Endodontic Surgery of a Deviated Premolar Root in the Surgical Orthodontic Management of an Impacted Maxillary Canine

Root dilaceration in maxillary impacted canines and adjacent teeth: A retrospective analysis of the difference between buccal and palatal impaction

INTRODUCTION

This research aimed to analyze the prevalence of root dilaceration in buccally impacted canines (BICs) and palatally impacted canines (PICs) with their adjacent teeth based on a retrospective cone-beam computed tomography (CBCT) investigation.

METHODS

Pretreatment CBCT images of 145 subjects with unilateral maxillary canine impaction and 145 age- and sex-matched subjects without impaction were used. Prevalence of dilaceration (subclassified to root curvature and apical hook based on severity) in canines and adjacent teeth was determined in CBCT records. The root length of maxillary impacted canines was measured for further morphologic evaluations.

RESULTS

Impacted canines had a significantly higher prevalence of root dilaceration than the control group and compared with the erupted contralateral canines in the experimental group (P < 0.001 for both). A significantly higher prevalence of root dilaceration was found in adjacent lateral incisors of the PICs subgroup than that of the control group (P < 0.001). Adjacent premolars had a higher prevalence of dilacerated roots in the PICs subgroup (P < 0.001) than the control group, but not for the BICs subgroup. Significantly higher prevalence of curvature (P < 0.001 for both) and hook (P = 0.008 and P < 0.001, respectively) were found in BICs and PICs roots compared with the control group. Both types of impacted canines had significantly shorter roots than the control group (P < 0.001 for both).

CONCLUSIONS

BICs and PICs have a higher tendency to present root dilaceration and shorter roots. Unlike BICs, adjacent teeth to PICs were more frequently observed to have root dilaceration.

Case report: Dentigerous Cyst and Canine Impaction at the Orbital Floor

Dentigerous cysts are cysts of the epithelial lining of the jaws derived from the dental follicle of unerupted teeth. These cysts are often found during routine radiographic examination along with unerupted teeth. Dentigerous cysts are usually asymptomatic unless the size becomes large, thus causing swelling. This case report describes the management of dentigerous cyst in the upper left canine region with canine impaction to the orbital floor. Dentigerous cyst was treated with cyst enucleation but the impacted canine was not taken because of the magnitude of risk that can occur which was a disruption to the eye muscle. Conclusion. Treatment of dentigerous cysts can be performed by enucleation technique and management related the impacted tooth at the orbital floor needs a further evaluation consideration.