Given the task definition and input, reply with output. Indicate the presence of numerical data in the abstract (whether numerical data plays a key role in medical records), solely using the information from the abstract.

Abstract: Two cases of osteochondritis dissecans of the talar dome treated by closed percutaneous drilling are presented to illustrate a procedure for high-risk patients. The operation is performed with the aid of an image intensifier. The ostoechondral fragment is percutaneously drilled to avoid open operation and osteotomizing the medial malleolus.
Question: Does the abstract contain any numerical data?
No