Prevalence Of Impacted Third Molars Research Articles

Prevalence and patterns of third molar impaction among Ethiopians in Addis Ababa: a retrospective pilot study

Tooth impaction is a condition in which a tooth does not reach its normal position and is often observed in the third mandibular molar due to inadequate space. This study aimed to investigate the prevalence and configuration of the impacted third molars with an emphasis on angular orientations in a sample of the Ethiopian population. This cross-sectional study included a retrospective analysis of 291 patient records and orthopantomography data from the archives of a private dental clinic in Addis Ababa, during the study period from December 2020 to November 2022. Demographic details and data on the position and level of the impacted third molars were evaluated using the Winter classification. Data were analyzed for frequency distribution. The prevalence of impacted third molars was 22% (n = 64), with a greater incidence on the right side (60.9%) and a higher frequency in the mandible (67.2%). Vertical angulation (32.8%), followed by mesioangular angulation (31.2%), was the most common impaction pattern. The results highlight the need for improved treatment protocols for third molar impaction, emphasizing the prevalence in the mandible and the importance of addressing vertical impaction. Regular dental check-ups are essential for assessing third molar impaction and planning appropriate management. These data can inform policymaking and treatment considerations for impacted third molars in the Ethiopian population.

Prevalence of Impacted Third Molars Among Iraqi Patients Attending Al-Maghrib Specialized Dental Health Center in Relation to Age and Gender Using Panoramic Radiographs

Introduction: The most commonly impacted tooth is third molar. Aim: To investigate the prevalence of pattern of third molar impaction among patients attending Al-Maghrib specialized dental health center in Baghdad city. Materials and Methods: A cross-sectional analysis was conducted on digital orthopantomogram (OPGs) of high quality belonged to 519 patients referred to Al-Maghrib specialized dental health center in Baghdad city/Iraq between January2023 to June 2023. Data include age, gender and angulation type. Results: The age range was 20-70 years old. The prevalence of impacted third molar was 92%. The percentage of impacted lower third molar (51%) was higher than that of upper third molar (49%). Middle-aged patients (20-30, 31-40 years) recorded higher percentages of impaction than other age groups (31.7% and 32% respectively). Male gender revealed higher percentage (58%) of impaction than female gender (42%). Vertical and then mesioangular inclinations are the most prevalent types of lower third molar angulations (45% and 30% respectively). Conclusion: Higher prevalence of impaction in third molars was recorded in the current study that was more prevalent in the middle-aged patients with male predilection. The impaction was more common in the mandible than the maxilla. The most prevalent lower third molar angulation is vertical followed by mesioangular.

Prevalence of impacted third molars among different sagittal skeletal relationships in Upper Egyptian patients

Prevalence of impacted third molars among different sagittal skeletal relationships in Upper Egyptian patients

Assessment of the Relation Between Patterns of Third-Molar Impaction and Blood Group: A Retrospective Study.

Background The prevalence of impacted third molars is high in the global general population. The etiology of impacted third molars is not fully understood, but it is thought to result from combined genetic and environmental factors. Some studies have suggesteda link between the blood group and the risk of impacted third molars. This study aimed to investigate the association between the blood group and the presence of impacted third molars and its pattern. Method A total of 856 panoramic radiographs were included in the study. Thethird molars were evaluated for the pattern of third-molar impaction and blood characteristics recorded as ABO group and presence or absence of Rhesus antigen. Results The results showed no significant association between the blood group and the presence of impacted third molars. The prevalence of at least one impacted the third molar was 34.6%. The most common angulation of impacted third molars was vertical (V) (45.1%), followed by mesioangular (MA) (33.7%), distoangular (DA) (13.8%), and horizontal (H) (7.4%). There was no significant association between the blood group and the number of impacted third molars nor between the blood group and the angulation of the impacted third molars. Conclusion This study suggests that the blood group is not a major factor in the development of impacted third molars. However, further studies with larger sample sizes are needed to confirm these findings.

