TY - JOUR

T1 - The location of the permanent mandibular canine as identified in orthopantomograms from children younger than 5 years of age

T2 - a case series study

AU - Kjær, I.

AU - Svanholt, M.

AU - Svanholt, P.

N1 - Publisher Copyright: © 2023, The Author(s).

PY - 2023

Y1 - 2023

N2 - Aim: The aim of this case series study is to describe where the crowns of the permanent mandibular canines are located in early childhood in relation to the preceding primary canines. Materials and methods: From a sample of 31 orthopantomograms from children, younger than 5 years of age, the location of the mandibular canines was analysed by visual inspection. The radiographs were taken due to different deviations in the dentition and forwarded during a period of 28 years for elucidating different diagnostic questions. From an embryological point of view, the primary canine was considered as a stable structure in the jawbone. A longitudinal axis through the primary canine was named the canine axis. The initial site of the permanent crown was the site, where the permanent lamina “placed” the tooth bud for final development. A normal site was determined when the canine axis passed though the permanent crown and a pathological site was determined when this did not happen. Results: Normal sites for the permanent crowns were observed in 19 cases and abnormal sites in 8 cases. In four cases, the interrelationship between the canine axis and the permanent crown could not be decided. The study demonstrated that the tooth germ for the permanent canine can start initial formation misplaced distally or mesially to the preceding primary tooth. Conclusion: The study demonstrates different malpositions of the initial crowns of the permanent mandibular canines in children younger than 5 years of age. The results are considered of importance for future understanding of the aetiology behind ectopic mandibular canines.

AB - Aim: The aim of this case series study is to describe where the crowns of the permanent mandibular canines are located in early childhood in relation to the preceding primary canines. Materials and methods: From a sample of 31 orthopantomograms from children, younger than 5 years of age, the location of the mandibular canines was analysed by visual inspection. The radiographs were taken due to different deviations in the dentition and forwarded during a period of 28 years for elucidating different diagnostic questions. From an embryological point of view, the primary canine was considered as a stable structure in the jawbone. A longitudinal axis through the primary canine was named the canine axis. The initial site of the permanent crown was the site, where the permanent lamina “placed” the tooth bud for final development. A normal site was determined when the canine axis passed though the permanent crown and a pathological site was determined when this did not happen. Results: Normal sites for the permanent crowns were observed in 19 cases and abnormal sites in 8 cases. In four cases, the interrelationship between the canine axis and the permanent crown could not be decided. The study demonstrated that the tooth germ for the permanent canine can start initial formation misplaced distally or mesially to the preceding primary tooth. Conclusion: The study demonstrates different malpositions of the initial crowns of the permanent mandibular canines in children younger than 5 years of age. The results are considered of importance for future understanding of the aetiology behind ectopic mandibular canines.

KW - Eruption

KW - Mandible

KW - Orthopantomogram

KW - Permanent canine

KW - Primary dentition

U2 - 10.1007/s40368-023-00825-y

DO - 10.1007/s40368-023-00825-y

M3 - Journal article

C2 - 37615811

AN - SCOPUS:85168599211

SP - 613

EP - 619

JO - European archives of paediatric dentistry

JF - European archives of paediatric dentistry

SN - 1818-6300

ER -