scholarly journals VARIOUS LOCATIONS OF THE THIRD MOLARS IN THE LOWER JAW

2019 ◽  
Vol 55 (1) ◽  
pp. 118-124
Author(s):  
Iryna Palianytsia ◽  
◽  
Bogdan Chekh ◽  
Zoryana Masna
Keyword(s):  
Third Molars ◽  
The Third ◽  
Lower Jaw

The Development of an Inherited Tooth Defect in the Mouse

Development ◽  
1962 ◽  
Vol 10 (2) ◽  
pp. 202-211
Author(s):  
M. S. Grewal
Keyword(s):  
Inbred Strain ◽  
Normal Mouse ◽  
Strain Differences ◽  
Third Molars ◽  
Wild Mice ◽  
The Third ◽  
Lower Jaw ◽  
Genetical Control

The normal mouse has three molars in each jaw. Of these, the third is by far the smallest. Indeed, it is not constant, and its absence in wild mice from widely separated localities has been reported by various authors (Barrett-Hamilton, 1910; Searle, 1958; Deol, 1958; Harland, 1958; Herold & Zimmermann, 1960; Berry, unpublished). Absence of third molars occurs in varying frequencies in most mouse populations which have been adequately sampled, and usually the upper rather than the lower third molars are more strongly affected. Absence ofthird molars (predominantly in the lower jaw) occurs frequently (about 18 per cent.) in the CBA/Gr inbred strain of mice (Grüneberg, 1951) and less commonly (about 3 per cent.) in the A/Gr strain (Searle, 1954a), but it is virtually absent from the C57BL/Gr strain of mice. These inter-strain differences are evidence that the condition is, to some extent at least, under genetical control

scholarly journals DEVIATIONSIN THE POSITION OFTHETHIRD MOLARS

2020 ◽  
Vol 10 (4) ◽  
pp. 156-162
Author(s):  
Nataliia Pankratova ◽  
Mikhail Postnikov ◽  
Aziza Khasbolatova ◽  
Tatiana Repina ◽  
Anastasiia Rodionova ◽  
...  
Keyword(s):  
Spatial Arrangement ◽  
Optimal Shape ◽  
Urgent Problem ◽  
Third Molars ◽  
The Third ◽  
Lower Jaw ◽  
Formation Stage ◽  
The Face ◽  
Upper Jaw ◽  
And Function

Timely teething is one of the most important indicators of the harmonious development of the dentoalveolar system, which is determined by the correct (physiological) position of the teeth in the dentition, ensuring the optimal shape and function of the temporomandibular joint, the work of the chewing muscles, the height of the lower part of the face, and aesthetics of a smile. Retention of individual teeth is often the reason for the formation of anomalies in the dentition, their closure, functional and aesthetic disorders. An urgent problem in modern dentistry is the problem associated with the development of third molars. According to the results of the analysis of 3000 orthopantomograms of the jaws of patients 7–25 years old with dentoalveolar anomalies, the spatial arrangement of the primordial of the third molars relative to the buttresses of the upper and lower jaws was studied. It was found that the buttresses on the upper jaw are vertical and do not interfere with the correct eruption of the third molars. The buttresses located near the primordial of the third molars on the lower jaw contribute to the retention of the third molars due to the change in inclination during the formation stage.

scholarly journals Prediction of eruption of the lower third molars depending on their position relative to the “stress axis”

2021 ◽  
Vol 18 (4) ◽  
pp. 474-482
Author(s):  
A. A. Khasbolatova ◽  
N. V. Pankratova ◽  
M. A. Postnikov ◽  
S. P. Rubnikovich ◽  
T. V. Repina ◽  
...  
Keyword(s):  
Diagnostic Method ◽  
Diagnostic Techniques ◽  
Stress Axis ◽  
Third Molars ◽  
X Ray ◽  
Gonial Angle ◽  
The Third ◽  
Modified Method ◽  
Lower Jaw ◽  
Panoramic Images

