Eventually, the journey of localising a proper border for the prosthesis with edentulous tissue may not be clearly identified in accordance with the oral function, specifically the movable tissue and mandibular arch. In contrast, overcoming the challenge with adapting between the impression surface and supported tissue is grant reasonably through a proper compression distribution.
Consequentially, the combination of anatomical and functional impressions will achieve the quits of impression surface to be fully adapting towards both primary and secondary supporting areas; moreover, it will release the unwanted pressure for the other.
With regard to the impression materials, in free undurcut cases, the rigid impressions are substantially awarded the prosthesis a long-term and farthur adaptation with mucosa, by which the tolerance by the patient is reasonably capable, regardless of any troubles at the moment of insertion.In contrast, silicone may be awarded the prosthesis initial sealing at insertion,in another aspect it will diminish its long-term adaptability.
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