Abstract
The complete mandibular subperiosteal implant is one of the oldest implant modalities. It has been serving thousands of people for over 25 years. All failures and problems created in the past have been due to the inadequate support and improper architectural design of the implant substructure. Through the mistakes made in experimentation over the years, better results have been achieved because of the improvement of the implant design. Proper evaluation and utilization of the available bone is essential for a successful prognosis for the edentulous mandible. The crossbar attachment that joins the four implant posts of the substructure provides better force distribution and less potential for resorption below the primary struts of the complete mandibular subperiosteal implant. The cast substructure rests on the bone and is covered by the mucoperiosteum. Satisfactory retention and stability is given to the definitive overdenture which is fitted over the protruding posts and crossbar design. The complete mandibular subperiosteal implant is a definite solution to the problem mandibular edentulous patient. Proper, careful, and conservative diagnosis is important. Skill, experience, and accuracy are major criteria for the success of a dental implant.
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