.
I型牙本质发育异常（DDI）是一种罕见的牙本质形成紊乱疾病。本病例报告展示了与其他已报道的DDI病例不同的影像学特征，即只有一个象限（右下后牙）具有DDI的特征，且左右上颌磨牙均表现为牛牙样牙。这一发现可能是DDI的一种变异形式。然而，这种类型的发育缺陷也有可能是由于细胞功能和增殖的局部异常导致的，就像局部牙发育异常那样。
