Orthodontic Treatment Combined with Mandibular Distraction Osteogenesis and Changes in Stomatognathic Function

Maeda, Aya; Soejima, Kazuhisa; Ogura, Mikinori; Ohmure, Haruhito; Sugihara, Kazumasa; Miyawaki, Shouichi

doi:10.2319/111907-539.1

Cited by 14 publications

(12 citation statements)

References 32 publications

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“…In humans, masseter muscle EMG activity is higher on the side with the greater occlusal contact during submaximal clenching . In patients with scissors bite, the occlusal contact area was reduced because of a lack of intercuspation of the maxillary and mandibular teeth . It is thought that the loss of occlusal contact area on the scissors‐bite side is related to our results that show a decrease in masseter and temporal activity on the scissors‐bite side during masticatory chewing.…”

Section: Discussionsupporting

confidence: 49%

Posterior scissors‐bite: masticatory jaw movement and muscle activity

Tomonari

Kubota

Yagi

et al. 2014

J of Oral Rehabilitation

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Scissors-bite is a malocclusion characterised by buccal inclination or buccoversion of the maxillary posterior tooth and/or linguoclination or linguoversion of the mandibular posterior tooth. This type of malocclusion causes reduced contact of the occlusal surfaces and can cause excessive vertical overlapping of the posterior teeth. This case-control study is the first to evaluate both masticatory jaw movement and masseter and temporalis muscle activity in patients with unilateral posterior scissors-bite. Jaw movement variables and surface electromyography data were recorded in 30 adult patients with unilateral posterior scissors-bite malocclusion and 18 subjects with normal occlusion in a case-control study. The chewing pattern on the scissors-bite side significantly differed from that of the non-scissors-bite side in the patients and of the right side in the normal subjects. These differences included a narrower chewing pattern (closing angle, P < 0.01; cycle width, P < 0.01), a longer closing duration (P < 0.05), a slower closing velocity (P < 0.01) and lower activities of both the temporalis (P < 0.05) and the masseter (P < 0.05) muscles on the working side. In 96% of the patients with unilateral posterior scissors-bite, the preferred chewing side was the non-scissors-bite side (P = 0.005). These findings suggest that scissors-bite malocclusion is associated with the masticatory chewing pattern and muscle activity, involving the choice of the preferred chewing side in patients with unilateral posterior scissors-bite.

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Section: Discussionsupporting

confidence: 49%

Posterior scissors‐bite: masticatory jaw movement and muscle activity

Tomonari

Kubota

Yagi

et al. 2014

J of Oral Rehabilitation

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“…The goal of orthodontic treatment is to improve dentofacial aesthetics and function . It has been reported that masticatory function such as masticatory chewing pattern, masticatory muscle activity, maximum occlusal force (MOF) and occlusal contact area (OCA) improved after orthodontic treatment …”

Section: Introductionmentioning

confidence: 99%

“…In a measurement of physical function, HS is used as a convenient and useful measurement method, and collated with lower arm and leg strength . On the other hand, MOF and OCA is associated with maxillofacial morphology, such as high mandibular plane (Mp) angle and long face, and with malocclusion such as open bite, posterior crossbite and scissor bite . However, the relationships between maxillofacial morphology/malocclusion and HS remain unclear.…”

Section: Introductionmentioning

confidence: 99%

Relationships of maxillofacial morphology and malocclusion with handgrip strength in adult women

Nakagawa

Maeda‐Iino

Miyawaki

2019

Orthod Craniofacial Res

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Objectives: Maxillofacial morphology and malocclusion are related to maximum occlusal force (MOF). Although it has been reported that MOF was related to handgrip strength (HS), the relationships between maxillofacial morphology/malocclusion and HS remain unclear. This study aimed to examine the relationships between maxillofacial morphology, malocclusion and HS.Setting and sample population: Eighty-five women with malocclusion, aged 18-40 years, were selected. Materials and methods:Lateral cephalometric radiographs (SNA, SNB, ANB, mandibular plane-FH, and gonial angles, overjet and overbite), the Peer Assessment Rating (PAR) index and HS were measured. Subjects were classified by the Japanese normal mean value of cephalometric analysis or the reference value which was defined by degree of malocclusion in each PAR index measurement item (small/low: value < mean/reference value, large/high: value ≧ mean/reference value).Measurements were then compared between groups.Results: HS of the large-gonial angle group was lower than that of the small-gonial angle group. In the small-overbite group or high-transverse (PAR index score showing crossbite/scissor bite in the canine and molars) group, HS in the large-gonial angle group was significantly lower than that in the small-gonial angle group. Conclusions:Our results suggest that gonial angle is the largest factor affecting HS.HS may be especially low in those subjects with a large gonial angle and a small overbite or a crossbite/scissor bite in the molar section. K E Y W O R D Shandgrip strength, malocclusion, maxillofacial morphology, maximum occlusal force, PAR index

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“…Malocclusion has been reported [8][9][10][11][12] to induce predominantly vertical or chopping type chewing and a prolonged cycle duration during chewing. While the chewing pattern of patients with a Class II division 2 malocclusion remains to be established, studies 20,21 have suggested that deep bite malocclusion influences the shape of the chewing cycle and the consistency of chewing cycle kinematics.…”

Section: Class II Division 2 Treatment and Functional Changesmentioning

confidence: 99%

“…Discrepancies in the posterior area have been assigned great importance in decisions regarding tooth extraction. 6,7 Malocclusion has been reported [8][9][10][11][12] to reduce stomatognathic function during mastication. However, the chewing pattern of a patient with a Class II division 2 malocclusion and the changes in stomatognathic function after orthodontic treatment remain unclear.…”

Section: Introductionmentioning

confidence: 99%

Extraction treatment of a Class II division 2 malocclusion with mandibular posterior discrepancy and changes in stomatognathic function

Nagayama

Tomonari

Kitashima

et al. 2015

The Angle Orthodontist

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This case report describes the successful extraction treatment of a Class II division 2 malocclusion with mandibular posterior discrepancy and a congenitally missing maxillary lateral incisor on the left side. The posterior space in the mandibular arch was small, and the mandibular second molars were impacted, with distal tipping. The discrepancies in the maxillary and mandibular arches were resolved by extraction of the maxillary lateral incisor on the right side and the mandibular second premolars on both sides. The mesial movement of the mandibular first molars occurred appropriately, with the second molars moving into an upright position. A lip bumper was used with a preadjusted edgewise appliance in the maxillary dentition to reinforce molar anchorage and labial movement of the retroclined incisors. Despite the extraction treatment, a deep bite could be corrected without aggravation as a result of the lip bumper and utility arch in the mandibular dentition. Thus, an Angle Class I molar relationship and an ideal overbite were achieved. The occlusal contact area and masticatory muscle activities during maximum clenching increased after treatment. The maximum closing velocity and the maximum gape during chewing increased, and the chewing pattern changed from the chopping to grinding type. The findings in the present case suggest that the correction of a deep bite might be effective for improving stomatognathic function. (Angle Orthod. 2015;85:314-321.)

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Orthodontic Treatment Combined with Mandibular Distraction Osteogenesis and Changes in Stomatognathic Function

Cited by 14 publications

References 32 publications

Posterior scissors‐bite: masticatory jaw movement and muscle activity

Posterior scissors‐bite: masticatory jaw movement and muscle activity

Relationships of maxillofacial morphology and malocclusion with handgrip strength in adult women

Extraction treatment of a Class II division 2 malocclusion with mandibular posterior discrepancy and changes in stomatognathic function

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