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:: Volume 6, Issue 6 (1-2012) ::
3 2012, 6(6): 0-0 Back to browse issues page
The Influence of Insertion Torque on the Survival of Immediately Placed and Restored Single-Tooth Implants
Michael R. Norton *
Abstract:   (2311 Views)

 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.
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.
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.
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.


  Source : Journal of Oral & Maxillofacial Implant

  Full text

Keywords: dental implants, immediate placement, insertion torque
     
Type of Study: Research | Subject: Periodontology
Received: 2012/02/13 | Published: 2012/01/15
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Norton M R. The Influence of Insertion Torque on the Survival of Immediately Placed and Restored Single-Tooth Implants. 3 2012; 6 (6)
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Volume 6, Issue 6 (1-2012) Back to browse issues page
جامعه اسلامی دندانپزشکان Islamic Dental Association of IRAN

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