A defective product claim typically involves technical aspects. The fault might lie in a design that cannot bear the stress of a product's intended use. Maybe the design would have been sufficient if other, more durable materials had been used. Expert witnesses sometimes are tapped to explain these points in a legal case. Depending on the facts of the case, one or more experts may be needed, including biomechanical engineers, civil engineers, physicians, ergonomic engineers or metallurgical engineers. Reaching out to a law office that represents product liability cases could connect an injured party with appropriate expert witnesses skilled at explaining technical subjects to a jury.