scholarly journals The Permian reptile Opisthodontosaurus carrolli : a model for acrodont tooth replacement and dental ontogeny

2017 ◽  
Vol 232 (3) ◽  
pp. 371-382 ◽  
Author(s):  
Yara Haridy ◽  
Aaron R. H. LeBlanc ◽  
Robert R. Reisz
Keyword(s):  
Tooth Replacement ◽  
Dental Ontogeny

scholarly journals Dental ontogeny and replacement in Pliosauridae

2015 ◽  
Vol 2 (11) ◽  
pp. 150384 ◽  
Author(s):  
Judyth Sassoon ◽  
Davide Foffa ◽  
Ryan Marek
Keyword(s):  
Tooth Development ◽  
Medial Axis ◽  
Tooth Eruption ◽  
Dental Morphology ◽  
Tooth Replacement ◽  
Posterior Teeth ◽  
Anterior Teeth ◽  
Dental Ontogeny ◽  
Replacement Cycle

Dental morphology and patterns of tooth replacement in representatives of the clade Pliosauridae (Reptilia, Sauropterygia) are evaluated in detail. The jaws of one basal ( Thalassiodracon hawkinsii ) and two derived species ( Pliosaurus carpenteri , Pliosaurus kevani ) were visualized by μCT scans, and the ontogenetic patterns, or ‘movement paths’, of replacement teeth could be mapped. Other specimens ( Peloneustes philarchus and Pliosaurus westbuyensis ) with well-preserved jaws containing functional and replacement teeth in situ were also examined directly, and waves of tooth replacement could be inferred from the degree of in situ tooth development and the fusion between functional and replacement alveoli. The analysis revealed symmetrical tooth eruption over the medial axis throughout the length of the jaw in the basal pliosaurid Thalassiodracon . By contrast, symmetrical tooth eruption patterns occur only along the anterior sections of the jaws of derived pliosaurids. In Pliosaurus , replacement schedules differ in the anterior and posterior portions of the jaws and appear to correlate with differences in tooth morphology and symmetrical replacement. The anterior teeth exhibit longer replacement cycle periods and symmetrical replacement, while shorter cycle periods and asymmetry are seen posteriorly. A longer period suggests slower replacement and is characteristic of large, specialized caniniform teeth in the longer snouted Late Jurassic taxa. Smaller posterior teeth have a shorter period and therefore a faster replacement cycle. The transition from long to short replacement period over the length of the jaw is thought to account for the loss of symmetry. This differentiation could relate to differential tooth function and a type of heterodonty. We therefore propose a new model of pliosaurid tooth replacement patterns and present it in a phylogenetic context.

Functional analysis of chondroitin 4 sulfate constituting osseointegration

Impact ◽  
2019 ◽  
Vol 2019 (8) ◽  
pp. 18-20
Author(s):  
Shuhei Tsuchiya
Keyword(s):  
Functional Analysis ◽  
Extracellular Matrix ◽  
Dental Implants ◽  
Maxillofacial Surgery ◽  
The Body ◽  
Oral And Maxillofacial Surgery ◽  
Direct Connection ◽  
Tooth Replacement ◽  
Living Bone ◽  
Natural Tooth

Osseointegration can be defined as a direct connection, both structural and functional, between living bone and the surface of an artificial implant. Indeed, the word comes from the Greek term for 'bone' and 'to make whole'. In dentistry, once dental implants are placed, the body will react with osseointegration, enabling the implants to become a permanent part of the jaw. There are many benefits to this type of implant, compared with traditional tooth replacement options, not least that dental implants mimic the strength and functionality of a natural tooth. Dr Shuhei Tsuchiya is a researcher based in the Division of Oral and Maxillofacial Surgery at Nagoya University, Japan, who is interested in a range of areas, including regenerative medicine and the extracellular matrix. One of his key preoccupations, though, is shedding light on osseointegration. He and his team are working to unravel the mysteries of the mechanism.

scholarly journals Immediate anterior tooth replacement by using an esthetic fixed bridge: A case report

2020 ◽  
Vol 3 ◽  
pp. 100109
Author(s):  
Muhammad Ikbal ◽  
Acing Habibie Mude ◽  
Irfan Dammar ◽  
Nisrina Ekayani
Keyword(s):  
Case Report ◽  
Anterior Tooth ◽  
Tooth Replacement

Immediate functional loading of implants in single tooth replacement: a prospective clinical multicenter study

