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Prof. dr. Yijin Ren

Why we should not accelerate orthodontic tooth movement

Various methods for accelerating orthodontic tooth movement, both surgical and non-surgical, have been reported in the past 20 years. However, none of these methods have successfully provided a moderate level of evidence to support their efficacy. Studies demonstrating temporary positive outcomes during specific phases of orthodontic intervention have failed to establish their clinical relevance across the entire treatment period or to evaluate the potential complications and risks for relapse.
Is it scientifically justifiable to pursue accelerated tooth movement from a biological perspective? Does increased speed of tooth displacement necessarily lead to improved treatment outcomes? What ethical considerations come into play? Alternatively, shouldn’t we direct our efforts towards areas that can genuinely enhance patient well-being and elevate the standards of our profession?
I look forward to exchanging thoughts on these aspects with you and gaining inspiration from our collective insights.


Prof. Yijin Ren (DMD, MSc, PhD, MBA) is the head and program director (opleider) of the Department of Orthodontics at the University Medical Centre Groningen (UMCG). Prof. Ren's research interests include biofilms and biomaterials, tissue reactions during tooth movement, treatment of cleft lip and palate, and applications of 3D imaging in clinical practice. She has published and lectured extensively on her research work in these fields. She is the President- Elect for 2029 of the European Orthodontic Society