Removable prostheses help people regain lost teeth and live their daily lives comfortably. However, when these prostheses are first fitted, some people may experience a period of adjustment. During this period, the person wearing the removable prosthesis may have some problems with speech, eating, chewing, and keeping the prosthesis in place. Over time, removable prostheses may wear out or break. Another disadvantage of removable prostheses is that if the person loses jaw fit, it may be necessary to replace the dental prostheses. Also removable dentures are usually made of plastic, so color changes may be observed over time and clasps tend to be visible.