INTRODUCTION: Numerous publications have verified that tooth extraction is followed by dimensional changes of the alveolar ridge contour. The resorption of the alveolar ridge is more pronounced on the buccal than on the lingual aspect of the extraction socket. In particular, in the aesthetic zone, the successive soft and hard tissue deficiencies can interfere with optimal implant positioning and hamper the overall aesthetic outcome of implant-supported prostheses. OBJECTIVES: This study was designed to evaluate the socket shield technique clinically and radiographically as a new modality for immediate implantation in comparison to the conventional technique. MATERIALS AND METHODS: twenty patients were included in this study (n=20). They were divided in two groups; group I: Ten maxillary single rooted teeth were extracted followed by immediate implant placement using the socket shield technique. Group II: Ten maxillary single rooted teeth were extracted followed by immediate implant placement using the conventional technique. All implants were evaluated clinically and radiographically to evaluate bone loss on intervals of 1, 4 and 7 months. RESULTS: the mean horizontal and vertical bone loss value in socket shield technique group was 0.09±0.03mm & 0.43±0.23mm contrary to the conventional implantation after 7 months follow up, which was 0.33±0.14mm & 1.56±0.77mm which was statistically significant. CONCLUSIONS: The socket shield technique was beneficial in preserving the buccal bone plate

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Introduction:Long-term studies have documented the successful treatment of edentulous and partially edentulous patients with endosseous titanium implants. Success rates between 81% and 93% have been reported. Successful treatment with endosseous implants is dependent upon a complex relationship of numerous factors. Bone density and implant stability are important factors for implant osseointegration which has been widely demonstrated by several authors. Objectives: This study was designed to evaluate the correlation between bone density estimated by Cone-Beam Computed Tomography (CBCT) and stability of dental implants estimated by resonance frequency analysis using Osstell ISQ. Materials and methods: Ten dentis s-clean tapered implants were inserted in posterior mandibular edentulous spaces in ten adult patients. The bone density of implants recipient sites were determined by density value (HU) using CBCT. And the implants' stability were determined by quantitative unit called implant stability quotient (ISQ) measured by resonance frequency analysis using Osstell ISQ. Both values were determined immediately post-operatively and on intervals of 3&6 months. Results: The mean implant stability value was 67.3 ± 9.14 immediately post-operatively, then increased on the 3rd month to be 72.3 ± 3.95 & 75.2 ± 5.33 on the 6th month, there was a statistical significant increase. Also the results of the present study showed that the mean bone density value was 827.96 ± 206.85 immediately post-operatively, then increased to 890.67 ± 138 & 1018.0 ± 149.79 on the 3 rd and 6 th months respectively, there was a statistical significant increase. Conclusion: There was no correlation between bone density and implant stability.

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