Lowangle cases

In most average- to low-angle cases, it is beneficial to level the entire curve of Spee. This should include placement of brackets or bands on second molars to complete the process. If the curve of Spee is not fully corrected in these cases, the lower incisors will be positioned more gingivally on the palatal surface of the upper incisors. This may make it difficult or impossible to complete final space closure in the upper arch and to keep these spaces closed. If the bite is opened properly and the curve of Spee is level, it is then possible to complete space closure in the upper arch with stability. Upper bite-plate retainers should be considered in cases that show a tendency for bite deepening during retention. This type of relapse can be accompanied by spacing in the upper arch and/or crowding in the lower arch.

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