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 Porosity measurements in four types of hand-mixed  cements  showed  that __________  cement had the highest porosity. and explain in detail?
Porosity measurements in four types of hand-mixed cements showed that polycarboxylate cement had the highest porosity and resin cement had the least. Zinc phosphate and GICs had intermediate amounts of porosity.
Ref: Phillip’s Science of Dental Materials ed 12 pg 320