According to the USDA, heavy cream can be stored in the refrigerator (opened or unopened) for up to a month. 1  This assumes that it has been kept at a constant refrigerator temperature and not left out on the counter for stretches of time. Discard any cream with mold or an off odor.
However, one of the most common causes of lockjaw, as already mentioned, is TMJ disorder. TMJ disorder refers to a syndrome that affects the temporomandibular joint, commonly called the TMJ, which connects the jaw with the bottom of the skull.
Possible causes of TMD include: 1  clenching your jaw or grinding your teeth during sleep (bruxism) â which overworks the jaw muscles and puts pressure on the joint (often caused by stress). 2  wear and tear of the inside of the jaw joint â usually caused by osteoarthritis.emporomandibular disorder (TMD) is a problem affecting the 'chewing' muscles and the joints between the lower jaw and the base of the skull.