Alignment of palatally impacted canine with open window technique and modified K-9 spring

Dipti Shastri, Amit Nagar, Pradeep Tandon, Dipti Shastri, Amit Nagar, Pradeep Tandon

Abstract

The patient was an 18-year-old female who had an Angle Class I malocclusion with a left palatally impacted maxillary canine. The orthodontic treatment of a palatally impacted canine is aimed at bringing the tooth into its correct position in the dental arch without causing any periodontal damage. To achieve this goal, a variety of surgical and orthodontic techniques have been proposed in relation to the position of the impacted tooth and there are various treatment methods used for traction. The duration of the traction was 3 months and alignment duration was 12 months the total treatment time was 15 months. In the following case, we presented that maxillary palatally impacted canine was brought into the arch with open window method for canine exposure and modified K-9 spring for traction, that is simple spring for orthodontic traction of the palatally impacted canines.

Keywords: Impacted maxillary canine; modified K-9 spring; open window method.

Conflict of interest statement

Conflict of Interest: None declared.

Figures

Figure 1
Figure 1
(a and b) Pretreatment photograph, (c) pretreatment orthopantomograph
Figure 2
Figure 2
(a) Surgical exposure with open window technique, (b) lingual button bonded over exposed impacted left canine, (c) biomechanics of K-9 spring dotted horizontal arm indicates activation of K-9 spring, arrow indicates distal direction of force, (K-9 spring exerts eruptive force (70 g) and distal force on impacted canine). (d) K-9 spring in inactivated form, (e and f) K-9 spring in activated form, (g) canine erupts in oral cavity 3 months, (h) 014 Cu-nickel-titanium ligated for alignment of palatally impacted canine, (i) alignment in progress
Figure 3
Figure 3
(a and b) Posttreatment intraoral photograph, (c) posttreatment orthopantomograph (OPG) (Treatment duration = 15 months), (d) superimposition of palatally impacted canine on OPG (path travelled by canine = 19 mm)

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