Is it permissible to perform tayammum instead of ghusl after menstruation due to fear of wound inflammation and difficulty bending, while being able to perform wudu', and is it obligatory to perform tayammum for every wudu' if tayammum was performed for ghusl?

If you know that wiping over the splint will harm you, then wash your entire body except for the wound and its surrounding area, then perform tayammum (definition) for the wound. If you are unable to wash all the limbs, then wash what you can and perform tayammum for the rest. Wudu is not part of the ghusl (definition) from menstruation; rather, one must perform ghusl along with tayammum for the wound if possible, otherwise tayammum alone is obligatory.