The incidence of mandibular third molar impactions in different skeletal face types

Breik, Omar; Grubor, D

doi:10.1111/j.1834-7819.2008.00073.x

Cited by 73 publications

(88 citation statements)

References 19 publications

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“…This is contrary to the findings of this study where a higher percentage of females presented with mesioangular impaction compared to males. Failure of mandibular third molar to erupt has been shown to be most affected by lack of space in the alveolar arch between the distal of the second molar and the ascending ramus [22]. This may account for why more females presented with mesioangular impaction as mandibular growth stops in females [16] leading to shortage of retromolar space which is a major aetiological factor of mandibular third molar impaction [23].…”

Section: Discussionmentioning

confidence: 99%

Gender Variation in Pattern of Mandibular Third Molar Impaction

Enabulele¹

2017

JDODT

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tion system was adapted to classify occupation into five (5) socioeconomic groups: Professionals and managerial officers and retirees of this type (e.g. doctors, lawyers), skilled workers (e.g. teachers, nurses), semi-skilled workers (e.g. artisans), unskilled workers (e.g. traders) and dependants (students and other unemployed individuals).Inclusion criteria were all consenting patients with at least one impacted mandibular third indicated for extraction. Informed consent was obtained from all the participants. Ethical approval was obtained from the Ethics and Research Committee of the College of Medical Sciences, University of Benin before commencement of the study.Periapical radiographs of the impacted mandibular third molars were exposed using the long cone paralleling technique and a digital probe to enable classification of the type of impaction and any other radiographic findings. The long cone paralleling technique was used for this study due to the fact that it is regarded as the technique of choice following its reduced radiation dose; less magnification and demonstration of the true relationship between the bone height and adjacent teeth [10].The impacted mandibular third molars were classified using the winter's classification based on the inclination of the long axis of the impacted third molar to the long axis of the second molar. The tooth was classified as mesio-angular when the impacted third molar is tilted towards the second molar in a mesial direction; disto-angular when the long axis of the impacted third molar is angled distally / posteriorly away from the second molar; horizontal when the long axis of the impacted third molar is horizontal and vertical when the long axis of the impacted third molar is parallel to the long axis of the second molar [11].The impacted mandibular third molars were also classified as partial impaction when the superficial portion of the tooth was covered only by soft tissue but the height of the tooth's contour was below the level of the surrounding alveolar bone and complete impaction when the tooth was completely encased in bone so that when the gingival is cut and reflected back, the tooth is not seen [12]. MethodologyThis was a prospective cross sectional study involving patients presenting with impacted mandibular third molars to the Dental Centre of the University of Benin Teaching Hospital.The data collection instrument was a pre-tested interviewer administered questionnaire. The questionnaire elicited information on demographic characteristics, number and type of impacted mandibular third molar, caries and cervical resorption status of the adjacent second molar and symptoms associated with the impacted mandibular third molar. The standard International Lab our occupational classifica- AbstractA 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 to...

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Section: Discussionmentioning

confidence: 99%

Gender Variation in Pattern of Mandibular Third Molar Impaction

Enabulele¹

2017

JDODT

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“…This phenomenon can affect any tooth but the impaction rate is much more frequent in mandibular third molar and the prevalence is influenced by age, gender, ethnicity and the skeletal face type. 3 There have been an increasing numbers of published studies reporting dental decay development in the tooth immediately next to the impacted wisdom tooth. [4][5][6][7][8] The caries process usually affects the distal aspect of the second molar ( Figure 1) and this has been strongly associated with impacted mandibular third molars especially mesioangular impactions.…”

Section: Introductionmentioning

confidence: 99%

Distal caries of the second molar in the presence of a mandibular third molar – a prevention protocol

Toedtling¹,

Coulthard

Thackray

2016

Br Dent J

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“…Sua frequência é maior na mandíbula do que na maxila, 3 e menor quanto mais próximo da ausência de um elemento dentário em um hemi-arco onde estiver o terceiro molar, devido à movimentação dentária para o fechamento do espaço [2][3][4][5][6] . A frequência de impactações de terceiros molares é maior do que em qualquer outro elemento, estando mais associada com a falta de espaço entre a distal do segundo molar e a borda anterior do ramo ascendente 3,[7][8][9] , presente em 90% dos casos 8 . Portanto, para que ocorra a erupção, é necessário que o diâmetro mesiodistal deste elemento seja inferior ao comprimento retromolar 10 .…”

Section: R Bras CI Saúde 21(3):239-244 2017unclassified

“…Tal crescimento pode ser vertical ou sagital, estando o primeiro mais associado com a impactação de terceiros molares 8 . Alguns estudos citam o crescimento mandibular 2,4 e a redução do espaço entre a distal do segundo molar e o ramo da mandíbula 3,[7][8][9][16][17][18] como fatores primordiais para a retenção de terceiros molares inferiores, fatores esses que podem ser influenciados pelo tipo de padrão de crescimento facial. Sendo assim, a possível correlação entre esses padrões e a presença de terceiros molares inclusos, embora seja um tema bastante pertinente, ainda é objeto de poucas pesquisas 7 .…”

Section: R Bras CI Saúde 21(3):239-244 2017unclassified

“…Alguns estudos citam o crescimento mandibular 2,4 e a redução do espaço entre a distal do segundo molar e o ramo da mandíbula 3,[7][8][9][16][17][18] como fatores primordiais para a retenção de terceiros molares inferiores, fatores esses que podem ser influenciados pelo tipo de padrão de crescimento facial. Sendo assim, a possível correlação entre esses padrões e a presença de terceiros molares inclusos, embora seja um tema bastante pertinente, ainda é objeto de poucas pesquisas 7 . Tendo em vista essa possível correlação e, portanto, a possibilidade de prever, ainda em idade jovem, qual paciente poderá ter os terceiros molares erupcionados em função e qual poderá tê-los impactados, o presente estudo avaliou a prevalência dos padrões de crescimento facial e sua correlação com a presença de terceiros molares inclusos em pacientes de um centro radiológico da cidade de João Pessoa.…”

Section: R Bras CI Saúde 21(3):239-244 2017unclassified

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