An osteotome includes a penetration tool which is to be driven into a bone and a separate, elongate driving tool for use in driving the penetration tool into the bone. The penetration tool has a tapered penetration end and an opposite end including at least one curved formation. The driving tool has an operative end including another curved formation which is shaped to engage the curved formation at the said opposite end of the penetration tool. With the curved formation at the operative end of the driving tool engaged with the curved formation at the said opposite end of the penetration tool, the driving tool can be used to transmit a driving force to the penetration tool to drive the penetration tool into the bone. The complemental curvatures of the formations enable the driving tool to be applied to the penetration tool at different angles, facilitating access to different regions of the mouth. The invention encompasses the penetration tool and the driving tool per se.