Ito H, Okada T, Ishida T, Maruyama T
First Department of Prosthetic Dentistry, Faculty of Dentistry, Osaka University.
Nihon Hotetsu Shika Gakkai Zasshi. 1990 Feb;34(1):1-6. doi: 10.2186/jjps.34.1.
A remarkable gingival pigmentation around the restorated teeth was successfully treated by simple surgical removal; incision & coagulasion of deposits by electrosurgery. Before the treatment, a biopsy from the pigmented gingiva was histopathologically examined, and a lot of small pigment deposits were found in the lamina propria with no inflammation, but not in the epitherium. Elements constructing the deposits were also determined by means of an electron probe X-ray microanalyser. Silver was found to be the principal element of the deposits, but not found at all in the crown metal. These results suggested that the cause of the pigmentation was implantation of metal fragments from metal cores during abutment teeth preparation. Therefore, the surgical removal was performed. Relapses have not occurred for 3 years since the treatment.
通过简单的手术切除成功治疗了修复牙齿周围明显的牙龈色素沉着；采用电外科手术对沉积物进行切开和凝固。治疗前，对色素沉着的牙龈进行了组织病理学活检，在固有层发现了许多小的色素沉积物，无炎症，但上皮层未发现。还通过电子探针X射线微分析仪确定了构成沉积物的元素。发现银是沉积物的主要元素，但在牙冠金属中完全未发现。这些结果表明，色素沉着的原因是在基牙制备过程中金属核的金属碎片植入。因此，进行了手术切除。治疗后3年未出现复发。
