Crown and root morphological characteristics of impacted maxillary central incisor: A retrospective study.

Document Type : Original Article

Authors

1 Lecturer, Department of Orthodontics, Faculty of Dentistry, Suez Canal University, Egypt.

2 Professor, Department of Oral Radiology, Faculty of Dentistry, Beni-Suef University, Egypt.

3 Lecturer, Department of Orthodontics, Faculty of Dentistry, Beni-Suef University, Egypt.

Abstract

Aim: The aim of the current study was to evaluate the crown and root morphology of the unilateral impacted central incisor in comparison to the contralateral central incisor using CBCT.
Material and method: CBCT scans of 60 patients were collected and imported into OnDemand 3D Dental software (Cybermed Inc., Seoul). The localization of the impacted maxillary central incisor and the presence of rotations or root dilaceration were reported. The crown length, root length, root canal width, apical foramen width, and root-crown angulation of the impacted and homonym teeth were measured.
Results: 80% of the impacted maxillary central incisors were in labial position. Dilacerations were present in only 16.7 % of the impacted maxillary central incisors. The root lengths of the central incisors on the impacted side were significantly shorter than their homonyms. The root canal widths of the teeth on the impacted side were significantly narrower, and the apical foramen widths of the impacted central incisors were significantly greater. The root-crown root angulation was shown to be significantly greater for the homonym teeth. The inclination of the impacted teeth to the palatal plane was significantly less than that of the contralateral teeth.
Conclusion: Labially impacted maxillary central incisors are more common. Impaction had a negative impact on the root length, development, root canal width, and root-crown angulation. This study highlighted the importance of early diagnosis of the impaction of maxillary central incisors and the primordial role of CBCT in the assessment of the impacted teeth.

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Egyptian Dental Journal
Volume 71, Issue 4 - Serial Number 1
October (Orthodontics, Pediatric & Preventive Dentistry)
October 2025
Pages 2875-2884

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