scholarly journals Evaluating the Relationship between Mandibular Third Molar and Mandibular Canal with Semiautomatic Segmentation: A Pilot Study on CBCT Datasets

2022 ◽  
Vol 12 (1) ◽  
pp. 502
Author(s):  
Rossana Izzetti ◽  
Marco Nisi ◽  
Stefano Gennai ◽  
Filippo Graziani
Keyword(s):  
Oral Surgery ◽  
Preoperative Evaluation ◽  
Intraclass Correlation ◽  
Inferior Alveolar Nerve ◽  
Third Molar ◽  
Third Molar Surgery ◽  
Post Processing ◽  
Mandibular Third Molar ◽  
Segmented Images ◽  
The Relationship

Inferior alveolar nerve injury is the main complication in mandibular third molar surgery. In this context, cone-beam computed tomography (CBCT) has become of crucial importance in evaluating the relationship between mandibular third molar and inferior alveolar nerve. Due to the growing interest in preoperative planning in oral surgery, several post-processing techniques have been implemented to obtain three-dimensional reconstructions of a volume of interest. In the present study, segmentation techniques were retrospectively applied to CBCT images in order to evaluate whether post-processing could offer better visualization of the structures of interest. Forty CBCT examinations performed for inferior third molar impaction were analyzed. Segmentation and volumetric reconstructions were performed. A dataset composed of multiplanar reconstructions for each study case, including segmented images, was submitted for evaluation to two oral surgeons, two general practitioners and four residents in oral surgery. The visualization of root morphology, canal course, and the relationship with mandibular cortical bone on both native CBCT and segmented images were assessed. Inter-rater agreement showed values of intraclass correlation coefficient (ICC) above 0.8 for all the examined parameters. Oral surgeons presented higher ICC values (p < 0.05). Segmented images can improve preoperative evaluation of the third molar and its relationship with the surrounding anatomical structures compared to native CBCT images. Further evaluation is needed to validate these preliminary results.

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 Comparison of Articaine and Lidocaine for Buccal Infiltration After Inferior Alveolar Nerve Block For Intraoperative Pain Control During Impacted Mandibular Third Molar Surgery

2017 ◽  
Vol 64 (2) ◽  
pp. 80-84 ◽  
Author(s):  
Geraldo Prisco da Silva-Junior ◽  
Liane Maciel de Almeida Souza ◽  
Francisco Carlos Groppo
Keyword(s):  
Nerve Block ◽  
Inferior Alveolar Nerve ◽  
Third Molar ◽  
Third Molar Surgery ◽  
Inferior Alveolar Nerve Block ◽  
Mandibular Third Molar ◽  
Intraoperative Pain ◽  
Group 2 ◽  
Mandibular Third Molar Surgery ◽  
Buccal Infiltration

In order to compare the efficacy of lidocaine and articaine for pain control during third molar surgery, 160 patients presenting bilateral asymptomatic impacted mandibular third molars were selected. They received 1.8 mL of 2% lidocaine with epinephrine 1:100,000 during inferior alveolar nerve block. In group 1 (n = 80), an infiltrative injection of 0.9 mL of 2% lidocaine with epinephrine 1:100,000 was performed in buccal-distal mucosa of the third molar. Group 2 (n = 80) received 0.9 mL of 4% articaine with epinephrine 1:100,000 in the contralateral side. All procedures were performed at the same visit, by a single operator, in a double-blind and parallel design. The duration of each surgery and the moment when the patient expressed pain were noted. Data were analyzed by nonpaired t test and chi-square test (alpha = 5%). Duration of surgery did not differ (p = .83) between Groups 1 (19.8 ± 2.3 minutes) and 2 (19.7 ± 3.0 minutes). Pain was expressed more in group 1 (26.3%) than in group 2 (10%) (odds ratio = 3.2, p = .0138). In both groups, tooth sectioning was the most painful event (p &lt; .0001). No influence of gender (p = .85) or age (p = .96) was observed in pain response. Buccal infiltration of 4% articaine with epinephrine 1:100,000 showed more efficacy than 2% lidocaine with epinephrine 1:100,000 when used in combination with inferior alveolar nerve block in controlling intraoperative pain related to impacted mandibular third molar surgery.

