scholarly journals Kajiansudut inklinasi gigi molar ketiga rahangbawahpre-erupsi pada kelompok umur14 -17 tahun(The pre-eruptedstudyof mandibular thirdmolar inclinationamong 14 to 17 year old)

2014 ◽  
Vol 13 (2) ◽  
pp. 95
Author(s):  
Nurlailia DS ◽  
Mei Syafriadi
Keyword(s):  
Third Molar ◽  
Population Group ◽  
Age Group ◽  
Second Molar ◽  
Group Iii ◽  
The Third ◽  
Tooth Impaction ◽  
Molar Teeth ◽  
To Come ◽  
Ray Projection

At the beginning of the growth, tooth inclination is mesioangular, then move gradually to come into contact with thedistal surface of the second molar and further commit to sliding movement parallel to second molar axis. This positionwill be retained to achieve the eruption way to oral cavity. However, the last decade reported incidence increasedimpaction of the third molar teeth in the lower jaw. This study was aimed to study the level of pre-eruption of mandibularthird molar in the population group aged 14-17 years to predict the risk of tooth impaction or not. Differentiatedpopulations on cluster I, age 14-15 years old; group II, 15.1-16 years old; and group III 16.1-17 years old. Researchcarried out by clinical observation and measurement of at Department of Radiology in Jember University with 48people selected based on predetermined criteria. X-ray projection was exposed by paralleling technique on the lowerthird molar teeth, left and right. The results showed 43.75% of 14-15 year old group had the third molar angle interval50-56°; 15.1-16 year age group, 80% have 57-70° angle interval, and 16.1-17 years age group, 46.67% has angularinterval 64-70°. It was concluded that a large interval of the third molar angle increase due to the increased of age,and the angle is different between groups based on gender.

scholarly journals Evaluation of the position of mandibular third molar hidden teeth and its effect on second adjacent molar teeth in panoramic radiography in patients referring to Birjand Dental School in 2018-19

2020 ◽  
pp. 76-84
Keyword(s):  
Root Resorption ◽  
Panoramic Radiography ◽  
Third Molar ◽  
Molar Tooth ◽  
Second Molar ◽  
The Third ◽  
External Root Resorption ◽  
Mandibular Third Molar ◽  
Class B ◽  
Molar Teeth

Background and Aim: The third molar tooth lies with symptoms such as periodontal problems, caries, crowding, root resorption, cyst and tumor formation of the adjacent second molar. This study was to evaluate the position of mandibular third molar teeth and its effect on second adjacent molar teeth. Materials and Methods: Panoramic radiography was obtained from 264 patients with mandibular third molar hidden teeth referred to the Birjand School of Dentistry in 2018. The material and direction of their placement and the vertical position of the third molar tooth (based on the PELL & Gregory classification) and its placement angle (based on Winter classification) were determined. Also, the prevalence of distal caries, external root resorption, the amounts of displacement, t inflammatory lesions and the cystic was examined in the adjacent second molar tooth. Data were analyzed using SPSS software (Version 19), and Chi-square statistical test, p-values less than 0.05 were considered as statistically significant. Results: The data from this study showed that most of the wisdom hidden teeth were in Class B and III of Pell and Gregory classification, had Mesial angle based on Winter classification. In 20.8% of patients with caries, there was 3% root canal resorption and 1.1% displacement of the second molar tooth, while no cases of inflammatory and cystic lesions in the second molar tooth were found due to the hidden third molar tooth. The Mesial and horizontal angles of impacted wisdom teeth were associated with increased risk of caries and root resorption of the second molar. Also, Class B's third molar teeth increased caries in second molar teeth. Conclusion: Most pathological problems were observed in Mesial, horizontal, and class B impaction. According to the observed relationship, it seems that the angle and depth of the hidden third molar should be taken into account c when deciding whether or not to extract it.

scholarly journals Assessment of the Retromolar Canal in Taiwan Subpopulation: A Cross-Sectional Cone-Beam Computed Tomography Study in a Medical Center

Tomography ◽  
2021 ◽  
Vol 7 (2) ◽  
pp. 219-227
Author(s):  
Yen-Wen Shen ◽  
Wan-Chun Chang ◽  
Heng-Li Huang ◽  
Ming-Tzu Tsai ◽  
Lih-Jyh Fuh ◽  
...  
Keyword(s):  
Medical Center ◽  
Third Molar ◽  
Mandibular Canal ◽  
Cone Beam ◽  
Horizontal Distance ◽  
Taiwanese Population ◽  
Mandibular Bone ◽  
Second Molar ◽  
The Third ◽  
Retromolar Canal

