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Management of open bite that developed during treatment for internal derangement and osteoarthritis of the temporomandibular joint.

Arai C, Choi JW, Nakaoka K, Hamada Y, Nakamura Y - Korean J Orthod (2015)

Bottom Line: Then, the mandibular second premolars were extracted and comprehensive orthodontic treatment was performed to establish a Class I molar relationship with distalization of the maxillary arch and to eliminate anterior crowding.Following treatment, her facial profile improved and a functional and stable occlusion was achieved without recurrence of the TMJ symptoms.These results suggest that orthodontic intrusion of the molars is one of the safer and less stressful alternatives for the management of open bite due to degeneration of the condyles caused by ID and OA of TMJ.

View Article: PubMed Central - PubMed

Affiliation: Department of Orthodontics, School of Dental Medicine, Tsurumi University, Yokohama, Japan.

ABSTRACT
This case report describes the orthodontic treatment performed for open bite caused by internal derangement (ID) and osteoarthritis (OA) of the temporomandibular joint (TMJ). A Japanese woman, aged 31 years and 11 months, referred to our department by an oral surgeon had an open bite with clockwise rotation of the mandible and degeneration of the condyle. The overbite was corrected through intrusion of the maxillary and mandibular molars using mini-screw implants to induce counterclockwise rotation of the mandible. Then, the mandibular second premolars were extracted and comprehensive orthodontic treatment was performed to establish a Class I molar relationship with distalization of the maxillary arch and to eliminate anterior crowding. Following treatment, her facial profile improved and a functional and stable occlusion was achieved without recurrence of the TMJ symptoms. These results suggest that orthodontic intrusion of the molars is one of the safer and less stressful alternatives for the management of open bite due to degeneration of the condyles caused by ID and OA of TMJ.

No MeSH data available.


Related in: MedlinePlus

Pretreatment radiographic examination. A, Pretreatment panoramic radiograph. B, Pretreatment lateral cephalogram.
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Figure 5: Pretreatment radiographic examination. A, Pretreatment panoramic radiograph. B, Pretreatment lateral cephalogram.

Mentions: A panoramic radiograph indicated the presence of all four third molars, root resorption in the maxillary incisors, and considerable resorption of the bilateral mandibular condyles (Figures 1B and 5A). Lateral cephalometric analysis showed the following values: ANB angle, 4.5°; FMA, 46.7°; U1-SN, 95.8°; L1-MP, 83.7° (Table 1, Figure 5B). On the basis of the above findings, the patient was diagnosed with open bite caused by morphological changes in the bilateral condyles. For the definitions for cephalometric measurements in the main text, refer to the legends of Table 1.


Management of open bite that developed during treatment for internal derangement and osteoarthritis of the temporomandibular joint.

Arai C, Choi JW, Nakaoka K, Hamada Y, Nakamura Y - Korean J Orthod (2015)

Pretreatment radiographic examination. A, Pretreatment panoramic radiograph. B, Pretreatment lateral cephalogram.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4446375&req=5

Figure 5: Pretreatment radiographic examination. A, Pretreatment panoramic radiograph. B, Pretreatment lateral cephalogram.
Mentions: A panoramic radiograph indicated the presence of all four third molars, root resorption in the maxillary incisors, and considerable resorption of the bilateral mandibular condyles (Figures 1B and 5A). Lateral cephalometric analysis showed the following values: ANB angle, 4.5°; FMA, 46.7°; U1-SN, 95.8°; L1-MP, 83.7° (Table 1, Figure 5B). On the basis of the above findings, the patient was diagnosed with open bite caused by morphological changes in the bilateral condyles. For the definitions for cephalometric measurements in the main text, refer to the legends of Table 1.

Bottom Line: Then, the mandibular second premolars were extracted and comprehensive orthodontic treatment was performed to establish a Class I molar relationship with distalization of the maxillary arch and to eliminate anterior crowding.Following treatment, her facial profile improved and a functional and stable occlusion was achieved without recurrence of the TMJ symptoms.These results suggest that orthodontic intrusion of the molars is one of the safer and less stressful alternatives for the management of open bite due to degeneration of the condyles caused by ID and OA of TMJ.

View Article: PubMed Central - PubMed

Affiliation: Department of Orthodontics, School of Dental Medicine, Tsurumi University, Yokohama, Japan.

ABSTRACT
This case report describes the orthodontic treatment performed for open bite caused by internal derangement (ID) and osteoarthritis (OA) of the temporomandibular joint (TMJ). A Japanese woman, aged 31 years and 11 months, referred to our department by an oral surgeon had an open bite with clockwise rotation of the mandible and degeneration of the condyle. The overbite was corrected through intrusion of the maxillary and mandibular molars using mini-screw implants to induce counterclockwise rotation of the mandible. Then, the mandibular second premolars were extracted and comprehensive orthodontic treatment was performed to establish a Class I molar relationship with distalization of the maxillary arch and to eliminate anterior crowding. Following treatment, her facial profile improved and a functional and stable occlusion was achieved without recurrence of the TMJ symptoms. These results suggest that orthodontic intrusion of the molars is one of the safer and less stressful alternatives for the management of open bite due to degeneration of the condyles caused by ID and OA of TMJ.

No MeSH data available.


Related in: MedlinePlus