The effect of a Clark twin block on mandibular motion: a case report

O’Shea, Catherine; Quick, Andrew; Johnson, Gillian; Carman, Allan; Herbison, Peter

doi:10.2478/aoj-2010-0031

Abstract

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.

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