The retromolar canal is an anatomical variation that occurs in the mandibular bone. The retromolar canal typically originates in the mandibular canal on the distal side of the third molar and extends forward and upward to the retromolar foramen (RMF), which contains the neurovascular bundle. Accidentally damaging the neurovascular bundle in the retromolar canal during the extraction of the third molar, dental implant surgery, or maxillofacial orthognathic surgery may lead to subsequent complications such as incomplete local anesthesia, paresthesia, and bleeding during operation. The objective of this study was to investigate the prevalence of the RMF in the Taiwanese population in a medical center by using dental cone-beam computed tomography (CBCT) and to identify the position of the RMF in the mandibular bone. The dental CBCT images for the mandibular bone of 68 hemi-mandible were uploaded to the medical imaging software Mimics 15.1 to determine the prevalence of the RMF in the Taiwanese population and the three positional parameters of the RMF in the mandibular bone: (1) The diameter of the RMF, (2) the horizontal distance from the midpoint of the RMF to the distal cementoenamel junction of the second molar, and (3) the vertical distance from the midpoint of the RMF to the upper border of the mandibular canal. Seven RMFs were observed in the 68 hemi-mandibles. Thus, the RMF prevalence was 10.3%. In addition, the diameter of the RMF was 1.41 ± 0.30 mm (mean ± standard deviation), the horizontal distance from the midpoint of the RMF to the distal cementoenamel junction of the the second molar was 12.93 ± 2.87 mm, and the vertical distance from the midpoint of the RMF to the upper border of the mandibular canal below second molar was 13.62 ± 1.3487 mm. This study determined the prevalence of the RMF in the Taiwanese population in a medical center and its relative position in the mandibular bone. This information can provide clinicians with a reference for posterior mandible anesthesia and surgery to ensure medical safety.

scholarly journals The Anatomical Position and Size of Greater Palatine Foramen and Canal in an Iranian Sample Using Cone Beam Computed Tomography

2021 ◽  
Author(s):  
Solmaz Valizadeh ◽  
Seyedeh Mahshid Ahmadi ◽  
Mitra Ghazizadeh Ahsaie ◽  
Zahra Vasegh ◽  
Navid Jamalzadeh
Keyword(s):  
Computed Tomography ◽  
Average Length ◽  
Third Molar ◽  
Cone Beam ◽  
P Value ◽  
Second Molar ◽  
Anatomical Position ◽  
The Third ◽  
Greater Palatine Foramen ◽  
The Right

Abstract IntroductionDetection of exact location of greater palatine foramen and its anatomical variations are vital prior to posterior maxillary surgeries and gingival grafts. The aim of this study is to determine the anatomical position and size of the greater palatine canal (GPC) and foramen (GPF) using cone beam computed tomography (CBCT) scans.Materials and methodsIn this descriptive-analytic study, CBCT images of 148 patients were assessed. To determine the anatomical foramen position, the posterior maxilla area was divided into five regions on the axial view (A: from the mesial surface of the second molar to the center of the second molar, B: from the center of the second molar to its distal, C: from the mesial surface of the third molar to the center of the third molar, D: from the center of the third molar to the distal of the third molar, E: distal to the third molar.). The length of the canal was investigated on both coronal and sagittal views. Independent and paired T-test were used to analyze the data.ResultsAmong 80 females -68 males, the anatomical position of the GPF was mainly located in region E on the left (55%) and the right (50%), and then, respectively, in region D and region C. The mean diameter of GPF was 4/48 mm on the left and 4/63 mm on the right side (P-value = 0/01). The average length of the canal on the coronal view was 29.46 mm on the left side and 29.75 mm on the right (P-Value = 0/005). The average length of the canal on the sagittal view was 29.62 mm on the left and 30.02 mm on the right (P-value = 0/001).ConclusionThe anatomical position of the GPF was primarily located distal to the third maxillary molar. CBCT is a valuable diagnostic tool for evaluation of vital anatomic landmarks in the maxillofacial region prior to surgeries and interventions.

