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ORIGINAL ARTICLE
Year : 2018  |  Volume : 8  |  Issue : 3  |  Page : 139-145

Measurement of primary stability of mini implants using resonance frequency analysis


1 Department of Orthodontics and Dentofacial Orthopaedics, Manav Rachna Dental College, Faridabad, Haryana, India
2 Private Orthodontics Practice, Faridabad, Haryana, India
3 Department of Orthodontics and Dentofacial Orthopedics, SDM College of Dental Sciences, Dharwad, Karnataka, India

Correspondence Address:
Ameet V Revankar
Associate Professor, Department of Orthodontics and Dentofacial Orthopedics, SDM College of Dental Sciences and Hospital, Sattur, Dharwad, Karnataka
India
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/apos.apos_20_18

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Introduction: In the last decade, anchorage control with mini-implants has gained enormous credibility in maintaining orthodontic anchorage. Resonance frequency analysis (RFA) has proven to be an adequate method to measure the stability of these mini-implants because of its non-invasiveness and contactless measurement method. Materials and Method: Tomas and S.K surgical mini-implants were tested. For this purpose custom fabricated attachment was fabricated to attach the smart peg on orthodontic mini-implant head, and 45 mini-implants were inserted in fresh swine pelvic bone in the density matched sites to that of most common sites where mini-implants are placed in human mandible. Mini-implants of two different lengths with diameter constant were also placed to assess the effect of length on primary stability. Results: The mean ISQ of Group 1 (Tomas 10 mm) was 55.53±3.39 while that of Group 2 (S.K Surgical 10mm) was 56.63±3.48 and that of Group 3(S.K Surgical 8 mm) was 55.90±3.48. Difference among the groups were not statistically significant when ANOVA test was used (P >0.05). Conclusion: The resonance frequency analysis is applicable to comparatively assess the primary stability of orthodontic mini-implants. There was no difference in primary stability of Tomas and S.K Surgical mini-implant and primary stability was not affected by the length of the mini-implant.


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