Relationships among nasal resistance, adenoids, tonsils, and tongue posture and maxillofacial form in Class II and Class III children

Iwasaki, Tomonori; Sato, Hideo; Suga, Hokuto; Takemoto, Yoshihiko; Inada, Emi; Saitoh, Issei; Kakuno, Eriko; Kanomi, Ryuzo; Yamasaki, Yuichi

doi:10.1016/j.ajodo.2016.10.027

Cited by 40 publications

(31 citation statements)

References 19 publications

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“…A three‐dimensional (3D) coordinate system and image were constructed with a medical image analysis system (Imagnosis VE, Kobe, Japan). The planes were defined as previously described . From these constructed cephalometric images, the anteroposterior positions of the maxilla and mandible were evaluated using the sella‐nasion‐A (SNA) angle, SNB angle, ANB angle and Frankfort mandibular plane angle (FMA).…”

Section: Methodsmentioning

confidence: 99%

“…The distance from the posterior outline of the soft palate to the closest point of the adenoid tissue in the midsagittal plane on CBCT images was used to classify the relative adenoid sizes into four groups . The narrowest distance between the tonsils in the midcoronal plane was used to classify the relative tonsil sizes into five groups …”

Section: Methodsmentioning

confidence: 99%

“…According to Moss's functional matrix theory, bone growth occurs in response to function . Therefore, nasal resistance, presence of adenoids, tonsil size and tongue posture are thought to affect the maxillofacial form …”

Section: Introductionmentioning

confidence: 99%

“…Previous study on the relationship between tongue posture and the maxillofacial form in children has shown that a low tongue is related to a narrow maxilla and a posterior cross‐bite, while tongue thrust is associated with an anterior open bite.…”

Section: Introductionmentioning

confidence: 99%

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Relationships among tongue volume, hyoid position, airway volume and maxillofacial form in paediatric patients with Class‐I, Class‐II and Class‐III malocclusions

Iwasaki

Suga

Yanagisawa‐Minami

et al. 2018

Orthod Craniofacial Res

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Objectives:To clarify the associations among tongue volume, hyoid position, airway volume and maxillofacial form using cone beam computed tomography (CBCT) data for children with Class-I, Class-II and Class-III malocclusion. Setting and SamplePopulation: Sixty children (mean age, 9.2 years) divided into Class-I, Class-II and Class-III malocclusion groups according to the A-nasion-B angle. Material and Methods: Cone beam computed tomography was used for threedimensional reconstruction of the maxillofacial region and airway. The hyoid position and the tongue, airway and oral cavity volumes were evaluated. Upper airway ventilation status was calculated using computational fluid dynamics. The groups were compared using analysis of variance and Kruskal-Wallis tests; relationships among the parameters were assessed using Pearson's and Spearman's rank correlation tests. Results:The tongue volume was larger in Class-III patients (50.63 cm 3 ) than in Class-I patients (44.24 cm 3 ; P < 0.05). The hyoid position was lower (49.44 cm), and anatomical balance (AB; tongue volume/oral cavity volume; 85.06%) was greater in Class-II patients than in Class-I patients (46.06 cm, 80.57%, respectively; P < 0.05 for both).The hyoid height showed a positive correlation with AB (r = 0.614; P < 0.001). Conclusions:Children with Class-III malocclusion have large tongue volumes and small AB; the reverse is true for children with Class-II malocclusion. The hyoid position is closely associated with AB in children with malocclusion.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Relationships among tongue volume, hyoid position, airway volume and maxillofacial form in paediatric patients with Class‐I, Class‐II and Class‐III malocclusions

Iwasaki

Suga

Yanagisawa‐Minami

et al. 2018

Orthod Craniofacial Res

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“…Lingual‐palatal stability maintains the palatal arch and supports the mid and lower anterior face. Low lingual resting posture has been correlated with both Class II and Class III malocclusions . The static lingual posture at rest slowly changes the face, the swallowing pattern and occlusion.…”

Section: Impact Of Oral Resting Posturesmentioning

confidence: 99%

Oral dysfunction as a cause of malocclusion

D'Onofrio

2019

Orthod Craniofacial Res

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Structured AbstractThis narrative review surveys current research demonstrating how oral dysfunction can escalate into malocclusion, acquired craniofacial disorder and contribute to generational dysfunction, disorder and disease.IntroductionBaseline orthodontic consultations are generally recommended beginning age seven. However, the dysmorphic changes that result in malocclusion are often evident years earlier. Similarly, following orthodontic treatment, patients require permanent retention when the bite is not stable, and without such retention, the malocclusion can return.Setting and PopulationNarrative review article including research on infants, children and adults.Materials and MethodsThis review is a brief survey of the symptomology of orofacial myofunctional disorder and outlines 10 areas of oral function that impact occlusal and facial development: breastfeeding, airway obstruction, soft tissue restriction, mouth breathing, oral resting posture, oral habits, swallowing, chewing, the impact of orofacial myofunctional disorder (OMD) over time and maternal oral dysfunction on the developing foetus.ConclusionMalocclusions and their acquired craniofacial dysmorphology are the result of chronic oral dysfunction and OMD. In order to achieve long‐term stability of the face, it is critical to understand the underlying pathologies contributing to malocclusion, open bite and hard palate collapse.

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