Ultrasonographic Thickness of the Masseter Muscle in Growing Individuals with Unilateral Crossbite

Kiliaridis, Stavros; Mahboubi, Payam H.; Raadsheer, M.C.; Katsaros, Christos

doi:10.2319/101105-360

Cited by 71 publications

(64 citation statements)

References 16 publications

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“…22 The decrease in bite force magnitude may reflect on orofacial structure growth and development, 2 and the abnormal movement of the mandible (mandibular shift) may contribute to adverse effects as well. 1,5 Furthermore, inadequate growth of craniofacial structures and dentofacial complex results from several genetic and environmental factors, for example oral breathing. 4 However, the correct diagnosis of oral breathing is controversial due to the definition criteria used, which are often subjective.…”

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confidence: 99%

Facial dimensions, bite force and masticatory muscle thickness in preschool children with functional posterior crossbite

et al. 2008

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Posterior crossbite may affect craniofacial growth and development. Thus, this study aimed to associate facial dimensions (by standardized frontal photographs) to masseter and anterior portion of the temporal muscle thickness (by ultrasonography) and maximal bilateral bite force in 49 children with deciduous and early mixed dentitions. They were distributed in four groups: deciduous-normal occlusion (DNO, n = 15), deciduous-crossbite (DCB, n = 10), mixed-normal occlusion (MNO, n = 13) and mixed-crossbite (MCB, n = 11). Anterior facial height (AFH), bizygomatic width (FWB), and intergonial width (FWI) were determined and associated with muscle thickness and bite force, applying Pearson's coefficients and multiple logistic regression, with age, gender, body weight and height as the covariates. FWB and FWI were correlated positively with the masseter thickness, whereas AFH/FWB and AFH/FWI ratios had negative correlation, except in the DNO group. The correlation between AFH/FWB and bite force in the MCB group was significantly negative. A higher AFH/FWB in MNO and MCB led to a significantly higher probability for functional crossbite development. In the studied sample, it was observed that children in the early mixed dentition with a long-face trend showed lower bite force and higher probability to present functional posterior crossbite, without significant influence of the covariates.

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Facial dimensions, bite force and masticatory muscle thickness in preschool children with functional posterior crossbite

et al. 2008

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“…TNC indices in healthy individuals were 3.4 ± 0.95; in patients with SB (n = 100) -50. The analysis of the masseter muscle thickness was conducted based on the gender of the patients, because it was established that the differences of these indices are statistically significant between men and women [18,19]. During the state of relaxation, the masseter muscle thickness was 9.75 ± 0.27 mm for women under 35 and of 9.82 ± 0.26 mm for older women (p > 0.05).…”

Section: Resultsmentioning

confidence: 99%

“…It is used for five consecutive nights in order to assess the average values of the motor indices: total clench time (TCT) during sleep and their number (TNC -total number of clenches). We have determined the thickness of the masseter muscle following the recommendations in the scientific literature [18,19] by applying the Envisor C (Philips, Japan) equipment and a 7.5 MHz linear transducer. The masseter muscle thickness gradient (MTG) was calculated according to the formula:…”

Section: Methodsmentioning

confidence: 99%

“…With aging, the microstructure of the masticatory muscles essentially changes; signs of osteoporosis that are associated with the changes in the masticatory Original Article muscles occur [17]. The thickness and hypertrophy of the masticatory muscles also depend on the age of the patients [18,19,20]. Based on the age factor, the degree of severity is also various for the manifestations of sleep bruxism.…”

Section: Introductionmentioning

confidence: 99%

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Manifestation of Sleep Bruxism According to the Age of Patients

Romaniuc¹,

Fala²,

Lacusta³

et al. 2018

EDUJ

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PhD, Univ. Prof., Academician d Neurology residentIntroduction: Bruxism is a widespread condition, affecting up to 85-90% of the general population, and in 5% of these individuals, the grinding evolves into a clinical condition. In many cases, sleep bruxism is latent, the disorder may be identified by its consequences (dental wear, etc.). This ascertains the need to develop diagnostic methods that may be able to identify bruxism at the initial stages of the disorder. Aim of the study: to determine the peculiarities of the clinical manifestation of primary sleep bruxism (SB) based on the age of the patients. Methodology: One hundred patients with primary SB (70 patients aged between 18-35 and 30 patients aged between 35-50) were investigated. The clinical features of SB (algic syndrome, myogenic disorders, temporomandibular disorders, dental wear, psychoemotional disorders, sleep quality alterations) were also investigated. Results: The expression of emotional stress in patients of various ages was almost identical. The highest clenching frequency and duration, as well as a higher clinical expression of sleep bruxism was observed in patients under 35. The components of the algic syndrome show a varied expression for different age groups -patients under 35 had more severe disorders of the nocturnal episodes and myogenic-spastic events; older patients (35-50) were characterized by a prevalence of local and diffuse myogenic structural disorders, arthrogenic pain and severe sleep disturbances. Conclusion: Electromyography and ultrasonography can reveal important morphofunctional peculiarities of the masticatory muscles that are associated with the severity of SB in patients from different age groups.

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“…7,8 This symmetric function reflects different development of the elevator muscles on each side of the jaws, leading to a thinner masseter muscle on the CB side, which is already seen in the early mixed dentition. 9 Therefore, early corrections of functional problems should prevent adverse dental and facial development. 5,6,10,11 Even though undesirable growth modifications in terms of skeletal asymmetry have been reported as a consequence of untreated functional CB, 8,10 further knowledge about the potential impact of untreated unilateral functional CB on facial growth is still needed.…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional evaluation of facial asymmetry in association with unilateral functional crossbite in the primary, early, and late mixed dentition phases

Primožič

Perinetti

Richmond

et al. 2012

The Angle Orthodontist

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Objective: To assess the degree of facial asymmetry associated with subjects with unilateral functional crossbite (CB) in the primary, early/intermediate, and late mixed dentition phases in comparison with a group of subjects without CB. Subjects and Methods: A group of 234 white subjects, 78 with CB (42 girls and 36 boys) and 156 without CB (73 girls and 83 boys), aged 3.9-11.9, grouped according to the dentition phase, were included. Three-dimensional laser scans of the subjects' faces were used to assess facial asymmetry. For each part of the face two-way multivariate analysis of covariance was performed to assess differences among the subjects, and an independent sample t-test was used to assess the significance of the differences between data sets. Results: Within all dentition phases, the subjects with CB had statistically significantly greater facial asymmetry of the whole face than the subjects without CB, with the greatest values in the lower part of the face (P , .05). In the middle part of the face a significant difference was observed in the mixed dentition phases. Conclusions: Children with unilateral functional CB exhibited a greater facial asymmetry than children without this malocclusion in all the dentition phases herein investigated. The greatest differences were seen for the lower part of the face. Further, facial asymmetry in the middle part of the face became clinically relevant in combination with the transition from primary to mixed dentition phase. (Angle Orthod. 2013;83:253-258.)

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Ultrasonographic Thickness of the Masseter Muscle in Growing Individuals with Unilateral Crossbite

Cited by 71 publications

References 16 publications

Facial dimensions, bite force and masticatory muscle thickness in preschool children with functional posterior crossbite

Facial dimensions, bite force and masticatory muscle thickness in preschool children with functional posterior crossbite

Manifestation of Sleep Bruxism According to the Age of Patients

Three-dimensional evaluation of facial asymmetry in association with unilateral functional crossbite in the primary, early, and late mixed dentition phases

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