TY  - JOUR
A1  - Glöggler, Julia C.
A1  - Hellmann, Daniel
A1  - Von Manstein, Maja
A1  - Jäger, Rudolph
A1  - Repky, Stefan
A1  - Beyersmann, Jan
A1  - Lapatki, Bernd G.
T1  - Motor learning might contribute to a therapeutic anterior shift of the habitual mandibular position—An exploratory study
JF  - Journal of Oral Rehabilitation
N2  - Background
Passive mandibular advancement with functional appliances is commonly used to treat juvenile patients with mandibular retrognathism.
Objective
The aim of this study was to investigate whether active repetitive training of the mandible into an anterior position would result in a shift of the habitual mandibular position (HMP).
Methods
Twenty adult healthy subjects were randomly assigned to one of two groups: a training group receiving six supervised functional training sessions of 10 min each and a control group without training. Bonded lateral biteplates disengaged occlusion among both groups throughout the 15‐day experiment. Customised registration‐training appliances consisted of a maxillary component with an anterior plane and a mandibular component with an attached metal sphere. Training sessions consisted of repeated mouth‐opening/closing cycles (frequency: 30/min) to hit an anteriorly positioned hemispherical target notch with this metal sphere. The HMP was registered at defined times during the experiment.
Results
The HMP in the training group showed a statistically significant anterior shift of 1.6 mm (interquartile range [IQR]: 1.2 mm), compared with a significant posterior shift of −0.8 mm (IQR: 2.8 mm) in the control group (p < .05). Although the anterior shift among the training group showed a partial relapse 4 days after the first training block, it then advanced slightly in the 4‐day interval after the second training block, which might indicate neuroplasticity of the masticatory motor system.
Conclusions
Motor learning by repetitive training of the mandible into an anterior position might help to improve the results of functional appliance therapy among patients with mandibular retrognathism.
KW  - mandibular advancement
KW  - mandibular shift
KW  - masticatory system
KW  - motor training
KW  - mandibular resting position
KW  - habitual mandibular position
KW  - masticatory muscles
KW  - motor skill learning
Y1  - 2021
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-262644
VL  - 48
IS  - 8
SP  - 891
EP  - 900
ER  - 
TY  - JOUR
A1  - Fadillioglu, Cagla
A1  - Kanus, Lisa
A1  - Möhler, Felix
A1  - Ringhof, Steffen
A1  - Schindler, Hans J.
A1  - Stein, Thorsten
A1  - Hellmann, Daniel
T1  - Influence of controlled masticatory muscle activity on dynamic reactive balance
JF  - Journal of Oral Rehabilitation
N2  - Background
The influence of the stomatognatic system on human posture control has been investigated under static conditions, but the effects on dynamic balance have not yet been considered.
Objective
Investigating the influence of different functional stomatognatic activities (jaw clenching (JAW), tongue pressing (TON) and habitual jaw position (HAB)) on postural performance during a dynamic reactive balance task.
Methods
Forty‐eight physically active and healthy adults were assigned to three groups differing in oral‐motor tasks (JAW, TON or HAB). Dynamic reactive balance was assessed by an oscillating platform which was externally perturbed in four directions. Performance was quantified by means of Lehr's damping ratio. Mean speeds of the selected anatomical regions (head, trunk, pelvis, knee and foot) were analysed to determine significant performance differences.
Results
The groups differed significantly in balance performance in direction F (i.e., forwards acceleration of the platform). Post hoc tests revealed that the JAW group had significantly better performance compared with both the HAB and TON groups. Better performance was associated with a decreased mean speed of the analysed anatomical regions.
Conclusion
JAW can improve dynamic reactive balance but the occurrence of positive effects seems to be task‐specific and not general. TON seems not to have any observable effects on dynamic reactive balance performance, at least when evaluating it with an oscillating platform. JAW might be a valuable strategy which could possibly reduce the risk of falls in elderly people; however, further investigations are still needed.
KW  - jaw clenching
KW  - perturbation
KW  - postural control
KW  - posturomed
KW  - stomatognatic system
KW  - tongue pressing
Y1  - 2022
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-262436
VL  - 49
IS  - 3
SP  - 327
EP  - 336
ER  -