Wyniki wyszukiwania - AGRO

1

Parameterization of the distribution of arvicolid tooth enamel

100%

Ruiz Bustos A.

Acta Zoologica Cracoviensia

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1996

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tom 39

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nr 1

2

A supernumerary maxillary tooth: its topographical anatomy and its clinical implications

100%

Das S., Suri R. K., Kapur V.

Folia Morphologica

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2004

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tom 63

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nr 4

A supernumerary tooth was detected in the left maxilla during an osteology teaching session with undergraduate medical students. Supernumerary teeth have previously been detected in individuals who have approached a dental surgeon with a complaint and who have then been diagnosed by X-ray. Asymptomatic cases are frequently not diagnosed in time and it is only the malalignment or delayed eruption of the tooth which raises the suspicion that this type of dental anomaly is present. The present paper highlights the anatomico-radiological study of a supernumerary maxillary tooth in a bone specimen and describes its clinical implications. Precise anatomical details of the supernumerary maxillary tooth might be of significant clinical interest to dental and maxillofacial surgeons in drawing up a plan for orthodontic treatment and may thus minimise the possible complications involved.

3

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The impact of toothbrush filament design on gingival health during healing. A randomized, controlled, investigator-blinded clinical trial

86%

Kovalova E., Novak B., Klamarova T., Eliasova A.

Health Problems of Civilization

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2015

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tom 09

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nr 1

Objectives. The primary objective of the study was to test toothbrushes with different types of filaments (conical vs. rounded) with respect to cause gingival abrasion after surgical intervention of wisdom teeth. A secondary objective was to evaluate the efficacy of plaque removal and the improvement of gingival conditions to alleviate wound healing and to avoid gingivitis. Methods. One hundred and seventy-three healthy subjects with surgical intervention of wisdom teeth participated in a randomized, single blind study and were randomly allocated to control group (standard ADA reference toothbrush) or test group (meridol® special toothbrush with conical filaments). Clinical examinations included gingival abrasion, plaque index and gingival index, and were conducted at baseline, 7 and 28 days. Results. For the gingival abrasion the mean number of lesions of all sizes was after 28 days significantly lower in the test group (p-value <0.001) compared to control group. Plaque index was not significantly different between the two groups in the last visit. At day 28 the gingival index was significantly lower in the test group (p=0.031) compared to control group. Conclusions. The toothbrush with conical filaments induced significantly less gingival abrasions than the standard ADA toothbrush and showed superior results in improving gingival health (gingival index). Both toothbrushes were comparable effective with respect to plaque removal. Clinical Relevance. Scientific rationale for study: Supra and sub-gingival biofilm leads to gingival inflammation. Post-surgical removal of the biofilm from gingival surfaces promotes healing after wisdom tooth extraction. Tooth brushing leads to gingival abrasion. Earlier investigations with toothbrushes having conical filaments suggest less gingival tissue damage. Principal findings: The results showed that the toothbrush with conical filaments caused significantly less gingival abrasions than the toothbrush with rounded filaments. Practical implications: Toothbrush filament design should be considered when choosing toothbrush for oral hygiene after oral surgery.

4

Influence of some factors on chromium occurrence in teeth

86%

Malara P., Kwapulinski J., Drugacz J., Orzechowska-Wylegala B.

Journal of Elementology

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2005

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tom 10

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nr 4 Suppl.1

63

5

Evolutionary radiation of the cheek teeth of Cretaceous placentals

86%

Butler P. M.

Acta Palaeontologica Polonica

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1977

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tom 22

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nr 3

Included is a comparative study of the molars and posterior premolars of the Cretaceous placentals. Particular attention is paid to occlusal relations. An attempt is made to identify primitive characters, and the advance of each genus from the primitve condition is analysed. It is found that nearly all known genera are on different lines of evolution, indicating that a major radiation of placentals was taking place during the Cretaceous.