2008 ◽  
Vol 19 (8) ◽  
pp. 740-748 ◽  
Author(s):  
Mauro Donati ◽  
Vincenzo La Scala ◽  
Mauro Billi ◽  
Biagio Di Dino ◽  
Paolo Torrisi ◽  
...  
Keyword(s):  
Multicenter Study ◽  
Tooth Replacement ◽  
Single Tooth ◽  
Functional Loading

CEMENTAL DEPOSITION AS AN AGE CRITERION IN BISON, AND THE RELATION OF INCISOR WEAR, EYE-LENS WEIGHT, AND DRESSED BISON CARCASS WEIGHT TO AGE

1965 ◽  
Vol 43 (1) ◽  
pp. 173-178 ◽  
Author(s):  
N. S. Novakowski
Keyword(s):  
Aging Process ◽  
Annual Growth ◽  
Carcass Weight ◽  
Chronological Age ◽  
Eye Lens ◽  
Tooth Replacement ◽  
Northern Latitudes ◽  
Growth And Aging

The relation of cemental deposition, incisor wear, eye-lens weight, and dressed carcass weight to age in bison was investigated in an attempt to define this relation on the basis of annual increments. It was expected that the bison, particularly in northern latitudes, would be subject to a cyclic or annual growth and aging process which would be reflected in an analysis of the above criteria. It was found that cemental deposition occurred in the premolars and molars beyond age 4 1/2 and that this deposition appeared in the form of alternating layers of translucent and opaque cementum, each set combined to form one annual band. Incisor wear provided a further check on this technique. It was found that eye-lens weight and dressed carcass weight were not reliable indicators of chronological age, particularly beyond 4 1/2 years of age when tooth replacement could not be used to define the limits of variability found in eye-lens weights and dressed carcass weights.

Rate of Tooth Replacement in the Nurse Shark, Ginglymostoma cirratum

Copeia ◽  
1990 ◽  
Vol 1990 (1) ◽  
pp. 182 ◽  
Author(s):  
Carl A. Luer ◽  
Patricia C. Blum ◽  
Perry W. Gilbert
Keyword(s):  
Tooth Replacement ◽  
Nurse Shark ◽  
Ginglymostoma Cirratum

scholarly journals Single-tooth replacement: factors affecting different prosthetic treatment modalities

2011 ◽  
Vol 11 (1) ◽  
Author(s):  
Firas A Al-Quran ◽  
Raed F Al-Ghalayini ◽  
Bashar N Al-Zu'bi
Keyword(s):  
Treatment Modalities ◽  
Tooth Replacement ◽  
Factors Affecting ◽  
Single Tooth

Tooth replacement in the bowfin (Amia calva ? Holostei)

1973 ◽  
Vol 140 (4) ◽  
pp. 381-395 ◽  
Author(s):  
William A. Miller ◽  
Carolyn J. P. Radnor
Keyword(s):  
Tooth Replacement ◽  
Amia Calva

Cranial and dental morphology in a bohaiornithid enantiornithine with information on its tooth replacement pattern

2021 ◽  
pp. 105021
Author(s):  
Di Liu ◽  
L.M. Chiappe ◽  
Becky Wu ◽  
Qingjin Meng ◽  
Yuguang Zhang ◽  
...  
Keyword(s):  
Dental Morphology ◽  
Tooth Replacement ◽  
Replacement Pattern

Cassiavellia galtarae, new species, new genus: a new Permian bivalve and its significance for pterioidean systematics

2010 ◽  
Vol 84 (6) ◽  
pp. 1152-1176 ◽  
Author(s):  
Ilya Tëmkin ◽  
John Pojeta
Keyword(s):  
New Species ◽  
New Genus ◽  
Larval Shell ◽  
Upper Permian ◽  
Taxonomic Significance ◽  
New Genus And Species ◽  
The Family ◽  
Dental Ontogeny

An exceptionally well-preserved silicified bivalve from the Upper Permian of Texas is described and assigned to a new genus and species,Cassiavellia galtarae, placed in the family Bakevelliidae. The species represents one of the earliest and best characterized unequivocal occurrences of the multivincular ligament in the superfamily Pterioidea. The silicified material provides a wealth of information on the morphology of inadequately known Paleozoic pterioideans, including hitherto undescribed aspects of the larval shell, auricular sulcus, muscle scars, and dental ontogeny. The discovery of the condyle-fossa complex on the anteroventral shell margin, a feature previously undescibed in Bivalvia, raises the question of the homology and taxonomic significance of the problematic subumbonal ridge-like structures in Pterioidea. In life,C. galtaraewas probably an epifaunal right-pleurothetic bivalve, byssally attached to hard or raised flexible substrata. In addition toC. galtarae, another new species,C. nadkevnae, is placed inCassiavellia.

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