Mandibular wisdom tooth impaction and angulation in relation to the mandibular ramus among yemeni students: prevalence and pattern




Mandibular third molars; Impaction; Ramus; Angulation; Health teaching.


Background: The goal of this cross-sectional study was to determine the mandibular third molar impaction in an adult Yemeni student using the Pell & Gregory and Winter classification. Methods: An orthopantomographic x-ray was used to assess 200 students (mean age 22.34 years), 102 males and 98 females. The data was subjected to statistical tests, which included age, gender, angulation, width, and impaction depth. Results: Of 345 mandibular third molars examined, mandibular third molars were congenitally missing in about 14% of the cases, approximately 7.5% in females and 6.5 % in males. According to Pell and Gregory's classification, this study found a significant bilateral relation, with type A being the most prevalent in roughly half of the participants (61.4%). Type C, on the other hand, came in second with 22.9%, and this relationship was significant on both sides, particularly in women, who had greater mandibular third molar impaction than men. The vertical angulations of mandibular third molars showed the greatest vertical angulation (82.02%), followed by mesioangular (16.5%). Conclusion: The impaction pattern of mandibular third molars in Yemeni culture revealed a significant incidence of mesioangular, level B, and class II impaction, with more females than males.


Almendros-Marqués N., Alaejos-Algarra E., Quinteros-Borgarello M., Berini-Aytés L., & Gay-Escoda C. (2008) Factors influencing the prophylactic removal of asymptomatic impacted lower third molars. Int. J. Oral Maxillofac. Surg 37, 29–35.

Alsadat-Hashemipour M., Tahmasbi-Arashlow M., & Fahimi-Hanzaei F. (2012) Incidence of impacted mandibular and maxillary third molars: A radiographic study in a Southeast Iran population. Med. Oral Patol. Oral Cir. Bucal 18(28).

Breik O. & Grubor D. (2009) The incidence of mandibular third molar impactions in different skeletal face types. Aust. Dent. J 53, 320–324.

Byahatti S., Nayak R., & Jayade B. (2011) Eruption Status of Third Molars in South Indian City. J. Indian Acad. Oral Med. Radiol 23, S328–S332.

Cosson J. (2020) Interpreting an orthopantomogram. Aust. J. Gen. Pract 49, 550–555.

Eshghpour M., Rezaei N. M, & Nejat A. (2013) Effect of menstrual cycle on frequency of alveolar osteitis in women undergoing surgical removal of mandibular third molar: a single-blind randomized clinical trial. J. Oral Maxillofac. Surg 71(9), 1484–1489.

Friedman J. W. (2007) The prophylactic extraction of third molars: a public health hazard. Am. J. Public Health 97(9), 1554–1559.

Gorgani N., Sullivan R. E., & Dubois L. (1990) A radiographic investigation of third-molar development. ASDC J. Dent. Child 57(2), 106–110.

Grahnén H. (1956) Hypodontia in the permanent dentition. Odontol Revy 7. Suppl 3, 1–100.

Hashemipour M. A., Tahmasbi-Arashlow M., & Fahimi-Hanzaei F. (2013) Incidence of impacted mandibular and maxillary third molars: A radiographic study in a southeast iran population. Med. Oral Patol. Oral Cir. Bucal 18(1).

Hattab F., Rawashdeh M., & Fahmy M. (1995) Impaction status of third molars in Jordanian students. Oral Surg. Oral Med. Oral Pathol. Oral Radiol. Endod 79, 24–29.

Jung Y.-H. & Cho B.-H. (2014) Radiographic evaluation of third molar development in 6- to 24-year-olds. Imaging Sci. Dent 44, 185–191.

Kaur B., Sheikh S., & Pallagatti S. (2012) Radiographic assessment of agenesis of third molars and para-radicular third molar radiolucencies in population of age group 18-25 years old - a radiographic survey. Archives of Oral Research 8(1), 13-18.

Khan A. , U. Khitab, & Khan M. T. (2010) Impacted mandibular third molars: pattern of presentation and postoperative complications. Pakistan Oral and Dental Journal 30(2).

Kim J.-C., Choi S.-S., Wang S.-J., & Kim S.-G. (2006) Minor complications after mandibular third molar surgery: type, incidence, and possible prevention. Oral Surg. Oral Med. Oral Pathol. Oral Radiol. Endod 102, e4-11.

Kruger E., Thomson W., & Konthasinghe P. (2001) Third molar outcomes from age 18 to 26: Findings from a population-based New Zealand longitudinal study. Oral Surg. Oral Med. Oral Pathol. Oral Radiol. Endod 92, 150–155.

