The mesioangular third molar--to extract or not to extract? Analysis of 776 consecutive third molars. - Allen RT; Witherow H; Collyer J; Roper-Hall R; Nazir MA; Mathew G; Allen, R T; Witherow, H; Collyer, J; Roper-Hall, R; Nazir, M A; Mathew, G (British Dental Journal, 2009)