DR. T.E. THOMPSON / SCIENCE PHOTO LIBRARY DR. T.E. THOMPSON / SCIENCE PHOTO LIBRARY
X-ray of child's skull showing development of milk (deciduous) teeth. The milk teeth are progressively lost in preparation for the appearance of adult teeth, & consist of 20 teeth, made up of incisors, canines & molars only. Between the ages of 6 & 12 years both adult & milk teeth are present (ie a mixed dentition). The set of 32 adult teeth (the permanent dentition) is usually present by age of 21 years.
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