Book Review: Genetic Aspects of Affective Illness

importance of colour coding and a logical approach to instrument selection is stressed. The final chapters are devoted to assisting in various clinical procedures and to the training necessary for four-handed dentistry. The book is well illustrated. It would perhaps have been an advantage to have shown a bur in the handpiece in Figure 89, and the finger nails of the assistant in some of the plates are unacceptably long. Reference should perhaps have been made to dental assisting with the few patients who, for various reasons, will not be placed horizontally, and the need for all operatories to be able to be worked single-handed on those occasions when one's DSA may be absent. This book will be welcomed by all those interested in the practice of four-handed dentistry.