@article{oai:asahi-u.repo.nii.ac.jp:00013871,
 author = {渡邉, 一弘 and WATANABE, KAZUHIRO and 都尾, 元宣 and MIYAO, MOTONOBU and 江原, 雄一 and EHARA, YUICHI and NAGANAWA, KOSUKE and 髙橋, 萌 and TAKAHASHI, MOE and UKAI, AKIRA and MATSUSITA, TAKAHIRO and 安村, 真一 and YASUMURA, SHINICHI and HARADA, NAOMU and 住友, 伸一郎 and SUMITOMO, SHINICHIRO and 村松, 泰徳 and MURAMATSU, YASUNORI},
 issue = {2022-02},
 journal = {2022-02},
 month = {2022-02, 2022-05-06},
 note = {To fabricate a custom-made mouthguard (CMG) for a patient with a jaw deformity, we examined his mandibular position by using a Gothic arch tracer. A 19 year old man presented with malocclusion and temporomandibular joint dysfunction. He was a competitive volleyball player and needed a custom-made mouthguard (CMG) to prevent injury during his activity. At the first visit, the extraoral examination revealed that the mentum deviated to the left. The intraoral examination revealed Angle class III malocclusion, left posterior crossbite, left deviation of the lower middle line in the intercuspal position, and anterior deep overbite (overjet: -3.1 mm, overbite: 1.4 mm). He also had pains in the left temporomandibular joint and masseter muscle, but no abnormal bone morphology was found in the temporomandibular joint. Therefore, the patient was diagnosed with skeletal mandibular protrusion and type II temporomandibular disorders. To treat this malocclusion, orthodontic surgery was required; however, the patient did not want to have any aggressive treatment as long as he was an active athlete. Therefore, we decided to fabricate a CMG for preventing injury and stabilizing the jaw position. We used a Gothic Arch tracer to record the mandibular movement and positions and found that the tracing showed asymmetric movement to the right, indicating that the movement of the left mandibular condyle was inhibited. Assuming that Gothic arch apex position is pressureless mandibular retraction position (reference position), we fabricated a CMG in the reference position to stabilize the mandibular while the CMG was being worn. We took bite registrations in the Gothic Arch apex and centric occlusal positions to fabricate CMGs in both positions. We then examined the occlusal contacts, grip strength, and fit state when each CMG was worn. The results showed that the occlusal contact points were distributed more evenly when CMG in the Gothic Arch apex position was used than that in the centric occlusal position was used. The grip strengths of both hands were greater in the Gothic Arch apex position than in the centric occlusal position. The right and total grip strengths were significantly greater than the other measurement values (p < 0.05). The patient had a slight discomfort wearing the CMGs because these were his first CMGs, although he felt that the CMG in the Gothic arch apex position was more stable in his mouth than that in the centric occlusal position., 10.15090/00013767},
 pages = {2022-02--2022-02},
 title = {Custom-made Mouthguard Fabrication by Using Gothic Arch Tracing for a Jaw Deformity},
 volume = {2022-02},
 year = {}
}