Effect of two different surface treatments on implant stability

Aim: The purpose of this research was to compare the effects of two different implant surface treatments (Direct laser metal forming and Acid etching) on implant stability in All-on-4 implant retained mandibular overdentures. Materials and methods : In this investigation, 14 male patients were chosen. For each patient, four implants were inserted in the inter-foraminal region using the All-on-4 concept. The patients have been randomly separated into 2 groups according to the surface treatment of the dental implants. In group I patients were rehabilitated with an upper complete denture and a lower retained overdenture using All-on-4 concept with Direct Laser Metal Forming surface treated dental implants, while in Group II patients were rehabilitated with an upper complete denture and a lower retained overdenture using All-on-4 concept with acid etched surface treated dental implants. Utilizing the osstell device, resonance frequency analysis was used to measure and compare primary and secondary implant stability at the time of implant placement and at 3, and 6 months later. Results: Comparison was performed between the straight implants of both groups and revealed that implant stability of group I is significantly higher than group II after 3months and after 6 months, while revealed insignificant difference between them at the time of insertion. Comparison was performed between the angled implants of both groups and revealed that implant stability of group I is significantly higher than group II after 3months and after 6 months, while revealed insignificant difference between them in time of insertion . Conclusion: Direct Metal Laser Forming surface treatment increases secondary stability of angled implants supporting All-on-4 temporary prosthesis.