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Fig 16: Z spring appliance with posterior bite raised Fig 17: Appliance activated intra-orally.
fabricated.

Fig 18: 19 days later – 11, 21 have jumped the bite Fig 19: 9 months later – 12, 22 have sufficient space (Figures 10 and 11)
to erupt and gingivae on 41 is less receded.

Fig 20: A 9 year old with 21 and 16 in crossbite. Fig 21: A removable appliance with a combination of
single tooth expansion screw & Z spring inserted. The
expansion screw would be activated one turn/ day by
the parent.

Fig 22: Labial View with the appliance seated in the mouth and bite raised. Fig 23: 14 days later - 16 & 21 – have jumped the bite. The molars
require significant pressure being multi- rooted as compared to the
anterior single rooted teeth.
Dental Practice I November-December 2024 I Vol 20 No 5 23