Introduction: This clinical study was designed to compare between the efficiency ofmetallic and non- metallic bonded lingual retainers.Methods: A sample of 22 patients who finished orthodontic treatment with fixedorthodontic appliance were selected from the Orthodontic Department outpatient clinic,Faculty of Dentistry,Ain Shams University. The sample was divided into four groups [groupI] received a 0.0175 inch twist flex bonded retainer, [group II] received a braided bondedretainer,[group III] received a glass fiber reinforced composite retainer and [group IV] receiveda polyethylene reinforced composite retainer. The patients were followed up for a year onintervals of 3 months, impressions and intraoral photos were taken each visit ; the followingmeasures were measured on the casts: inter-canine width and irregularity index; also thesuccess rate was calculated for each group.Results: Change of inter-canine width and irregularity index were statistically non-significantin all the groups examined; success rate of [group IV] was 100%, [group II] was 50%,[group I ]40% and [ group III] was the least showing only 16.7% success rate.Conclusions: All types of bonded retainers are capable of maintain stability of anteriorteeth; with polyethylene fiber reinforced retainers showing the highest success rate promisingto be a viable alternative to metal retainers.