Results Observed from orthpanotomography the density of bone in cysts increased significantly, with new bone formation and decreasing of the vulcanicity of cysts.

结果通过曲面断层片中观察发现囊肿腔内骨密度增高，有不同程度的新骨形成，囊肿体积变小。

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Second, they coincided with one of the largest periods of vulcanicity in the past billion years.

ECONOMIST: Mass extinctions