Deciduous tooth eruption.

There is little information concerning deciduous tooth eruption pertaining to children of the United Kingdom and Europe. Therefore, data on children from the current longitudinal growth study at the Child Study Centre, London, were examined. For details of this sample, method of recruitment, and investigations carried out, etc., reference may be made to Moore, Hindley and Falkner (1954). Briefly, this unselected sample of approximately 200 children consists of the same 'healthy' children regularly and periodically seen and drawn from an area in London. The children are seen at the ages of 4 weeks (± 2 days), 13, 26, 39 weeks, 1 year, 18 months (±7 days), 2 years and thereafter yearly (± 14 days). The state of dentition is noted at each visit and for the purpose of this paper the total number of erupted teeth is given. The definition of eruption used is that stage when part of the crown of the tooth has pierced the gum (Robinow, Richards and Anderson, 1942; Doering and Allen, 1942; Falkner, 1955, 1957a). Distribution