Clinical Survey of Surgical-orthodontics Cases Treated in the Past Decade at the Orthodontic Department, Niigata University Medical and Dental Hospital

Oguri, Yoshimitsu; Naganuma, Kazuo; Harada, Fumiko; Watanabe, Atsushi; Yamaki, Masaki; Saito, Chikara; Takagi, Ritsuo; Saito, Isao

doi:10.5927/jjjd.20.297

Cited by 7 publications

(3 citation statements)

References 12 publications

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“…Changes in population structure and social needs in Japan have recently yielded an increment in patients with dentofacial deformities seeking surgical orthodontic treatment. Of Japanese orthognathic patients, skeletal Class III cases are most frequently found at orthodontic and/or oral surgery departments . Sasakura et al .…”

Section: Introductionmentioning

confidence: 99%

Tongue pressure production during swallowing in patients with mandibular prognathism

Sakaue

Fukui

Sasakura

et al. 2016

J of Oral Rehabilitation

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The tongue pressure waveform differed between the control and patient groups. The incidence of a double-peak tongue pressure waveform was more frequent in the patient group. In both groups, the exertion of tongue pressure began at the anterior point of the sensor sheet, followed by the peripheral parts. Although the order of expression of tongue pressure was the same for the two groups, maximum tongue pressure at all parts of the sensor sheet was lower in the patient group than in the control group. Furthermore, swallowing time was longer in the patient group than in the control group at the peripheral parts of the palate. These results clearly show the difference in tongue pressure production during swallowing between patients with mandibular prognathism and volunteers with normal occlusion. The current findings suggest that maxillofacial morphology may affect tongue movement during swallowing.

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Section: Introductionmentioning

confidence: 99%

Tongue pressure production during swallowing in patients with mandibular prognathism

Sakaue

Fukui

Sasakura

et al. 2016

J of Oral Rehabilitation

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“…Group 1 included 39 patients, which was approximately 40% of the total, while the remaining 60% of cases exhibited some kind of asymmetry or deviation. Severt et al reported that 34% of patients with jaw deformity exhibit clinically obvious facial asymmetry [ 20 ], while Oguri et al performed an analysis in which they defined lateral deviation as ≥ 4 mm of deviation in the maxillary and mandibular midline and reported that lateral deviation was observed in 48.6% of patients in whom surgical orthodontic treatment was indicated [ 1 ]. Compared with these studies, our study had a higher percentage of patients with asymmetry, although we believe that enabled detection of cases in which jaw deviation was previously difficult to diagnose, and particularly cases with deviation of the condylar head.…”

Section: Discussionmentioning

confidence: 99%

“…The number of patients who have chief compliant of an improvement in skeletal disharmony is increasing recently [ 1 ]. A nationwide survey in Japan revealed that 67.6% of orthognathic patients was mandibular prognathism [ 2 ].…”

Section: Introductionmentioning

confidence: 99%

A three-dimensional investigation of mandibular deviation in patients with mandibular prognathism

Osawa

Nihara

Nishiyama

et al. 2023

Maxillofac Plast Reconstr Surg

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Background Craniofacial disharmony in cases of jaw deformity associated with abnormal lateral deviation of the jaw mostly involves both the maxilla and mandible. However, it has been still difficult to capture the jaw deviation aspect in a 3-dimensional and quantitative techniques. In this study, we focused on 3-dimensional mandibular morphology and position of the condylar head in relation to the base of the skull in patients with mandibular prognathism, one of the most common jaw deformities. We used cluster analysis to quantify and classify deviation and clarified its characteristics. We also investigated the degree of correlation between those findings and menton (Me) deviation measured on frontal cephalograms, which is a conventional indicator of jaw deformity. Results Findings obtained from 100 patients (35 men, 65 women) were classified into the following three groups based on mandibular morphology and condylar position relative to the skull base. Then, reclassification using these parameters enabled classification of cluster analysis findings into seven groups based on abnormal jaw deviation characteristics. Comparison among these seven groups showed that the classification criteria were ramus height, mandibular body length, distance from the gonion to the apex of the coronoid process, and the lateral and vertical positions of the mandible. Weak correlation was also found between Me deviation on frontal cephalograms and each of the above parameters measured on 3D images. Conclusions Focusing on mandibular morphology and condylar position relative to the skull base in patients with mandibular prognathism, we used cluster analysis to quantify and classify jaw deviation. The present results showed that the 3D characteristics of the mandible based on mandibular morphology and condylar position relative to the skull base can be classified into seven groups. Further, we clarified that Me deviation on frontal cephalograms, which has been used to date, is inadequate for capturing jaw deviation characteristics.

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The Relationship between the Bilateral Difference of Mandibular Posterior Movement and the Amount of Middle Region Displacement in Mandibular Prognathism Patients Treated with Mandibular Setback Surgery

Takahashi¹,

Nihara²,

Morita³

et al. 2017

Jpn. J. Jaw Deform.

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Clinical Survey of Surgical-orthodontics Cases Treated in the Past Decade at the Orthodontic Department, Niigata University Medical and Dental Hospital

Cited by 7 publications

References 12 publications

Tongue pressure production during swallowing in patients with mandibular prognathism

Tongue pressure production during swallowing in patients with mandibular prognathism

A three-dimensional investigation of mandibular deviation in patients with mandibular prognathism

The Relationship between the Bilateral Difference of Mandibular Posterior Movement and the Amount of Middle Region Displacement in Mandibular Prognathism Patients Treated with Mandibular Setback Surgery

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