en پریودنتولوژی Periodontology پژوهشي Research <p> Purpose: The purpose of this retrospective study was to evaluate the medium- to long-term clinical outcome of single-tooth implants placed into fresh extraction sockets using a low-insertion-torque protocol and immediately restored with acrylic resin provisional crowns. <br>Materials and Methods: Sixty-one patients consecutively referred for the replacement of one or more failing teeth were planned for treatment by means of extraction and immediate implant placement and provisionalization using a low-insertion-torque protocol of ≤ 25 Ncm. Low rotational stability was not a contraindication to treatment unless there was a lack of axial stability. Implant survival and marginal bone levels were documented. A statistical analysis was performed to discover any correlations between insertion torque, age, gender, implant size and tooth position and marginal bone loss. <br>Results: Sixty-eight implants were placed. Three implants failed to osseointegrate one was replaced and immediately restored and has been successful for more than 5 years. The overall survival rate for all implants was 95.5%, which have been in function for a period of 1.25 to 9.5 years. The mean marginal bone loss of the 54 implants followed for at least 24 months was 0.23 ± 0.60 mm mesially and 0.20 ± 0.72 mm distally. Overall, 78% of implants showed no marginal bone loss, 9% experienced 0.1 to 0.5 mm of bone loss, and 13% demonstrated > 0.5 mm of bone loss. There were no significant correlations between the various parameters analyzed and marginal bone loss. <br>Conclusion: A torque of only 25 Ncm would seem more than sufficient to yield a favorable clinical outcome, and there may be a misconception as to what actually represents adequate primary stability. Immediate provisionalization of single-tooth implants placed with a relatively low insertion torque can yield favorable survival rates and optimal maintenance of marginal bone levels compared to the generally accepted norm.</p><hr><p></p><p> <strong> Source </strong>: Journal of Oral & Maxillofacial Implant </p><p><a href="http://jomi.quintessenz.de/index.php?jid=jomi&doc=toc&year=2011&issue=6" target="_blank"><font color="#0000cc">  Full text </font></a></p> dental implants, immediate placement, insertion torque 0 0 http://idai.ir/browse.php?a_code=A-10-32-298&slc_lang=en&sid=1 Michael R. Norton 10031947532846001238 10031947532846001238 Yes