The aim of the study was to examine the influence of mandibular two-implant retained overdentures on life quality of elderly Turkish patients. The study population comprised 78 edentulous complete denture wearers (aged 65-82) seeking implant-retained mandibular overdentures at Istanbul University, Turkey. Every patient received 2 dental implants in the interforaminal region of the mandible and maxillary conventional dentures and mandibular implant retained overdentures 6 weeks after surgery. Turkish versions of oral health impact profile (OHIP-14) and the United Kingdom oral health-related quality of life (OHQoL-UK) were used for the evaluation of life quality before and after treatment. Compared to pretreatment scores, subjects had statistically significant improvements in life quality after receiving new dentures (p < 0.05). Based on these results, it can be concluded that mandibular two-implant retained overdentures improve the life quality of elderly edentulous Turkish patients. (C) 2010 Elsevier Ireland Ltd. All rights reserved.