Analysis of mandibular third molar impaction classification with different skeletal malocclusions

Background: Since the third molar teeth are the last to erupt in the oral cavity, they can become more impacted than other teeth. Insufficient retromolar space and the eruption direction of the third molars can affect this situation. The condition, distribution, and prevalence of impacted third molars in skeletal Class I, II, and III anomalies are important in treatment predictability. Purpose: The aim of this study is to classify impacted lower third molars in patients with different skeletal malocclusions. Methods: This retrospective study examined panoramic X-ray records of patients treated at Inonu University Faculty of Dentistry, Department of Orthodontics, between 2014 and 2021. In total, 1219 mandibular third molar teeth were considered. Impacted mandibular third molar teeth of individuals with different skeletal structures were grouped according to the Pell and Gregory, Winter, and Archer classifications. Results: In this study, 37.74% of the participants were male, and 62.26% were female; 40.94% of examined teeth were skeletal Class I, 41.84% were Class II, and 17.23% were Class III. It was determined that 91.63% of all examined teeth were impacted, and 8.37% had erupted. According to the Pell and Gregory classification, 21.41% of teeth were Grade (I), 38.06% were Grade (II), and 40.53% were Grade (III). According to the Winter classification, 3.12% of examined teeth were buccal, 6.89% were horizontal, 23.71% were mesioangular, and 66.28% were vertical. According to the Archer classification, 14.44% of examined teeth were in position A, 30.02% were in position B, and 55.54% were in position C. No statistically significant relationship was established between grades and gender (p>0.05). Conclusion: A relationship was ascertained between the impacted positions of mandibular third molars in different skeletal structures.

The prevalence association between the pattern of impacted third molars and their common hard tissues pathologies among the big Tripoli city population: A digital panoramic radiography retrospective study

Background: Third molar impaction is a prevalent condition that affects a substantial percentage of the global population, with a global prevalence ranging from 16.7% to 68.6%. 2. Nearly half of impacted third molars are associated with some form of pathology.Aim: To ascertain the prevalence of third molars that have been impacted in the large Tripoli, Libyan population, in relation to the level of eruption, the angulation of impaction, their accompanying pathologies, and associated demographic data (sex and age of the patients).Material and Methods: The 8860 digital panoramic radiographs (PRs) from the large Tripoli city population were obtained retrospectively for the current investigation. Using Microsoft Excel, the sampled PRs were assessed, and the information gathered was collated and examined (Microsoft Office 2013). The data was examined using the Chi-Square analysis technique.Results: A total sample of 8860 digital panoramic radiograph, 2077 (23.4%) cases of impacted third molars to show at least one impacted third molar. The prevalence of impacted third molars was found significantly higher in the twenties and thirties age groups (35.1%).A total of 2077 digital PRS were diagnosed with impacted third molars out of which 642 (31%) were associated with pathologies.Conclusion: This study's sample of impacted third molars demonstrated a low frequency in the large Tripoli population. Males are more prone than females to have an impaction. The most prevalent impaction patterns were mesioangular angulation, level C impaction, and class II impaction. The enlargement of the periodontal ligament space was one of the most frequent related hard tissue diseases.

Prevalence and Characteristics of Impacted Third Molars in a Kosovar Population: A Cross-Sectional Study

Background: The goal of this randomized cross-sectional study was to determine the prevalence of impacted third molars in the Kosovar population and to assess the site of impaction using the Winter and the Pell and Gregory classifications. Methods and Results: A total of 5515 digital panoramic radiographs (PANs) were reviewed to determine the number of impacted third molars, their angulation, and depth. The age range was from 18 to 77 years (29.3±12.8 years). The prevalence of impacted third molars in the sample of the Kosovar population was 73.7%. Of all PANs, one or more impacted third molars were observed in a total of 710 PANs, including 296(41.7%) in men and 414(58.3%) in women, with a sex ratio of 1:1.4; this difference was not significant (P=0.616). The mandible exhibited a substantially greater prevalence of impacted third molars than the maxilla 62.1% vs. 37.9%; P=0.001). In the mandible, significantly higher frequencies of third molar impaction were noted in the distoangular and vertical positions (36.9% and 33.5%). In the maxilla, the most common angulation of impacted third molars was mesioangular (52.8%). Most impacted third molars recorded a Class C depth of impaction (62.3%) followed by Class B (34.9%), and only 2.8% recorded a Class A depth of impaction. Conclusion: The samples of third molar impaction in the Kosovar population are characterized by a high prevalence of impaction, especially in the mandible. The most common angulation was the mesial in the maxilla as well as in the mandible. The most common level of impaction in the maxilla and mandible was level C.

Investigation of the prevalence of impacted third molars and the effects of eruption level and angulation on caries development by panoramic radiographs.

