الفهرس 
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Abstract
The study was designed to evaluate the clinical impact of Osseospeed (TiO blasted, fluoride treated) implant surface and microthreaded neck design on early loaded implant versus SLA (sandblasted, acid etched) implant surface without microthreads.
Patients and methods: Fourteen female patients received sixteen dental implants were randomly and equally divided into two groups. In the study group, eight patients received Osseospeed dental implant with microthreaded-neck design placed in the posterior maxillary area while, in the control group eight patients received SLA dental implant with standard neck design placed in the posterior maxillary area. In both groups, all implants were loaded 8 weeks after surgery. All patients were assessed clinically immediately (T0), 6 months (T1) and at 12 months (T2) after loading regarding to implant stability, Modified sulcus bleeding index (mSBI), peri-implant pocket depth (PIPD) and radiographically for assessment of marginal bone loss (MBL). Results: Significant differences were recorded between both groups regarding to implant stability and MBL at (T0), (T1) and (T2) (P=0.023, 0.023, 0.028) respectively regarding to implant stability, and (P=0.001) for all time intervals regarding to MBL. No significant differences were recorded between both groups regarding to mSBI or PIPD either at (T0), (T1) and (T2) (P=1, 1, 0.480), (P=0.529, 0.723, 0.262) respectively. Conclusions: Osseospeed surface treatment together with microthreaded neck design can be considered as a modification that can improve significantly the implant stability and minimize marginal bone loss Key Words: Implant, Osseospeed, Microthreaded neck, SLA, Marginal bone loss, Implant stability.