scholarly journals CONDUCTO ALVEOLAR INFERIOR. CORRELATO ANATOMO-IMAGENOLOGICO E IMPLICANCIA EN LOS PROCEDIMIENTOS QUIRURGICOS DE MANDIBULA. Inferior alveolar canal. Imaginological anatomical correlation and implication in jaw surgical procedures

2016 ◽  
Vol 8 (1) ◽  
pp. 18-28
Author(s):  
Andrés C Limardo ◽  
Belén De Fazio ◽  
Francisco Lezcano ◽  
Rodrigo Vallejo ◽  
Nicolás Abud ◽  
...  
Keyword(s):  
Surgical Procedures ◽  
Local Population ◽  
Inferior Alveolar Nerve ◽  
Mental Foramen ◽  
Cone Beam ◽  
Imaging Studies ◽  
Second Stage ◽  
Anatomical Correlation ◽  
Inferior Alveolar Canal ◽  
Jaw Surgery

Introducción: Las lesiones iatrogénicas del nervio dentario inferior son complicaciones documentadas de diversos procedimientos quirúrgicos en la mandíbula. Debido a ello se justifica una descripción más detallada con referencias morfométricas de dicho conducto, como así también una correlación con imágenes. Materiales y métodos: Se realizó un estudio descriptivo observacional con una muestra de 44 hemimandíbulas secas y 100 tomografías computadas de mandíbulas de pacientes al azar. Se realizaron mediciones del foramen mandibular y mentoniano con respecto a bordes mandibulares. Se hicieron cortes en la rama y el cuerpo con sus respectivas mediciones. Se utilizaron Tomografías Computadas Cone Beam 3D de 100 pacientes las cuales fueron procesadas por el programa Compudent Navigator 3D®. Utilizando este programa se pudieron realizar las mismas mediciones que en los preparados anatómicos, como así también la reconstrucción del conducto. En una segunda etapa se realizó una correlación entre los valores morfométricos del estudio anatómico y se comparó con los estudios por imágenes (TC con reconstrucción 3D Dental Scan). Resultados: Se expresaron en tablas con diversas variables. Discusión: Los textos clásicos de anatomía y los libros de cirugía de la especialidad describen en detalle el recorrido y las relaciones del CAI, y presentan datos morfométricos pero no lo hacen en poblaciones locales. Como conclusión podemos afirmar que, tomando como punto de partida la anatomía y correlacionándola con la imagenologia, podemos llegar a evitar lesiones del nervio alveolar inferior en el transcurso de diversos procedimientos realizados en la mandíbula. Introduction: Iatrogenic inferior alveolar nerve injuries are documented complications of different surgical procedures in the jaw. It should justify a more detailed description with morphometric references of the duct and a correlation with images. Materials and method: A descriptive observational study with a sample of 44 dry hemijaws and 100 CT scans of patients. Measur-ements of the mandibular foramen and mental foramen with respect to jaw edges were made. Cuts in the branch and body were made with their respective measurements. Cone Beam Computed Tomography 3D (CBCT 3D) of 100 patients were processed by the Compudent Navigator 3D® program. The use of this program permited the same measurements done in the cadaveric jaws and the reconstruction of the duct. In a second stage we performed a correlation between the anatomic morphometric values compared with imaging studies (CT Dental Scan with 3D reconstruction) Results: They were shown in tables with different variables. Discussion: The classic texts of Anatomy and surgery books describe in detail the pathway and relations of the duct, and present morphometric data but not in local population. We may conclude that it is possible to avoid injuries of the inferior alveolar nerve during jaw surgery by considering the anatomy and its correlation with images.

Prevalence and Length of the Anterior Loop of the Inferior Alveolar Nerve in Iranians

2017 ◽  
Vol 43 (5) ◽  
pp. 333-336 ◽  
Author(s):  
Maryam Rastegar Moghddam ◽  
Zeinab Davoudmanesh ◽  
Nasim Azizi ◽  
Vahid Rakhshan ◽  
Mahsa Shariati
Keyword(s):  
Anterior Part ◽  
Age Groups ◽  
Inferior Alveolar Nerve ◽  
Mental Foramen ◽  
Cone Beam ◽  
Anterior Border ◽  
Chi Square ◽  
Anterior Loop ◽  
Cone Beam Computerized Tomography ◽  
The Mean