A longitudinal study on timing and velocity of rat molar eruption: Timing of rat molar eruption

2018 ◽  
Vol 52 (4) ◽  
pp. 394-401 ◽  
Author(s):  
Balazs J Denes ◽  
Aikaterini Lagou ◽  
Domna Dorotheou ◽  
Stavros Kiliaridis
Keyword(s):  
Mixed Model ◽  
Third Molar ◽  
Mandibular Canal ◽  
Reference Points ◽  
Micro Computed Tomography ◽  
Eruption Rate ◽  
Second Molar ◽  
Mixed Model Analysis ◽  
The Third ◽  
Rat Molar

Rat molar eruption and occlusion data were compiled from several studies but several inconsistencies were found, rendering the planning of eruptional studies difficult and imprecise. Our aim was to measure eruption and occlusion days, as well as eruption velocity, in the upper and lower three molars from infancy to end of adolescence in the rat. A total of 19 male and female Wistar rats were scanned daily by micro-computed tomography (CT) from day 15 to 70. We measured the eruption of all maxillary and mandibular molars with reference points at the hard palate and mandibular canal at three stages: pre-emergent, pre-occlusal, and functional. Statistical analysis was performed with a mixed-model analysis of variance (ANOVA) and a Sidak post hoc test. The first molar erupts on average on day 17, the second molar on day 20, and the third molar on day 33. The eruption velocity of the first molar was the highest at 90.9 microns/day (standard error (se) = 12.80), followed by the second molar at 65.9 microns/day (se = 5.80), and the lowest was the third at 47.0 microns/day (se = 3.28), ( p < 0.001). On average, the pre-occlusal phase had the highest velocity at 97.2 microns/day (se = 1.72), the pre-emergent was lower at 84.9 (se = 2.29), and the functional was the lowest at 21.7 (se = 0.45), ( p < 0.001). The eruption rate decreased from the first to third molar and was also different between phases: the pre-occlusal phase had the highest rate, closely followed by the pre-emergent phase while the functional eruption rate was significantly lower than the other phases.

The Oblique Lateral Jaw Radiograph

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.

scholarly journals Prevention of Periodontal Pocket Formation after Mandibular Third Molar Extraction Using Dentin Autologous Graft: A Split Mouth Case Report

2020 ◽  
Vol 2020 ◽  
pp. 1-7 ◽  
Author(s):  
Alberto De Biase ◽  
Giulia Mazzucchi ◽  
Dario Di Nardo ◽  
Marco Lollobrigida ◽  
Giorgio Serafini ◽  
...  
Keyword(s):  
Case Report ◽  
Third Molar ◽  
Periodontal Pocket ◽  
Pocket Depth ◽  
Second Molar ◽  
The Third ◽  
Third Molar Extraction ◽  
Probing Pocket Depth ◽  
Surgical Extraction ◽  
A Minor

Surgical extraction of the third molar can often result in the development of a periodontal pocket distal to the second molar that could delay the healing, and the socket could be colonized by bacteria and lead to secondary abscesses, or it may cause mobility or hypersensitivity. The aim of this case report is to assess the efficacy of a dentin autograft in the prevention of periodontal dehiscences after the surgical extraction of the third molar, obtained by the immediate grinding of the extracted tooth. A healthy 18-year-old male patient underwent surgery of both impacted mandibular molars: right postextractive socket was filled with grinded dentin; then, the left one was filled with fibrin sponge. The patient was followed up for six months, and clinical and radiographic assessment were performed: measurements of plaque index (PI), bleeding on probing (BOP), gingival index (GI), clinical attachment level (CAL), and probing pocket depth (PPD) were done before surgery and repeated at 90 and 180 days after the extractions. Measurements made at six months after the surgery revealed that the grafted site was characterized by a minor depth of the pocket if compared with the nongrafted site, with no clinical/radiographic signs of complications.

The Criteria for Lower Second Molar Extraction

1987 ◽  
Vol 14 (1) ◽  
pp. 1-9 ◽  
Author(s):  
J. T. Dacre
Keyword(s):  
Selection Criteria ◽  
Third Molar ◽  
Second Molar ◽  
The Third ◽  
The Right ◽  
Molar Extraction

The benefits of lower second molar extraction are substantially reduced if the third molar fails to erupt into a satisfactory position. The selection criteria offered by the literature have been tested in a sample of 51 patients. Prediction is uncertain and cases should be followed until such time as a satisfactory third molar position has been achieved. Failure may be unilateral and more often on the right side. The need for follow-up treatment is subjective but may be as many as one in the patients.

scholarly journals Age features of the teething of wisdom at persons of military age

2018 ◽  
Vol 20 (1) ◽  
pp. 121-126
Author(s):  
N V Korovin ◽  
G A Grebnev ◽  
A K Iordanishvili
Keyword(s):  
Military Service ◽  
Orthodontic Treatment ◽  
Third Molar ◽  
Molar Tooth ◽  
Second Molar ◽  
Essential Value ◽  
Wisdom Teeth ◽  
Molar Teeth ◽  
Age Features ◽  
The Military