STUDY OF CORRELATION BETWEEN HEALING AFTER IMPACTED THIRD MOLAR SURGERY AND THE DEGREE OF IMPACTION

2011 ◽  
pp. 116-123
Author(s):  
Tan Tai Tran
Keyword(s):  
Significant Proportion ◽  
Third Molar ◽  
Third Molar Surgery ◽  
Relative Depth ◽  
Type I ◽  
Wisdom Tooth ◽  
Mandibular Third Molar ◽  
Vertical Impaction ◽  
Wisdom Teeth ◽  
The Relationship

Background: The mandibular third molar is the most common tooth to become impacted than other teeth, often causing more complications in the process of growing, influence to the lives of patients. Removal of wisdom teeth is one of the most common dental surgical procedures, is an invasive intervention caused significant injury to the bone and soft tissue, so hard to avoid possible complications after surgery. Understand the relationship between degree of impaction and healing after mandibular wisdom tooth surgery will bring many benefits to surgeons and patients. The purpose of this study is to evaluate the degree of impaction of mandibular third molar and explore the relationship between healing after mandibular wisdom tooth surgery with the degree of impaction. Materials and method: The study consisted of 40 patients, average age 29.38 ± 9.8 a impacted mandibular third molar and cause complications, tooth extraction is indicated. All are to be attended to, determine the degree of impaction, wisdom tooth surgery. Evaluate the healing through pain, swelling, limited mouth open after 2 days, 1 week and 2 weeks. Result: Correlation of wisdom teeth to ramus and adjacent teeth mainly type I (45%) and type II (35%), type III accounted for the lowest rates (20%). Relative depth of wisdom teeth in the bone mainly position A (45%), B position also accounts for a significant proportion (35%), positions C (20%). Correlation of wisdom teeth axis to adjacent teeth: mesioangular impactions (50%) and horizontal (30%), distoangular impaction (2.5% and 5%), vertical impaction (12, 5%). Pain, swelling, limited mouth open only happen the first two days in groups I and II, group III of symptoms until a week after surgery. Conclusion: There is correlation between the degree of impaction and healing after mandibular wisdom tooth surgery. Degree of as much impaction, the level of pain, swelling, limited mouth open higher. Key words: mandibular third molar; impaction

scholarly journals Anestesia transcortical em exodontias simples e complexas

2020 ◽  
Vol 9 (10) ◽  
pp. e9039108109
Author(s):  
Haline Alves da Silva ◽  
Mirelle de Sousa Soares ◽  
Paulo Ronaldo Sousa Texeira ◽  
Marcelo Bruno Meneses Mendes ◽  
Maria Cândida de Almeida Lopes
Keyword(s):  
Tooth Extraction ◽  
Oral Surgery ◽  
Third Molar ◽  
Third Molar Surgery ◽  
Mandibular Third Molar ◽  
Intraosseous Injection ◽  
Mandibular Third Molar Surgery

Anestesia transcortical consiste no depósito da solução anestésica no osso esponjoso adjacente ao dente a ser anestesiado. O objetivo desse trabalho é apresentar um levantamento retrospectivo científico sobre a eficácia clínica da anestesia transcortical aplicada às exodontias simples e complexa através de revisão de literatura. Foi realizada uma pesquisa nas bases Pubmed, SciELO e Scopus, usando as combinações de palavras-chave “intraosseous injection AND oral surgery”, “tooth extraction AND intraosseous anesthesia”, “mandibular third molar surgery AND intraosseous injection” e “tooth extraction AND transcortical anesthesia”. Foram incluídos estudos clínicos publicados no período de 2000 a 2020, em inglês. Foram excluídos estudos laboratoriais, estudos em animais, casos clínicos e revisões de literatura. Quanto aos resultados, foram localizados 92 aplicando-se as palavras-chave, dos quais 7 foram incluídos após critérios de inclusão e exclusão, através de leitura dos títulos, resumos e textos completos. A maioria (n=6) era estudos clínicos, dos quais 5 eram randomizados. Todos os estudos avaliaram o sistema QuickSleeper, incluindo comparação a anestesia transcortical com a técnica de bloqueio do nervo alveolar inferior (n=3). A percepção dolorosa (n=3) e a eficácia (n=4) foram os fatores mais avaliados nos trabalhos. A anestesia transcortical é uma alternativa às técnicas convencionais e pode ser aplicada em casos de falhas ou insuficiências da anestesia convencional em exodontias simples e complexas.

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