locking gate

locking gate,

n a portion of the peripheral frame of a maxillary sub-periosteal implant; attached by a hinge. This device permits the implant to be placed into an area of undercut. After the implant is seated, the gate is closed and locked, and wire is wrapped around two locking buttons.
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Safety features include 60" high expanded metal back, dual locking gate, 42" high handrail with 21" midrail and 4" high kickplate.