Non-extraction cases normally do not show significant amounts of spacing. When spaces occur, they can generally be closed without difficulty with the use of tiebacks as described in the space closure chapter (p. 254). This can be accomplished after leveling and bite-opening procedures.
Space closure should not be attempted until full bite opening and leveling has been achieved.
Fig. 6.19 Class II inter-maxillary elastics can contribute to the bite-opening effect.
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