The anterior loop of the inferior alveolar nerve is a sensitive anatomical feature that should be taken into account during installation of dental implants anterior to the mental foramen. This study was conducted to explore the controversy regarding prevalence and length. A total of 452 mandible quadrants of 234 patients (age: 50.1 ± 13.3 years, 113 males, 121 females) were studied using cone-beam computerized tomography. After reconstructing axial, frontal, and sagittal slices, the region between the most anterior point on the mental foramen and the most anterior part of the mandibular nerve was inspected for signs of anterior loop presence. If positive, the length of the anterior loop was measured in mm as the distance between the anterior border of mental foramen and the anterior border of the loop. Prevalence and length of the anterior loop were compared statistically between sexes and age groups. The anterior loop was observed in 106 quadrants (23.5% of 451 quadrants) of 95 patients (40.6% of 234 patients), of whom 11 had bilateral anterior loops. Prevalences were similar in males (41%) and females (39%, chi-square P =.791). The mean anterior loop length was 2.77 ± 1.56 mm (95% CI: 2.5–3.1 mm), without significant sex (regression beta = −0.159, P = .134) or age (beta = −0.059, P = .578) differences. The anterior loop might exist in about 40% of patients, regardless of their gender. The mean safe anterior distance from the anterior loop is about 3 mm + (2.5–3.1 mm) = 5.5–6.1 mm, regardless of age.

scholarly journals Evaluation of the bone anatomy of the anterior region of the mandible using cone beam computed tomography

2018 ◽  
Vol 47 (2) ◽  
pp. 69-73
Author(s):  
Bruna Jussara Constantino LOCKS ◽  
Marcela CLAUDINO ◽  
Luciana Reis AZEVEDO-ALANIS ◽  
Alessandra Soares DITZEL ◽  
Flávia Noemy Gasparini Kiatake FONTÃO
Keyword(s):  
Computed Tomography ◽  
Surgical Procedures ◽  
Surgical Planning ◽  
Mental Foramen ◽  
Anterior Region ◽  
Cone Beam ◽  
Type I ◽  
Lingual Foramen ◽  
Mean Diameter ◽  
Cone Beam Computerized Tomography

Abstract Background Hemorrhages, mouth floor edema and tongue elevation are complications related to surgical procedures in the anterior region of the mandible. Objective The objectives of this study were to evaluate the presence and location of the lingual foramen in the anterior region of the mandible and to evaluate mandibular morphology using cone beam computerized tomography (CBCT). Material and method The mandible’s morphology and the location, diameter and height of the lingual foramina were analyzed using the midline and the mental foramen as references, in 278 CBCT. Result 88% of the sample had a midline lingual foramen, totaling 408 foramina, with a mean diameter of 0.93 mm. Foramina in the lingual region between the midline and mental foramina were detected in 75% of the sample, with a mean diameter of 0.807 mm. There was no positive correlation between the presence of lingual foramina in the lateral or in the midline regions (r = -0.149; p = 0.013). In the midline region, the type I mandibular shape was predominant (96%), and type III was predominant in the lateral regions. Conclusion Considering the prevalence of these structures and their clinical relevance in potential surgical complications, it is important to carefully analyze the anterior region of the mandible during surgical planning.

Assessment of the Anterior Loop of the Mental Nerve Using Cone Beam Computerized Tomography Scan

2015 ◽  
Vol 41 (6) ◽  
pp. 632-639 ◽  
Author(s):  
Chun-I Lu ◽  
John Won ◽  
Aladdin Al-Ardah ◽  
Ruben Santana ◽  
Dwight Rice ◽  
...  
Keyword(s):  
Computerized Tomography ◽  
Age Groups ◽  
Inferior Alveolar Nerve ◽  
Mental Foramen ◽  
Cone Beam ◽  
Mental Nerve ◽  
Anterior Loop ◽  
Significant Difference ◽  
Cone Beam Computerized Tomography ◽  
The Mean

The purpose of this study is to use cone-beam computerized tomography (CBCT) scans with oblique-transverse reconstruction modality to measure and compare the anterior loop length (AnLL) of the mental nerve between gender and age groups and to compare the difference between the right and left sides. Sixty-one female and 61 male CBCT scans were randomly selected for each age group: 21–40, 41–60, and 61–80 years. Both right- and left-side AnLLs were measured in each subject using i-CATVision software to measure AnLLs on the oblique transverse plane using multiplanar reconstruction. The anterior loop was identified in 85.2% of cases, with the mean AnLL of the 366 subjects (732 hemimandibles) being 1.46 ± 1.25 mm with no statistically significant difference between right and left sides or between different gender groups. However, the mean AnLL in the 21–40 year group (1.89 ± 1.35 mm) was larger than the AnLL in the 41–60 year group (1.35 ± 1.19 mm) and the 61–80 year group (1.13 ± 1.08 mm). In conclusion, when placing implants in close proximity to mental foramina, caution is recommended to avoid injury to the inferior alveolar nerve. No fixed distance anteriorly from the mental foramen should be considered safe. Using CBCT scans with the oblique-transverse method to accurately identify and measure the AnLL is of utmost importance in avoiding and protecting its integrity.

