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Randomized Controlled Trial
. 2023 Jun 5;28(2):e2321345.
doi: 10.1590/2177-6709.28.2.e2321345.oar. eCollection 2023.

Survival rate and stability of surface-treated and non-surface-treated orthodontic mini-implants: a randomized clinical trial

Janani Ravi  1 , Sangeetha Duraisamy  1 , Krishnaraj Rajaram  1 , Ravi Kannan  1 , Edeinton Arumugam  1
Affiliations
Randomized Controlled Trial

Survival rate and stability of surface-treated and non-surface-treated orthodontic mini-implants: a randomized clinical trial

Janani Ravi et al. Dental Press J Orthod. .

Abstract
in English, Portuguese

Objectives: This clinical trial was conducted to evaluate the stability and failure rate of surface-treated orthodontic mini-implants and determine whether they differ from those of non-surface-treated orthodontic mini-implants.

Trial design: Randomized clinical trial with a split-mouth study design.

Setting: Department of Orthodontics, SRM Dental College, Chennai.

Participants: Patients who required orthodontic mini-implants for anterior retraction in both arches.

Methods: Self-drilling, tapered, titanium orthodontic mini-implants with and without surface treatment were placed in each patient following a split-mouth design. The maximum insertion and removal torques were measured for each implant using a digital torque driver. The failure rates were calculated for each type of mini-implant.

Results: The mean maximum insertion torque was 17.9 ± 5.6 Ncm for surface-treated mini-implants and 16.4 ± 9.0 Ncm for non-surface-treated mini-implants. The mean maximum removal torque was 8.1 ± 2.9 Ncm for surface-treated mini-implants and 3.3 ± 1.9 Ncm for non-surface-treated mini-implants. Among the failed implants, 71.4% were non-surface-treated mini-implants and 28.6% were surface-treated mini-implants.

Conclusion: The insertion torque and failure rate did not differ significantly between the groups, whereas the removal torque was significantly higher in the surface-treated group. Thus, surface treatment using sandblasting and acid etching may improve the secondary stability of self-drilling orthodontic mini-implants.

Trial registration: The trial was registered in the Clinical Trials Registry, India (ICMR NIMS). Registration number: CTRI/2019/10/021718.

Objetivos:: Este ensaio clínico foi conduzido para avaliar a estabilidade e a taxa de falha de mini-implantes ortodônticos com superfície tratada, e determinar se elas diferem das dos mini-implantes ortodônticos sem superfície tratada.

Desenho do estudo:: Ensaio clínico randomizado com desenho de boca dividida.

Instituição:: Department of Orthodontics, SRM Dental College, Chennai/India.

Participantes:: Pacientes que necessitavam de mini-implantes ortodônticos para retração anterior em ambas as arcadas.

Métodos:: Mini-implantes ortodônticos autoperfurantes, cônicos, de titânio com ou sem tratamento de superfície, foram colocados em cada paciente, seguindo um desenho de boca dividida. Os torques máximos de inserção e de remoção foram medidos para cada mini-implante, usando um torquímetro digital. As taxas de falha foram calculadas para cada tipo de mini-implante.

Resultados:: O valor médio do torque máximo de inserção foi de 17,9 ± 5,6 Ncm para mini-implantes com superfície tratada e 16,4 ± 9,0 Ncm para mini-implantes sem superfície tratada. O valor médio do torque máximo de remoção foi de 8,1 ± 2,9 Ncm para mini-implantes com superfície tratada e 3,3 ± 1,9 Ncm para mini-implantes sem superfície tratada. Entre os implantes que falharam, 71,4% eram mini-implantes sem superfície tratada e 28,6% eram mini-implantes com superfície tratada.

Conclusão:: O torque de inserção e a taxa de falha não diferiram significativamente entre os grupos; porém, o torque de remoção foi significativamente maior no grupo com superfície tratada. Assim, o tratamento de superfície com jateamento e condicionamento ácido pode melhorar a estabilidade secundária dos mini-implantes ortodônticos autoperfurantes.

Registro do estudo:: Esse estudo foi registrado no Clinical Trials Registry, Índia (ICMR NIMS). Número de registro: CTRI/2019/10/021718

PubMed Disclaimer

Conflict of interest statement

The authors report no commercial, proprietary or financial interest in the products or companies described in this article.

Figures

Figure 1:
Figure 1:. A) Surface treated A1 mini-implant. B) Non-surface treated A1 mini-implant.
Figure 2:
Figure 2:. A, B) Type I pattern: surface-treated mini-implants placed in the maxillary right and mandibular left quadrants, and the non-surface-treated mini-implants were placed in the maxillary left and mandibular right quadrants. C, D) Type II pattern: surface-treated mini-implants placed in the maxillary left and mandibular right quadrants, and non-surface-treated mini-implants placed in the maxillary right and mandibular left quadrants.
Figure 3:
Figure 3:. TQ- 8800 Digital torque meter.
Figure 4:
Figure 4:. Measurement of insertion torque using Lutron TQ- 8800 digital torque meter.
Figure 5:
Figure 5:. Consort flow diagram.
See this image and copyright information in PMC

References

    1. Costa A, Raffainl M, Melsen B. Miniscrews as orthodontic anchorage a preliminary report. Int J Adult Orthodon Orthognath Surg. 1998;13(3):201–209. - PubMed
    1. Wilmes B, Bowman JS, Baumgaertel S. Ludwig B, Baumgaertel S, Bowman SJ. Mini-implants in orthodontics: innovative anchor-age concepts. London: Quintessence; 2008. Fields of application of mini-implants; pp. 91–122.
    1. Kanomi R. Mini-implant for orthodontic anchorage. J Clin Orthod. 1997;31(11):763–767. - PubMed
    1. Melsen B, Costa A. Immediate loading of implants used for orthodontic anchorage. Clin Orthod Res. 2000;3(1):23–28. - PubMed
    1. Lee JS, Kim JK, Park YC, Vanarsdall RL. Applications of orthodontic mini-implants. Chicago: Quintessence; 2007.

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