Background This study is aimed to determine the prevalence of impacted third molars and to investigate the effects of their eruption level and angulation on caries formation in the distal of the adjacent tooth.Material and Methods This cross-sectional study was conducted on panoramic radiographs of 38481 patients who were admitted to the Trakya University, Faculty of Dentistry. The panoramic radiographs of 7998 patients with at least one impacted third molar were included. Third molars were classified according to Winter’s classification and Pell and Gregory’s classification. The frequency of caries in partially impacted third molars and adjacent second molars was determined. The chi-square tests were used to determine potential associations between the third molars' level of eruption, angulation, and caries development.Results The study group consisted of 4423 females (55.3%) and 3575 males (44.7%) with a mean age of 36.3±13.4 years. The prevalence of the third molar impaction rate was 23%. The impaction pattern of partially erupted third molars was characterized by an eruption level of A with the vertical position in both jaws. Partially erupted and vertically placed maxillary third molars in the level of position A caused more caries in the adjacent tooth and mesioangularly located partially erupted mandibular third molars were associated with more caries in the adjacent tooth.Conclusions The angulation and eruption level of partially erupted third molars should be carefully examined. The prophylactic extraction of vertically and mesioangularly located third molars, especially with an eruption level of position A can be suggested to eliminate the related complications and risk of caries. Key words:Dental caries, digital radiography, impacted tooth, panoramic radiography, third molar.

Radiographic evaluation of third molar impaction: A digital panoramic stud

Background: The impaction of third molar can compromise adjacent teeth by increasing the risk of developing dentoalveolar lesions. Aims: The aim of this study was to evaluate the prevalence of impacted third molar in association to patients' demographics and its angulation among patients who visited dental clinics at the College of Dentistry, Imam Abdulrahman Bin Faisal University. Settings and Design: Retrospective radiographic study of patients visiting Dental Hospital. Subjects and Methods: Data were obtained from the dental records and digital orthopantomogram (OPG) of included study sample. Statistical Analysis: The Chi-square test was used to determine the association of impacted third molars with sex and nationality, whereas another two methods, analysis of variance, and Tukey post hoc test were applied, respectively, to establish the association of impacted third molars with the age of the patients. Results: A total of 1286 OPGs were collected and analyzed for the suitability of the study. Of these 1068 patients fulfilled the criteria for inclusion in the study, among them, 206 (19.3%) had at least one impacted third molar. Female population had a significantly high prevalence of third molars compared to male (P = 0.02). Similarly, the age of the patients was found to be significantly associated with impacted teeth (P < 0.001); also, the vertical and mesioangular impactions were found in 46.5% and 32.2% of the patients, respectively. Conclusion: The study found a low female predilection for the prevalence of third molar impaction with highest inclination at the young age that decreases with the growing age. Vertical impaction had the highest prevalence followed by mesioangular angulation.

Prevalence of impacted third molars and the reason for extraction in Saudi Arabia

PurposeThis study aims to record the current pattern of third molar impactions and relevant reasons for extraction in Riyadh, Saudi Arabia. We hypothesized that the principal reason for extraction was elective. Material and MethodsOrthopantomograms (OPG) radiographs and electronic files relating to 4000 patients were retrospectively collected from patients between the ages of 21 and 50 years old. Of these, 1014 were included in this study (514 females, 500 males). The classification was determined according to the Winter, Pell, and Gregory classification. The analysis was done using the chi-square (χ2) test, with SPSS version 25 (IBM, Inc, Chicago, IL). A p-value of < 0.05 was considered statistically significant. ResultsA total of 2240 impacted third molars were found with no gender predilection. Impaction was more commonly found in the mandible (58.5%) than the maxilla (41.5%). The most common reason for extraction was ‘asymptomatic; prophylactic indication’ (66.8%), followed by ‘symptomatic’ (33.2%). Vertical angulation was most common in the maxilla (56.5%), and mesioangular impaction in the mandible (40.5%). ConclusionThere is a high rate of third molar impaction in the central region of Saudi Arabia. It is more likely to occur in the mandible than the maxilla with no gender predilection. The majority of the patients were referred for elective asymptomatic reasons. Mesio-angular impaction is mostly found in the mandible and vertical angulation in the maxilla. Both arches had a C level depth and Class I Ramus relationship. Further studies should be conducted with the wider Kingdom of Saudi Arabia so that the population can be more accurately represented.

