Clinical aspects of the anatomical correlation between mandibular canal, inferior third molar and sensitive alterations of the inferior alveolar nerve

2019 ◽  
Vol 48 ◽  
pp. 61
Author(s):  
B. Dezen Vieira ◽  
L.E. Santos Tavares Farias ◽  
M. Mercadante Santana Cruz ◽  
B. Ferreira Brasileiro
Keyword(s):  
Inferior Alveolar Nerve ◽  
Third Molar ◽  
Mandibular Canal ◽  
Clinical Aspects ◽  
Anatomical Correlation

scholarly journals Evaluation of the Relationship between Mandibular Third Molar and Mandibular Canal by Different Algorithms of Cone-beam Computed Tomography

2014 ◽  
Vol 15 (6) ◽  
pp. 740-745
Author(s):  
Mojdeh Mehdizadeh ◽  
Navid Ahmadi ◽  
Mahsa Jamshidi
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Inferior Alveolar Nerve ◽  
Third Molar ◽  
Mandibular Canal ◽  
Cross Sectional Study ◽  
Cone Beam ◽  
Cross Sectional ◽  
Mandibular Third Molar ◽  
The Relationship

ABSTRACT Objectives Exact location of the inferior alveolar nerve (IAN) bundle is very important. The aim of this study is to evaluate the relationship between the mandibular third molar and the mandibular canal by cone-beam computed tomography. Study design This was a cross-sectional study with convenience sampling. 94 mandibular CBCTs performed with CSANEX 3D machine (Soredex, Finland) and 3D system chosen. Vertical and horizontal relationship between the mandibular canal and the third molar depicted by 3D, panoramic reformat view of CBCT and cross-sectional view. Cross-sectional view was our gold standard and other view evaluated by it. Results There were significant differences between the vertical and horizontal relation of nerve and tooth in all views (p < 0.001). Conclusion The results showed differences in the position of the inferior alveolar nerve with different views of CBCT, so CBCT images are not quite reliable and have possibility of error. How to cite this article Mehdizadeh M, Ahmadi N, Jamshidi M. Evaluation of the Relationship between Mandibular Third Molar and Mandibular Canal by Different Algorithms of Cone-beam Computed Tomography. J Contemp Dent Pract 2014;15(6):740-745.

scholarly journals The elusive retromolar foramen and retromolar canal: A CBCT study

2021 ◽  
Vol 7 (3) ◽  
pp. 118-124
Author(s):  
Vijeta Pannalal ◽  
Abhijeet Deoghare ◽  
Chinar Fating ◽  
Satyendra Jha
Keyword(s):  
Single Case ◽  
Inferior Alveolar Nerve ◽  
Third Molar ◽  
Subjective Assessment ◽  
Mandibular Canal ◽  
Chi Square ◽  
Retromolar Foramen ◽  
Chi Square Test ◽  
Observational Descriptive Study ◽  
Retromolar Canal

This study aims to evaluate the presence of retromolar foramen (RMF) and retromolar canal (RMC) in the mandible using cone beam computed tomography (CBCT) in Chhattishgarh population and to correlate its possible clinical impact. 175 CBCT images were collected from which 100 bilateral CBCT images of patients were retrospectively selected from the Department of Oral Medicine and Radiology of the Chhattishgarh Dental College and Research Institute and evaluated bilaterally which were taken for diagnostic purposes from maxillofacial radiology clinic and data were statistically analyzed. This was an observational descriptive study and all the images were processed and analyzed on CS3D imaging software. The data was analyzed using chi square test. The prevalence of RMF and RMC was observed in 8.5%, of which 10 were in females and 7 in males. The RMCs traversed in different directions – horizontal, vertical and angular. Based on the subjective assessment, each of these canals was further subclassified into straight and curved canal. In the present study in 12 of the cases angular curved type was found and in 3 cases, vertical straight was noticed. The bifurcation of the inferior alveolar nerve (IAN) canal was observed in 15% of the scans and remaining 85% had single mandibular canal. The proximity of RMF from buccal and lingual cortical plates was found buccally in 16 cases and in single case was found to be lingually. Position of RMF might change with the presence and absence of third molar. The absence of third molar results in anteriorly located RMF. In majority of cases it was found that RMF was located more buccal than lingual. The parameters considered in the current study will guide the oral and maxillofacial surgeons while giving incisions in 3molar impacted cases, other pathologies and ease to preserve the retromolar foramen.

