An Accessory Mental Foramen: A Case Report

2008 ◽  
Vol 9 (1) ◽  
pp. 98-104 ◽  
Author(s):  
Leyla Berna Çağirankaya ◽  
Hilmi Kansu

Abstract Aim The aim of this article is to present a case of an accessory mental foramen (AMF). Background The mental foramen is an important anatomical structure of particular importance in local anesthesia and surgical procedures in terms of achieving effective mandibular nerve blocks and avoiding injuries to the neurovascular bundles. Although rare, multiple mental foramina have been described in humans. In these cases one foramen is termed the mental foramen and the others are referred to as an AMF. Report A 62-year-old woman presented for a routine dental examination. In addition to the normal radiographic image of the mental foramen, periapical radiographs of the left mandibular premolar and molar region revealed a round-shaped radiolucency with distinct borders along with an inferior extension below the apex of the mesial root of the first molar. This image was considered to be an AMF. Summary Although no surgical operation was planned, the patient was informed about the existence and importance of the anatomical variation with regard to the need for local anesthesia, diagnosis of periapical disease, and the prevention of nerve damage during surgery in that area of the mandible. Citation Çağirankaya LB, Kansu HK. An Accessory Mental Foramen: A Case Report. J Contemp Dent Pract 2008 January; (9)1:098-104.

2017 ◽  
Vol 6 (2) ◽  
pp. 90-92
Author(s):  
Md Humalun Kabir ◽  
Parimal Chandra Mallick ◽  
AFM Sarwar ◽  
Hasan Mohammad Rizvi

The object of this study is to present a case of an accessory mental foramen. Detection of the position of mental foramen is important during surgical procedures in terms of achieving effective mandibular nerve blocks and avoiding injuries to the neurovascular bundles. A 64-year-o1d man visited us for taking treatment. Preoperative panoramic radiography and CT were conducted. A multi-section reconstructed sagittal image showed two mental foramina leading to the mandibular canal on the right side of the mandible, which were considered to be double mental foramina. Although no surgical procedure was planned, the patient was informed about the existence and importance of the anatomical variation with regard to the need for local anesthesia, diagnosis of periapical diseases, and the prevention of nerve damage during surgery in that area of his mandibleJ Shaheed Suhrawardy Med Coll, 2014; 6(2):90-92


2016 ◽  
Vol 8 (3) ◽  
pp. 151-156
Author(s):  
Javier Elías Fernández

El foramen mentoniano accesorio es un orificio adicional al foramen mentoniano que se localiza en la cara anterolateral externa del cuerpo mandibular y que se conecta con el conducto dentario inferior.  Su ubicación es posteroinferior al foramen mentoniano.  De acuerdo a su clasificación también se lo conoce como foramen mental doble, foramen mental adicional, foramen mental múltiple, foramen mental accesorio o foramen mandibular bucal suplementario. Su frecuencia de aparición varía del 1% al 10 %, cuando son unilaterales y del 0,47% al 1,2% cuando son bilaterales.  El  foramen mentoniano accesorio es una rara variante anatómica de poca frecuencia pero de gran relevancia clínico-quirúrgica ya que está asociado a un paquete vasculonervioso por lo cual es necesario su diagnóstico radiográfico ya sea por métodos convencionales o por alta resolución para evitar posibles complicaciones en los diferentes procedimientos odontológicos. Se presenta un caso de foramen mentoniano accesorio de un paciente remitido al Servicio de Radiología de la Facultad de Odontología de la UNC. La tomografía computada constituye el estudio por imágenes de excelencia ante la presunción de un foramen accesorio ya que los diferentes cortes tomográficos y la reconstrucción 3D nos permiten localizarlo de manera precisa e inequívoca. Constituye generalmente un hallazgo radiográfico o se observa durante procedimientos quirúrgicos al quedar al descubierto por el desplazamiento de los tejidos blandos. Cuando se localiza antes de cualquier procedimiento odontológico se deben tomar todos los recaudos necesarios para evitar daño del paquete vasculonervioso y futuras complicaciones como hemorragias o parestesias, principalmente en prácticas como la colocación de implantes dentales o las apicectomías. Accessory mental foramen (AMF) is defined as any openings in addition to mental foramen, with connection to the mandibular canal in the anterolateral aspect of mandible. According to its classification, an AMF is known as double mental foramen, additional mental foramen, multiple mental foramen, supplementary mandibular buccal foramen. The accessory mental foramen is a radiological finding or is detected during surgical procedures. Its prevalence ranges from 1.4 to 10% when it is unilateral and ranges from 0,47% to 1,2% when it is bilateral. Accessory mental foramen is an important and rare anatomical variation associated with a neurovascular bundle. Its prevalence is low. The diagnosis by conventional radiological methods or three-dimensional radiographic imaging techniques is effective to avoid complications in dental procedures. An accessory mental foramen case of a male patient referred to the Department of Radiology at the National University of Córdoba School of Dentistry is reported. The computed tomography is the most accurate imaging modality for the identification of an accessory foramen through multiplanar reformatted images and three dimensional images. When the existence of AMF is identified before dental procedures, appropriate actions should be taken to avoid damages of the neurovascular bundle and eventual complications such as hemorrhage and paresthesia principally in procedures like dental implant insertion or periapical surgery.


