Radiographic Evaluation of Five Variables in Iraqi Young Subjects among Impacted and Erupted Lower Wisdom Teeth Groups
Keywords:Panoramic; 3rd molar; impacted tooth, ramus, center.
Objective: To look at those contrasts in five variables in connection to sex between impacted and erupted
lower wisdom teeth groups on digital panoramic radiographs in Iraqi young subjects.
Those variables that compared were: retromolar space might have been measured by drawing a line starting
with Ricketts (Xi) by drawing accordance with the focal point of the ramus on the distal surface of the lower
2nd molar. Retromolar space starting from the anterior edge of claiming ramus (AER-7) might have been
measured dependent upon those distal surfaces of the more level the 2nd molar along the occlusal plane.
The angle of the tooth axis of the 2nd and 3rd molar (? angle). Mesiodistal width of the lower wisdom tooth
(MDW) was calculated, while space/width ratio (SWR) might have been gotten through (AER-7/MDW).
Materials and Method: This study comprised 80 patients their ages varying between 20 and 25 years all
of them having full dentition with bilaterally present mandibular 3rd molars. After they examine clinically,
lower 3rd molars were distributed into two; Group A erupted (20 male and 20 female), whereas Group B
included the impacted mandibular 3rd molars (20 male and 20 female). Five variables were measured in
all radiographs to make a comparison between the two groups. The data analysis was done by using SPSS
(ver.10) by applying T-test and descriptive tests.
Results: The means of (Xi-7, AER-7, MDW) are larger in males than females in both groups A and B. The
means of (Xi-7, AER-7,) are larger in group A than group B. the mean of the ? angle is larger in group B. the
mean of SWR in group B is less than1.
Conclusion: This study demonstrated that the long axes of the 2nd molar and wisdom teeth (? angle) and a
space parameter were important parameters in predicting mandibular 3rd molar eruption.
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