Fig. 1a: The Nite-Guide ‘C’ series worn passively at night prior to the full eruption of the first permanent molars.
Fig. 1b: The ‘G’ series worn only while sleeping, which also serves as a retainer until about age 12.
Fig. 2: Crowded (Bolton/Bergersen) and non-crowded cases (Moorrees, 1959) showing the mean changes.
Fig. 3: Three samples of potentially crowded cases with varying amounts of deciduous interproximal spacing, no spacing present and crowded deciduous incisors, all of which can result in varying degrees of crowding.
Fig 4: Risk of crowding by 7.9 years of age from the mandibular incisal spacing at 5.7 years of age. (From Bolton Sample/Bergersen. N=43 serial crowded dentitions.)
Fig 5: Two rotated permanent incisors, which will result in four broken contacts after teeth fully erupt.
Fig 6: Relation of mandibular incisal broken contacts to the projected crowding by 7.9 years of age.
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