Management of multiple adjacent asymmetric intruded teeth by differential curve of Spee mechanics: a case report


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Australasian Orthodontic Journal

Australian Society of Orthodontists

Subject: Dentistry, Orthodontics & Medicine


ISSN: 2207-7472
eISSN: 2207-7480





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VOLUME 34 , ISSUE 1 (May 2018) > List of articles

Management of multiple adjacent asymmetric intruded teeth by differential curve of Spee mechanics: a case report

Heng-Ming Mark Chang / Chao-Wen Ting / Kai-Lung Wang / Kwok-Hing Ho / Shun-Chu Hsieh / Hsueh-Jen Lin *

Citation Information : Australasian Orthodontic Journal. Volume 34, Issue 1, Pages 78-84, DOI:

License : (CC BY 4.0)

Published Online: 20-July-2021



Introduction: Of the types of dental trauma, intrusive luxation is considered to have the worst prognosis. When forceful intrusion affects multiple adjacent teeth, orthodontic repositioning may be required; however, orthodontic treatment can be complicated by the development of a cant in the occlusal plane, especially when the affected teeth are not symmetrically located from the midline and corrective forces and anchorage are unbalanced. Designing an appropriate mechanism to overcome this problem is essential.

Case presentation: The present case report describes a 28-year-old male who suffered the traumatic intrusion of multiple teeth, with accompanying alveolar bone fractures, following a road traffic accident. The intruded teeth were repositioned using orthodontic traction, following which, endodontic treatment was performed. After initial alignment, differential curve of Spee mechanics were applied to correct the occlusal plane and an acceptable result was achieved. The overall outcome was maintained at a 24-months review.

Conclusion: This report demonstrates the importance of the early repositioning of intruded teeth to avoid dento-alveolar ankylosis, as well as the use of differential curve of Spee mechanics which provides effective force application in the management of a canted occlusal plane.

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