Prevalence of dental anomalies in a sample of orthodontic Egyptian patients using orthopantograms

Objective The aim of this cross-sectional study was to investigate the prevalence of dental anomalies in a sample of Egyptian orthodontic patients. Patients and methods This is a retrospective study where 435 digital orthopantograms taken of patients, ranging in age from 14 to 30 years with a mean age of 19 years were studied. The patients were presented for treatment at a private practice in Cairo during the period from 2017 to 2019. The orthopantograms were reviewed for impactions (including and excluding third molars), congenitally missing teeth or hypodontia (including and excluding third molars), ectopic eruption, microdontia (peg-shaped and small-sized maxillary lateral incisors), rudimentary 8's, root dilacerations and supernumerary teeth. Results Excluding third molars, the number of patients that had at least one dental anomaly was 183 or 42.1%. The prevalence of patients with impacted teeth was 66 (15.2%), while the prevalence of congenitally missing teeth was 44 (10.1%). Equal prevalence between males and females was recorded for impacted maxillary permanent canines (M = 16, F = 16) and congenitally missing maxillary permanent canines (M = 1, F = 1). The least prevalence were microdontia (n = 15, 3.4%), dilacerated roots (n = 8, 1.8%) and supernumerary teeth (n = 8, 1.8%). Rudimentary wisdom teeth count was 12 (2.8%) out of the total sample with only maxillary third molars being affected. The prevalence of impacted third molars was 25% (n = 109, M = 27, F = 82). The prevalence of congenitally missing third molars (at least one missing third molar) was 19.3% (n = 84, M = 22, F = 62). Females showed higher prevalence than males for all anomalies except for impacted mandibular permanent canines where males were higher than females (M = 9, F = 5), impacted upper incisors and upper first premolars (M = 1, F = 0) and supernumerary teeth (M = 6, F = 2). The prevalence of patients with impacted permanent second molars was 4.6%. Conclusions Excluding third molars, the most common dental anomaly was impaction followed by teeth agenesis. The most prevalent impaction was the maxillary permanent canine and the most congenitally missing teeth were the maxillary lateral incisors. Root dilacerations and supernumerary teeth were the least common anomalies. Congenitally missing and impacted third molars constitute a large segment of dental anomalies and must be evaluated separately. A large variation exists between the different populations regarding the prevalence of the various anomalies.

Theories that underlie the prevalence of third molar impaction: New theory

IntroductionThe purpose of this review was to introduce a new theory being the mechanical theory which hypothesizes that modernization is related to a reduction in the functional activities of the jaw which in turn negatively impacted the structure of the jaw, mandibular teeth line. A secondary aim was to briefly review the evolution and growth theories. Based on the information that were reviewed, it was found that modern societies possess higher prevalence of temporomandibular joint dysfunction. Materials & methodsThe proposed mechanical theory is an added value to explain the impact of modernization on the prevalence of impacted third molar. During this transition societal factors and peoples’ quality of life changes people’s eating behavior and the associated activities of the mastication apparatus, jaw activities. The aim of this review was to introduce a new theory being the mechanical theory which hypothesizes that modernization is related to a reduction in the functional activities of the jaw which in turn negatively impacted the structure of the jaw, mandibular teeth line. A secondary aim was to briefly review the evolution and growth theories. ConclusionBased on the information that were reviewed, it was found that modern societies possess higher prevalence of temporomandibular joint dysfunction. The proposed mechanical theory is an added value to explain the impact of modernization on the prevalence of impacted third molar.

Prevalence of impacted third molars in the South African Indian population of the eThekwini Metropolitan Region

Prevalence of impacted third molars in the South African Indian population of the eThekwini Metropolitan Region

Prevalence of impacted third molars among orthodontic patients in different malocclusions.

The aim of this retrospective study was to investigate the prevalence and pattern of third molar impaction and missing third molars in patients over 18 years in different anteroposterior skeletal patterns among central Indian populations. The study reviewed 357 orthopantomograms of patients attending the Government College of Dentistry, Indore, Madhya Pradesh. Patients were evaluated to determine the prevalence of third molar impaction, angulation, and level of eruption in Class I, Class II, and Class III patients using Winter's classification to determine angulation of third molars and Pell and Gregory classification for level of impaction. Out of 357 patients, 187 (52.3%) were present with at least one impacted teeth. The third molar impaction was most commonly present in Class II malocclusion (60.65%). Overall, the most common angulation of impaction in both genders was the mesioangular (39%), and the most common level of impaction in both arches was Level B. In Class I, Class II and Class III malocclusion vertical angulation was the most common finding in the maxillary arch and mesioangular angulation in the mandibular arch. No significant association was observed between different types of malocclusion and third molar impaction (P > 0.4648). This study found that almost half of the adult patients above 18 years had at least one impacted third molar. The anteroposterior relationship does not have any significant role for the third molar impaction.

