Diagnostic Imaging in Veterinary Dental Practice

Duncan, Heather

doi:10.2460/javma.237.11.1251

Cited by 10 publications

(8 citation statements)

References 7 publications

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“…It is an interesting developmental abnormality that results when the developing tooth crown surface invaginates into the developing tooth pulp before mineralization has occurred (Figure 10 ). The result is a crown that varies from being normal to teeth with increased diameter, strange shapes, or extra cusps ( 62 , 63 ). The etiology and pathogenesis is mostly speculative and includes theories of pressure on or trauma to the developing tooth, focal failure, or excessive proliferation of the internal enamel epithelium or a form of fusion between two tooth germs ( 64 , 65 ).…”

Section: Odontogenesismentioning

confidence: 99%

“…Depending on the extent of invagination into the tooth pulp, DI is classified as type I (invagination in the crown only, which does not extend beyond the cementoenamel junction), type II (invagination extends beyond the cementoenamel junction into the root canal and ends as a blind sac), and type III (invagination extends through the root or lateral surface to form an additional opening or foramen but with no direct communication with the existing pulp canal) ( 64 ). This abnormality is uncommon, and only a few case reports on DI in dogs are found in the literature ( 62 , 66 , 67 ).…”

Section: Odontogenesismentioning

confidence: 99%

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Developmental Structural Tooth Defects in Dogs – Experience From Veterinary Dental Referral Practice and Review of the Literature

2016

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Developmental tooth abnormalities in dogs are uncommon in general veterinary practice but understanding thereof is important for optimal management in order to maintain masticatory function through preservation of the dentition. The purpose of this review is to discuss clinical abnormalities of the enamel and general anatomy of dog teeth encountered in veterinary dental referral practice and described in the literature. More than 900 referral cases are seen annually between the two referral practices. The basis of the pathogenesis, resultant clinical appearance, and the principles of management for each anomaly will be described. Future research should be aimed toward a more detailed analysis of these conditions so rarely described in the literature.

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Section: Odontogenesismentioning

confidence: 99%

Section: Odontogenesismentioning

confidence: 99%

Developmental Structural Tooth Defects in Dogs – Experience From Veterinary Dental Referral Practice and Review of the Literature

2016

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“…One developmental abnormality that has been previously documented in dogs appears to preferentially affect mandibular first molar teeth (4), also known as the mandibular carnassial teeth. The lesions frequently occur bilaterally (5)(6)(7)(8)(9)(10)(11) and are characterized by certain features when they affect the mandibular first molar teeth. The most common feature appears to be abnormal radiopaque structures within the crown (7,(9)(10)(11), but furcation abnormalities (6), abnormalities in coronal enamel (5,(7)(8)(9)(10), and root convergence (9,10) have also been reported with varying regularity.…”

Section: Introductionmentioning

confidence: 99%

“…The lesions frequently occur bilaterally (5)(6)(7)(8)(9)(10)(11) and are characterized by certain features when they affect the mandibular first molar teeth. The most common feature appears to be abnormal radiopaque structures within the crown (7,(9)(10)(11), but furcation abnormalities (6), abnormalities in coronal enamel (5,(7)(8)(9)(10), and root convergence (9,10) have also been reported with varying regularity. Periapical lucencies (6)(7)(8)(9)(10) and periodontitis (5,6,(8)(9)(10) are frequently evident and highlight the clinical significance of this condition.…”

Section: Introductionmentioning

confidence: 99%

“…However, the apparent predilection of this condition for bilateral involvement of the mandibular first molar teeth differs from that reported in dens invaginatus (12) and enamel pearls (13) in humans. Furthermore, descriptions of these lesions have primarily relied on radiographic findings and gross appearance (1,(4)(5)(6)(7)(8)(9)(10). Advanced imaging modalities have not been utilized to investigate its morphological features and histopathological analysis has only been applied in two reports (6,11).…”

Section: Introductionmentioning

confidence: 99%

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Mandibular Carnassial Tooth Malformations in 6 Dogs—Micro-Computed Tomography and Histology Findings

Rine

Choi

et al. 2019

Front. Vet. Sci.

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Objective: To document the clinical, radiographic, and histological characteristics of mandibular first molar teeth with developmental abnormalities previously attributed to dens invaginatus and enamel pearls in dogs. Materials and Methods: Affected mandibular first molar teeth from dogs were evaluated grossly and via intraoral radiography. Endodontically and/or periodontally compromised teeth were extracted and subjected to some combination of micro-computed tomography, histopathology, and immunohistochemistry with anti-amelogenin antibody. Results: Six dogs with developmental abnormalities of mandibular first molar teeth were identified, representing 11 affected teeth. The condition was bilateral in 5 dogs, while in 1 dog, only one mandibular first molar tooth was present. Patient weight ranged from 1.7 to 6 kg (median = 4.09 kg). On intraoral radiographs, root convergence or parallelism was noted in 6 of 11 teeth, and root dilaceration was noted in 3 of 11 teeth. Eight teeth required extraction due to periapical lucencies or periodontitis. On micro-CT, the abnormal teeth were characterized by the presence of abnormal, heterogenous hard tissue with beam attenuation characteristics midway between that of enamel and dentin. Enamel fissures were identified in 4 of 8 teeth, while ectopic radicular enamel was identified in 2 of 8 teeth. The abnormal tissue was traversed by channels measuring 20-40 µm in diameter. Channels communicated with the enamel fissures in 2/8 teeth, the furcation in 2/8 teeth and the pulp in 4/8 teeth. The abnormal tissue was frequently surrounded by disorganized dentin. Histologic features of enamel and dentin were absent from the abnormal tissue and immunohistochemistry to detect amelogenin in the abnormal tissue was negative in all samples. Conclusion: The dental abnormalities described here correspond to a previously unrecognized developmental abnormality involving the mandibular first molar teeth in dogs. The developmental origin of the abnormal tissue could not be ascertained, and further investigations are required to determine the mode of formation, origin of Ng et al. Mandibular Carnassial Tooth Malformations in 6 Dogs the abnormal tissue, and factors associated with development. These developmental abnormalities more closely resemble molar-incisor malformation, rather than dens invaginatus or enamel pearls as described in humans. The authors propose that affected mandibular first molar teeth simply be referred to as having carnassial tooth malformations.

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