Does the Relationship between Retained Mandibular Third Molar and Mandibular Angle Fracture Exist? An Assessment of Three Possible Causes

The objective of this study is to discuss problems associated with dental retention through three clinical cases of mandible fractures related to the presence of retained lower third molars, emphasizing the possibility of mandible fractures resulting from this or from the extraction procedure. The three evaluated patients had a fracture in the mandible angle. The third molars were present in all the cases, as was the relationship of the fracture with the teeth. After evaluating the three cases and reviewing literature, it is believed that the presence of the retained lower third molars and the surgical procedures for their extraction increase the risk of mandible angle fractures.

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Qualitative and quantitative assessment of relationship between mandibular third molar and angle fracture on North Indian population: A clinico-radiographic study

European Journal of Dentistry ◽

10.4103/1305-7456.110188 ◽

2013 ◽

Vol 07 (02) ◽

pp. 212-217 ◽

Cited By ~ 9

Author(s):

Suresh Yadav ◽

Shallu Tyagi ◽

Naveen Puri ◽

Prince Kumar ◽

Puneet Kumar

Keyword(s):

Third Molar ◽

Indian Territory ◽

Mandibular Angle ◽

The North ◽

Mandibular Angle Fracture ◽

Mandibular Third Molar ◽

Angle Fracture ◽

Angle Fractures ◽

Inferior Border ◽

The Relationship

ABSTRACT Objective: To assess the relationship between impacted mandibular third molar presence and the risk for mandibular angle fracture with the effect of various positions of mandibular third molar and the risk of mandibular angle fracture. Materials and Methods: In the North Indian territory, a total of 289 patients with mandibular angle fractures were studied and evaluated for the possible relationship with impacted third molar on the basis of clinical and panoramic radiographical findings. Results: Results that confirmed the highest risk for mandibular angle fracture was associated with mesioangular angulations (45.42%) followed by vertical (26.34%), distoangular in sequence and least risk was found with bucco-version angulations (2.67%) according to Winter′s classification. Additionally, the highest risk of mandibular angle fracture was reported with partially erupted third molar (47.75%), followed by erupted (23.53%) and unerupted third molar (19.38%). Conclusion: The risk for mandibular angle fracture is not only affected by status of eruption, angulations, position, number of roots present in third molar but also by the distance of mandibular third molar from inferior border of mandible and the percentage of remaining amount of bone at the mandibular angle region.

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Impacted Mandibular Third Molars and Their Influence on Mandibular Angle and Condyle Fractures

Craniomaxillofacial Trauma & Reconstruction ◽

10.1055/s-0039-1685459 ◽

2019 ◽

Vol 12 (4) ◽

pp. 291-300 ◽

Cited By ~ 3

Author(s):

Anhad Mehra ◽

Venkatesh Anehosur ◽

Niranjan Kumar

Keyword(s):

Root Development ◽

Third Molar ◽

Fracture Pattern ◽

Third Molars ◽

Angle Fracture ◽

Impacted Mandibular Third Molars ◽

Mandible Fractures ◽

Mandibular Third Molars ◽

Angle Fractures ◽

Condyle Fracture

The aim of this study is to retrospectively analyze the effect unerupted or partially erupted third molars have on the angle and condyle fracture patterns of the mandible. It also focuses on evaluating the type of impaction that causes angle fracture and the level at which the condyle most commonly fractures. The study involves all the patients who had undergone treatment for condylar and angle of the mandible fractures from 2010 to 2017 in our craniofacial center. The case records and orthopantomograms of each patient were taken into consideration and a correlation was established based on gender, age, etiology, presence of third molars, position of third molars, angulation, and root development of third molars. Of the 150 angle fracture patients, 146 had third molars and 4 did not, whereas of the 130 condyle fractures, third molar was present in 54 patients and absent in 76. The prevalence of angle fractures was statistically significant when a third molar was present, whereas the prevalence of condyle fractures was higher when third molar was absent. The results of age, etiology, angulation, position, and root development of third molars were also statistically significant. However, sex of the patient did not influence the fracture pattern. The presence of an impacted third molar or a completely erupted one has a definite influence on the fracture pattern of the mandible. The occurrence of angle and condyle fractures was mostly affected by the continuity of the cortical bone at the angle of the mandible. Hence, prophylactic removal of mandibular third molars does increase the risk of condyle fractures.

