Final answer:
Dental fillings are not typically analyzed at a medical laboratory, as they are restorative materials not reflective of physiological processes, unlike samples such as blood, urine, and saliva.
Step-by-step explanation:
The sample typically not analyzed at a medical laboratory is dental fillings. Medical laboratories primarily focus on samples that can provide information about a person's health status or the presence of a disease. Common samples analyzed include blood, urine, and saliva. These samples can offer insights into the body's metabolism, the presence of infections, and various other health indicators. Notably, blood plasma and urine are often tested for various ions like sodium, potassium, and chloride, which are crucial for evaluating bodily functions. However, dental fillings are not generally subjected to such analysis as they are materials used to restore tooth structure and do not reflect the body's physiological processes.