Clinical assessment of primary stability of endosseous implants placed in the incisor region, using resonance frequency analysis methodology: An <i> in vivo</i> study

• Main Authors: Ramakrishna R, Nayar Sanjna
• Format: Article
• Language: English
• Published: Wolters Kluwer Medknow Publications 2007-01-01
• Series: Indian Journal of Dental Research
• Subjects: Immediate loading; implant stability quotient; primary stability; resonance frequency analysis
• Online Access: http://www.ijdr.in/article.asp?issn=0970-9290;year=2007;volume=18;issue=4;spage=168;epage=172;aulast=Ramakrishna

<b>Aim:</b> To evaluate the effect of immediate loading on the primary stability of endosseous implants placed in the anterior incisor region by mapping the stability, using resonance frequency analysis, over a period of time.<b> Materials and Methods:</b> A total of eight implants (Zimmer Screw-Vent) were placed in four patients. The Osstell resonance frequency analyzer was used to determine the primary stability at baseline (day 1), 15^th day, 30^th day, 60^th day, and 90^th day for each of the eight implants. Analysis of data was done using SPSS (Statistical Package for Social Science; version 4.0.1). <b> Results: </b> All implants showed adequate initial stability at baseline with an ISQ &gt; 50. Implant nos. 1, 3, 4, 7, and 8 showed a high initial stability at baseline (ISQ &gt; 65), following which a decrease in the stability was recorded during the 15^th day, 30^th day, and 60^th day. By the 90^th day, the stability values were nearly equivalent to those obtained at baseline. The highest mean stability value was recorded on the day of implant placement. The lowest mean stability recording was obtained on the 30^th day after implant osteotomy. By the 90^th day, the mean stability value was nearly equivalent to that obtained at baseline. <b> Conclusions: </b> Within the limitations of this study, it can be concluded that immediate loading of implants placed in the maxillary and mandibular incisor region does not seem to have an adverse effect on the osseointegration of implants, which achieved a high primary stability. The use of the resonance frequency analyzer as a tool to monitor the variation in the stability of the implants over a period of time has been validated.