Dental radiology: ageing changes in permanent teeth of beagle dogs

Miyabayashi, Takayoshi

doi:10.1111/j.1748-5827.1991.tb00850.x

Cited by 16 publications

(10 citation statements)

References 16 publications

(9 reference statements)

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“…In histologic examination of beagles, the dentin wall was seen to be thicker at 6 months of age, and the pulp cavity gradually became narrower up to 9 months of age. This observations corresponded to the radiographic findings by Morgan and Miyabayashi [13].…”

Section: Discussionsupporting

confidence: 90%

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The Formation of Apical Delta of the Permanent Teeth in Dogs.

et al. 2001

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ABSTRACT. To determine the process of formation of apical delta, a histological study on the permanent teeth was carried out in dogs. A litter of 7 clinically healthy beagle dogs and 33 adult dogs (4-to 15-year-old) of 12 breeds with periodontal disease were used for the experiments. Teeth extracted from 6-,7-,8-and 9-month-old beagles were sectioned and stained with HE solution. Tooth roots obtained from adult dogs with periodontal disease were ground. Each tooth was classified into the following root types under a light microscope: Type I (no apical delta = no apical closure), II (few apical delta), IIIA (low apical delta) and IIIB (high apical delta). In the 6-monthold beagles, more than half the tooth roots were classified as type I. In the 7-month-old beagles, type IIIB apical delta was the most predominant and types I, II and IIIA apical delta were occassionally seen. Apical closure and delta were observed in all beagles at 8 months of age histologically. In the 8-and 9-month-old beagles, all root apexes observed were type IIIB. Most of the 314 tooth roots extracted from 33 adult dogs were type IIIB, but a few were type IIIA. KEY WORDS: apical delta, canine, endodontics, root apex, root canal treatment.J. Vet. Med. Sci. 63 (7): [789][790][791][792][793][794][795] 2001 The apical delta is an intricate system of cavities which allows free passage of numerous blood vessels and nerves from the pulp cavity to the root apex [2,6,10,18,21,22], and this may contribute to the formation of the apical lesions of the tooth [2,23,24].Masson et al. reported a 100% occurrence of apical delta in the roots of extracted teeth in dogs more than 1 year old [12]. Gamm et al. later reported that 69.5% of the canine teeth in 6-to 24-month-old dogs have apical delta [5]. It is not known when apical delta is formed in growing dogs, and how many teeth have this unique structure in their roots in adult dogs. The purpose of this study was to determine the formation process and variation in apical delta types in the permanent teeth of dogs. MATERIALS AND METHODS Histological studies of apical delta formation in growing beagle dogsLaboratory dogs: A litter of 7 clinically healthy beagle dogs (4 males and 3 females weighing 12-13 kg) were used for these experiments. Irrespective of right or left side, 3 teeth were extracted from the 6-to 9-month-old dogs every month to compare all tooth roots.All experiments were done according to the approved guidelines for the handling of laboratory animals at the Graduate School of Veterinary Medicine, Hokkaido University.Teeth extraction: The animals were intramuscularly injected with atropine sulfate (0.03 mg/kg) and intravenously injected with flunitrazepam (0.03 mg/kg). Ten min later the animals were injected intravenously with ketamineHCl (10 mg/kg) and intubated. General anesthesia was maintained with oxygen-isoflurane. Lidocaine containing epinephrine as a local anaesthetic agent was injected in the area of the gums surrounding the tooth root. The animals were given ampicillin-Na (20 mg/kg)...