The article discusses the important problem of the presence and location of the primordia of third molars and the possibility of their eruption without affecting the dentition. The problem is relevant and is being studied by domestic and foreign specialists from different angles with the use of various diagnostic techniques. This article is based on the analysis of the most accessible and most frequently used X-ray diagnostic method – the panoramic X-ray.The aim was to study the prediction of eruption of the lower third molars depending on their position relative to the “stress axis”.84 panoramic images of the patients aged 12‒25 years were analyzed. To study the OPTG, the method of Fishchev et al. (2012), which determines the position of the lower third molars relative to the “stress axis”, and Demirjian’s modified method (1973), which determines the stage of their formation, were used. The data were processed statistically.The results are presented in tables and diagrams, as well as in correlations. Their interpretation is discussed. These data allowed us to draw conclusions about a significant change only in the angle of inclination and the stages of formation of the roots of the third molars of the lower jaw, about the absence of changes in the gonial angle and the position of the studied teeth with age. At the same time, it was found that the location of the coronal part of the third molars below the “stress axis” does not worsen the prediction of their eruption.

scholarly journals Evaluation of Panoramic Radiographs in Relation to the Mandibular Third Molar and to Incidental Findings in an Adult Population

2020 ◽  
Author(s):  
Josefine Cederhag ◽  
Nina Lundegren ◽  
Per Alstergren ◽  
Xie-Qi Shi ◽  
Kristina Hellén-Halme
Keyword(s):  
Incidental Findings ◽  
Adult Population ◽  
Inferior Alveolar Nerve ◽  
Third Molar ◽  
Patient Positioning ◽  
Vertical Position ◽  
Surgical Removal ◽  
Third Molars ◽  
Panoramic Radiographs ◽  
The Third

Abstract Objectives The aim was to evaluate the characteristics of the mandibular third molars, especially in relation to the inferior alveolar nerve. Further aims were to investigate incidental findings in panoramic radiographs in an adult population, and to investigate image quality related to patient positioning. Materials and Methods From a previous study with 451 randomly selected adult participants who lived in Sweden, 442 panoramic radiographs from four dental public health clinics were used. The third molars’ characteristics and relation to inferior alveolar nerve were evaluated. Incidental findings and patient positioning were recorded. Statistical Analysis Frequency analysis was used to investigate the occurrence of all findings and their possible interconnections. Whether the patients’ age or gender had an impact or not was also analyzed. Results The third molars were erupted in vertical position among 73% regardless of age. When retained or semi-retained, they were most commonly in mesioangular positions. The inferior alveolar nerve was located inferior to the roots in 52%, whereas an overlapped position was most common if the third molar was retained (90%), semi-retained (83%) or the age was less than 30 years (66%). Common incidental findings were apical radiolucencies, idiopathic osteosclerosis, and tooth fragments. Suboptimal patient positioning was found in one-third of the radiographs. Conclusions Panoramic radiography is a useful method to evaluate third molar prior to surgical removal and may be the only image required. Most incidental findings on panoramic radiographs does not seem to require any further odontological management.

Dental age estimation from the developmental stage of the third molars in western Chinese population

2012 ◽  
Vol 219 (1-3) ◽  
pp. 158-164 ◽  
Author(s):  
Guo Li ◽  
Jiayin Ren ◽  
Shuping Zhao ◽  
Yuanyuan Liu ◽  
Na Li ◽  
...  
Keyword(s):  
Developmental Stage ◽  
Age Estimation ◽  
Chinese Population ◽  
Dental Age ◽  
Third Molars ◽  
Dental Age Estimation ◽  
The Third

scholarly journals Evaluation of Hemodynamic Cerebral Disordersin Patients Subjected to the Third Molar Extraction.Evaluation of the Effectiveness of OsteopathicRehabilitation after Tooth Extraction