6

Additional triangle on M2 in Microtus nivalis (Martins, 1842)

86%

Buszko S.

Acta Theriologica

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1974

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tom 19

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nr 14-25

7

Morphology and microanalysis of teeth in skleroderma

86%

Knychalska-Karwan Z., Pawlicki R., Karwan T.

Folia Histochemica et Cytobiologica

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1986

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tom 24

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nr 3

8

Late Visean pelagic chondrichthyans from northern Europe

86%

Ginter M., Duffin C. J., Dean M. T., Korn D.

Acta Palaeontologica Polonica

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2015

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tom 60

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nr 4

The relatively rich assemblages of shark teeth from pelagic limestone (Mississippian, late Viséan, late Asbian-middle Brigantian) of three northern European regions: the Rhenish Mountains (Westenfeld Quarry, Germany), the Holy Cross Mountains (Todowa Grząba at the edge of Ostrówka Quarry, Poland), and Derbyshire (Cawdor Quarry, Matlock, England, UK) display certain similarities, with the absolute predominance of the teeth of Falcatidae (small Symmoriiformes) and the constant presence of Thrinacodus spp. The largest and most diverse assemblage from Todowa Grząba contains at least three species of a falcatid Denaea, a xenacanthimorph Bransonella nebraskensis, a newly described phoebodontid Thrinacodus dziki sp. nov., a few ctenacanthiform and euselachian teeth, and two abraded euchondrocephalan dental elements. Anachronistidae, common in the most of late Viséan pelagic faunas, are absent from Todowa Grząba and Westenfeld. The material under study differs from the shallow-water chondrichthyan fauna, hitherto described from the Mississippian carbonate platform facies, by its taxonomic content (particularly almost total absence of Euchondro-cephali), generally lower diversity, and higher frequency of small teeth.

9

Influence of environmental exposure on coexistence of cadmium and zinc in teeth

86%

Malara P., Kwapulinski J., Drugacz J., Malara B.

Journal of Elementology

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2005

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tom 10

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nr 4 Suppl.1

62

10

Phytochemical screening of Justicia simplex D. Don a valuable medicinal plant extract against dental pathogens

86%

Eswari M. G., Rathi R. L., Harini J., Aruna R., Balakrishnan V.

International Letters of Natural Sciences

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2014

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tom 16

The plant Justicia simplex D.Don is traditional herb, people used it in different diseases, they treat fever and burning of the body, strengthen the lungs, the teeth and stop vomiting. The plant exhibited more promising bacterial activity against various microorganisms. Hence, in the present study this plant is also tested against the dental pathogens. The plant was extracted from four different solvents was tested for the presence of phytochemicals in it. After analyzing, its antimicrobial activity is tested against fungi and bacteria. Then a dental carrier Streptococcus aureus, Klebsiella pneumonia, Escherichia coli and Pseudomonas aeruginosa which was collected from the K.S.R. Institute for Dental Science and Research. The isolates were used to check the activity against Justicia simplex D.Don. Based on the positive result obtained against various analyses, it is formulated successfully into a tooth paste. The present study on Phytochemical screening of Justicia simplex D.Don a valuable medicinal plant extract against Dental pathogens enables the use of this plant for the formulation of tooth powder against dental pathogens. The result is more effective against dental pathogens by herbal tooth powder.

11

The influence of cigarette smoking on the occurrence of some metals in teeth

86%

Malara P., Kwapulinski J., Drugacz J.

Polish Journal of Environmental Studies

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2004

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tom 13

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nr Suppl.2, Part 1

The aim of this study was to find out if cigarette smoking influences the Cd, Cr, Cu, Fe, Mn, Pb, Zn, K, Na, Ca and Mg contents and mutual relationships between these elements in teeth. The content of elements was determined by means of atomic absorption spectrometry in the smokers' and non-smokers' teeth. It was concluded that the cigarette smoking results in the significant increase of Cd, Zn and Cu contents in teeth and that the supply of heavy metals from cigarette smoke to human organism influences the mutual relationships between the elements in a tooth structure.

