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The effect of a Clark twin block on mandibular motion: a case report
Catherine O'Shea1, Andrew Quick, Gillian Johnson
1Royal Children's Hospital, Brisbane, Queensland, Australia.
Aims:
To investigate mandibular motion in six degrees of freedom before, during and after twin block treatment in one individual.
Methods:
The appliance was worn for eight months, and motion recordings, using a 12-camera opto-electric system, were captured prior to placement of a twin block appliance and 2, 4, 14 and 52 weeks after insertion.
Results:
The wide variations in mandibular motion that accompany twin block wear disappeared post-treatment, except for an increase in anteroposterior movement of the mandible.
Conclusion:
Twin block therapy appears to affect mandibular motion temporarily.
