The Dentist, painted by Sir John Lavery, depicts Conrad Ackner performing surgery on his wife at his dental practice in London, United Kingdom. This painting is significant in terms of art history for dental historians as it is an accurate and exceptional resource for understanding twentieth century dentistry. The clinical equipment is well represented by the artist with the x-ray machine most prominent. This detail shows Ackner's commitment to progress and modernity in his practice. The Dentist was exhibited at the Royal Society of Portrait Painters Exhibition in 1929 at the Grafton Galleries before being returned to the artist.