Some patients require minor oral surgical procedures before receiving a partial or complete denture in order to ensure the maximum level of comfort. A denture sits on the bone ridge, so it is very important that the bone is the proper shape and size. If a tooth needs to be extracted, the underlying bone might be sharp and uneven. For the best fit of a denture, the bone might need to be smoothed or reshaped. Occasionally, excess bone may need to be removed prior to denture insertion.