Background: Reduced crestal bone height at the edentulous posterior maxilla results from atrophy of alveolar ridge and pneumatization of the maxillary sinus. The present study was conducted to assess outcome of intentional perforation of maxillary sinus during implant placement. Materials & Methods: The present study was conducted on 65 patients (80 implants) with missing maxillary posterior teeth of both genders. Based on the ratio of IO and IS compartment, implants were divided into 3 groups. Group 1 (G1): IO: IS is 5:1, Group 2 (G2): IO: IS is 4:2, and Group 3 (G3): IO: IS is 3:3. Parameters such as torque, bone fill and bone density was assessed at baseline and after 6 months. Results: There were 30, 26 and 24 dental implants in group I, II and III respectively. The mean torque in group I was 39.1 N/cm, in group II was 35.2 N/cm and in group III was 38.5 N/cm. The difference was non- significant (P> 0.05). The mean bone fill in group I was 1.58 mm2, in group II was 1.72 mm2 and in group III was 1.95 mm2. The difference was non- significant (P> 0.05). The mean bone density on day 0 in group I was 172.4 HU, in group II was 146.8 HU and in group III was 184.2 HU. On day 180, mean bone density was 472.1 HU, 394.6 HU and 462.8 HU in group I, II and group III respectively. The difference was non- significant (P> 0.05). Conclusion: Authors found that survival rate of implants were not influenced either by torque or by the depth of penetration of implant into the maxillary sinus. Key words: Maxillary sinus, Implants, Torque