Rodrigues J L, Seraidarian P I, Oliveira D D, Jansen W C, Alves K P S, Faria-e-Silva A L
Eur J Prosthodont Restor Dent. 2014 Sep;22(3):132-5.
This study evaluated the effects of the remaining coronal tissue and post type on the fracture strength of incisors. Sixty human maxillary central incisors were sectioned at the cemento-enamel junction or at 2 mm above this junction. The roots received cast cores and posts, fibre posts, or relined fibre posts (n = 10 each). A compressive load was applied over the cores untilfracture. In the absence of coronal structure, the fracture strength did not differ among the post types evaluated. In the presence of remaining coronal structure, the fracture strength was higher in specimens with cast cores and posts.
本研究评估了剩余冠部组织和桩类型对切牙骨折强度的影响。60颗人上颌中切牙在牙骨质-釉质界或该界上方2毫米处进行切片。牙根分别制作铸造桩核、纤维桩或重新衬里的纤维桩（每组n = 10）。在桩核上施加压缩载荷直至骨折。在没有冠部结构的情况下，所评估的桩类型之间的骨折强度没有差异。在存在剩余冠部结构的情况下，铸造桩核的标本骨折强度更高。
