Background/purpose: There is large variation in root canal morphology and undetected canals and incomplete instrumentation are reasons for root canal treatment failure.The purpose of this study was to determine the best radiographic method for determining root canal morphology in mandibular first premolars in Chinese descendants in Taiwan.Materials
Pinus yunnanensis Franch.(Pinaceae) is an important endemic tree species that serves as a critical constituent of the forest ecosystems and plays a significant role in forestry economic production in southwest China.P.yunnanensis comprises three varieties: var.yunnanensis, var.pygmaea and var.tenuifolia, with significant variation in traits, such a
Although structurally and biochemically similar to the cellular prion (PrP(C)), doppel (Dpl) is unique in its biological functions.There are no reports about any neurodegenerative diseases induced by Dpl.However the artificial expression of Dpl in the PrP-deficient mouse brain causes ataxia with Purkinje cell death.Abundant Dpl proteins have been f