Sagittal and vertical aspects of Class II division 1 subjects according to the respiratory pattern

Scrobotă

et al. 2019

IJERPH

Our study is based on the hypothesis that the prevalence of malocclusions in children is higher in the mining areas from North-Western (NW) Romania than in other geographic areas. We also considered that the distribution of the different types of malocclusions can be correlated with environmental factors. Therefore, the main purpose of the current study was to assess the prevalence of malocclusions in children from the mining areas in NW Romania. Another purpose was to establish the influence of certain environmental factors such as gender, geographical area of origin, and ethnicity on the distribution of malocclusions in order to provide an epidemiological reference for the planning of preventive and treatment programs adapted to the particularity of the mining areas. This cross-sectional study was performed in 2015–2016. The study batch consisted of 960 children from the mining areas, aged 7–14 years, in the period of mixed dentition and early permanent dentition. The clinical examination was conducted by a single examiner, an orthodontic specialist (TBI), in order to avoid inter-operator bias. Occlusion was registered according to Bjoerk. Occlusal clinical signs were followed for the determination of malocclusions. Most children had malocclusions (93.5%). The percentage of anomalies was significantly higher in subjects from Rosia Montana, in girls, and in the Romanians. Data showed that Angle Class I was the most prevalent malocclusion (60.21%), followed by crowding (47.5%), midline shift (43.33%), and deep bite (28.65%). The independent association between ethnicity and total malocclusions shows that the Romanian subjects presented a 3.31 higher chance of developing malocclusions than the Romani ones. The presence of malocclusions was independently influenced by all the studied environmental factors, namely gender, geographical area, and ethnicity. Our results could be relevant for oral health policy-making, i.e., planning preventive and treatment measures of malocclusions, adapted to the peculiarity of the studied mining areas.

Section: Discussionsupporting

confidence: 86%

Environmental Factors Associated with Malocclusion in Children Population from Mining Areas, Western Romania

Scrobotă

et al. 2019

IJERPH

“…According to our study, children in the MB-N group were more likely to have increased anterior lower facial height, overjet, and proclination of upper incisors, which were consistent with some research results [32,33]. Mouth-breathing children were likely to have an increased ratio of anterior lower facial height to posterior height with the clockwise rotation of the mandible [24,34].…”

Section: Discussionsupporting

confidence: 90%

A non-randomized concurrent controlled trial of myofunctional treatment in the mixed dentition children with functional mouth breathing assessed by cephalometric radiographs and study models

Habumugisha

Cheng

et al. 2022

BMC Pediatr

Objectives This study aimed to examine the clinical effects of myofunctional treatment on children with functional mouth breathing by cephalometric radiographs and study models. Methods A total of 224 children (6–10 years old; 114 males and 110 females; SNA°: 82.24 ± 1.67°; ANB°: 2.79 ± 0.80°, 28° < SN-GoGn° < 37°) formed three groups: MB-M group (mouth breathers with myofunctional treatment,n = 75); MB-N group (mouth breathers with no treatment,n = 70); NB group (nasal breathers with no treatment, n = 79). A blind evaluation of cephalometric radiographs and study models was conducted at T1(pre-study) and T2 (post-study), respectively. Results Two hundred four children (MB-M:66, MB-N:68, NB:70) completed the present study. At T1, MB-M and MB-N groups, compared to their NB counterpart, had greater anterior lower facial height(P < 0.01) and overjet(P < 0.001) but shorter overbite and maxillary canines width (P < 0.001). At T2, the MB-N group exhibited a higher ANB angle, anterior lower facial height, and overjet, but shorter overbite and maxillary canines width (P < 0.001). From T1 to T2, the anterior lower facial height increased, overbite and the maxillary canines width further decreased in the MB-N group (P < 0.001). However, in the MB-M group, the incisors were retracted, overbite increased (P < 0.001), anterior lower facial height increased insignificantly (P > 0.05), and maxillary canines width increased slightly (P < 0.05). In the NB and MB-M groups, the mandible showed a normal tendency to grow forward, whereas, in the MB-N group, the mandible showed a tendency to grow downward (P < 0.001). Conclusions Mouth breathers demonstrated increased anterior facial height and overjet but reduced overbite and maxillary arch width, which improved significantly following myofunctional treatment. Trial registration TCTR: TCTR20220401001. Registered 1stApril 2022-Retrospectively registered.

Brazilian Journal of Otorhinolaryngology

“…Mouth breathing was related to: (i) the development of posterior crossbite and increased dental overjet in patients with allergic rhinitis 1 , 22 ; (ii) highest prevalence of hard, narrow, and high-arched palate 3 , 23 ; (iii) hypertrophic adenoids with markedly convex facial profile 4 ; (iv) severe mouth breathing with changes in the nasolabial profile. 24 However, in other reports, there was no correlation between mouth breathing and facial pattern or malocclusions. 7 , 8 Genetic factors are likely to contribute to the presence of deficiency; therefore, further studies should be carried out.…”

Section: Discussionmentioning

confidence: 86%

Correlation between acoustic rhinometry, computed rhinomanometry and cone-beam computed tomography in mouth breathers with transverse maxillary deficiency

Sakai

Marson

Sakuma

et al. 2018