MAXILLARY CANINE FOLLICULAR SPACE AND LATERAL INCISOR ROOT RESORPTION: A CBCT STUDY

Publication date: January 2019

Source: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology, Volume 127, Issue 1

Author(s): J.V. KRACKE, S. GHOLAM, L. PERES, N. SHAHABUDDIN, S.R. SINGER, M. MUPPARAPU

Background

It has been shown that the dental follicle is necessary for signaling osteoclasts to induce resorption of bone in the direction of the eruption.¹ A dental follicle can also induce resorption of nearby anatomic structures, including adjacent teeth, if there is insufficient space for the tooth to emerge.

Objective

The objective of this study was to identify patterns of resorption in maxillary lateral incisor roots and investigate a relationship to the width of the follicular space of the adjacent erupting canines.

Methods

Three hundred and thirty cone beam computed tomography (CBCT) volumes were obtained from an orthodontic practice, and identifying data were removed according to institutional review board guidelines. Each volume was analyzed for the presence of unerupted canines and lateral incisor.

Results

From the sagittal, the range of follicle sizes was 0.5 to 4.9 mm. From the axial, the range of follicle sizes was 0.5 to 4.9 mm. From the coronal, the range of follicle sizes was 0.5 to 5.4 mm. At a cutoff point of 2.03 mm, there was 76%, and sensitivity was 72%.

Discussion

The study included 252 canine teeth with enlarged follicular spaces. Fifty-two lateral incisors showed radiographic evidence of resorption, almost always on the distal–palatal aspect of the root. The statistical model predicted that if the follicle has an average size of 2.03 mm or greater, the patient has a higher predisposition of having lateral incisor root resorption on the same side.

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