Gender Variation in Pattern of Mandibular Third Molar Impaction

A tooth is said to be impacted when it is obstructed on its path of eruption with the most commonly impacted tooth being the third molar. Various factors have been reported to cause obstruction in the path of eruption of the third molar and these include adjacent tooth, bone as well as soft tissue. Lack of space in the dental arch for the third molar to emerge as well as pathological lesions, stunted growth of tooth germ following nutritional deficiency, irradiation and physical trauma have been implicated in the etiology of third molar impaction [1]. There are varying reports regarding the prevalence of impacted third molars. Impacted third molars are more likely to occur in the mandible than in the maxilla [2,3].However, studies have consistently shown that mesioangular impaction is the most common angulations of impaction of mandibular third molars [1,2,4-6]. A few studies [4,6-8] tried to determine if there are any gender variations in mandibular third molar impaction with varying reports about the association of gender with third molar impaction. Previous studies [2,4] reported no statistically significant difference between gender and mandibular third molar impaction while another study [9] reported significant association between gender and number of impacted teeth as well as the presence of impacted mandibular teeth. With the varying reports regarding the association of gender to third molar impaction, this study was designed to determine the gender variation in mandibular third molar impaction among a group of Nigerian dental patients.

Use of Panoramic Radiography to Detect Prevalence of Impacted Third Molar AmongChineseStudents In Faculty of Dentistry, University of Sumatera Utara

Impacted tooth is defined as normal eruption path of tooth that being blocked, normally by adjacent tooth or pathology tissue until its did not grow ideally on dental arch. Third molar is the latest eruption tooth in oral cavity, between 18-25 years old, This condition may causes third molar more frequently impacted compare to other tooth due to lack of space for eruption. This study aims to know the prevalence of impacted third molar on Chinese students seen from panoramic radiography in Faculty of Dentistry, University of Sumatera Utara (USU). This research was descriptive with sample of 50 Chinese students consisting of 14 males and 36 females that experiences impaction of third molar. Sample taking method used was purposive sampling. The research was conducted in Radiology Department, Faculty of Dentistry USU. The results of research showed the prevalence differences on maxilla and mandibular between men and women. In conclusion, the horizontal angulation in the mandible and vertical angulation in the maxilla were the most common angular position. Type A in the mandible and type B in the maxilla were the most common types of impaction's depth. Relationship between the position of the tooth to distal of second molar on mandible more cases on class II. This research showed prevalence impacted third molar on women were 75,78% and men were 24,22%. Ratio between women to men was 3,1:1. Keyword:Impacted third molar, Panoramic radiography, Chinese students

Pattern of mandibular third molar impaction: A cross-sectional study in northeast of Iran.

Impacted teeth, if left untreated, have a potential to induce various complications. The aim of the current study was to determine the prevalence and pattern of impacted mandibular third molar in the Iranian population. This cross-sectional study was performed in patients who were referred to the Department of Oral Radiology between July 2009 and October 2010 to obtain an orthopantomogram (OPG). Data were collected regarding age and gender, prevalence of impacted mandibular third molars, angulation of impacted teeth (Winter's classification), level of impaction (Pell and Gregory classification), and relationship of the mandibular third molar with the ramus (Pell and Gregory classification). The collected data were analyzed using SPSS software version 11.0 with a confidence interval of 95%. Among the 1433 patients included in the study, 489 (34.12%) patients were male and 944 (65.88%) were female. Of the total OPGs performed, 871 (60.78%) OPGs demonstrated at least one impacted mandibular third molar. In addition, of the 2866 mandibular third molars investigated, 1397 (48.74%) were found to be impacted. A significant association was observed between gender and the number of impacted teeth or the presence of impaction of any mandibular tooth (or teeth) (P < 0.05). The most common type of tooth angulation was mesioangular (48.67%). In addition, the most prevalent type of impaction level and ramus relationship was level B (63.85%) and Class II (48.46%), respectively. There were no significant differences between the two sides of the mandible for the prevalence of impacted third molar (P > 0.05). The pattern of mandibular third molars in the Northeast region of Iran revealed a high prevalence of impaction, which was mostly mesioangular, level B, and Class II with a gender predilection for females.

Investigation of third molar impaction in Turkish orthodontic patients: Prevalence, depth and angular positions.

