A cone-beam computed tomography study to assess anterior loop and other anatomic variations in mental foramen area in an Iranian population
Purpose: This study aimed to determine the prevalence and length of the anterior loop (AL) of the inferior alveolar nerve, and evaluate the emergence direction of the mental nerve and the location of mental foramen in a group of Iranian patients. Material and Methods: This study was carried out on...
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| Format: | Article |
| Language: | English |
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Universidad de Concepción.
2022-02-01
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| Series: | Journal of Oral Research |
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| Online Access: | https://www.joralres.com/index.php/JOralRes/article/view/joralres.2022.004/1027 |
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| author | Leila Khojastepour Sahar Assar Najmeh Movahhedian Mohammad Mahjoori-ghasrodashti Farzaneh Ahrari |
| author_facet | Leila Khojastepour Sahar Assar Najmeh Movahhedian Mohammad Mahjoori-ghasrodashti Farzaneh Ahrari |
| author_sort | Leila Khojastepour |
| collection | DOAJ |
| description | Purpose: This study aimed to determine the prevalence and length of the anterior loop (AL) of the inferior alveolar nerve, and evaluate the emergence direction of the mental nerve and the location of mental foramen in a group of Iranian patients.
Material and Methods: This study was carried out on CBCT scans of 150 patients (57 males and 93 females; mean age 40.8 ±14.33 years). The presence and extent of the AL was determined in reconstructed images. The emergence path of the mental nerve was classified into three groups: anteriorly directed emergence, right-angled pattern of emergence, and posteriorly directed emergence. The location of mental foramen relative to adjacent premolars was determined.
Results: AL was identified in 14.7% of the cases with a mean length of 1.39± 0.91 mm (range 0.25 to 3.50 mm). No significant differences were observed in the prevalence and extent of the AL between genders (p>0.05). The right-angled pattern of emergence was more dominant (43.7%). The most prevalent location of mental foramen was between the first and second premolars (68.3%). There was no significant association between the presence of AL with the path of emergence of the mental nerve (p=0.627) or the location of the mental foramen (p=0.100).
Conclusion: The prevalence of anterior loop was relatively low in the present sample (14.7%) with a length range of 0.25 to 3.5 mm. Due to the importance of this anatomic variation in implant surgery, it is suggested to carefully assess CBCT images before the surgical procedure to avoid neurosensory complications. |
| first_indexed | 2024-04-11T14:55:46Z |
| format | Article |
| id | doaj.art-1d69c507e14d497c820e3fd0b817e65b |
| institution | Directory Open Access Journal |
| issn | 0719-2460 0719-2479 |
| language | English |
| last_indexed | 2024-04-11T14:55:46Z |
| publishDate | 2022-02-01 |
| publisher | Universidad de Concepción. |
| record_format | Article |
| series | Journal of Oral Research |
| spelling | doaj.art-1d69c507e14d497c820e3fd0b817e65b2022-12-22T04:17:15ZengUniversidad de Concepción.Journal of Oral Research0719-24600719-24792022-02-01111114https://doi.org/10.17126/joralres.2022.004A cone-beam computed tomography study to assess anterior loop and other anatomic variations in mental foramen area in an Iranian populationLeila Khojastepour0Sahar Assar1Najmeh Movahhedian2Mohammad Mahjoori-ghasrodashti3Farzaneh Ahrari4Department of Oral and Maxillofacial Radiology, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.Student Research Committee, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.Department of Oral and Maxillofacial Radiology, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.Eastman Institute for Oral Health, Rochester, United States.Dental Research Center, School of Den-tistry, Mashhad University of Medical Sciences, Mashhad, Iran.Purpose: This study aimed to determine the prevalence and length of the anterior loop (AL) of the inferior alveolar nerve, and evaluate the emergence direction of the mental nerve and the location of mental foramen in a group of Iranian patients. Material and Methods: This study was carried out on CBCT scans of 150 patients (57 males and 93 females; mean age 40.8 ±14.33 years). The presence and extent of the AL was determined in reconstructed images. The emergence path of the mental nerve was classified into three groups: anteriorly directed emergence, right-angled pattern of emergence, and posteriorly directed emergence. The location of mental foramen relative to adjacent premolars was determined. Results: AL was identified in 14.7% of the cases with a mean length of 1.39± 0.91 mm (range 0.25 to 3.50 mm). No significant differences were observed in the prevalence and extent of the AL between genders (p>0.05). The right-angled pattern of emergence was more dominant (43.7%). The most prevalent location of mental foramen was between the first and second premolars (68.3%). There was no significant association between the presence of AL with the path of emergence of the mental nerve (p=0.627) or the location of the mental foramen (p=0.100). Conclusion: The prevalence of anterior loop was relatively low in the present sample (14.7%) with a length range of 0.25 to 3.5 mm. Due to the importance of this anatomic variation in implant surgery, it is suggested to carefully assess CBCT images before the surgical procedure to avoid neurosensory complications.https://www.joralres.com/index.php/JOralRes/article/view/joralres.2022.004/1027cone-beam computed tomographydental implantsmental foramenmandibular nervemandibleprevalence |
| spellingShingle | Leila Khojastepour Sahar Assar Najmeh Movahhedian Mohammad Mahjoori-ghasrodashti Farzaneh Ahrari A cone-beam computed tomography study to assess anterior loop and other anatomic variations in mental foramen area in an Iranian population Journal of Oral Research cone-beam computed tomography dental implants mental foramen mandibular nerve mandible prevalence |
| title | A cone-beam computed tomography study to assess anterior loop and other anatomic variations in mental foramen area in an Iranian population |
| title_full | A cone-beam computed tomography study to assess anterior loop and other anatomic variations in mental foramen area in an Iranian population |
| title_fullStr | A cone-beam computed tomography study to assess anterior loop and other anatomic variations in mental foramen area in an Iranian population |
| title_full_unstemmed | A cone-beam computed tomography study to assess anterior loop and other anatomic variations in mental foramen area in an Iranian population |
| title_short | A cone-beam computed tomography study to assess anterior loop and other anatomic variations in mental foramen area in an Iranian population |
| title_sort | cone beam computed tomography study to assess anterior loop and other anatomic variations in mental foramen area in an iranian population |
| topic | cone-beam computed tomography dental implants mental foramen mandibular nerve mandible prevalence |
| url | https://www.joralres.com/index.php/JOralRes/article/view/joralres.2022.004/1027 |
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