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The Oblique Lateral Jaw Radiograph

British Journal of Orthodontics ◽

10.1179/bjo.1.4.139 ◽

1974 ◽

Vol 1 (4) ◽

pp. 139-142

Author(s):

C. P. Adams

Keyword(s):

Present Article ◽

Third Molar ◽

Third Molars ◽

X Ray ◽

The Third ◽

Molar Teeth ◽

Relationship Of ◽

The Relationship ◽

Film Area

The Oblique Lateral Jaw Radiograph has been used as a routine diagnostic x-ray view for many years as an aid to orthodontic diagnosis and for the assessment of the positions of unerupted third molar teeth. Many methods for obtaining clear undistorted views of the teeth have been suggested from a freehand setting up of film, patient and x-ray tube, to the use of simple orientated devices. The present article describes a method of standardizing the relationship of film and x-ray tube to one another so that it is only necessary for the radiographer thereafter to place the patient on the film area in a manner depending on whether a view. is required of the third molars only or of the complete upper and lower buccal segments.

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Presence and Maturation Dynamics of Mandibular Third Molars and Their Influence on Late Mandibular Incisor Crowding: Longitudinal Study

10.21203/rs.3.rs-538924/v1 ◽

2021 ◽

Author(s):

Martina Žigante ◽

Andrej Pavlic ◽

Luka Morelato ◽

Vaska Vandevska-Radunovic ◽

Stjepan Spalj

Keyword(s):

Third Molar ◽

Third Molars ◽

Mandibular Incisor ◽

Dental Maturation ◽

The Third ◽

Irregularity Index ◽

Mandibular Third Molar ◽

Mandibular Third Molars ◽

Dental Plaster ◽

The Relationship

Abstract OBJECTIVE: To investigate the relationship between the presence and dynamics of mandibular third molar development and the occurrence and amount of late mandibular incisor crowding. MATERIALS AND METHODS: Dental plaster casts and panoramic radiographs of 72 orthodontically untreated subjects from the Nittedal growth study, Norway were analysed. The subjects were recalled for check-up at 12, 15, 18 and 21 years of age. Mandibular incisor crowding was assessed using the Little’s irregularity index and dental maturation of the third molars by the Cameriere’s index.RESULTS: The majority of the subjects (64%) had ≥1mm increase in irregularity; 22% experienced increase of 0.1-0.9mm and 14% had unchanged or decreased irregularity. Incisor irregularity increased with age, regardless of absence or presence of third molars. The amount of change in incisor irregularity from 12 to 21 years did not differ significantly between subjects with hypodontia of third molars, extraction and those with third molars present. No differences were observed between erupted, unerupted or impacted third molars. No correlation was found between the amount of change in irregularity and maturation of the third molars.CONCLUSIONS: Occurrence and amount of mandibular late incisor crowding is not significantly influenced by presence or development dynamics of mandibular third molars.

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Evaluation of Mandibular Third Molar Region in a Turkish Population Using Cone-Beam Computed Tomography

Current Medical Imaging Formerly Current Medical Imaging Reviews ◽

10.2174/1573405616666200103094611 ◽

2020 ◽

Vol 16 (9) ◽

pp. 1105-1110

Author(s):

Büyük Kaan Orhan ◽

Dilek Yılmaz ◽

Mehmet Ozgur Ozemre ◽

Kıvanç Kamburoğlu ◽

Orhan Gulen ◽

...