Objective:We aimed to investigate the prevalence, distribution, angular position, and depth of third molar impaction in a Turkish orthodontic patient population.Materials and Methods:We retrospectively reviewed the panoramic radiographs, intraoral photographs, and dental casts of 207 patients (62 men and 145 women; age 20-39 years) who had undergone orthodontic treatment at a university department of orthodontics for impacted third molars (ITMs). A comprehensive chart review of all subjects was conducted. Patient and treatment-related data were recorded in a digital database for comparative analysis.Results:The prevalence of ITMs was 54.1%, and no statistically significant gender differences were evident (61.3% in men and 51.0% in women; P = 0.23). The frequency of maxillary ITMs was 49.3% (148 of 300 teeth) while that of mandibular ITMs was 50.7% (152 of 300 teeth). The most frequently observed angulations of impaction were mesioangular for the mandible (65.1%), and distoangular for the maxilla (64.2%). Of all the ITMs analysed, 61% were partially buried in bone and 39% were completely buried.Conclusions:Third molar impaction was evident in 54.1% of a group of Turkish orthodontic patients aged 20-39 years, and there was no statistically significant gender bias. Mesioangular and distoangular inclinations were the most common in the mandible and the maxilla, respectively.

Surgery of wisdom teeth at Muhimbili National Hospital Dar es Salaam Tanzania

This was a retrospective study based on hospital data retrieved from files of patients who were treated at Muhimbili National Hospital (MNH ) for a period of 5 years (2007- 2003). The main objective of the study was to document on surgical removal of impacted wisdom teeth at MNH, Department of Oral Surgery/Pathology. All patients who had been treated and recorded in the files at the department were included in the study. Information regarding age, sex, wisdom tooth removed and location within the jaws were entered on a special data documentation form. The datawere entered into computer software and analyzed by using SPSS computer program. Out of the total 19671 patients who had undergone teeth extractions, about 644(3%) patients underwent surgical removal of impacted wisdom teeth. Of the 644 patients who underwent surgical removal of wisdom teeth, 303 (47.1%) were males and 341 (52.9%) were females. Their sex ratio (M: F) was1:1.13 and their age ranged from 17 to 60 years. The age groups 20-29 [48.1%] and 30-39 [25%] comprised majority of the patients who underwent disimpaction followed by age groups 11-19 [9.4%], 40-49 [11.8%] and 50-59 [5.2%]. Age group 60-69 [0.5%] had fewer patients. A high number of patient 613 [94.2%] with impacted wisdom teeth had their impactions located in the lower jaw whileonly a few number 31[4.8%] located in the upper jaw. The study concluded that majority of patients had their wisdom teeth removed during the age groups 20 &ndash; 29 years and 30 &ndash; 39 years and the mandible was more commonly affected than the maxilla. Also the study revealed that the prevalence of impacted third molar was low (3.3%) in this local population compared to what has been reported in other studies. The difference couldprobably be due to regional variation of the population and ethnic groups. However there is a need to conduct a prospective study in order to show the real picture of surgery of impacted wisdom teeth within this population.Key words: Wisdom tooth surgery, age, sex, location

Estudo dos Terceiros Molares numa População de Consulta Clínica em Gandra

ObjectivesTo establish the prevalence of impacted third molars in an asymptomatic population and characterize the impaction and its sub-types in this population. Material and methodsBy the analysis of orthopantomograms, and using a descriptive protocol, in witch the confidentiality of data was respected, a clinical-radiological study of individuals that have been assisted in the dental clinic of C.E.S.P.U. in Gandra, for the first time, during the year 2005 was undertaken, and data was obtained regarding the presence or absence of the third molars on the arcades. The tooth was defined as being ectopic, impacted, semi-impacted, extracted or absent. In the cases where the third molar was observed on the arcade or where an impaction or semi-impaction was detected its relative position was recorded: horizontal, vertical, mesioangular, or distoangular. ResultsWe can evidence that the ages with bigger percentages of existing individuals in the sample are: of the 16 to the 25 years. The positioning of the impacted third molars most frequent is the ones that present a normal situation of eruption with a vertical positioning. Most of the individuals does not present any complication of the inclusion. ConclusionsThe third molar ones although to be gifts in the great majority of the population, only in a small percentage if present in its all. The dental caries of the adjacent tooth is associated with the inclination and the position of the third molar ones. The relation between the third molar and inferior alveolar nerve are, in some cases, very next.