2019 ◽  
Vol 2019 ◽  
pp. 1-11
Author(s):  
Balakrishnan Subramanian ◽  
Severine N. Anthony ◽  
Lumamba Mubbunu ◽  
Chitinti Hachombwa ◽  
Majuto S. Mlawa ◽  
...  

The mental foramen (MF) and accessory mental foramen (AMF) are the strategically important landmarks during surgical interventions and anaesthetic nerve blocks procedures involving the mental nerve. The study aimed at evaluating anthropometrics of MF and AMF in Zambian adult human mandibles and it was cleared for ethics from TDRC Ethics Review Committee (Reg. No.: 00002911; FWA: 00003729). A total of 33 Zambian adult human mandibles were evaluated for shape, position, and direction of opening of foramen. All measurements were performed using a Digital Vernier Calliper and statistically analysed for per cent frequency and mean and standard deviations, and we performed the one sample t-test for comparative analysis. Data were considered significant at p<0.05. All mandibles that were examined had bilateral MF while unilateral AMF was found in two mandibles (6%). The foramens were mostly oval in shape and their most common position was between the second premolar and first molar and the most common orientation was posterior-superior. The comparative analysis of mandibular anthropometrics showed significant variations (p<0.05) with different ethnic groups. The findings emphasize the ethnic variations and edify that the foramen position is not always as stated in reference textbooks. The clinical creditability of the study is cautioning the surgeons on possible variations of the MF and AMF anthropometrics compared to existing literature in order to avoid any unforeseen injury related to anaesthesia or dental surgeries. Further studies with large sample sizes representing whole country are recommended to establish the standard MF and AMF anthropometrics of Zambian population.


2021 ◽  
Vol 2021 ◽  
pp. 1-4
Author(s):  
Zülfikar Karabıyık ◽  
Mustafa Kıranatlı

Aim. Accessory mental foramen (AMF) is a not common anatomical variation. During the surgical procedures involving the mandible such as implant surgery, periapical surgery, jaw surgeries, and periapical surgery and enucleation of pathologies at the mental region, obvious attention should be given to prevent postoperative sequelae. Case Report. Orthopantomograph (OPG) is routinely taken to visualize the maxillofacial region at a dental clinic. OPG shows exactly upper and lower jaw and teeth but superficially reveals some pathology or anatomic variation. It misses sometimes an anatomic landmark such as AMF. As the surgery is planned to a maxillofacial region, a detailed knowledge should be known before going into surgery to not interfere with anatomic landmarks. A 52-year-old male patient was referred to Kütahya Health Science University Dental Hospital, Turkey, to rehabilitate his bilateral partial edentulous lower jaw region. Implant surgery was planned in our patient. OPG was taken to evaluate the maxillofacial region but was unremarkable. Before the implant surgery, CBCT was obtained from our patient. CBCT and a three-dimensional reconstructed model of the male patient showed bilateral accessory mental foramen (AMF). Conclusion. Accessory mental foramen (AMF) carries additional innervation to the chin, mandibular anterior gingiva, and mental region. Reflection and protection of the AMF during the surgery can prevent hemorrhage and neurosensory disturbance at the mental region and can improve quality of life for the patient. CBCT has higher precision but also a higher price and radiation dose. Although anatomical variations are uncommon, they can be found on digital panoramic radiographs but in limited percentage.


2010 ◽  
Vol 52 (3) ◽  
pp. 501-503 ◽  
Author(s):  
Frederico S. Neves ◽  
Marianna G. G. Torres ◽  
Christiano Oliveira ◽  
Paulo S. F. Campos ◽  
Iêda Crusoé-Rebello

2015 ◽  
Vol 45 (1) ◽  
pp. 61 ◽  
Author(s):  
Marianna Guanaes Gomes Torres ◽  
Ludmila de Faro Valverde ◽  
Manuela Torres Andion Vidal ◽  
Iêda Margarida Crusoé-Rebello

Morphologie ◽  
2021 ◽  
Author(s):  
G. Cançado de Morais Ribeiro ◽  
J. Damaceno Emiliano ◽  
Á. Campolina Fonseca ◽  
L. de Oliveira Botelho ◽  
L. Couto Castro ◽  
...  

2021 ◽  
Vol 3 ◽  
pp. 67-69
Author(s):  
Shalini Agarwal ◽  
Jyoti Siwach ◽  
Ramneet Wadi ◽  
Nipun Gupta

We report a case of a 55-year-old male patient who presented with swelling over his right elbow of 5-year duration. An ultrasound examination revealed an echogenic mass within the olecranon bursa. On magnetic resonance imaging, the mass revealed the signal intensity of fat, and it was attached to the bursal lining by means of a pedicle. There was no restriction on diffusion-weighted images and no significant contrast enhancement. Excision was performed under local anesthesia. The excised specimen revealed mature fat cells on histopathology.


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