Risk factors for root resorption of second molars associated with impacted mandibular third molars.

Suter, Valérie; Rivola, M; Schriber, Martina; Leung, Y Y; Bornstein, M M (2019). Risk factors for root resorption of second molars associated with impacted mandibular third molars. International journal of oral & maxillofacial surgery, 48(6), pp. 801-809. Elsevier 10.1016/j.ijom.2018.11.005

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External root resorption (ERR) affecting mandibular second molars (M2) may occur when the adjacent third molar (M3) is impacted in close proximity. This retrospective cohort study aimed to assess the presence, severity, and location of ERR on M2 due to M3 using cone beam computed tomography (CBCT) scans and to identify associated factors. The angle between the axis of M2 and M3 was measured. ERR on M2 was classified as absent, slight, moderate, or severe. The location of contact between M3 and M2, the size of the dental follicle, and patient demographic characteristics were recorded. A total of 433 patients with 640 M3 were included. A male predilection was found with regard to ERR (P=0.0004). ERR was identified on 31.9% of M2 and was slight in 30.2%, moderate in 1.4%, and severe in 0.3% of cases. The presence of ERR was associated with direct contact between M2 and M3 (P<0.0001), the angle between M2 and M3 (P<0.0001), the inclination of M3 (P=0.001), and the location of contact (P=0.0005). This study showed ERR to be a frequent finding. ERR is associated with a mesioangular position of M3 in more than one third of cases, and a proximity ≤0.5mm between M2 and M3 favours ERR.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > School of Dental Medicine > Department of Oral Surgery and Stomatology

UniBE Contributor:

Suter, Valérie and Schriber, Martina

Subjects:

600 Technology > 610 Medicine & health

ISSN:

0901-5027

Publisher:

Elsevier

Language:

English

Submitter:

Caroline Balz

Date Deposited:

28 Aug 2019 08:51

Last Modified:

22 Oct 2019 20:37

Publisher DOI:

10.1016/j.ijom.2018.11.005

PubMed ID:

30578156

Uncontrolled Keywords:

cone beam computed tomography root resorption second molar third molar wisdom tooth

BORIS DOI:

10.7892/boris.132541

URI:

https://boris.unibe.ch/id/eprint/132541

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