You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is A 37 year old female patient complains of discoloration with her upper front teeth. Intra-oral examination reveals Intrinsic staining with maxillary incisors. Dentist prepares teeth to receive direct composite veeners. Which of the following  instrument material cannot be used in this case ? and explain in detail?
None