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. 2023 Jan-Mar;14(1):46-50.
doi: 10.4103/japtr.japtr_489_22. Epub 2023 Jan 20.

Prevalence and pattern of third molars impaction: A retrospective radiographic study

Ramizu Bin Shaari  1 , Mohamad Arif Awang Nawi  1 , Ameera Kamal Khaleel  2 , Ali Sultan AlRifai  2
Affiliations

Prevalence and pattern of third molars impaction: A retrospective radiographic study

Ramizu Bin Shaari et al. J Adv Pharm Technol Res. 2023 Jan-Mar.

Abstract

Third molar impaction is considered a prevalent issue. The research aimed to study the pervasiveness and pattern of impaction in Karbala/Iraqi population. Orthopantomograms were studied regarding its angulation, impaction depth, and correlation with ramus. The outcomes manifested that the prevalence of 3rd impacted molars was 34.71%, with the proportion of male to female as 0.83:1. Impacted mandibular 3rd molars were significantly encountered. The prevalence of vertical angulation, mesioangular, horizontal, and inverted were significantly associated with the impacted mandibular 3rd molars (P < 0.05). However, the prevalence of distoangular and bucco/lingual was significantly associated (P < 0.05) with the upper impacted 3rd molars. Level C of impaction was significantly (P < 0.05) the most typical level in the maxilla impacted the 3rd molar, and level A and level B of impaction were significantly (P < 0.05) the most prevalent level correlated with the mandibular 3rd molar impaction. Class II was significantly (P < 0.05) the frequently occurring condition subsequent to Classes III and I. In conclusion, the impaction of 3rd molars was significantly predominant in females and lower jaw. The vertical angulation, level C of impaction associated with maxillary 3rd molars and levels A and B of impaction related with mandibular 3rd molars, and Class II are the most encountered conditions.

Keywords: Impaction; panoramic radiography; wisdom teeth.

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Conflict of interest statement

There are no conflicts of interest.

Figures

Figure 1
Figure 1
Winter's categorization depends on the relation of the impacted third molar tooth to the long axis of 2nd molar tooth. (a) Vertical. (b) Mesioangular. (c) Horizontal. (d) Distoangular. (e) Bucco/lingual. (f) The inverted
Figure 2
Figure 2
Pell and gregory categorization relates the occlusal plane level or the greatest portion of the impacted 3rd tooth is either (a1 and a2) at the level or above the occlusal plane of the 2nd molar (Position A), or (b1 and b2) between the cervical margin of the 2nd molar and occlusal plane (Position B), or (c1 and c2) below the cervical margin of the 2nd molar (Position C)
Figure 3
Figure 3
Pell and Gregory classification shows the relation of the position of the tooth to the ascending ramus and 2nd molar: (a) Class I: Margin in the middle of the distal surface of the 2nd molar and the ramus is more than the mesiodistal size of the crown of the 3rd molar. (b) Class II: The margin linking the distal surface of the 2nd molar and ramus is slighter than the mesiodistal size of the crown of the 3rd molar. (c) Class III: Most or all of the 3rd molar crown is located inside the ramus
Figure 4
Figure 4
OPGs shows impaction of one (a), two (b), three (c), and four (d) third molars
See this image and copyright information in PMC

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