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KMID : 0362720210590020095
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Journal of the Korean Dental Association
2021 Volume.59 No. 2 p.95 ~ p.100
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Surgical Removal of Orthodontic Mini-screw Accidentally Displaced Into the Pterygomandibular Space Via Intraoral Approach
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Lee Ga-Hyung
Yoo Jeong-Hun
Kim Hwi-Kang
Kim Bong-Chul
Lim Hun-Jun
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Abstract
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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, submandibular 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.
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KEYWORD
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mini-screw, displaced, pterygomandibular space
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