scholarly journals Assessment Of Prevalence, Length And Position Of Anterior Loop Of Inferior Alveolar Nerve: A Study Using CBCT

2017 ◽  
Vol 16 (2) ◽  
Author(s):  
Haszelini Hassan ◽  
Hikmah Mohd Nor ◽  
Nur Athiah Shaberi ◽  
Nur Aqila Syaqina Zuber ◽  
Nur Hasnaa Hishamudin
Keyword(s):  
Anatomical Variation ◽  
Inferior Alveolar Nerve ◽  
Mental Foramen ◽  
Cone Beam ◽  
Implant Placement ◽  
Anterior Loop ◽  
Single Detector ◽  
The Mean ◽  
The Right ◽  
Mandibular Surgery

Introduction: Adequate space is required in the interforaminal region for anterior mandibular surgery, where the anterior loop is located within this region. The aim of this study is to evaluate the prevalence of the anterior loop (AL) of the inferior alveolar nerve, and to measure its length and position in patients attending Kulliyyah of Dentistry using cone beam computed tomography (CBCT). Materials and Methods: CBCT images of mandibles from 70 patients (140 hemimandibles) were selected and evaluated in this retrospective study. A single detector, multiple slits CBCT machine was used for this purpose. The comparison was made based on gender, age and race. The prevalence, position and length of the AL were assessed using Romexis® software version 2.8.0.R. Results: An anterior loop was identified in 16.4% of the examined mandibles and mostly observed on the right side (21.4%). The prevalence of AL was significantly higher in males (69.6%) compared to females (30.4%). The mean anterior loop length recorded was 2.59 mm (± 1.63), ranged from 0.80 mm to 6.00 mm. Most of the loops were found located inferior to the apex of lower right second premolars (60%). Conclusion(s): In this study, the prevalence of AL found is significant and the length of AL was varied greatly. Although AL is an anatomical variation, findings of this study might be useful in determining the safe distance and to preserve the neurovascular bundle before an implant placement or osteotomy in the anterior region of mental foramen.

scholarly journals Radiomorphometric Localization of Mental Foramen and Mandibular Canal using Cone Beam Computed Tomography as an Aid to Gender Determination- A Retrospective Study

2018 ◽  
Vol 2 (5) ◽  
pp. 115-120 ◽  
Author(s):  
Mansimranjit Kaur Uppal ◽  
Asha Raghunandan Iyengar ◽  
Seema Patil ◽  
Subash Bailoor Vausdev ◽  
Ramya Madhuri Kotni ◽  
...  
Keyword(s):  
Mandibular Canal ◽  
Mental Foramen ◽  
Observer Agreement ◽  
Cone Beam ◽  
Gender Determination ◽  
Significant Difference ◽  
Inferior Alveolar Canal ◽  
The Mean ◽  
The Right

AIM: The present study aimed at evaluating the role of mental foramen and mandibular canal in gender determination using CBCT.METHODOLOGY: A total number of 73 volumes of CBCT of the mandible was evaluated. Four measurements were used to assess the bucco-lingual and supero-inferior location of mandibular canal and the supero-inferior location of mental foramen was determined using two measurements on both right and left sides of the mandible. Inter and intra-observer variability was analyzed with help of t-test.RESULTS: Good intra-observer and inter-observer agreement was noted with regard to all the six measurements. The mean of all the measurements of mental nerve foramen and mandibular canal was found to be higher in males than females, however, significant difference was noted with regard to Superior Mental foramen (SMeF) and Superior Inferior Alveolar Canal (SMC) (p=0.037, p<0.001 respectively) on the right side and SIAC and Inferior Inferior Alveolar Canal (IIAC), (p=0.015, p=0.046 respectively) on the left side.CONCLUSION: The results of the present study suggest that SMeF, SIAC and IIAC may be used for gender determination. Further, either side of mandible can be used for this purpose. CBCT was found to be a useful modality in this study for sexual dimorphism.

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