The use of dental implants has gained immense popularity and inside acceptance. A secure implant primary stability is positively associated with a successful implant integration and long-term successful clinical outcome. The aim of this study was to assess the effect of primary stability in success of dental implants. The present retrospective study was conducted among 1263 patients who had undergone implant therapy in the Department of Implantology, Saveetha Dental College and Hospitals, Chennai from June 2019 to March 2020. Data regarding bone type, bone density of the implant site were collected and analysed. In the present study, most of the type of bone density seen commonly was D2 bone and around 42.79% of the patients had D2 type of bone density in the lower posterior region. The next commonly seen bone density was D1 and in the lower posterior and lower anterior region with 8.51% and 2.36% respectively. In association with the gender and the bone density males had more bone density than females. Most of the type of bone density seen was D2 ( 34.12% in males and 30.58% in females, followed by D1 type of bone density ( 6.93% in males and 6.62% in females). Positive correlation was obtained between bone density and primary implant stability. The correlation was found to be statistically significant (p=0.000). The present study showed a strong relationship between bone density and the primary implant stability.