下顎臼歯部に発生した良性セメント芽細胞腫の１例　症例報告および本邦における６３例の文献的考察

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  • Benign cementoblastoma of the mandibular molar region. Case report and review of 63 cases reported in Japan.
  • Case report and review of 63 cases reported in Japan
  • 症例報告および本邦における63例の文献的考察

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Cementornas were classified for the W. H. O. by Pindborg and Kramer into distinct subgroups; cementifying fibroma, peripheral cemental clysplasia, gigantiform ceinentoma, and the benign cementoblastoma which is characterized histologically by the formation of sheets of cementum-like tissue and the active growth of cell-rich unmineralizecl tissue at the periphery mass.<BR>We experienced a case of benign cenientoblastoma with the lesion at the 6 root in a 36 year old female. It was treated by enucleation, and no recurrence occurred during follow-up intervals of 3.5 years.<BR>Clinico-statistical observation of 63 cases reported in Japan was made and the results obtained were as follows;<BR>1) Age and Sex: The average age was 18.8 years (males; 16.8 yrs., females; 23.4 yrs.). 55 cases (87.3%) were younger than 30 years. 37 cases (58.7%) occurred in males, and 26 cases (41.3%) in females.<BR>2) Localization: 79.4% of tumors were located within the mandible (20.6% in maxilla) and almost half the lesions (50.8%) were associated with the first mandibular molar.<BR>3) Chief complaint: Swelling occurred in 20 cases (35.7%), pain in 6 cases (10.5%), and both in 21 cases (36.8%).<BR>4) Size: 58.0% were between 2.0cm and 3.0cm, 28.0% over 3.0cm, and 14.0% between 1.0cm and 2.0cm.<BR>5) Recurrence: Recurrence occurred in only 4 cases (7.8%).

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