Articles Vol. 67 No. 5 25/05/2026

LATERAL INCISOR CHARACTERISTICS AND THEIR ASSOCIATION WITH ROOT RESORPTION IN CASES OF UNILATERAL IMPACTED MAXILLARY CANINE ON CONE-BEAM COMPUTED TOMOGRAPHY

Ho Thi Thuy Trang1,2, Hoang Thi Thu Hien3,4, Nguyen Dinh Hung An5,6, Duong My Linh3,4
1 University of Medicine and Pharmacy at Ho Chi Minh city
2 Đại học Y Dược thành phố Hồ Chí Minh
3 Military Hospital 175
4 Bệnh viện Quân y 175
5 Pacific Dental Clinic
6 Nha khoa Pacific
DOI: 10.52163/yhc.v67i5.5187
23 Views
4 Downloads
Keywords
Impacted maxillary canine, lateral incisor, root resorption, cone-beam computed tomography.
Abstract

Objective: To evaluate related features of adjacent lateral incisors in unilateral impacted maxillary canine cases by comparing lateral incisor length between the impacted and non-impacted sides, and by examining the association of overlap severity and canine-lateral incisor distance with lateral incisor root resorption on cone-beam computed tomography.

Subjects and methods: A cross-sectional analytical study was conducted on 43 unilateral impacted maxillary canine cases assessed on cone-beam computed tomography images. Lateral incisor length was compared between the impacted side and the contralateral side in the same patient. The relationships of overlap severity and canine-lateral incisor distance with the severity of lateral incisor root resorption were analyzed using Spearman correlation.

Results: The lateral incisor on the impacted side was significantly shorter than that on the non-impacted side (21.6 ± 3.2 mm vs 22.2 ± 2.4 mm; p = 0.013). Overlap severity showed a positive correlation with root resorption severity (rho = 0.389; p = 0.010), whereas canine-lateral incisor distance showed a negative correlation with root resorption severity (rho = -0.323; p = 0.035). The canine-lateral incisor distance was significantly smaller in the resorption group than in the non-resorption group (p = 0.047).

Conclusions: In unilateral impacted maxillary canine cases, the adjacent lateral incisor may demonstrate related morphologic features, and its spatial relationship with the impacted canine is associated with root resorption. Cone-beam computed tomography may be useful for early identification of root resorption risk in adjacent teeth and for pretreatment assessment.

References
[1]
Ericson S, Kurol P.J. Resorption of maxillary lateral incisors caused by ectopic eruption of the canines: a clinical and radiographic analysis of predisposing factors. American Journal of Orthodontics and Dentofacial Orthopedics, 1988, 94 (6): 503-513. doi: 10.1016/0889-5406(88)90008-X. Google Scholar
[2]
Ericson S, Kurol P.J. Resorption of incisors after ectopic eruption of maxillary canines: a CT study. Angle Orthod, 2000, 70 (6): 415-23. doi: 10.1043/0003-3219(2000)070<0415:ROIAEE>2.0.CO;2. Google Scholar
[3]
Liu D.G, Zhang W.L, Zhang Z.Y, Wu Y.T, Ma X.C. Localization of impacted maxillary canines and observation of adjacent incisor resorption with cone-beam computed tomography. Oral Surg Oral Med Oral Pathol Oral Radiol Endod, 2008, 105 (1): 91-8. doi: 10.1016/j.tripleo.2007.01.030. Google Scholar
[4]
Alqerban A, Jacobs R, Lambrechts P, Loozen G, Willems G. Root resorption of the maxillary lateral incisor caused by impacted canine: a literature review. Clinical Oral Investigations, 2009, 13 (3): 247-255. doi: 10.1007/s00784-009-0262-8. Google Scholar
[5]
Oberoi S, Knueppel S. Three-dimensional assessment of impacted canines and root resorption using cone beam computed tomography. Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontology, 2012, 113 (2): 260-267. doi: 10.1016/j.tripleo.2011.03.035. Google Scholar
[6]
Mitsea A, Palikaraki G, Karamesinis K, Vastardis H, Gizani S, Sifakakis I. Evaluation of lateral incisor resorption caused by impacted maxillary canines based on CBCT: a systematic review and meta-analysis. Children, 2022, 9 (7): 1006. doi: 10.3390/children9071006. Google Scholar
[7]
Peralta-Mamani M et al. CBCT vs panoramic radiography in assessment of impacted upper canine and root resorption of the adjacent teeth: a systematic review and meta-analysis. Journal of Clinical and Experimental Dentistry, 2024, 16 (2): e198-e222. doi:10.4317/jced.61285. Google Scholar
[8]
Vi Thị Hồng, Trần Cao Bính. Đặc điểm hình thái răng nanh vĩnh viễn hàm trên ngầm qua phim cắt lớp vi tính chùm tia hình nón. Tạp chí Y học Việt Nam, 2021, 506 (1): 229-233. doi: 10.51298/vmj.v506i1.1209. Google Scholar
[9]
Võ Thị Thúy Hồng, Trịnh Đình Hải. Kết quả điều trị kéo răng ngầm với sự hỗ trợ của phim CBCT. Tạp chí Y học Việt Nam, 2022, 511 (1): 53-57. doi: 10.51298/vmj.v511i1.2040. Google Scholar