2·On the contrary, primary malignant maxillary tumor showed invasive growth, irregular bony destruction with massive bony or chondral tumor, periosteal reaction and soft tissue mass.
相反原发性上颌骨恶性肿瘤则呈浸润性生长，骨质不规则破坏，大量瘤骨或瘤软骨形成、骨膜反应和软组织肿块等。
3·Objective To contrast the treatment effect of full-thickness chondral defects by articular debridement and microfracture and by articular debridement and washout under arthroscope.
目的比较关节镜下关节清理术结合软骨缺损区微骨折术与关节清理灌洗术治疗膝关节软骨全层缺损的临床疗效。