Pathology of an eruption of wisdom teeth is importance for a military odontology because the vast majority of the military contingents on age coincides with time of their physiological eruption (16-40 years). In work, on the basis of clinic-radial methods of a research, features of a teething of wisdom at young people of military age are studied and analyzed 3D-tomograms and orthopantomograms of 325 servicemen aged from 18 up to 27 years. During work estimated existence of wisdom teeth on top and lower jaws, extent of their eruption, existence of a retention (or dystopias) and also an adentia or loss of wisdom teeth. It was established that most often eruption of the third molar teeth of jaws at recruits occurs at the age of 23-27 years, at the same time at a series of recruits eruption of the lower wisdom teeth usually is followed by various complications, such as pericoronitis, an acute purulent periostitis of a mandible, a false «acute periodontitis» of the lower second molar tooth that becomes perceptible at mesial shift of a wisdom tooth and dense contact of its coronal part with a distal root of the second molar tooth. The essential value for a full-fledged teething of wisdom has their situation in an alveolar process (part) of a jaw, and further - in dentition. It in many respects defines a clinical picture of the shown eruption complications and also tactics of stomatologic treatment - orthodontic treatment, surgical treatment or their combinations. The infectious and inflammatory complications bound to the complicated their eruption (85,93% of cases) served as the reasons of an exodontia of wisdom. In 14,07% of cases wisdom teeth on both jaws were extracted in a planned order in connection with the forthcoming orthodontic treatment on elimination of dentoalveolar anomalies. Thus, terms and features of a teething of wisdom at recruits need to be considered in clinical practice of a military odontology as their military service can pass in specific living conditions and activity of troops and health service, and at complications of a teething of wisdom the acute stomatologic surgical management, including stationary is in most cases necessary.

scholarly journals Pain Sensation: Infrequent Case of Root Resorption of the Lower Second Molar Root with Bone Regeneration after Impacted Third Molar Removal

2021 ◽  
Vol 10 (02) ◽  
pp. 116-119
Author(s):  
Chandrashekhar Pandey ◽  
Bishwa Prakash Bhattarai ◽  
Manop Khanijou ◽  
Pimolmas Na Songkla ◽  
Natthamet Wongsirichat ◽  
...  
Keyword(s):  
Bone Regeneration ◽  
Root Resorption ◽  
Case Reports ◽  
Third Molar ◽  
Pain Sensation ◽  
Impacted Tooth ◽  
Second Molar ◽  
Impacted Third Molar ◽  
Surgical Extraction ◽  
Molar Teeth

AbstractThere have been infrequent case reports of bilateral root resorption in the lower second molar secondary from impacted third molar removal with bone regeneration without pain. Root resorption is commonly observed during third molar surgical impaction that affects mandibular second molars. The bone regeneration into the adjacent affected tooth is evident simply after the surgical extraction of the impacted tooth. However, there have been a few previous reports on the prognosis of the remaining resorbed tooth. Most dentists often choose to extract them when damaged if root resorption is observed. This report case involved bilateral root resorption of the lower second molar due to lower adjacent impacted third molar teeth and bone regeneration without pain sensation. After surgical extraction of bilateral lower impacted third molar teeth, the remaining teeth retained vital pulp and survived as functional teeth.

scholarly journals Molar space closure: To do or not to do?

2021 ◽  
Vol 0 ◽  
pp. 1-8
Author(s):  
Nutthakarn Ratanasereeprasert ◽  
Chu-Yin Weng ◽  
Stella Ya-Hui Yang ◽  
Yi-Jane Chen ◽  
Chung-Chen Jane Yao
Keyword(s):  
Treatment Planning ◽  
Treatment Plan ◽  
Treatment Options ◽  
Third Molar ◽  
Case Series ◽  
Space Management ◽  
Second Molar ◽  
The Third ◽  
Space Closure ◽  
Permanent Molars

Missing or compromised permanent molars can complicate orthodontic treatment planning and mechanics. Molar extraction should be considered in appropriate situations, but clinicians must decide between closing and regaining the edentulous space. Several factors should be taken into consideration to achieve appropriate molar space management, such as the need for space, asymmetry, periodontal status, sinus pneumatization, and the terminal molar position. Herein, three sample cases are reported to demonstrate the treatment options for molar space closure and maintenance with these factors taken into consideration during treatment planning. The understanding of mechanics played a crucial role in anchorage preparation and side effect prevention. If the third molar substitution was managed in advance and adequate space between the ramus and third molar was obtained via second molar protraction, the tooth spontaneously erupted in a favorable position without requiring further treatment. This case series can aid clinicians in molar space management. Regardless of whether the space is to be closed or regained, the treatment plan should conform to the patient’s expectations and improve occlusion with minimal side effects and treatment duration.

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