"Monkey face" the upper jaw is behind the lower jaw.  This can lead to abnormalilties in tooth allignment resulting in the need for dental cleanings.  Some of the conditions can be corrected when the pet is young, if the pet hasthe genetic ability for normal jaw growth. 

Fracture of the canine teeth, as seen here, can cause abscess and loss of the canine.  Most often these frctured teeth can be painful.  Treatment may involve Root Canal therapy, Vital pulpotomy (cavity type restoration) or extraction.  Do not allow you dog to chew ice, play with tennis balls, tug of war, or chew hard objects such as stones, sticks, or catch baseballs.