scholarly journals Influência da curetagem alveolar na cicatrização após exodontia em cães

2021 ◽  
Vol 25 (1) ◽  
pp. 39-53
Author(s):  
Alan L. Katz
Keyword(s):  
Mandibular Canal ◽  
Third Molars ◽  
Mandibular Third Molars ◽  
The Right ◽  
Bone Deposition ◽  
Lateral Walls

Effects of curettage on the healing pattern of extraction wounds and their surrounding structures of the mandibular canal and nerve were observed and compared after extraction of mandibular third molars from dogs, the right alveoli having been submitted to a thorough curettage. New bone deposition on the upper and lateral walls of the mandibular canal was observed, surrounding and squeezing the nerve.

scholarly journals Cone beam CT and treatment decision of mandibular third molars: removal vs. coronectomy—a 3-year audit

2020 ◽  
Vol 49 (3) ◽  
pp. 20190250 ◽  
Author(s):  
Louise Hauge Matzen ◽  
Julie Suhr Villefrance ◽  
Sven Erik Nørholt ◽  
Jesper Bak ◽  
Ann Wenzel
Keyword(s):  
Cone Beam Ct ◽  
Inferior Alveolar Nerve ◽  
Treatment Decision ◽  
Close Relation ◽  
Mandibular Canal ◽  
Panoramic Image ◽  
Third Molars ◽  
Sensory Disturbances ◽  
Mandibular Third Molars ◽  
The Impact

Objectives: To assess: (1) the workflow in the treatment decision process of mandibular third molars based on a panoramic image and CBCT and (2) the impact of radiographic markers in CBCT on the decision to perform coronectomy. Methods: 1437 teeth in 917 patients (mean age 27.8 years, range 18–72) underwent clinical and panoramic examination. If there was an indication for removal of the tooth, and signs of a close relation to the inferior alveolar nerve were present in the panoramic image, a CBCT was performed. Treatment decision based on panoramic image and CBCT was calculated. Statistical analyses were performed to assess whether signs in CBCT had an impact on the treatment decision “coronectomy”. Moreover, the actually operated teeth and post-operative sensory disturbances were assessed and discussed in relation to the radiographic method. Results: Based on the panoramic image, in 462 cases it was decided not to treat, 553 were scheduled for surgery, and 422 referred for a CBCT examination. “No bony separation between the tooth and mandibular canal” seen in CBCT was the main factor influencing the decision to perform a coronectomy (odds ratio = 56.8, p < 0.001). 840 mandibular third molars had undergone surgical intervention, 152 had a coronectomy and 688 were fully removed. Six patients perceived a sensory disturbance of the inferior alveolar nerve: one permanent and five temporary. Conclusion: 29% of the examined cases were referred for a CBCT and of these, the majority were scheduled for coronectomy based on the sign “no bony separation between the tooth and mandibular canal” seen in CBCT.

scholarly journals Radiographic assessment of impacted mandibular third molars

2021 ◽  
Vol 7 (3) ◽  
pp. 94-98
Author(s):  
Pankaj Kukreja ◽  
Fahd Nasser Al Qahtani ◽  
Ahad Fahd Al Qahtani ◽  
Modi Fahd Al Qahtani ◽  
Majedah Fahd Al Qahtani ◽  
...  
Keyword(s):  
Mandibular Canal ◽  
Lingual Nerve ◽  
Structural Systems ◽  
Imaging Method ◽  
Third Molars ◽  
Radiographic Assessment ◽  
Lower Jaw ◽  
Impacted Mandibular Third Molars ◽  
Mandibular Third Molars ◽  
Crown Roots

The surgical remedy of problems related to lower jaw 3 molars is related to common surgical risks like contamination, haemorrhage, pain and swelling. Certain unique risks are related with such surgery, specifically inferior alveolar and lingual nerve harm as these are adjacent vital structures. Risk assessment calls for an entire understanding of dental factors that can impact the care of these characteristic structures. Preoperative radiographic assessment warrants to provide data about the tooth itself, its encompassing bone, the neighbouring dentition, and related anatomical structural systems. Parameters that ought to be assessed are level of impaction, root formulations, angulation of the enamel, number of roots, root morphology, related pathology and, most importantly, the relation some of the crown/roots and the mandibular canal. An appropriate imaging method for 3 molars ought to display the complete 3rd molar and the mandibular canal below it. In this mini review, we elaborate on the generally used radiographic assessment methods of mandibular 3rd molars.

