Iatrogenic intra-temporomandibular joint emphysema during injection: A case report

The temporomandibular joint has a variation in its atmospheric pressure during the mouth movement, although the intra-articular injection is widely used as one of the management strategies for reducing the pain and enhancing the mouth movement range, there are atmospheric fluctuations in the joint space due to make a passage between this closed spaces and the external medium when the needle inserted into the joint capsule. This report presents iatrogenic emphysema in two cases, while this emphysema is absent in a different case. • Cases of iatrogenic emphysema are a cause of patient panic, despite their spontaneous remission. • The upper joint space of TMJ is variable in atmospheric pressure when opening and closing the mouth. • PRP helps reduce TMD symptoms.