summary in English at the end of each of the thirty contributions, with a bibliography which is useful for finding references to the foreign literature in each field. One of the most interesting parts of the work is a final chapt,er containing discussions of the results of the various procedures described. A comparison is made of the results obtained in the various clinics using similar methods. K. H. 7. Essentials
The third edition of this book, like the previous two editions, will serve as an excellent teaching text for dental students and as a source of reference for dental practitioners interested in the essentials of removable partial denture prosthesis. It is divided into two parts. The first, “The Fundamentals of Removable Partial Denture Prosthesis,” is devoted to a meticulous explanation in finite detail of every consideration involved in the fabrication of removable partial dentures. Particular emphasis is placed upon the biologic factors which influence removable partial denture design. The methods for adapting the mechanical requirements to meet the variety of biologic demands are well described and illustrated. It is this feature that elevates the stature of this text above that of a mere blueprint for mechanical design. Detailed descriptions of the components of the removable partial denture and their function leave nothing to the imagination. Part 2 of the text is devoted to “Clinical Procedures in Removable Partial Denture Prosthesis.” In this section, chairside procedural techniques are chronologically described and a variety of cases and their inherent problems are discussed. The book is printed in an easy-to-read type and style, and the quality of the illustrations is excellent. It is recommended as a most worthwhile addition to any dental library. David J. Baraban.
Abstract’s of current literature Cancer
J. A. M.
Cancer, including acute leukemia and malignant lymphoma, is the leading medical cause of death among children. About 90 per cent of all childhood malignancies consist of acute leukemia, lymphoma, brain tumors, retinoblastoma, bone and soft-tissue sarcoma, neuroblastoma, and embryonal carcinosarcoma (Wilms’ tumor). The clinical records of 778 children with malignant disease were examined at the University of Texas in Houston. Of the children, all of whom were 14 years or younger, 193 had acute leukemia, 99 had lymphomas, and 486 had other kinds of malignant disease. In 210 (27 per cent) of the 778 patients the primary lesions were in the head and neck region. The most frequent diagnoses were malignant lymphoma, rhabdomyosarcoma and soft-tissue sarcoma, retinoblastoma, brain tumor, and carcinoma of the thyroid. Three cases of ameloblastoma were included in the study. Definitive treatment consisted principally of surgical and radiation procedures, singly or in combination. A challenging aspect of the treatment for children with cancer of the head and neck is the maximal utilization of therapeutic chemical agents. Drugs, such as Mustargen hydrochloride, triethylenemelamine, Cytoxan, and vincristine sulfate have produced beneficial, though temporary, control of malignant lymphoma. Both vincristine sulfate and actinomycin D have caused regression of metastatic rhabdomyosarcoma. Other drugs are discussed briefly. The full utilization of chemical agents in treatment and adjunctive therapy is advocated. D. R. King