This book emphasis knowledge towards fellow dentist and prosthodontist about the retention aids used for various maxillofacial prosthesis and plays a vital role in managing the defect, For a better retention to be obtained using of ideal retentive aids is essential along with aesthetics and function. Without using retentive aids achieving retention is quite difficult. Every Prosthodontist aims to attain this retention for a long-term use of prosthesis. Retention of any prosthesis is improved using retentive aids. The Oral and maxillofacial Prosthodontist with their wide knowledge, skill and experience plans the best and suitable mode of retention and retentive aid for maxillofacial prosthesis.