Gunda Sachin A, Patil Anil, Varekar Aniruddha
Department of Pedodontics, Bharati Vidyapeeth Deemed University Dental College and Hospital, Sangli, Maharashtra, India.
BMJ Case Rep. 2013 Jul 4;2013:bcr2013010021. doi: 10.1136/bcr-2013-010021.
Trauma or infection to the primary tooth may have deleterious effects on the underlying developing tooth buds. Anatomically the root apices of primary teeth are in close proximity to the developing permanent tooth buds; hence spread of infection originating from pulp necrosis of primary tooth may not only affect the underlying tooth bud but may also affect the adjacent tooth buds. The extent of malformation depends on the developmental stage of tooth or the age of patient. Presented here is a rare case of complete arrest of maxillary first permanent molar root growth due to spread of periapical infection originating from second primary molar leading to failure of its eruption and finally extraction. Histopathlogical analysis revealed compound odontoma associated with maxillary first permanent molar.
乳牙受到创伤或感染可能会对其下方正在发育的牙胚产生有害影响。从解剖学角度来看，乳牙的根尖与正在发育的恒牙胚非常接近；因此，源自乳牙牙髓坏死的感染扩散不仅可能影响下方的牙胚，还可能影响相邻的牙胚。畸形的程度取决于牙齿的发育阶段或患者的年龄。本文介绍了一例罕见病例，上颌第一恒磨牙牙根生长完全停滞，原因是源自第二乳磨牙的根尖感染扩散，导致其无法萌出，最终被拔除。组织病理学分析显示，上颌第一恒磨牙伴有复合性牙瘤。