Orthodontic Extraction of High-Risk Impacted Mandibular Third Molars in Close Proximity to the Mandibular Canal: A Systematic Review

2015 ◽  
Vol 73 (9) ◽  
pp. 1672-1685 ◽  
Author(s):  
Mahmood Reza Kalantar Motamedi ◽  
Majid Heidarpour ◽  
Sara Siadat ◽  
Alimohammad Kalantar Motamedi ◽  
Ali Akbar Bahreman
Keyword(s):  
Systematic Review ◽  
High Risk ◽  
Mandibular Canal ◽  
Third Molars ◽  
Close Proximity ◽  
Impacted Mandibular Third Molars ◽  
Mandibular Third Molars

scholarly journals Influence of First Premolar Extraction on Mandibular Third Molar Angulation

2009 ◽  
Vol 79 (6) ◽  
pp. 1143-1148 ◽  
Author(s):  
Suruchi Jain ◽  
Ashima Valiathan
Keyword(s):  
Third Molar ◽  
Positive Influence ◽  
Reference Plane ◽  
Third Molars ◽  
Premolar Extraction ◽  
Mandibular Third Molar ◽  
Significant Difference ◽  
The Mean ◽  
Mandibular Third Molars ◽  
The Right

Abstract Objective: To compare the angular changes in the developing mandibular third molars in both first premolar extraction and nonextraction cases and to determine whether premolar extraction results in a more mesial movement of the mandibular buccal segment and causes favorable rotational changes in the mandibular third molar tilt, which can enhance later eruption of the third molars. Materials and Methods: Pretreatment (T1) and posttreatment (T2) panoramic radiographs were taken of 25 subjects who had been treated by the extraction of all the first premolars and 25 subjects who had been treated with nonextraction. The horizontal reference plane was used to measure and compare the changes in the angles of the developing mandibular third molars. Results: The mean uprighting of the mandibular third molars seen in the extraction group was 8.2 ± 5.4 degrees on the left side and 6.3 ± 6.5 degrees on the right side following treatment (T2 − T1). For the nonextraction group the mean difference was 1.3 ± 4.3 degrees on the left side and 1.7 ± 5.4 degrees on the right side. There was a statistically significant difference between the groups (P = .012 on the right side and P &lt; .001 on the left side). Conclusions: Premolar extractions had a positive influence on the developing third molar angulations. Nonextraction therapy did not have any adverse effects.

scholarly journals Anatomical Position of Lower Third Molar in Relation to Mandibular Canal on Cone-Beam Computed Tomography Images in A Tertiary Care Hospital: A Descriptive Cross-sectional Study

2020 ◽  
Vol 58 (231) ◽  
Author(s):  
Bikash Chaudhary ◽  
Ujjwal Joshi ◽  
Pranaya Khanal ◽  
Alok Sagtani ◽  
Sirjana Dahal ◽  
...  
Keyword(s):  
Tertiary Care ◽  
Third Molar ◽  
Mandibular Canal ◽  
Cross Sectional Study ◽  
Care Hospital ◽  
Third Molars ◽  
Cross Sectional ◽  
Computed Tomography Images ◽  
Mandibular Third Molar ◽  
Mandibular Third Molars