Levesque G.-Y., Demirjian A., & Tanguay R.. (1981) Sexual Dimorphism in the Development, Emergence, and Agenesis of the Mandibular Third Molar. J. Dent. Res 60(10), 1735–1741.

Ma’aita J. & Alwrikat A. (2000) Is the mandibular third molar a risk factor for mandibular angle fracture?. Oral Surgery, Oral Med. Oral Pathol. Oral Radiol. Endodontology 89(2), 143–146.H.

Mohammed Al-Sharani H. et al. (2021) The influence of wisdom tooth impaction and occlusal support on mandibular angle and condyle fractures. Sci. Rep 11(1), 8335.

Monaco G., Montevecchi M., Bonetti G. A., Gatto M. R. A., & Checchi L. (2004) Reliability of panoramic radiography in evaluating the topographic relationship between the mandibular canal and impacted third molars. J. Am. Dent. Assoc 135(3), 312–318.

Montelius G. (1932) Impacted TeethA Comparative Study of Chinese and Caucasian Dentitions. J. Dent. Res. - J DENT RES 12, 931–938.

Mosquera-Valencia Y., Vélez-Zapata D., & Velasquez-Velasquez M. (2020) Frequency of impacted third molar positions in patients treated in the IPS CES-Sabaneta-Antioquia. CES Odontol 33, 22–29.

Pell G. J. & Gregory G. T. (1933) Impacted mandibular third molars: classification and modified technique for removal. The dental digest 39(9), 330–338.

Pinares Toledo J., Retamal Yermani R., Ortega Pinto A., & Villanueva Conejeros R. (2021) Development of the third molar in Chileans: A radiographic study on chronological age. Forensic Sci. Int. Reports. 3, 100177.

Punjabi S., Khoso N. A., Butt A., & Channar K. A. (2013) Third molar impaction: Evaluation of the symptoms and pattern of impaction of Mandibular third molar teeth. J. Liaquat Univ. Med. Heal. Sci 12, 26–29.

Quek S. L., Tay C. K., Tay K., Toh S. L., & Lim K. C. (2003) Pattern of third molar impaction in a Singapore Chinese population: A retrospective radiographic survey. Int. J. Oral Maxillofac. Surg 32, 548–552.

Raj Kumar V., Yadav P., Kahsu E., Girkar F., & Chakraborty R. (2017) Prevalence and pattern of mandibular third molar impaction in eritrean population: A retrospective study. J. Contemp. Dent. Pract 18(2), 100–106.

Rauf S., Ali W., Tariq Q., Chaudhry R., Kazmi S. S., & Imtiaz M. (2019) Patter of Mandibular Third Molar Impaction: a Radiographic Study. Pakistan Oral Dent. J 39(3), 238.

Şekerci. A & Şişman Y. (2013) Comparison between panoramic radiography and cone-beam computed tomography findings for assessment of the relationship between impacted mandibular third molars and the mandibular canal. Oral Radiol 30, 170–178.

Singh N., Chaudhari S., Chaudhari R., Nagare S., Kulkarni A., & Parkarwar P. (2017) A radiographic survey of agenesis of the third molar: A panoramic study. J. Forensic Dent. Sci. 9(3), 130–134.

Winter G. B. (1926) Principles of exodontia as applied to the impacted mandibular third molar : a complete treatise on the operative technic with clinical diagnoses and radiographic interpretations. St. Louis, Mo.: American medical Book Company.

Zaman M. U., Almutairi N. S., Abdulrahman Alnashwan M., Albogami S. M., Alkhammash N. M., & Alam M. K. (2021) Pattern of Mandibular Third Molar Impaction in Nonsyndromic 17760 Patients: A Retrospective Study among Saudi Population in Central Region, Saudi Arabia. Biomed Res. Int 26.




How to Cite

ABULOHOM, F. .; AL-SHARANI, H. M. .; ALHASANI , A. H. .; AL-MUAALEMI , Z. .; AL-HUTBANY , N. A. .; ALDOMAINI, M. S. .; AL-RADHI, M. A. .; HU, T. Mandibular wisdom tooth impaction and angulation in relation to the mandibular ramus among yemeni students: prevalence and pattern . Research, Society and Development, [S. l.], v. 11, n. 6, p. e24011629015, 2022. DOI: 10.33448/rsd-v11i6.29015. Disponível em: Acesso em: 25 jul. 2024.



Health Sciences