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Section: Discussionsupporting

confidence: 90%

“…Histologic observation is essential to elucidate the apical delta formation in growing dogs, because radiographic evaluation of teeth is known to have limitations [13]. Surgical collection and histologic observation of tooth roots could not therefore be eliminated.…”

Section: Discussionmentioning

confidence: 99%

The Formation of Apical Delta of the Permanent Teeth in Dogs.

et al. 2001

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“…When looking at the rate of missing teeth by tooth type, a high frequency of first premolars were found to be missing, confirming the findings of Page and Schroeder (1981). This may result from the progression of periodontitis (Morgan and Miyabayashi 1991) or from the type of thecodontal attachment (the collagen fibre attachment supporting the teeth in the alveolar bone) (Dorn 1981, Gaengler 1986). However, a high frequency of incisors was also found to be missing in the present study, which was not the case in the Page and Schroeder (1981) study.…”

Section: Discussionsupporting

confidence: 54%

Epidemiology of periodontal disease in poodles

Hoffmann

Gaengler

1996

J of Small Animal Practice

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The periodontal condition of 123 poodles was assessed using the parameters of depth of gum pocket, attachment level, bleeding on probing, and plaque and calculus accumulation. No dogs were free of periodontal disease. The number of deep pockets and dramatic loss of attachment ranged from 0.1 teeth in young dogs to 4.2 teeth in old animals. A sixfold increase in deep pocketing took place in dogs between the ages of six and seven, followed by a twofold increase in the number of teeth missing in dogs within the 10 to 11 year age group. First premolars, incisors and second molars were at highest risk. No correlation between dietary conditions and disease incidence could be detected. It is concluded that, by concentrating their diagnostic efforts on those age groups and types of teeth at highest risk, clinicians could improve the effectiveness of their treatment interventions.

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“…All of these canid remains have been directly AMS radiocarbon dated (Table 1); all were calibrated using OxCal (v4.1) and the INTCAL09 dataset (Reimer et al, 2009). Ageing of the specimens was done through study of dental eruption patterns and epiphysis fusion (Cahill & Marks, 1982;Evans & Christensen, 1979;Kremenak, 1967;Morgan & Miyabayashi, 1991;Shebestari et al, 1967;Watson et al, 1986). The presence of bacula was used to identify a few canids as males; otherwise, no sexing was attempted.…”

Section: Eastern Siberia Archaeological Canidsmentioning

confidence: 99%

Estimating Body Mass in Dogs and Wolves Using Cranial and Mandibular Dimensions: Application to Siberian Canids

Losey

Osipov

Sivakumaran

et al. 2014

Int. J. Osteoarchaeol.

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Previously developed regression formulae for estimating body mass in dogs and wolves based on cranial and mandibular dimensions are evaluated using modern canid specimens of known weight at death. Some of these equations proved reliable, but others have large standard errors of estimate and likely produce unreliable mass estimates. New sets of equations for estimating body mass in dogs and wolves are produced using our datasets, including a set of equations developed from combining the dog and wolf biometric data into a single population. The resulting regression equations allow body mass to be estimated from a series of cranial and mandibular dimensions with relatively low errors. Further, our datasets include larger numbers of specimens of larger ranges of body mass than in these previous studies. When the equations are applied to a suite of dogs and one wolf from Eastern Siberia, several patterns emerge. First, hunter–gatherers' dogs in this region vary widely in terms of body size, even within a limited geographic area and time period. Some were quite large, similar in size to modern Siberian huskies. Second, pastoralists' dogs are less variable in terms of body mass, but this may reflect the nature of our samples. In particular, pastoralists' dogs nearly all were sacrificed juvenile dogs, some of which appear to have been eaten. These dogs seem to have been approached adult body size when they were selected for sacrifice. Finally, our findings help to highlight the need for further refinement in methods used to study ancient canid remains. Copyright © 2014 John Wiley & Sons, Ltd.

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Dental radiology: ageing changes in permanent teeth of beagle dogs

Cited by 16 publications

References 16 publications

The Formation of Apical Delta of the Permanent Teeth in Dogs.

The Formation of Apical Delta of the Permanent Teeth in Dogs.

Epidemiology of periodontal disease in poodles

Estimating Body Mass in Dogs and Wolves Using Cranial and Mandibular Dimensions: Application to Siberian Canids

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