CASE IN PRACTICE·

By HAROI,D CHAPMAN, L.D.S., ENGLAND

CL ASS III.-l\Iandibular incisors well in advance of maxillary incisors.Age 1.5 years.-Treatment started with elastic force acting from a head

cap, made by the mother, to an aluminium chin cap. No models at this period

(Fig. 1.) Age 1.9 years.-l\Iandibular incisors almost in contact withmaxillary incisors.

PiS - 1

(Figs. 2a and b.) Age 2.5 years.-Mandibular incisors in contact withmaxillary incisors; the latter have probably been pushed lingually by themandibular teeth as there is considerable overbite.

The case had been in this condition several months; it was thought thatthe overbite prevented correction, so a lower vulcanite plate was inserted atthis time; the plate covered the mandibular molars and opened the bite so that

there was no overlap; it was also made to press 21 112 lingually. Ten daysafter the plate had been put in, the incisor relations were correct, and it wasdiscarded.

"Given at a Demonstration Meeting of British Society for the Study of Orthodontics.

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Case tn Practice 761

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762 Harold Chapman

(Figs. 3a, b and co) Age 2010 years.-Arch-relationship normal.Fig. 4.-The head cap (made by the mother).Fig. 50-The aluminium chin .cap.Fig. 6.-The lower plate.