The overview of textbooks of formulas of Chinese medicine is a general discussion, which is about the concepts of the discipline, characteristics of the connotation, the core theories, and the basic technique. The content of the text books is not just the core theory of formulas of Chinese medicine, but also the foundation of logicalization of curriculum knowledge, which has an important position in textbook compilation. This article tried to make the overviews in the main versions of textbooks of formulas of Chinese medicine as the object of study to understand the evolution and development of the theory of formulary science and to explore the existing problems in the construction of discipline theory for textbooks by comparing and analyzing the relevant contents.

The clinical failure factors of Orthopedic implants which happened recent years have been summarized. The main failure factors are quality of orthopedic implants itself, iatrogenic and patient-derived. The ways to preventive measures have been suggested.
Orthopedic Procedures ; instrumentation ; Prostheses and Implants ; Prosthesis Failure