This reference describes the clinically important areas of the biological process underlying craniofacial growth and development. It relates basic science to treatment planning, treatment selection, results, relapse, tooth movement, effects of nonbiological prosthetic implants during growth and the biological basis for research studies. The book discusses the essentials of general growth principles and concepts such as mandibular, maxillary and basicranial development, prenatal growth, the facial "plan", facial variations, the biological reasons for different facial types and features, control processes, the developmental basis for malocclusions and ethnic characteristics. It also focuses on the application of biological concepts to clinical theory and organizes material for fast referral, including an introductory chapter that outlines the rest of the text. The volume provides detailed illustrations that clarity key concepts and developmental processes. It emphasizes soft tissue and skeletal interrelations and the developmental role of function.