Keyword(s):

Statistical Significance ◽

Third Molar ◽

Mandibular Canal ◽

Third Molars ◽

Second Molar ◽

The Third ◽

Impacted Mandibular Third Molar ◽

Mandibular Third Molar ◽

The Relationship ◽

Molar Region

Objectives: To evaluate impacted mandibular third molar tooth region and obtain linear measurements using CBCT images and to assess the relationship between the impacted third molar and the mandibular canal. Methods: CBCT scans of 351 patients (208 females, 143 males) were assessed. Age, gender, and impaction site were recorded for each patient. The relationship of third molars with the vertical axis of second molars, 2nd molar resorption and the relationship between third molar apices and the mandibular canal were assessed. In addition, the distance between ramus and second molar, mesiodistal width of the third molar, the angle between third molar and second molar, and width of the third molar capsule were measured. Binary Logistic Regression, Chi-Square Test, and General Linear Model were used for statistical analysis. Results: The highest percentage of impaction was found for mesioangular followed by transversal and vertical. The transversal impacted third molars revealed a significant association with adjacent second molar root resorption (p<0.001). There was a statistical significance between the second molar resorption and distance between ramus and second molar (p<0.001). The mesioangular impacted third molars revealed significant relation with the mandibular canal (p<0.05). The most frequent variation found was the dental canal followed by the retromolar canal. In general, higher measurement values were obtained for men when compared to women (p<0.05). Conclusion: CBCT assessment of the third molar region provided useful information regarding impacted mandibular third molar surgery operations.

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Comparison of Orthopantomography and Computed Tomography Image for Assessing the Relationship between Impacted Mandibular Third Molar and Mandibular Canal

The Journal of Contemporary Dental Practice ◽

10.5005/jp-journals-10024-1235 ◽

2012 ◽

Vol 13 (6) ◽

pp. 819-823 ◽

Cited By ~ 1

Author(s):

Uma Shankar ◽

KR Hari ◽

T Praveen Kumar Reddy ◽

Shravan Kumar Katakam ◽

Deepti Janga

Keyword(s):

Computed Tomography ◽

Third Molar ◽

Mandibular Canal ◽

Impacted Mandibular Third Molar ◽

Mandibular Third Molar ◽

Significant Difference ◽

Tomography Image ◽

Computed Tomography Image ◽

Relationship Of ◽

The Relationship

ABSTRACT Background Permanent mandibular third molar are most commonly impacted teeth. In planning the surgical removal of mandibular third molar, correct diagnosis requires not only their precise spatial location, but also a thorough and accurate assessment of the intimate relationship with adjacent anatomical structures. Various imaging modalities have been used for localizing the mandibular third molar but not satisfactorily. Aim This prospective study of 30 patients with 42 impacted mandibular third molars was carried out with the aim of finding evidence for justifying the use of computed tomography and orthopantomography as a diagnostic modality, prior to surgical intervention of impacted mandibular third molar. Materials and methods Subjective evaluation of the CT and OPG images by two observed had shown that there was significant difference between the CT and OPG for radiographic visibility of mandibular canal in relation to third molar. Results Data analysis was done with Chi-square test (χ2) and z-test to find the significant difference between the two radiographic modalities OPG and CT in localizing special relationship of impacted mandibular third molar. The comparison of OPG and CT showed z-value >1.5 in darkening of roots (1.98), deflection of root (2.00) interruption of z-value = 0 in narrowing of canal and dark, bifid apexes. Also it showed p-value <0.05 in all the radiographic signs except narrowing of mandibular canal and and dark and bifid apexes. Conclusion The spiral CT image provides a unique opportunity to determine the exact position of impacted mandibular third molar and their relationship to adjacent structure in all three planes. Clinical significance Computed tomography is highly instrumental in depicting the relationship of mandibular third molar with inferior alveolar nerve canal before treatment and accurate appraisal of the several aspects can be made regarding prognosis. How to cite this article Katakam SK, Shankar U, Thakur D, Reddy TPK, Hari KR, Janga D. Comparison of Orthopantomography and Computed Tomography Image for Assessing the Relationship between Impacted Mandibular Third Molar and Mandibular Canal. J Contemp Dent Pract 2012;13(6):819-823.

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