Where we should place our orthodontic miniscrews?

September 24, 2018

This is a systemic review in which our director Dr Mohammed Almuzian participated as a co-author along with the great team from Cairo, Edinburgh and Dundee and it has been published today! 


What the authors tried to answer? This review answered the following question "What is the role of anatomical sites and correlated risk factors on the survival of orthodontic miniscrew implants:"

What the authors have done? An electronic search was conducted in the Cochrane Central Register of Controlled Trials (CENTRAL), Web of Knowledge, Scopus, MEDLINE and PubMed up to October 2017. A comprehensive manual search was also performed. Randomised clinical trials and prospective non-randomised studies, reporting a minimum of 20 inserted miniscrews

What did the authors find? Overall, 61 studies were included in the quantitative synthesis. Palatal sites had failure rates of 1.3% (95% CI 0.3–6) , 4.8% (95% CI 1.6–13.4) and 5.5% (95% CI 2.8–10.7) for the midpalatal, paramedian and parapalatal insertion sites, respectively. The failure rates for the maxillary buccal sites were 9.2% (95% CI 7.4–11.4), 9.7% (95% CI 5.1–17.6) and 16.4% (95% CI 4.9–42.5) for the interradicular miniscrews inserted between maxillary first molars and second premolars and between maxillary canines and lateral incisors, and those inserted in the zygomatic buttress respectively. The failure rates for the mandibular buccal insertion sites were 13.5% (95% CI 7.3–23.6) and 9.9% (95% CI 4.9–19.1) for the interradicular miniscrews inserted between mandibular first molars and second premolars and between mandibular canines and first premolars, respectively. The risk of failure increased when the miniscrews contacted the roots, with a risk ratio of 8.7 (95% CI 5.1–14.7).

Access to full paper from this link.

The results (failure rate) are simply demonstrated in this figure. 

 

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