{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T10:22:13Z","timestamp":1790763733143,"version":"4.1.0"},"reference-count":68,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"8","license":[{"start":{"date-parts":[[2020,8,1]],"date-time":"2020-08-01T00:00:00Z","timestamp":1596240000000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"content-domain":{"domain":["lww.com","ovid.com"],"crossmark-restriction":true},"short-container-title":[],"abstract":"<jats:p>External apical root resorption is one of the most deleterious complications after orthodontic treatment. Studies to explain the causal relationship between orthodontic tooth movement and external apical root resorption have been inconclusive till date. Individual variations in external apical root resorption sometimes overshadow the treatment related factors which indicate genetic predisposition and\/or multifactorial etiology. Mechanism of root resorption is not completely understood. Inflammatory root resorption induced by orthodontic treatment is a part of process of elimination of hyaline zone. An imbalance between bone resorption and deposition may contribute to root resorption by the cementoclasts\/osteoclasts. This narrative review article explains the molecular pathway involved in external apical root resorption and also role of various genes involved at different level. It also reviews the literature published during the past 20 years concerning the association studies linking EARR to genetic polymorphisms. This literature review provides an insight into genetic predisposition of external apical root resorption that can be used in orthodontic practice to enable 'high-risk' subjects to be identified on the basis of their genetic information before orthodontic treatment is initiated.<\/jats:p>","DOI":"10.4103\/jfmpc.jfmpc_802_20","type":"journal-article","created":{"date-parts":[[2020,9,1]],"date-time":"2020-09-01T05:57:47Z","timestamp":1598939867000},"page":"3872-3882","update-policy":"https:\/\/doi.org\/10.1097\/lww.0000000000001000","source":"Crossref","is-referenced-by-count":26,"title":["External apical root resorption in orthodontic patients: molecular and genetic basis"],"prefix":"10.4103","volume":"9","author":[{"given":"Shilpa","family":"Kalra","sequence":"first","affiliation":[{"name":"Department of Orthodontics and Dentofacial Orthopaedics, Maulana Azad Institute of Dental Sciences, New Delhi, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Prateek","family":"Gupta","sequence":"additional","affiliation":[{"name":"Department of Orthodontics and Dentofacial Orthopaedics, Maulana Azad Institute of Dental Sciences, New Delhi, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tulika","family":"Tripathi","sequence":"additional","affiliation":[{"name":"Department of Orthodontics and Dentofacial Orthopaedics, Maulana Azad Institute of Dental Sciences, New Delhi, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Priyank","family":"Rai","sequence":"additional","affiliation":[{"name":"Department of Orthodontics and Dentofacial Orthopaedics, Maulana Azad Institute of Dental Sciences, New Delhi, India"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"276","published-online":{"date-parts":[[2020,8]]},"reference":[{"key":"R1-20260817","doi-asserted-by":"crossref","first-page":"138","DOI":"10.1016\/S0889-5406(05)81763-9","article-title":"Root resorption after orthodontic treatment Part 2 Literature review","volume":"103","author":"Brezniak","year":"1993","journal-title":"Am J Orthod Dentofacial Orthop"},{"key":"R2-20260817","first-page":"357","article-title":"Scanning electron microscopy of tissue changes on the pressure surface of human premolars following tooth movement","volume":"80","author":"Kvam","year":"1972","journal-title":"Scand J Dent Res"},{"key":"R3-20260817","first-page":"180","article-title":"Orthodontically induced inflammatory root resorption. 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