Though most dogs have a total of 42 permanent teeth, in rare occurrences a dog develops supernumerary teeth, or extra teeth. (petguide.com)
Craniosynostosis and supernumerary teeth most often occur as isolated developmental anomalies, but they are also separately manifested in several malformation syndromes. (completegenomics.com)
Your vet will be able to make recommendations for how to keep your dog's teeth clean and healthy — he will also be able to diagnose and treat supernumerary teeth. (petguide.com)