Final answer:
The costochondral bone is the most common autogenous material used to replace the condyle due to its shape and growth potential, making it suitable for TMJ reconstruction. The iliac crest and femur condyles are alternative sources but are not typically preferred for condylar replacement.
Step-by-step explanation:
The most common autogenous material used to replace the condyle is the costochondral bone. This is due to its similar size and shape to the mandibular condyle and its capacity for growth, making it especially useful in children.
Autogenous grafts using costochondral bone have been used to replace the condylar part of the temporomandibular joint (TMJ) with success.
For instance, the iliac crest is another type of autogenous graft material, commonly used for bone grafting procedures. Although it does not naturally mimic the shape of the condyle, it has a rich supply of cancellous bone that is useful for osseous reconstruction in various parts of the body.
The femur, specifically the medial or lateral condyles, may also be considered for autogenous grafts, but they are not the most commonly utilized for condylar reconstruction due to differences in anatomy and intended function compared to the mandibular condyle.