scholarly journals Frequency and risk factors for injury of the inferior alveolar nerve during surgical extraction of the impacted lower third molars

2019 ◽  
Vol 76 (12) ◽  
pp. 1240-1244
Author(s):  
Dejan Dubovina ◽  
Stevo Matijevic ◽  
Filip Djordjevic ◽  
Jelena Stanisic ◽  
Branko Mihailovic ◽  
...  
Keyword(s):  
Nerve Injury ◽  
Statistical Significance ◽  
Inferior Alveolar Nerve ◽  
Third Molar ◽  
Mandibular Canal ◽  
Sensory Disturbance ◽  
Third Molars ◽  
Root Tips ◽  
Surgical Extraction ◽  
Inferior Alveolar Nerve Injury

Background/Aim. The injury of inferior alveolar nerve during a surgical extraction of impacted lower third molars, followed by sensory disturbance, is, for the patient, an extremely unpleasant complication. The aim of this study was to determine the frequency of this complication after the third molar surgery and its frequency depending on a tooth position and tooth relation to the mandibular canal. Methods. In this study, 800 surgical extractions of the impacted lower third molar were performed. The position of the impacted tooth was recorded according to the Winter classification, as well as the ratio of their root tips to the mandibular canal using the Tanaka et al. and Rood and Shebab classifications. Results. The frequency of the recorded post extraction sensory disturbance was 2.25%, most frequently when teeth were in the mesioangular position. Concerning Tanaka and al. classification, the incidence of injuries was inversely proportional to the increase of distance between roots and mandibular canal with the statistical significance in cases where mandibular canal overlaps more than a half of the root of the tooth (p = 0.001). Considering the radiological signs recommended by Rood and Shehab, a higher frequency of the inferior alveolar nerve injury was recorded when illumination in the area of the root tips was present and when the loss of linear overshadowing characterized by the ?roof? and the ?bottom? of the mandibular canal were observed, or diversion of the canal and root deflection, but without a statistical significance. Conclusion. The superposition of the mandibular canal with the lower third molar roots at the panoramic radiographies may increase a possibility of the inferior alveolar nerve injury. The angulations of the impacted lower third molar as well as the vicinity of the tips of its roots to the content of the mandibular canal, do not significantly affect the frequency of the nerve injury.

scholarly journals Multiple unilateral accessory mandibular foramina-a case report

2012 ◽  
Vol 01 (04) ◽  
pp. 190-192
Author(s):  
Anupama Mahajan ◽  
Keyword(s):  
Case Report ◽  
Surgical Procedures ◽  
Inferior Alveolar Nerve ◽  
Third Molar ◽  
Mandibular Canal ◽  
Molar Tooth ◽  
Posterior Border ◽  
Mandibular Foramen ◽  
Inner Surface ◽  
Accessory Foramina

AbstractAccessory foramina in the mandible are known to transmit branches of nerves supplying the roots of the teeth. The mandibular foramen is present on the inner surface of the ramus of the mandible which transmits the inferior alveolar nerve. An adult human mandible of unknown sex was found to have multiple mandibular foramina on the medial surface of right ramus. A large accessory mandibular foramen was present anterosuperior to the main mandibular foramen. The dimensions were 6 mm antero posteriorly and 11mm vertically. The dimensions of the mandibular foramen were 9 mm antero posteriorly and 12mm vertically. The distance between two foramina was 20 mm and between the accessory mandibular foramen and apex of lingula was 7 mm. The distance between the posterior border of the accessory mandibular foramen and posterior border of ramus were 15 mm. The accessory mandibular foramen led into a canal which was directed obliquely and joined the mandibular canal at the level of third molar tooth. Two more small mandibular foramina were present one just below the accessory mandibular foramen discussed above and second near the main mandibular foramen. Both of them were of too small size to measure. The accessory mandibular foramen is a rare variation and awareness of its incidence and its position is necessary. The structures passing through it can be compromised during surgical procedures of this area.

