Changes

*'''Fusion''' of two tooth germs results in a single large tooth and one fewer tooth in the arch.

*'''Fusion''' of two tooth germs results in a single large tooth and one fewer tooth in the arch.

*'''Gemination''' is the attempt of a single [[Enamel Organ|enamel organ]] to make two teeth. The result is a tooth with two [[Enamel Organ#Crown|crowns]] on one [[Enamel Organ#Root|root]]. In single-rooted teeth, this cannot be differentiated from the fusion of the root of a normal tooth with that of a supernumerary tooth. In multirooted teeth, fusion of supernumerary teeth is more apparent. When complete separation forms two teeth from one tooth germ, the result is a type of supernumerary tooth called “twinning”. Supernumerary mandibular fourth premolar teeth are commonly bilateral in cats.

*'''Gemination''' is the attempt of a single [[Tooth - Anatomy & Physiology|enamel organ]] to make two teeth. The result is a tooth with two [[Enamel Organ#Crown|crowns]] on one [[Enamel Organ#Root|root]]. In single-rooted teeth, this cannot be differentiated from the fusion of the root of a normal tooth with that of a supernumerary tooth. In multirooted teeth, fusion of supernumerary teeth is more apparent. When complete separation forms two teeth from one tooth germ, the result is a type of supernumerary tooth called “twinning”. Supernumerary mandibular fourth premolar teeth are commonly bilateral in cats.

*'''Convergent roots''' occur most commonly on mandibular first molar teeth in small-breed dogs. Affected teeth frequently develop [[Endodontic Conditions|endodontic disease]]. The clinical crowns of affected molar teeth often appear normal except for a developmental groove close to the mid-buccal gingival margin. Premolar teeth can also have convergent roots, sometimes with incomplete separation of the roots during development.

*'''Convergent roots''' occur most commonly on mandibular first molar teeth in small-breed dogs. Affected teeth frequently develop [[Endodontic Conditions|endodontic disease]]. The clinical crowns of affected molar teeth often appear normal except for a developmental groove close to the mid-buccal gingival margin. Premolar teeth can also have convergent roots, sometimes with incomplete separation of the roots during development.