الفهرس 
AcknowledgmentOnly 14 pages are availabe for public view
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Abstract
Background:many conditions effects on implant successes These conditions involve the achievement of primary stability, a suitable patient, biocompatible material, careful surgery, and appropriate healing time. Implants insertion torque the important factors that effevts in primary stability. Materials and Methods:A total of 18 patients suffered from missing mandibular first or second premolar teeth and required single implant-supported delayed restoration were eligible for inclusion in this study. Only 14 patients were enrolled in and were assigned according to the recorded IT to one of the two groups. group I included 7 patients with ITV ≥50Ncm, and group II included 7 patients with ITV <50Ncm. The two groups were evaluated regarding buccal bone thickness, facial soft tissue level, marginal bone loss and implant stability. Results:There were statistically significant differences in buccal bone plate thickness in group I when comparing baseline and 6months intervals (P=0.02) and in vertical bone resorption. While, there was no statistically significant difference regarding, facial soft tissue level and secondary stability. The strength of the association between IT and ISQ values was statistically significant for the entire sample (𝑝< 0.001) Conclusion: from the study results, it could be concluded that within 6month follow-up period the high IT adversely affects the buccal bone thickness and marginal bone with no significant difference on the soft tissue level or osseointegration. A positive linear correlation between primary stability and implant insertion torque was found for the entire sample but care should be taken in longer follow-up periods with higher torque values (≥50Ncm) because they could cause unnecessary stress to the bone-implant system without additional benefits in terms of stability.