scholarly journals Neurovascular Content of the Mandibular Canal and Its Clinical Relevance: A Literature Review of the Related Anatomical and Radiological Studies

2014 ◽  
Vol 18 (3) ◽  
pp. 124-132
Author(s):  
Apostolos N. Eliades ◽  
Kalliopi H. Manta ◽  
Anastasios T. Tsirlis
Keyword(s):  
Case Reports ◽  
Inferior Alveolar Nerve ◽  
Third Molar ◽  
Anatomical Variations ◽  
Mandibular Canal ◽  
Terminal Branch ◽  
Anatomical Structures ◽  
Mandibular Foramen ◽  
Anterior Trunk ◽  
Radiological Studies

SUMMARYIn literature, anatomical variations of the inferior alveolar nerve branches (infratemporal, extraosseous and intraosseous) are reported and their importance in clinical practice is discussed too. The spatial vessels’ position in relationship with the nerve in the mandibular canal was explored, which is of clinical significance in impacted third molar and implant surgery. It is believed that the neurovascular content of the main mandibular canal follows any variations of the mandibular canal i.e. bifid mandibular, retromolar and accessory mental canals. Retrospective studies and case reports reported the presence of multiple foramina on the medial surface of the ramus, near the main mandibular foramen. In some cases, one supplementary mandibular foramen was found to be connected with the lower third molar, which is called “temporal crest canal”. Others found an accessory mandibular foramen that led into a second mandibular canal which joined the main mandibular canal (double) anteriorly. The bony canals contained a terminal branch of the anterior trunk of the mandibular nerve or a branch of inferior alveolar nerve before it entered the mandibular foramen.The aim of the study was to describe and classify anatomical structures of the mandibular canal and posterior foramina of the mandible through an extensive review of the corresponding studies via the PubMed, Scopus and Google Scholar databases.

scholarly journals Modified coronectomy procedure for mandibular third molar: association of platelet-rich fibrin

2021 ◽  
Vol 69 ◽  
Author(s):  
Ronaldo Célio MARIANO ◽  
Alexandre Augusto Ferreira da SILVA ◽  
Guilherme Menali GOMES ◽  
Luis Henrique Theodoro ALVES ◽  
Marina Reis OLIVEIRA
Keyword(s):  
Inferior Alveolar Nerve ◽  
Third Molar ◽  
Panoramic Radiograph ◽  
Mandibular Canal ◽  
Modified Technique ◽  
Present Case Report ◽  
Platelet Rich Fibrin ◽  
Good Healing ◽  
Mandibular Third Molar

ABSTRACT The present case report describes a modified technique of coronectomy for mandibular third molar with association of Platelet-Rich Fibrin Graft (PRF). The panoramic radiograph showed proximity of the roots of the vertical positioned 48 tooth with the superior wall of the mandibular canal, since the erasure of the superior cortical of the mandibular canal was observed. Due to the risk of injury to the inferior alveolar nerve, the technique of coronectomy was chosen. After the realized the coronectomy, in order to promote the regeneration of soft and hard tissues and also to prevent pulp changes that could lead to pain, pulp necrosis and infection, the PRF graft was used to fill the surgical defect formed by removal of the crown. Good healing evolution was observed and after 12 months of clinical and radiographic follow-up there was complete bone formation in the area where the crown was removed and no complications were observed.

scholarly journals Coronectomy of the wisdom teeth: the dental extraction alternative

2021 ◽  
Vol 3 (59) ◽  
pp. 12-17
Author(s):  
Sergiu Beliniuc ◽  
◽  
Gabriela Motelica ◽  
Keyword(s):  
Inferior Alveolar Nerve ◽  
Third Molar ◽  
Mandibular Canal ◽  
Surgical Removal ◽  
Third Molars ◽  
Close Proximity ◽  
Wisdom Teeth ◽  
Low Incidence ◽  
Upper Third ◽  
Surgical Separation

