Making Large Plaster Casts

Automatic 3D modeling of palatal plaster casts

This work introduces a procedure for automatic 3D modeling and discusses its performance in the context of a medical application, namely the 3D modeling of palate’s casts. The general interest of the proposed method lays in the fact that a widespread use of 3D modeling in non-engineering applications requires automatic procedures. The specific interest is in the intriguing mixture of open issue...

Exothermic properties of plaster–synthetic composite casts

PURPOSE Plaster casts can cause burns. Synthetic casts do not. Composite plaster-synthetic casts have not been thoroughly evaluated. This study analyzed the temperature from plaster casts compared with composite casts in a variety of in vitro conditions that would simulate clinical practice. METHODS A Pyrex cylinder filled with constant body temperature circulating water simulated a human ext...

Accelerated Drying of Plaster Casts with a Microwave Oven

Calcined gypsum (calcium sul­ phate hemihydrate, CaS04 1/2H20), commonly known as plas­ ter of Paris, is used extensively in forming casts to immobilize parts of the body and for making molds used in the manufacture of orthotic and prosthetic devices. Plaster models and casts have several advantages, and a few disadvantages. Widely available, plaster is inert, sufficiently stable dimensionally,...

Energy costs of walking in lower-extremity plaster casts.

The energy cost of walking with axillary crutches and each of three types of plaster casts (long, short, and cylinder) on the lower extremity was measured in twenty normal adult men. The knee and ankle joints were immobilized unilaterally in the neutral positions. Oxygen uptake was measured using a modified Douglas-bag technique. Heart rate, respiratory rate, and step frequency were telemetered...

Fracture of the spine; new treatment without plaster casts.