Short-term changes in muscle activity and jaw movement patterns after orthognathic surgery in skeletal Class III patients with facial asymmetry

Kim, Kyung‐A; Park, Hong-Sik; Lee, Sooyeon; Kim, Su-Jung; Baek, Seung‐Hak; Ahn, Hyo‐Won

doi:10.4041/kjod.2019.49.4.254

Cited by 4 publications

(3 citation statements)

References 27 publications

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“…In addition, the more the menton deviated from the center, the more vertical extrusion appeared on the nondeviated side. Kim et al 25 observed short-term changes in mandibular movement and chewing patterns in skeletal Class III adult patients with facial asymmetry. They found that the patients recovered their muscle activity Table 4.…”

Section: Discussionmentioning

confidence: 99%

Comparison of the bite force and occlusal contact area of the deviated and non-deviated sides after intraoral vertical ramus osteotomy in skeletal Class III patients with mandibular asymmetry: Two-year follow-up

Kwon¹,

Park²,

Jung³

et al. 2022

Korean J Orthod

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Objective:The objectives of this study were to compare the time-dependent changes in occlusal contact area (OCA) and bite force (BF) of the deviated and non-deviated sides in mandibular prognathic patients with mandibular asymmetry before and after orthognathic surgery and investigate the factors associated with the changes in OCA and BF on each side. Methods: The sample consisted of 67 patients (33 men and 34 women; age range 15-36 years) with facial asymmetry who underwent 2-jaw orthognathic surgery. OCA and BF were taken before presurgical orthodontic treatment, within 1 month before surgery, and 1 month, 3 months, 6 months, 1 year, and 2 years after surgery. OCA and BF were measured using the Dental Prescale System. Results: The OCA and BF decreased gradually before surgery and increased after surgery on both sides. The OCA and BF were significantly greater on the deviated side than on the non-deviated side before surgery, and there was no difference after surgery. According to the linear mixed-effect model, only the changes in the mandibular plane angle had a significant effect on BF (p < 0.05). Conclusions: There was a difference in the amount of the OCA and BF between the deviated and non-deviated sides before surgery. The change in mandibular plane angle affects the change, especially on the non-deviated side, during the observation period.

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Section: Discussionmentioning

confidence: 99%

Comparison of the bite force and occlusal contact area of the deviated and non-deviated sides after intraoral vertical ramus osteotomy in skeletal Class III patients with mandibular asymmetry: Two-year follow-up

Kwon¹,

Park²,

Jung³

et al. 2022

Korean J Orthod

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“…This might imply that the imbalance of occlusal force does not correlate with the distribution of muscle activity. EMG studies [ 19 , 39 , 40 , 41 ] evaluated healthy and asymptomatic subjects who showed asymmetric muscle activity and concluded that unbalanced or asymmetrical activity is not a muscle pathology in healthy subjects. Naeije et al [ 19 ] showed that the asymmetry in muscle activity depends on the clenching level.…”

Section: Discussionmentioning

confidence: 99%

Computerized Assessment of Occlusion and Muscle Activity during Use of a Multilayer Clear Retainer: A Preliminary Study

Kim

Choi

et al. 2021

Sensors

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The aim of this preliminary study was to evaluate the short-term changes of occlusal contacts and muscle activity after orthodontic treatment during the use of a multi-layer clear retainer. Evaluation was done with the T-scan and BioEMG systems. A total of 18 subjects were included, who were evaluated at three time intervals—T0 at debonding, T1 at one month after retainer delivery, and T2 at four months after retainer delivery. The T-scan and electromyography (EMG) data were recorded simultaneously. The T-scan system recorded the occlusion time, disclusion time and force distribution. The EMG waves were quantified by calculating the asymmetry index and activity index. The time variables changed but not significantly. Occlusal force decreased in the anterior dentition and increased in the posterior dentition during T0–T2. There was no clear evidence of a relationship between unbalanced occlusal forces and muscle activity. In most subjects, the temporalis anterior muscle was more dominant than the masseter muscle. From this preliminary computerized study, there were no significant changes in the state of the occlusion or muscle activity during the short-term retention period.

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“…Las indicaciones más comunes para el tratamiento quirúrgico son las clases II y III esqueléticas severas, y las discrepancias esqueléticas verticales en pacientes que ya no están en crecimiento 35 . El objetivo del tratamiento no es solo mejorar la estética facial y la oclusión funcional, sino lograr la recuperación del sistema estomatognático 36 .…”

Section: Presencia De Asimetría En El Rostro Humanounclassified

Alternativas diagnósticas y de tratamiento para la corrección de asimetrías faciales: Revisión bibliográfica.

Reyna

Prado

Orozco

et al. 2022

Rev Cient Odontol (Lima)

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La simetría facial hace referencia a una coincidencia completa de cada componente facial sobre el plano sagital, mientras que la asimetría se refiere a la diferencia bilateral entre dichos componentes. La presencia de una simetría bilateral perfecta casi nunca se presenta en el cuerpo humano, es decir no se encuentra con facilidad, por lo que es más común que en los individuos predomine la asimetría facial. Sin embargo, en ocasiones, una asimetría facial significativa da como resultado no solo a problemas funcionales, sino también estéticos. Mediante esta investigación se busca determinar las alternativas, el diagnóstico y plan de tratamiento ideal para la corrección de cada tipo de asimetría facial de la mano de la cirugía ortognática. Para ello, se realizó la revisión de artículos los cuales fueran publicados entre los años 2015 hasta la fecha. Seleccionando aquellos que estuvieran enfocados en describir o evaluar la simetría y asimetría tanto facial como dentofacial, tipo de diagnóstico o plan de tratamiento, incluyendo casos clínicos. Se utilizó el buscador de Google, SciELO y bases de datos de interés médico, como PubMed, PMC y Medigraphic. De acuerdo a las investigaciones y tratamientos realizados durante los últimos años dentro de la clínica dental, queda comprobado que el tratamiento ortognático acompañado de una planificación previa, es la mejor opción para el manejo de las asimetrías faciales esqueletales.

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Short-term changes in muscle activity and jaw movement patterns after orthognathic surgery in skeletal Class III patients with facial asymmetry

Cited by 4 publications

References 27 publications

Comparison of the bite force and occlusal contact area of the deviated and non-deviated sides after intraoral vertical ramus osteotomy in skeletal Class III patients with mandibular asymmetry: Two-year follow-up

Comparison of the bite force and occlusal contact area of the deviated and non-deviated sides after intraoral vertical ramus osteotomy in skeletal Class III patients with mandibular asymmetry: Two-year follow-up

Computerized Assessment of Occlusion and Muscle Activity during Use of a Multilayer Clear Retainer: A Preliminary Study

Alternativas diagnósticas y de tratamiento para la corrección de asimetrías faciales: Revisión bibliográfica.

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