“…Most cases were treated successfully with gap arthroplasty including a condylectomy (Tomlinson and Presnell, 1983;Sullivan, 1989;Mark et al, 1996;Meomartino et al, 1999;Maas and Theyse, 2007). In an experimental study of the functional and anatomic changes after gap arthroplasty using an animal model, it was reported gap arthroplasty for TMJ ankylosis did not restore the TMJ functionally and histologically to the preexisting state (Matsuura et al, 2001). In human medicine, a variety of interposition materials have been used to prevent recurrence after the treatment of TMJ ankylosis, including skin, temporalis muscle, costochondral, auricular cartilage, non-biological material (Chossegros et al, 1999;Erol et al, 2006;Matsuura et al, 2006;Takaishi et al, 2007).…”