Introduction: The positional relationship between the mandibularcanal with impacted mandibular third molar is the main factor of inferior alveolar nerve injury. The purpose of this study wasto classify the anatomical three dimensional relationship between the proximity of impacted mandibular third molars to the inferior alveolar canal. Methods: The descriptive cross-sectional study was conducted inthe Department of Oral and Maxillofacial Surgery of a tertiary care hospital from July 2020 to August 2020 after obtaining ethical approval from the Institutional Review Committee (Reference number 2506202001). Cone-beam computed tomography images of 200 patients’ mandibular third molars were used. A convenient sampling method was used. Data were analyzed using Statistical package for the Social Sciences. Results: Mandibular canal relative to the roots of the mandibular third molar was observed on the apical side in 104 (52.0%) and 173 (86.5%) third molars had direct contact with the mandibular canal. About 36 (97.3%) lingually placed mandibular third molars had contact with the mandibular canal. Conclusions: The findings of the study conclude that most of the mandibular third molars situated lingually had a higher occurrence of mandibular nerve involvement. The anatomic structures of the mandibular third molar and the mandibular canal may be helpful to draw upon the adequate surgical plan to avoidor reduce nerve involvement.

scholarly journals Comparison of Digital OPG and CBCT in Assessment of Risk Factors Associated with Inferior Nerve Injury during Mandibular Third Molar Surgery

Diagnostics ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 2282
Author(s):  
Rakhi Issrani ◽  
Namdeo Prabhu ◽  
Mohammed Sghaireen ◽  
Hasna Rasheed Alshubrmi ◽  
Amal Mohamed Alanazi ◽  
...  
Keyword(s):  
Inferior Alveolar Nerve ◽  
Third Molar ◽  
Mandibular Canal ◽  
Third Molars ◽  
Factors Associated ◽  
Impacted Third Molar ◽  
Mandibular Third Molar ◽  
Mandibular Molar ◽  
Impacted Mandibular Third Molars ◽  
Mandibular Third Molars

Background: Pre-operative radiographic assessment of the anatomical relationship between the roots of the mandibular third molar and the inferior alveolar nerve (IAN) is a must to minimize the risk of IAN injury during surgery. Objectives: To compare the radiographic signs of digital orthopantomogram (OPG) and cone-beam computed tomography (CBCT). An additional objective was to assess the cortex status between the mandibular canal and third molar on CBCT images in relation to the demographic characteristics, region (right or left side), and angulation of mandibular molar. Methodology: In this retrospective study, a total of 350 impacted mandibular third molars with a close relationship between the inferior alveolar canal (IAC) and impacted mandibular third molars on digital OPG were further referred for CBCT imaging for assessment of the position of the mandibular canal. The study was conducted between August 2018 and February 2020. Digital OPGs were evaluated for radiographic signs like interruption of the mandibular canal wall, darkening of the roots, diversion of the mandibular canal, and narrowing of the mandibular canal. The age and sex of patients, site of impacted third molar, Winter’s classification of mandibular third molar, position of IAC relative to impacted molar, and the radiographic markers of OPG were assessed for cortical integrity using CBCT. Chi square testing was applied to study the values of difference and binomial logistic regression was done to assess the factors associated with cortication. Statistical significance was set at p ≤ 0.05. Results: Among 350 patients, 207 (59.1%) were male and 143 (40.9%) were female with a mean age of 36.8 years. The most common OPG sign was interruption of white line, seen in 179 (51.1%) cases. In total, 246 cases (70.3%) showed an absence of canal cortication between the mandibular canal and the impacted third molar on CBCT images. Cortication was observed in all cases with a combination of panoramic signs which was statistically significant (p = 0.047). Cortication was observed in 85 (50.6%) cases where IAC was positioned on the buccal side, 11 (16.9%) in cases of inferiorly positioned IAC, and just 8 (7.6%) for cases of lingually positioned IAC which was statistically significant (p = 0.003). Statistically insignificant (p > 0.05) results were noted for cortex status in CBCT images with regards to the age, sex, site, and angulation of impacted third molars. Conclusion: CBCT imaging is highly recommended for those cases where diversion of the mandibular canal is observed on OPG and when the roots are present between canals.

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