2016 ◽  
pp. 60-66
Author(s):  
А. . Atyakshev ◽  
N. . Tekoutieva
Keyword(s):  
Tooth Extraction ◽  
Third Molar ◽  
Cerebral Hemodynamics ◽  
Third Molars ◽  
The Third ◽  
Upper Jaw ◽  
Rehabilitation Measures

Extraction of the third molars from the upper jaw can cause somatic dysfunctions and changes in cerebral hemodynamics in patients. Rehabilitation measures aimed to correct somatic dysfunctions and restore cerebral hemodynamics are necessary for these patients.

scholarly journals A study of mandibular angle fractures caused by sports and relation to the position of the third molars.

1997 ◽  
Vol 43 (2) ◽  
pp. 86-89
Author(s):  
Takehisa YAMADA ◽  
Yoshihiro SAWAKI ◽  
Iwai TOHNAI ◽  
Manabu TAKEUCHI ◽  
Minoru UEDA
Keyword(s):  
Third Molars ◽  
Mandibular Angle ◽  
The Third ◽  
Angle Fractures

scholarly journals Periodontal status of the second molar adjacent to the third mandibular molar

2020 ◽  
pp. 1-11
Author(s):  
Katherine Luzuriaga ◽  
Santiago López Jurado
Keyword(s):  
Bone Loss ◽  
X Rays ◽  
Third Molars ◽  
Periodontal Status ◽  
Second Molar ◽  
The Third ◽  
Probing Depth ◽  
Mandibular Molar ◽  
Mandibular Third Molars ◽  
Transversal Study

Third molars have an unusual eruption pattern. Studies suggest that, due to the position and angulation of these, various pathologies could occur in the adjacent molars, such as periodontal problems and the appearance of distal caries. The objective of this work is to describe the periodontal status of mandibular second molars adjacent to mandibular third molars. For this, a descriptive transversal study was carried out. We worked with a sample of 277 patients that went to the Dental UCSG Clinic to have their third molars extracted in the period A-2018. An intraoral clinical examination was performed, and the following variables were observed: probing depth, gingival state, and presence of caries in mandibular second molars. In addition, panoramic x-rays of the patients were reviewed to determine the position of the third mandibular molar and the level of the distal bone crest of the second molars. The results showed that the depth of distal probing of the mandibular second molars were normal (from 1 to 3mm) in 31% of the cases, while in 69% depths greater than 3mm were found. Regarding the presence of bone loss, in 43% of the cases there was no loss, in 35% of the cases there was a slight loss, 22% presented moderate loss and only 1% had severe loss. The presence of mandibular third molars significantly affects the periodontal status of the adjacent second molar, which can lead to periodontal pockets, bone los sand caries in their distal area.

scholarly journals HYPODONTIA WITH CLASS I MALLOCLUSION AND MAXILLARY DIASTEMA

2018 ◽  
Vol 1 (2) ◽  
pp. 98
Author(s):  
Bunga Fatimah ◽  
I Gusti Aju Wahju Ardani
Keyword(s):  
Case Management ◽  
Class I ◽  
Tooth Agenesis ◽  
Third Molars ◽  
Missing Teeth ◽  
Facial Aesthetics ◽  
The Third ◽  
Congenitally Missing Teeth ◽  
Congenitally Missing ◽  
Severe Type

Background: Dental agenesis is a term that refers to the absence of one or more teeth, and hypodontia refers to a severe type of tooth agenesis involving less than six or more than one congenitally missing teeth, excluding the third molars. Purpose: This aimed to report the correction of overbite by using intrusion archwires. Case: A 20-year-old female patient had class I malocclusion and deep overbite, incisor retroclination, mild mandibular crowding and agenesis of 12, 13, 14, 15, and 24. Case management: The case was treated with non-extraction using 0.022 pre-adjusted technique to level and unravel using intrusion archwires to correct the deep overbite. Conclusion: The 17-month treatment resulted in a corrected overbite, good occlusion, and good facial aesthetics.

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