Background. Coronectomy of the wisdom teeth is an alternative surgical procedure to tooth extraction, which aims to preserve the roots of the wisdom teeth in the dental socket after surgical separation of the crown, in order to avoid the injury of the inferior alveolar vascular-nervous bundle. Purpose. Minimizing the damage to the inferior alveolar nerve when extracting lower third molars caused by the intimate relationship between the nerve and the roots of the teeth, by using the technique of coronectomy, or intentional root retention. Material and Methods. Patients who reported to University Dental clinic during the period 2020–2021 for surgical removal of impacted L3M were screened for nerve–root relationship with OPG or CBCT. 15 patients underwent coronectomy as a procedure to remove the crown and upper third of the roots of a lower third molar to reduce the risk of damage to the inferior alveolar nerve. Results. 15 patients were enrolled in this study, with a total of 17 lower third molars. Sixteen sites healed primarily, but in 1 case the sockets on both sides opened and failed to close secondarily. In this case, the root fragments were later removed and found to be mobile. Conclusion. Coronectomies are safer to perform than complete extractions in situations in which the third molar is in close proximity to the mandibular canal. The technique appears to be associated with a low incidence of complications and the removal of remaining roots is required in around 6-7% of cases due to the mesial migration of the fragment and not any symptoms or reinfection.

scholarly journals The correlation between Rood and Shehab’s radiographic features and the incidence of inferior alveolar nerve paraesthesia following odontectomy of lower third molars

2017 ◽  
Vol 49 (2) ◽  
pp. 59
Author(s):  
David Buntoro Kamadjaja ◽  
Djodi Asmara ◽  
Gita Khairana
Keyword(s):  
Inferior Alveolar Nerve ◽  
Third Molar ◽  
Mandibular Canal ◽  
Cross Sectional Study ◽  
Third Molar Surgery ◽  
Third Molars ◽  
Chi Square ◽  
Cross Sectional ◽  
Radiographic Features ◽  
Close Relationship

Background: Odontectomy of lower third molar has a potential risk for inferior alveolar nerve impairment. Paresthesia of inferior alveolar nerve has often been associated with close relationship between the apex of lower third molar and mandibular canal. Rood and Shehab’s category has been commonly used for radiological prediction of inferior alveolar nerve injury following third molar surgery. Purpose: This study aimed to determine whether there was correlation between Rood and Shehab’s radiographic features and the incidence of inferior alveolar nerve paraesthesia following odontectomy of lower third molar. Method: This was a retrospective cross-sectional study, using data obtained from the dental record of patients who had undergone odontectomy of lower third molars in Dental hospital of Universitas Airlangga during 2 years period. Samples were cases that, from presurgical radiograph, showed close relationship between lower third molar roots and mandibular canal. The case and non-case groups were assigned based on the presence of paraesthesia and non-paraesthesia of inferior alveolar nerves, respectively. Based on Rood and Shehab’s category, the samples collected were then classified into two groups which were those whose relationship matched and did not match with the category, respectively. Data were analyzed using Chi-square correlation test. Result: Of 975 odontectomy cases included in this study, 80 cases were taken as study samples consisting of 15 and 65 cases assigned, respectively, as case and non-case. The 32 cases matched with the criteria of Rood and Shehab's category while the remainder of 48 cases did not. Of 32 cases which met the criteria of Rood and Shehab’s relationship, only 5 cases showed paraesthesia, whereas out of 48 cases which did not met the criteria 10 cases showed paraesthesia. Statistical analysis showed significance value of 0.770 (p>0.05) indicating that there was no significant correlation between relations of third molar root and mandibular canal, based on Rood and Shehab’s category, and the incidence of inferior alveolar nerve paraesthesia. Conclusion: There was no correlation between Rood and Shehab’s radiographic features and the incidence of paraesthesia of inferior alveolar nerve following odontectomy of lower third molars.

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