tailieunhanh - báo cáo khoa học: " Non-syndromic occurrence of true generalized microdontia with mandibular mesiodens - a rare case"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Non-syndromic occurrence of true generalized microdontia with mandibular mesiodens - a rare case | Bargale and Kiran Head Face Medicine 2011 7 19 http content 7 1 19 HEAD FACE MEDICINE CASE REPORT Open Access Non-syndromic occurrence of true generalized microdontia with mandibular mesiodens - a rare case Seema D Bargale and Shital DP Kiran Abstract Abnormalities in size of teeth and number of teeth are occasionally recorded in clinical cases. True generalized microdontia is rare case in which all the teeth are smaller than normal. Mesiodens is commonly located in maxilary central incisor region and uncommon in the mandible. In the present case a 12 year-old boy was healthy normal in appearance and the medical history was noncontributory. The patient was examined and found to have permanent teeth that were smaller than those of the average adult teeth. The true generalized microdontia was accompanied by mandibular mesiodens. This is a unique case report of non-syndromic association of mandibular hyperdontia with true generalized microdontia. Keywords Generalised microdontia Hyperdontia Permanent dentition Mandibular supernumerary tooth Introduction Microdontia is a rare phenomenon. The term microdontia microdentism microdontism is defined as the condition of having abnormally small teeth 1 . According to Boyle in general microdontia the teeth are small the crowns short and normal contact areas between the teeth are frequently missing 2 Shafer Hine and Levy 3 divided microdontia into three types 1 Microdontia involving only a single tooth 2 relative generalized microdontia due to relatively small teeth in large jaws and 3 true generalized microdontia in which all the teeth are smaller than normal. According to these authors aside from its occurrence in some cases of pituitary dwarfism true generalized microdontia is exceedingly rare. Microdontia of a single tooth can be further classified into 1 microdontia of the whole tooth 2 microdontia of the crown of the tooth and 3 microdontia of the root alone 4 . Involvement of the entire dentition is