12

Extra teeth and dental anomalies in the crested porcupine Hystrix cristata, from Sicily

86%

Angelici F. M., Luiselli L.

Acta Theriologica

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1999

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tom 44

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nr 2

We examined 181 skulls of crested porcupine Hystrix cristata Linnaeus, 1758 from Sicily, mainland Italy, and from several African countries. Two skulls, both from Sicily, had anomalous dentition. One skull exhibited a case of supernumerary dentition, whereas the other one showed a dental malformation with numerary teeth reduction. The type of anomaly was determined in each skull examined and some hypotheses for explaining these anomalies were presented.

13

Calculation of numerical density of enamel prisms in multituberculate enamels: A review

86%

Fosse G.

Acta Palaeontologica Polonica

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2003

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tom 48

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nr 4

In this brief review I explain the method of quantitatively describing prismatic enamel microstructure in multituberculates, to facilitate its practical use by paleontologists. I argue that histogenesis of gigantoprismatic enamel in many multituberculate taxa must have been quite exceptional in mammals. Future studies of enamel in plesiomorphic “plagiaulacidan” multituberculates are necessary to elucidate the evolutionary phases of enamel micromorphology toward prismatic mammalian enamel generally, and perhaps as a consequence, the origin of the successful (Late Cretaceous–Eocene) multituberculate suborder Cimolodonta and relationships among its subgroups. Such studies should therefore include calculation of numerical prism densities whenever possible.

14

The influence of lead on occurrence of some essential elements in teeth

86%

Malara P., Kwapulinski J., Malara B.

Acta Toxicologica

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2004

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tom 12

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nr 1

15

Loss of the third upper premolar in Suncus murinus and its relation to jaw size

86%

Natori M., Shigehara N.

Acta Theriologica

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1997

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tom 42

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nr 1

Musk shrew Suncus murinus (Linnaeus, 1766) has a very reduced P3, and it is often missing. Hanamura (1985), based on a sample from Okinawa Island, proposed that the high incidence in P3 loss was a distinguishing characteristic of musk shrew. However, while the Okinawa population lacked P3 in 26 of 95 individuals (27.4%), specimens from Taiwan showed no P3 loss. Thus, the high incidence of P3 loss is not one of distinguishing characteristic of musk shrews. In the Okinawa sample, P4-M3 length vs palatal length in the group with P3 on both sides was significantly greater than that without P3. The relationship between the P4-M3 and palatal lengths showed negative allometry (Okinawa population with P3: y = 0.18 + 0.67a:; Okinawa population without P3: y = 0.21 + 0.67x; Taiwan population: y = 0.15 + 0.68x). Taiwan population had a greater P4-M3 length relative to palatal length than did the Okinawa population because palatal length was greater in the former. These findings suggest that, as in the case of human third molars, a reduction in upper jaw size is responsible for the loss of the third molar in the Okinawa musk shrews.

16

Changes of the calcium metabolism in mineralized tissues of rats during experimental postmenopausal osteoporosis

86%

Rahnama M., Bloniarz J.

Bulletin of the Veterinary Institute in Puławy

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2004

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tom 48

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nr 4

17

Carved teeth and strange jaws: how glyptodonts masticated

86%

Farina R. A., Vizcaino S. F.

Acta Palaeontologica Polonica

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2001

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tom 46

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nr 2

In this paper, the highly peculiar masticatory apparatus of glyptodonts is studied. The general morphology of the skull is analysed using a morphometric procedure, the Resistant Fit Theta Rho Analysis, which allows comparison among different biological forms. Here, a large terminal form, the late Pleistocene genus Glyptodon, is compared with the smaller primitive Miocene genus Propalaehoplophorus, and with the generalised Recent armadillo Chaetophractus. The masticatory musculature of glyptodonts is reconstructed. Their tooth form and wear facets, as well as their mandibular symphysis and jaw joint, are analysed. A model of jaw movement is constructed based on these analyses. It is demonstrated that the masticatory apparatus of glyptodonts had undergone a telescoping process, which was already underway in the most ancient forms whose skull is known. This process created problems in regard to the way stresses produced by mastication were absorbed by the mandible, and therefore it might be regarded as non-adaptive. Some functional explanatory hypotheses are discussed, such as a requirement of keeping the moment of the weight of the cranium small enough to be counterbalanced by the neck muscles, or fitting the head into the armour.

