Aim: External apical root resorption is one of the most common side effects of orthodontic treatment. Some amount of root resorption is inevitable in orthodontic. Most of the times root resorption is not severe and goes unnoticed but in few cases root resorption is severe. The cause of root resorption is multifactorial. Aim of this article is to give an insight of root resorption caused by orthodontic tooth movement. Material and method: Articles pertinent to root resorption caused by orthodontic tooth movement were first searched electronically and then hand searched. Relevant article were topic wise critically reviewed by all the reviewers. Conclusion: It was concluded that many factors are involved in root resorption. In this article possible method of curbing root resorption have also been described.
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