Prediction of mandibular third-molar impaction in adolescent orthodontic patients

2006 ◽  
Vol 130 (1) ◽  
pp. 47-55 ◽  
Author(s):  
Faraj Behbehani ◽  
Jon Årtun ◽  
Lukman Thalib
Keyword(s):  
Third Molar ◽  
Mandibular Third Molar ◽  
Orthodontic Patients

scholarly journals Assessment of role of mandibular third molar in lower anterior crowding among orthodontic patients of Kathmandu Nepal

2020 ◽  
Vol 10 (3) ◽  
pp. 21-26
Author(s):  
Bashu Dev Pant ◽  
Anjana Rajbhandari ◽  
Resina Pradhan ◽  
Manju Bajracharya ◽  
Surendra Maharjan ◽  
...  
Keyword(s):  
Third Molar ◽  
Cross Sectional Study ◽  
Third Molars ◽  
Chi Square ◽  
Cross Sectional ◽  
Anterior Crowding ◽  
Mandibular Third Molar ◽  
Significant Difference ◽  
Orthodontic Patients

Introduction: Crowding in mandibular arch increases with increasing age and etiology of crowding is multifactorial in nature. Role of mandibular third molar in lower anterior crowding remains a topic of controvery over a period of century. The objective of this study was to assess whether there is any correlation between presence of mandibular third molar position and lower anterior crowding. Materials and Method: On the basis of third molar position one hundred and six sample of pretreatment orthodontic patients aged between 17 to 38 years were divided into erupted, erupting and agenesis group. The study was conducted in Peoples Dental College and Hospital from January 2020 to March 2020 after obtaining ethical approval from the institutional review committee. This cross-sectional study was done on dental casts and orthopantomogram; brass wire was used for measuring arch length and digital vernier caliper for measuring tooth material with modified segmental arch analysis method. Result: Among 106 samples collected 55 (51.88%) were female and 51(48.11%) were male and the mean age was 21.53 ± 3.91 years, Chi square and ANOVA test was used for Statistical analysis. This study showed no statistically significant differences between third molar position and lower anterior crowding on right (P= 0.68) and left side (P = 0.45). The study also showed that association between the third molar position and lower anterior crowding is more on left side compared to right side. Conclusion: Mandibular third molars have not statistically significant difference in lower anterior crowding so, extraction of third molars for relieving the anterior crowding is not justifiable

scholarly journals Frequency of mandibular third molar surgical impactions in orthodontic patients with different antegonial notching

2019 ◽  
Vol 8 (3) ◽  
pp. 112-116
Author(s):  
Muhammad Azeem ◽  
Muhammad Mudassar Saleem ◽  
Zubair Hassan Awaisi ◽  
Muhammad Imran Saleh ◽  
Zubair Ahmed ◽  
...  
Keyword(s):  
Third Molar ◽  
Morphological Characteristics ◽  
P Value ◽  
Third Molars ◽  
Cross Sectional ◽  
Male And Female ◽  
Mandibular Third Molar ◽  
Orthodontic Patients ◽  
Inferior Border ◽  
Medical University

Background: Few studies have been reported so far on the frequency of lower third molar impactions in patients with different morphological characteristics. Our aim in this study was to find out the frequency of impacted lower third molars in orthodontic patients with different antegonial notch depths. Material and Methods: This cross-sectional research was conducted at Orthodontics Department of Dental Section, Faisalabad Medical University, Faisalabad, and de’Montmorency College of Dentistry, Lahore, Pakistan from June 2017 to June 2019. A total of 60 orthopantomograms (OPGs) of patients with impacted lower third molars were included. The depth of antegonial notch was calculated on all the selected OPGs by measuring distance between the deepest area of the notch cavity and the tangent on the inferior border of the mandible. The patients with depth of antegonial notch of 1 mm or less were labeled as having shallow antegonial notch, while those with 3 mm or more were considered as having deep antegonial notch. Percentages and mean + SD were calculated for different variables. Depth of antegonial notching was compared between genders using ANOVA with P-value <0.5 considered as significant. Results: Of 60 orthodontic patients, there was an equal number of male and female patients (n=30). The average age of the patients was 25.5±4 years. Overall frequency of impactions was similar in both the genders and frequency of impacted lower third molars was found to be greater in patients with deeper antegonial notches. Conclusion: Mandibular third molar impactions were most frequent in orthodontic patients with deep antegonial notches

scholarly journals The ability of orthodontists and maxillofacial surgeons in predicting spontaneous eruption of mandibular third molar using panoramic serial radiographs

2020 ◽  
Vol 25 (4) ◽  
pp. 68-74
Author(s):  
Mylena Ranieri Libdy ◽  
Nicole Melres Rabello ◽  
Leandro Silva Marques ◽  
David Normando
Keyword(s):  
Orthodontic Treatment ◽  
Third Molar ◽  
Panoramic Radiograph ◽  
Third Molars ◽  
The Third ◽  
Mandibular Third Molar ◽  
Panoramic Analysis ◽  
Orthodontic Patients ◽  
Mandibular Third Molars

