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PubMed1991

[Furcation lesions in deciduous teeth].

The area of furcation of temporary molars constitutes a zone of exchanges and rearrangements relating to the evolution of the sub-adjacent permanent tooth. It is subjected to the eruption of the latter and to the physiological modifications of the temporary tooth. Moreover, this area is the site of above-mentioned inflammatory or infections conditions, maintained or aggravated by anatomical factors (accessory canals, thin pulpar floor, with little calcified dentine and broad tubuli), physiological factors (multiplication of accessory canals, decrease in the floor and migration of the epithelial attachment), endodontic factors (pulpal involvement and its complications) and periodontal factors (septum syndrome). The pathology of furcation is an evolving lesion. When discovered early it can be treated by endodontic therapy, while, in a later phase, it will require the extraction of the tooth. The assessment is made on the basis of a X-Ray examination which permits the temporary tooth to be situated in its stable or labile phase, the condition of the pulpal floor to be evaluated and the stage of sub-adjacent germ mineralisation to be estimated. A periodontal arrangement, by coronal reconstitution, conditions the reliability of the endodontic therapies.

Child↗
PubMed1978

Homologies of the toothcomb.

A recently described juvenile specimen of Avahi was supposed to show that indriines have an unreplaced deciduous canine and that the indriine toothcomb was composed only of incisors. To the contrary, this specimen demonstrates quite dramatically a growth phenomenon earlier discussed: in indriines, the anteriormost of the four deciduous lower teeth posterior to the toothcomb migrates mesially toward the toothcomb (Schwartz, '74). In this particular Avahi, this tooth has even become associated with the toothcomb. The alignment of this tooth with the toothcomb is a strictly impermanent situation and cannot be taken into consideration when determining homologies of the teeth of the toothcomb. Morphologically and developmentally the lateral teeth of both indriine and lemur and loris toothcombs are similar to each other and distinct from the central set of teeth. Thus, if the lateral teeth of the lemur/loris toothcomb are canines, then the lateral teeth of the indriine toothcomb are canines as well.

Animals↗
PubMed1992

Lingually displaced mandibular canine teeth: orthodontic treatment alternatives in the dog.

Lingual displacements of mandibular canine teeth often occur following retention of deciduous canine teeth. This condition often results in trauma of occlusion to the lingual aspect of the maxillary canine tooth and the further development of a periodontal pocket or an oronasal fistula. This condition can be corrected using orthodontic appliances. The purpose of this paper is to discuss and illustrate the various alternatives available for correction of this common malocclusion in dogs.

Animals↗