Dilaceration — MFDS Part 1 MCQ
Instant feedback + full explanation. One question, done properly.
Educational content. Not a substitute for clinical judgement or local policy.
Reveal the answer and explanation
Correct answer: E — An abrupt bend or deviation in the long axis of a tooth
Dilaceration is an abrupt bend or deviation in the long axis of a developing tooth, commonly affecting the root or the crown–root relationship. It is a developmental anomaly; trauma to a primary predecessor is a recognised cause, but other developmental disturbances may also be responsible. Option C describes fusion, in which two developing tooth germs unite through dentine. Option A describes dens invaginatus, an enamel-lined infolding that may extend into the root. Option D describes taurodontism, characterised by an elongated pulp chamber and apically displaced pulpal floor or furcation. Option B describes enamel hypoplasia, a quantitative defect of enamel formation. Therefore, A is the single best answer.
Reference: Jafarzadeh H, Abbott PV. Dilaceration: review of an endodontic challenge. Journal of Endodontics. 2007;33(9):1025–1030. https://pubmed.ncbi.nlm.nih.gov/17931926/