• Abdul Rahman Khan Aga Khan University Hospital
  • Mubassar Fida Aga Khan University Hospital
  • Attiya Shaikh Aga Khan University Hospital


Background: External apical root resorption (EARR) is one of the detrimental outcomes of an orthodontic treatment.   The study was aimed to compare the mean EARR between endodontically treated and its contralateral vital tooth in adult orthodontic subjects. Methods: A total of 30 subjects were included in the study. EARR was evaluated on pretreatment and   post-treatment orthopantomograms using Rogan Delft View Pro-X software.  Equal number of endodontically treated and their contralateral vital teeth were evaluated. Linge and Linge method was used to evaluate the pretreatment and post-treatment root lengths.  For comparison of EARR between genders, treatment type and vital versus endodontically treated teeth, Mann-Whitney U Test was applied.  Spearman correlation was applied to determine the correlation of EARR with age of the patient, duration of treatment and pretreatment root length.  A probability value of ≤0.05 was kept as statistically significant. Results: Vital teeth showed more root resorption as compared to endodontically treated teeth and in females as compared to males. A weak positive correlation was found between the root resorption and patient’s age & pretreatment root length. In vital teeth, a weak negative correlation was appeared between root resorption and duration of the treatment.  However, none of these correlations were significant. Conclusions: EARR appeared to be greater in vital as compared to the root filled teeth and in females as compared to the males.  However, EARR was not significantly correlated with duration of treatment, age of patient and pretreatment root length.Keywords: Orthodontic Treatment, Root Resorption, Root Apex, Endodontically Treated, Vital Teeth

Author Biography

Abdul Rahman Khan, Aga Khan University Hospital

Resident, Department of Surgery Aga Khan University Hospital


Kocadereli I, Yesil TN, Veske PS, Uysal S. Apical root resorption: a prospective radiographic study of maxillary incisors. Eur J Dent 2011;5(3):318–23.

Al-Qawasmi RA, Hartsfield JK Jr, Everett ET, Flury L, Liu L, Foroud TM, et al. Genetic predisposition to external apical root resorption. Am J Orthod Dentofacial Orthop 2003;123(3):242–52.

Baumrind S, Korn EL, Boyd RL. Apical root resorption in orthodontically treated adults. Am J Orthod Dentofacial Orthop 1996;110(3):311–20.

Jiang RP, McDonald JP, Fu MK. Root resorption before and after orthodontic treatment: a clinical study of contributory factors. Eur J Orthod 2010;32(6):693–7.

Lee YJ, Lee TY. External root resorption during orthodontic treatment in root-filled teeth and contralateral teeth with vital pulp: A clinical study of contributing factors. Am J Orthod Dentofacial Orthop 2016;149(1):84–91.

Profitt WR, Fields HW, Sarver DM. Contemporary orthodontics. 5th ed. St. Louis: Mosby, 2013.

Marques LS, Ramos-Jorge ML, Rey AC, Armond MC, Ruellas AC. Severe root resorption in orthodontic patients treated with the edgewise method: prevalence and predictive factors. Am J Orthod Dentofacial Orthop 2010;137(3):384–8.

Llamas-Carreras JM, Amarilla A, Solano E, Velasco-Ortega E, Rodriguez-Varo L, Segura-Egea JJ. Study of external root resorption during orthodontic treatment in root filled teeth compared with their contralateral teeth with vital pulps. Int Endod J 2010;43(8):654–62.

Bender IB, Byers MR, Mori K. Periapical replacement resorption of permanent, vital, endodontically treated incisors after orthodontic movement: report of two cases. J endod. 1997;23(12):768-73.

Mah R, Holland GR, Pehowich E. Periapical changes after orthodontic movement of root-filled ferret canines. J Endod 1996;22(6):298–303.

Linge L, Linge BO. Patient characteristics and treatment variables associated with apical root resorption during orthodontic treatment. Am J Orthod Dentofacial Orthop 1991;99(1):35–43.

Spurrier SW, Hall SH, Joondeph DR, Shapiro PA, Riedel RA. A comparison of apical root resorption during orthodontic treatment in endodontically treated and vital teeth. Am J Orthod Dentofacial Orthop 1990;97(2):130–4.

Yang L, Tiwari SK, Peng L. Differences in root resorption between root canal treated and contralateral vital tooth during orthodontic tooth movement: a systematic review. Orthod J Nepal 2016;6(1):41–4.

Esteves T, Ramos AL, Pereira CM, Hidalgo MM. Orthodontic root resorption of endodontically treated teeth. J Endod 2007;33(2):119–22.

Sirisoontorn I, Hotokezaka H, Hashimoto M, Gonzales C, Luppanapornlarp S, Darendeliler MA, et al. Tooth movement and root resorption; the effect of ovariectomy on orthodontic force application in rats. Angle Orthod 2011;81(4):570–7.

Sameshima GT, Sinclair PM. Predicting and preventing root resorption: part II. Treatment factors. Am J Orthod Dentofacial Orthop 2001;119(5):511–5.

McFadden WM, Engstrom C, Engstrom H, Anholm JM. A study of the relationship between incisor intrusion and root shortening. Am J Orthod Dentofacial Orthop 1989;96(5):390–6.

Liou EJW, Chang PMH. Apical root resorption in orthodontics patients with en-masse maxillary anterior retraction and intrusion with miniscrews. Am J Orthod Dentofacial Orthop 2010;137(2):207–12.

Maués CP, Nascimento RR, Vilella OD. Severe root resorption resulting from orthodontic treatment: prevalence and risk factors. Dent Press J Orthod 2015;20(1):52–8.

Motokawa M, Sasamoto T, Kaku M, Kawata T, Matsuda Y, Terao A, et al. Association between root resorption incident to orthodontic treatment and treatment factors. Euro J Orthod 2011;34(3):350–6.

Ravanmehr H, Javadein S. Changes in root lengths of maxillary incisors during orthodontic retention period. J Dent Med 2005;18(4):13–21.



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