CD vs IOD Opposing Mandibular IOD : Bone Height Changes of the Premaxilla

The goal of this clinical trial is to evaluate bone resorption of the anterior region of maxillary arch. The main questions it aims to answer are: Does implants assisting maxillary complete denture enhance stability, retention and mastication of the patient ? Does implants assisting maxillary complete denture reduce bone resorption in the anterior region of maxilla ? Participants will: * receive 2 implants with attachments assisting their maxillary complete denture * Visit the clinic once every 6 months for checkups and tests