Severe dislocation of mandibular second premolar associated with deep ankylosis of primary molar

Abstract

Background

Severe ankylosis is rare and any affected teeth are unlikely to exfoliate spontaneously. If left untreated, subsequent complications can develop.

Case presentation

We treated a boy aged 10 years with a tooth affected by ankylosis for a long period, which caused dislocation of the mandibular second premolar. Because adjacent teeth were inclined, there was insufficient space for extraction and space regaining therapy was required.

Conclusion

It is important to properly determine the severity of the ankylosed tooth when it is detected and provide treatment with appropriate timing.