"The Archives of Dentistry, Vol. VII, No. 12, December 1890" by Various is a scientific publication written in the late 19th century. This detailed volume serves as an academic journal that discusses various contemporary issues and advancements in the field of dentistry. It likely covers dental practices, techniques, and advancements relevant to practitioners of the era. The opening portion of the volume presents a focus on the potential abuses in crown and bridge work within dentistry, as outlined by Dr. Walter M. Bartlett. He categorizes roots that are often crowned into three classes and discusses the complications that can arise from treating damaged roots with crowns and bridges. Bartlett emphasizes the importance of careful selection and treatment, warning against the quick fixes that can lead to inflammation or further decay. The content reflects a deep concern for the ethical practice of dentistry and the importance of proper techniques and education for dental professionals during that period. (This is an automatically generated summary.)