Clinical and imaging analysis of 22 cases of supernumerary teeth in the mandibular region - 27/10/23

Doi : 10.1016/j.jormas.2023.101525

Lingnan Hou ^a,^b,^c,^{^{#
These authors contributed equally to this work.}}, Kiran Acharya ^a,^b,^c,^{^{#
These authors contributed equally to this work.}}, Bedana Ghimire ^e, Dinesh Kasula ^d, Ishfa Banu Haque ^f, Narayan Sharma Lamichhane ^g, Lifeng Li ^a,^b,^c,^⁎,^{^{#
These authors contributed equally to this work.}} , Xiao Yi Hu ^a,^b,^c,^{^{#
These authors contributed equally to this work.}}
^a Key laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, China
^b Clinical Research Center of Shaanxi Province for Dental and Maxillofacial Diseases, College of Stomatology, Xi'an Jiaotong University, China
^c Department of Cranio-Maxillofacial Trauma and Plastic Surgery, College of Stomatology, Xi'an Jiaotong University, China
^d Department of Endodontics and preventive dentistry College of Stomatology, Xi'an Jiaotong University
^e Shree Birendera Sainik (Army Hospital) Kathmandu, Nepal
^f Department of Maxillofacial Surgery National Academy of Medical Science (NAMS) Bir Hospital Kathmandu, Nepal
^g Department of Maxillofacial Surgery Western Regional Hospital Pokhara, Nepal

^⁎Corresponding author.

En prensa. Pruebas corregidas por el autor. Disponible en línea desde el Friday 27 October 2023

Abstract

Purpose

This study aimed to describe clinical and imaging analysis of supernumerary teeth in the mandibular region of 22 cases.

Study design

Retrospective study.

Methods

This study enrolled patients diagnosed with supernumerary teeth who underwent cone beam computed tomography (CBCT) at Stomatology Hospital of Xi'an Jiaotong University from August 2016 to September 2022. Participants included individuals aged 7-29 years of both genders. The following variables were examined: number of supernumerary teeth, location, shape, direction, length, relationship with adjacent teeth and surrounding anatomical structures, and secondary effects.

Results

Out of 236 subjects, 22 (6.02%) were found to have supernumerary teeth in the mandibular region, with a total of 62 teeth identified. The male-to-female ratio was 5:6. Most supernumerary teeth were located in the lingual side of the mandibular region, particularly in the 34-35 tooth area (21.66%), followed by the 44-45 tooth region. The vast majority of supernumerary teeth (96.77%) were impacted, and more than half (51.67%) were located near the mental nerve canal. The average length of the supernumerary teeth was 10.5 mm. While no primary complications were observed, some secondary symptoms were noted, such as the ectopic eruption of adjacent teeth and crowding of permanent teeth.

Conclusion

The supernumerary teeth in the mandibular area have regional characteristics, which can provide for clinical diagnosis and treatment. CBCT can accurately analyze the location of supernumerary teeth and their secondary effects, and provides the treatment plan on that basis.

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Keywords : Supernumerary teeth, Lingual side, Cone beam computed tomography, Mental canal, Ectopic eruption