MHRA no: 884

Walrus crowns

Tusk at the impression stage
Patient's tusk at impression taking stage
Walrus tusk with crown
The same tusk after fitting.
Walrus tusk with crown
One of the tusks after fitting. The rate of eruption may be seen from the space that has opened between the casting and the gingival margin
Yuri the Walrus
One of the patients

In the winter of 2004, we completed a set of crowns for five walruses belonging to the Parque Oceanográfico de Valencia, the largest oceanographic park in Europe. The animals had been wearing away their tusks on the edge of their pool and the crowns were supplied to protect the tips from further damage.

Set of walrus crowns
The complete set of crowns

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Double Arm Swing-lock

Figure 1: class 3 jaw relationship, left-hand side

This case was first presented to Steve in 1993. The patient has a class 3 bite, as seen in figs 1,2 and 3, and wanted a denture made to present a class 1 appearance. Previous attempts had failed because the anterior teeth needed to be set so far forward of the ridge that they destabilised the whole appliance even with clasps. The challenge was to manufacture an upper denture that would be at once cosmetically pleasing, retentive and stable.

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