Sleep Medicine is a relatively new medical specialty that has demonstrated its clear relevance to the practice of many other specialties, and dentistry is no exception. This issue of Dental Clinics of North America includes articles that address aspects of sleep medicine most relevant to the dentist, such as bruxism, breathing disorders, and Insomnia.

This issue reviews the major areas of clinical interest in Dental Sleep: Sleep Bruxism; Oral Evaluation and Screening by the Dentist; the Neurologic Basis of Sleep Breathing Disorders; Sleep and Orofacial Pain; Cone Beam Imaging of the Airway; The Cervical Spine: Considerations and Treatment for Sleep Disordered Breathing; the Role of the Nasal Airway; Myofunctional Tongue Therapy for Speech Therapy; Ambulatory Testing by the Dentist for Oral Appliance Therapy; Exercises to Address Posture, the Cervical Spine and the Airway; Oral Appliance Therapy for Sleep Breathing; Surgical Therapy for Sleep Breathing Disorders; Sleep Disorders and Headache; and Anatomy of the Airway.? Every sleep specialist needs to be aware of how dental concerns can impact sleep behaviors and sleep disorders.

The deep-sea ecosystems include waters and sediments at the lowest layer in the ocean, existing below the thermocline and above the seabed, at a depth of 1000 fathoms (1800 m) or more. They represent the world's largest biome, covering more than 65% of the world surface and including more than 95% of the global biosphere. This book examines the marine biology, geology and human impact of the deep-sea environment. Topics discussed include the stratigraphical distribution and evolutionary classification of the schackoinid planktic foraminifera; the biological characteristics of the skilfish, erilepis zonifer in the North Pacific Ocean; protein degradation at deep-sea sediment; primary production and carbon cycling in the deep-sea; and biodiversity and ecosystem function in the deep-Mediterranean Sea.