French to English Medical Medical: Dentistry Document on Axiom3 dental implants

This is one of a series of articles about the Axiom3 dental implant system. A dentist states: "J’ai posé cet implant dans les secteurs encastrés principalement et surtout au maxillaire." Having translated a number of documents on this implant system I have not come across "encastré". I think "secteur" is "quadrant", but am not at all sure what is meant by "encastré". Does it refer to a quadrant that has been prepared for implants with the necessary pegs, etc.? It is a document for Anthogyr and is French French as opposed to Swiss or Belgian French. Thanks for all suggestions, as always.