Prevalence of impacted canine among Yemen population in Sanaâ€™a city
Keywords:Canine Impaction, Distoangular Impaction, Prevalence, Mesioangular Impaction
Objective: Impacted maxillary and mandibular canine is a frequently encountered clinical problem. The objective of the present study was to determine the prevalence of impacted canine in patients visiting an Orthodontic Clinic in Sana'a city, Yemen.
Materials and methods: Patients were examined in order to detect the impacted canines by radiographs. This study comprises data from randomly selected 5287 patients. Panoramic radiographs of 5287 were selected irrespective of sex, caste, nutritional and socio-economic status Angulation and depth of impacted canine were also assessed.
Results: Out of 5287 surveyed subjects, 188 patients (3.55%) were determined to have canine impactions of whom 123 female and 65 male (Chiâ€‘square = 18.667, df = 1, P = 0.00001). Of those determined with canine impaction, 168 presents with impacted maxillary canines, 8 presents with the impacted mandibular canine and 12 present with impacted canine in both maxillary and mandibular arch. The difference was statistically significant (Chiâ€‘square = 157.362, df = 1, P = 0.0000). 138 subjects present with unilateral impaction, while the rest of the sample (50 subjects) present with bilateral impaction. Mesioangular impaction was found in 137subjects (68.5 %) and only 3 subjects (1.5 %) demonstrated distoangular impaction.
Conclusion: Based on the study results, the canine impaction was reported in (3.55%) of Yemeni population included in the survey. Most of the canine impaction occurs in maxillary arch being more prevalent in female and unilateral in mesioangular direction.
 Bishara SE, Kommer BD, Mc.Neil MH, Montgano LN, Young quist HW (1976). Management of impacted canines. Am J Orthod; 69: 371-387. https://doi.org/10.1016/0002-9416(76)90207-4.
 Dewell BF (1949). The upper cusped: its development and impaction. Angle Orthod; 19: 79-90.
 Wheeler RC (1974). Dental anatomy, physiology and occlusion. WB Saunders Co,P 23.
 Tulley WJ, Cryer BS (1969). Orthodontic treatment for the adults. Chapter 1, John Wright and Sons Ltd, Bristol.
 Foster, TD (1975). A Textbook of orthodontics. Blackwell Scientific Publications, London.
 Kinaan BK (1981). Quantitative assessment of the occlusal features. Brit J Orthod; 8: 149-56. https://doi.org/10.1179/bjo.8.3.149.
 Kinaan BK. The problem of malocclusion in Iraq (1982). Iraqi Dent J; 9: 24-8.
 Mitcheel L, Carter NE (2000). An introduction to orthodontics. Oxford University Press.
 Yavuz MS, Aras MH, BÃ¼yÃ¼kkurt MC, Tozoglu S (2008). Impacted Mandibular Canines. J Contemp Dent Pract (8)7:078-085.
 Al-Zubair NM (2015). Determinants Factors of Yemeni Maxillary Arch Dimensions, Saudi Dental Journal; 27: 50-54. https://doi.org/10.1016/j.sdentj.2014.08.005.
 Dachi SF, Howell FV (1961). A survey of 3,874 routine full-mouth radiographs: II. A study of impacted teeth. Oral Surg Oral Med Oral Pathol; 14:1165-9. https://doi.org/10.1016/0030-4220(61)90204-3.
 Jacoby H (1979). The â€œBalista springâ€ system for impacted teeth. Am J Orthod;75: 143-51. https://doi.org/10.1016/0002-9416(79)90183-0.
 Ericson S, Kurol J (1986). Radiographic assessment of maxillary canine eruption in children with clinical signs of eruption disturbances. Eur J Orthod;8: 133-40. https://doi.org/10.1093/ejo/8.3.133.
 Thilander B, Myberg N (1973). The prevalence of malocclusion in Swedish school children. Scand J Dent Res; 81:12-20.
 Adrian Becker (1998), The Orthodontic Treatment of Impacted Teeth (Ed2), published by Martin Dunitz Ltd.
 Zhong YL, Zeng XL, Jia QL, Zhang WL, Chen L (2006). Clinical investigation of impacted maxillary canine. Zhonghua Kou Qiang Yi Xue Za Zhi; 41:483-5.
 Bishara SE. Impacted maxillary canines: a review (1992). Am J Orthod Dentofacial Orthop;101: 159-71. https://doi.org/10.1016/0889-5406(92)70008-X.
 Brin I, Becker A, Zilberman Y (1993). Resorbed lateral incisors adjacent to impacted canines have normal crown size. Am J Orthod Dentofacial Orthop;104: 60-6. https://doi.org/10.1016/0889-5406(93)70028-M.
 Rimes RJ, Mitchell CN, Willmot DR (1997). Maxillary incisor root resorption in relation to the ectopic canine: a review of 26 patients. Eur J Orthod; 19:79-84. https://doi.org/10.1093/ejo/19.1.79.
 Elefteriadis JN, Athanasiou AE (1996). Evaluation of impacted canines by means of computerized tomography. Int J Adult Orthod Orthog Surg;11:257-64.
 Ericson S, Kurol J (1987). Radiographic examination of ectopically erupting maxillary canines. Am J Orthod Dentofacial Orthop; 91:483-92. https://doi.org/10.1016/0889-5406(87)90005-9.
 Alqerban A, Jacobs R, Souza PC, Willems G (2009). In-vitro comparison of 2 cone-beam computed tomography systems and panoramic imaging for detecting simulated canine impaction-induced external root resorption in maxillary lateral incisors. Am J Orthod Dentofacial Orthop; 136:764 -5. https://doi.org/10.1016/j.ajodo.2009.08.002.
 Oliver RG, Mannion JE, Robinson JM (1989). Morphology of the maxillary lateral incisor in cases of unilateral impaction of the maxillary canine. Br J Orthod;16:9-16. https://doi.org/10.1179/bjo.16.1.9.
 Chung D, Weisberg M, Pagala M (2011). Incidence and effects of genetic factors on canine impaction in an isolated Jewish population. Am J Orthod Dentofacial Orthop;139:331-335 https://doi.org/10.1016/j.ajodo.2010.06.023.
 Ryan FS, Batra P, Witherow H, Calvert M (2005). Transmigration of a maxillary canine. A case report. Prim Dent Care; 12: 70-72. https://doi.org/10.1308/1355761053695121.
 Brown LH, Berkman S, Cohen D, Kaplan AL, Rosenberg M (1982). A radiological study of the frequency and distribution of impacted teeth. J Dent Assoc S Afr; 37: 627-630.
 Shah RM, Boyd MA, Vakil TF (1978). Studies of permanent tooth anomalies in 7,886 Canadian individuals. I: impacted teeth. Dent J; 44: 262-264.
 Power SM, Short MB (1993). An investigation into the response of palatally displaced canines to the removal of deciduous canines. Br J Orthod; 20:215-23. https://doi.org/10.1179/bjo.20.3.215.
 Ericson S, Kurol J (1987). Incisor resorption caused by maxillary cuspids: a radiographic study. Angle Orthod; 57:332â€“346.