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CASE REPORT
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J Korean Dent Assoc. 2021;59(2):95-100. Published online January 31, 2021.
DOI: https://doi.org/10.22974/jkda.2021.59.2.002
- Surgical Removal of Orthodontic Mini-screw Accidentally Displaced Into the Pterygomandibular Space Via Intraoral Approach
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Ga-Hyung Lee
, Jeong-Hun Yoo
, Hwi-Kang Kim
, Bong-Chul Kim
, Hun-Jun Lim
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Department of Oral and Maxillofacial surgery, Daejeon Dental Hospital, College of Dentistry, Wonkwang University
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- Corresponding author: Hun-Jun Lim Tel: +82-42-366-1130(clinic), Fax: +82-42-366-1115, Email: hun216@gmail.com
- Received: August 10, 2020; Revised: August 14, 2020 Accepted: November 5, 2020.
- Abstract
- The mini-screw is widely used in orthodontic treatment for anchorage reinforcement. In mild skeletal Class III patient, retraction of mandibular dentition using mini-screw has been accepted as a reliable and stable treatment approach. In addition, the mini-screw placed in the retromolar area could be used for the uprighting of the lower molar. However, the placement of the mini-screw on the retromolar trigone or anterior ramus region need to be careful because of the possible risk of the “slippage” or “displacement”. Once the mini-screw is displaced to the fascial space such as pterygomandibular space, sub- mandibular space or lateral pharyngeal space, it is difficult to remove. In this case report, we present a mini-screw removal case via an intraoral approach that was displaced into the pterygomandibular space while placing the orthodontic mini-screw on the anterior margin of mandibular ramus.
Keywords :mini-screw; displaced; pterygomandibular space