18

Dental incremental lines in some small species of the European vespertilionid bats

86%

Batulevicius D., Pauziene N., Pauza D. H.

Acta Theriologica

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2001

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tom 46

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nr 1

The dentine and cementum of the mammals exhibit incremental lines (IL) that may be seen as dark and light rings in properly prepared sections of teeth. Counting of IL provides a potential method to evaluate the absolute age of many wild species. The aim of the present study was to evaluate IL in small bat species and to test whether the number of IL is associated with the absolute age of bat when its minimal age was known based on ringing data. Teeth of 26 specimens of the following species were examined: Myotis daubentonii (n = 12), Barbastella barbastellus (n = 4), M. brandtii (n = 2), M. nattereri (n = 2), Pipistrellus nathusii (n = 2), Plecotus auritus (n = 2), M. dasycneme (n = 1), Vespertilio murinus (n = 1). Transverse morphological sections of canines, incisors and postcanine teeth were analysed by a light microscopy. In 4 cases, the minimal age of animals examined in this study was known. The IL were revealed in the dentine of 14 bats examined. The cementum of all animals was devoid of IL. The mean distance between the first and second juxtaposed IL of M. daubentonii was 3.2 ± 0.2 ^m, but it was significantly fewer among the subsequent adjacent lines. Due to a thinness of the IL, an accurate counting was considerably difficult in the canines containing more than 10 IL, as well as in the incisors and postcanine teeth with more than 3-6 IL. The IL of roots showed the most contrast, but they were almost obscured from view at the cingulum and crown. In bats of known-age, the numbers of IL were significantly lower than minimal age of those animals examined, and IL were either revealed only in certain teeth or absent entirely in all teeth. The present findings suggest that the number of the IL varies in different teeth and is strongly dependent on section level. Consequently, age determination in small bats using dental IL is doubtful and requires a reevaluation.

19

Quasi-continuous variation of the first premolars in the Polish population of the badger Meles meles

86%

Szuma E.

Acta Theriologica

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1994

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tom 39

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nr 2

The presence-absence polymorphism and the size of P1] were studied in the Polish population of the badger Meles meles (Linnaeus, 1758} (n = 79). P1 is more often absent than Pi. The lengths of P\ range from 0.97 mm to 2.63 mm (V = 16.3-22.3). A breach in the continuous variation of the size of the teeth between their absence and the minimum length of the crown that is 0.97 mm suggests that a threshold mechanism, related to size, operates at an early stage of P'i ontogeny. Such a mechanism would allow the development of a tooth only if it had reached the threshold size at the critical stage of its ontogeny. The correlation between the presence or absence of P!i and the number of roots of P% confirms the existence of a gradient in shape ancf size within the morphogenetic field of cheek teeth. The frequent occurrence of P i in the Polish population of the badger (73%) corresponds to the clinal variation of the presence-absence polymorphism of the first premolars in Eurasia.

20

Supernumerary teeth in a captive population of American bison Bison bison

86%

Crooks K. R., Van Vuren D.

Acta Theriologica

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1994

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tom 39

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nr 3

A link between dental abnormalities and loss of genetic variation has been reported for unconfined populations of American bison Bison bison (Linnaeus, 1758) but not for captive populations. From a zoo herd with a small founder population and likely history of inbreeding, we report the first recorded occurrence of dental abnormalities in captive bison and the first case of supernumerary second premolars in bison.

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