Abstract
External apical root resorption (EARR) is probably the most common iatrogenic sequel of orthodontic treatment. The present case series focuses on the incisor retraction using frictionless mechanics. Boot loop made up of .019x.025 Stainless steel or TMA archwire were used for maxillary incisor retraction. Retraction with stainless steel boot loop showed greater root resorption as compared to TMA boot loop.Orthodontic Journal of Nepal, Vol. 6 No. 1, June 2016, pp.45-48
Highlights
External apical root resorption (EARR) is probably the most common iatrogenic sequel of orthodontic treatment
The severity of orthodontically induced inflammatory root resorption (OIIRR) is mostly clinically insignificant, the literature shows that 1-5% of orthodontically treated teeth have severe OIIRR, which is defined as resorption exceeding 4 mm or a third of the original root length
Apical root loss of 3 mm is equivalent to 1 mm of crestal bone loss, which means that periodontal bone loss will reach a critical stage more rapidly if it is accompanied by OIIRR.[4]
Summary
External apical root resorption (EARR) is probably the most common iatrogenic sequel of orthodontic treatment. Induced root resorption has been studied repeatedly in the orthodontic literature, the etiological factors bear no single consensus and is attributed to be multifactorial.[1] Inflammatory root resorption is a side effect related to the biological tissue response that enables the teeth to be moved during orthodontic treatment. The pre-retraction and post-retraction orthopantomogram revealed clinically significant external apical root resorption in the group in which retraction was carried out using stainless steel boot loop (Table 1, Figure 6-9) in comparison to TMA boot loop (Table 2, Figure 2-5)
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