This dinosaur restoration is inaccurate, or its accuracy is disputed.
Reason: The teeth should not be visible when its mouth is closed, due to a recent research suggesting that non-beaked theropods had lips.
You may ask further questions about the accuracy of this image at the image review page of WikiProject Dinosaurs on the English Wikipedia. Note that this image may be appropriate to illustrate obsolete paleontological views.
English: Restoration of the theropod dinosaur Dilong paradoxus, based on the holotype IVPP V14243.[1]
Skeletal measurements of IVPP V14243 (selected)
Skull: 16.6 cm.
Scapula: 6.9 cm.
Humerus: 9.6 cm.
Ilium: 13.8 cm.
Femur: 18.1 cm.
Tibia: 20.3 cm.
Metatarsus: ~11 cm.
References
↑Xu X., Norell M.A. & Wang X. (2004). "Basal tyrannosauroids from China and evidence for protofeathers in tyrannosauroids". Nature431(7009): p. 680-684. DOI: 10.1038/nature02855 (with supplementary material)