ABSTRACT Objective: To evaluate the skill of orthodontists and oral/maxillofacial surgeons (OMFS) in providing a prognosis of mandibular third molars spontaneously erupted, through follow-up panoramic analysis. Methods: 22 orthodontic patients treated without extraction, presenting spontaneously erupted mandibular third molars (n = 44) were analyzed through panoramic serial radiographs. The first panoramic radiograph was obtained just after orthodontic treatment (PR1), in patients aging from 13 to 19 years. A second panoramic radiograph (PR2), was obtained in average two years later. The radiographs were randomly analyzed by 54 specialists, 27 orthodontists and 27 OMFS, to obtain the opinion about the approach to be adopted to these teeth in PR1. Then, another opinion was collected by adding a serial radiograph (PR1+2). Results: The concordance of the answers was moderate for OMFS (Kappa 0.44; p< 0.0001) and significant for orthodontists (Kappa 0.39; p< 0.0001). In the analysis of the first radiograph (PR1) of the spontaneously erupted molars, OMFS indicated extraction in 44.5% of cases, while orthodontists indicated in 42%, with no difference between groups (p= 0.22). In PR1+2 analysis, orthodontists maintained the same level of extraction indication (45.6%, p= 0.08), while surgeons indicated more extractions (63.2%, p< 0.0001). Conclusions: Orthodontists and OMFS were not able to predict the eruption of the third molars that have erupted spontaneously. Both indicated extractions around half of the third molars. A follow-up analysis, including one more radiograph, did not improve the accuracy of prognosis among orthodontists and worsened for OMFS.

scholarly journals Is There a Possible Association between Skeletal Face Types and Third Molar Impaction? A Retrospective Radiographic Study

2018 ◽  
Vol 28 (1) ◽  
pp. 70-74 ◽  
Author(s):  
Melek Tassoker ◽  
Hatice Kok ◽  
Sevgi Sener
Keyword(s):  
Third Molar ◽  
Lower Prevalence ◽  
Facial Growth ◽  
Contributing Factors ◽  
Maxillary Third Molar ◽  
Mandibular Third Molar ◽  
Significant Difference ◽  
Orthodontic Patients ◽  
Mandibular Third Molars ◽  
Facial Types

Objective: Third molar impaction is seen much more than impaction of any other tooth as they are the last teeth to erupt. Inadequate retromolar space and the direction of eruption may be contributing factors. The aim of this study was to investigate the relationship between third molar impaction and different skeletal face types. Subjects and Methods: Panoramic and lateral cephalometric radiographs of 158 orthodontic patients (aged 19–25 years) were retrieved from the archived records of the Necmettin Erbakan University Faculty of Dentistry, Konya, Turkey. Third molar impaction was classified on the basis of Winter’s classification. The skeletal facial type was determined by a measure of the angle created by the lines Ba-Na and Pt-Gn. The mean was 90 ± 2 and this value was regarded as mesofacial. An angle of > 93° was regarded as brachyfacial and an angle of < 87° as dolichofacial. Results: The overall presence of mandibular and maxillary third molar impactions was 65.2 and 38.6%, respectively. Although there was a statistically significant difference between different skeletal facial types and mandibular third molar impaction (p < 0.05), no statistically significant differences were observed between different skeletal facial types and maxillary third molar impaction (p > 0.05). Brachyfacials demonstrated a lower prevalence of third molar impaction than dolichofacials. Conclusions: Different skeletal face types were associated with mandibular third molar impaction. Brachyfacials, who have a greater horizontal facial growth pattern than dolichofacials, showed a lower prevalence of impacted mandibular third molars.

Investigation of infectious organisms causing pericoronitis of the mandibular third molar

2000 ◽  
Vol 58 (6) ◽  
pp. 611-616 ◽  
Author(s):  
Heidrun Peltroche-Llacsahuanga ◽  
Engelbert Reichhart ◽  
Walter Schmitt ◽  
Rudolf L[uuml ]tticken ◽  
Gerhard Haase
Keyword(s):  
Third Molar ◽  
Mandibular Third Molar

Effect of Age, Gender, Side and Impaction Types on Surgical Difficulty During Mandibular Third Molar Extraction.

2018 ◽  
Vol 17 (2) ◽  
pp. 11
Author(s):  
Krishna Gopal Bhuju ◽  
Sujita Shrestha ◽  
Riwaj Karki ◽  
Sameer Aryal
Keyword(s):  
Third Molar ◽  
Objective Measure ◽  
Operation Time ◽  
Significance Level ◽  
Third Molar Extraction ◽  
Mandibular Third Molar ◽  
Duration Of Surgery ◽  
Surgical Difficulty ◽  
Effect Of Age ◽  
Molar Extraction

<p><strong>Aim</strong>: To study the effect of age, gender, side and impaction types on surgical difficulty during mandibular third molar extraction through the data collected over a period of one year by single maxillofacial surgeon. All the extractions were performed under the same environment and conditions.</p><p><strong>Methods</strong>: Descriptive clinical study of 401 patients was carried out between the ages of 16 to 45years. Age, gender, impaction side and impaction types (according to the winter classification) were recorded on proforma. Duration of surgery for each patient was recorded after starting incision to the completion of suture which was divided into less than 10 minutes (mild), 11 to 20 minutes (moderate) and above 21 minutes (severe). Pearson’s Chi-square test was used for data analysis and significance level was less than or equal to 0.05.</p><p><strong>Results</strong>: Among 401 participants, 225 (56.1%) were male and 176 (43.9%) were female. Mean age was 31.5 years and mean operation time was 17.59 minutes. After statistical analysis there was a significant correlation among gender and side of impaction where <em>p </em>value is 0.043 0.048 respectively.</p><p><strong>Conclusion</strong>: There is a statistically significant correlation between gender and side of impaction with duration of surgery which is considered as the objective measure of surgical difficulty whereas age and impaction types didn’t show any significant correlation. </p>

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