Histological evaluation at 1, 6, or 18 months after injection showed that the calcium hydroxylapatite particles were surrounded by a lymphocytic infiltrate with multiple foreign body giant cells.

• 在注射后1、6或是18个月后接受病理检验，结果显示，羟磷灰石钙颗粒被淋巴球浸润，以及多重外在物质巨细胞环绕。