They can be both depending on the material used.
www.Archwired.com has a thread with loads of pics of coloured ligatures.
nonabsorbable sutures have to be removed
It depends whether it is absorbable or non-absorbable. Absorbable ones are made from polyglycolic acid, polylactic acid, and polydioxanone. However the non-absorbable ones are made from polypropylene.
Mostly clarinets and saxophones use ligatures but there might be a few obsolete instruments that use ligatures.
Nonabsorbable stitches retain their strength for months to years and may never be absorbed by the tissue. They are generally used for skin and removed once the wound has sufficiently healed.
hippocrates
Two types of rubber bands that are available for braces are single elastic ligatures and connected elastic ligatures. Both ligatures are available in a variety of colours and would need to be changed at every appointment as they lose strength over time.
Linkers/ligatures.
Mathieu pliers
carbohydrates
The short answer is yes. Sutures are used to hold skin or parts of your body together. When they are used internally, they can be absorbable or non-absorbable sutures. Non-absorbable sutures can be left in the body for a number of reasons and usually to hold something together for life, like a vasectomy, and as the name suggest absorbable sutures will absorbe into your body over time and never need removing.
An absorbable hemostat is a medical device used to control bleeding by promoting clot formation. It is made of materials that can be absorbed by the body over time, eliminating the need for removal after the bleeding is controlled. This type of hemostat is often used in surgeries and procedures where temporary control of bleeding is necessary.