There are some guidelines on design of implant over-denture, the site of implant will affect the final result. The unfavorable bone structure of mandibular hemangioma restricts the number and the site of implant, modification of design is essential to improve the final result.
Multi-disciplinary cooperation should be established for extensive edentulous case. Overlay type prosthesis incorporating several types of attachments can be suitable for complex case because of acceptable results and easy maintenance.