Depending upon which bone is broken, the cast may be either short or long.  A short arm cast is usually used if a wrist bone is broken. This cast would extend from the knuckles to below the elbow. (Sometimes a long cast will be used to prevent the person from twisting his wrist and putting it out of alignment.) A long arm cast is put on if the forearm or elbow is broken. The cast would go from the knuckles to the upper arm. Fractures of the humerus (upper arm) are treated either with a sling or a brace, but not a cast. A cast is a hard bandage that protects the bone as it heals. The hard, outer shell is lined within with soft padding that will make it more comfortable. There are two types of materials that casts are sometimes made of:  Plaster. Plaster is a white powder that is mixed with water and then allowed to harden into the outer shell of the cast. Plaster is easier to work with because it sets more slowly. This gives the doctor more time to work. It also means it gives off less heat, making burns less likely.  Fiberglass. Fiberglass is a type of plastic. It is lasts longer, is lighter, and is better for X-rays than plaster. This may include:  Tape Scissors A basin of water. The water temperature affects how quickly the casting material will set. It will set faster with warmer water. In general for plaster casts, the water should be lukewarm. For fiberglass the water should be room temperature or cooler. Casting gloves, if your doctor will use fiberglass Padding Plaster or fiberglass casting material Sheets or pads to cover you and keep your clothing clean A stockinette The doctor will put on the padding which will go on the inside of the cast.  The doctor will first position your arm so that the bones will heal correctly. You will first have a stockinette put on your arm. It will likely be about 4 inches longer above and below the injured area that the doctor will put the cast on. The stockinette will likely be 2 or 3 inches wide. The doctor will smooth it to prevent it from wrinkling. The doctor may...

===
Write a summary of the previous text in Indonesian:
Tanyakan kepada dokter tentang jenis gips yang akan dipasang. Tanyakan kepada dokter bahan apa yang digunakan untuk membuat gips. Perhatikan bagaimana dokter menyiapkan bahan-bahan yang diperlukan, di antaranya: Biarkan dokter mempersiapkan lengan Anda. Perhatikan saat dokter mengoleskan gips. Beri tahu dokter jika gips terasa panas.