Movement analysis of primate molar teeth under load using synchrotron X-ray microtomography

Bemmann, Maximilian; Schulz‐Kornas, Ellen; Hammel, Jörg U.; Hipp, Alexander; Herrel, Anthony; Rack, Alexander; Radespiel, Ute; Zimmermann, Elke; Kaiser, Thomas M.; Kupczik, Kornelius

doi:10.1016/j.jsb.2020.107658

Cited by 9 publications

(7 citation statements)

References 72 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Either a flexible tooth embedment in radular membrane allows the spreading of teeth to the sides 37,41,53,54 and/or a softer cushioning beneath the membrane, the odontophoral cartilages, allows the swerving in dorsal direction when teeth hit larger asperities 4,6,37,[55][56][57][58] . Similar mechanisms have been observed for the anchorage of mammalian teeth 59,60 .…”

Section: Discussionsupporting

confidence: 77%

Feeding experiments on Vittina turrita (Mollusca, Gastropoda, Neritidae) reveal tooth contact areas and bent radular shape during foraging

Krings

Hempel

SIEMERS

et al. 2021

Sci Rep

View full text Add to dashboard Cite

The radula is the food gathering and processing structure and one important autapomorphy of the Mollusca. It is composed of a chitinous membrane with small, embedded teeth representing the interface between the organism and its ingesta. In the past, various approaches aimed at connecting the tooth morphologies, which can be highly distinct even within single radulae, to their functionality. However, conclusions from the literature were mainly drawn from analyzing mounted radulae, even though the configuration of the radula during foraging is not necessarily the same as in mounted specimens. Thus, the truly interacting radular parts and teeth, including 3D architecture of this complex structure during foraging were not previously determined. Here we present an experimental approach on individuals of Vittina turrita (Neritidae, Gastropoda), which were fed with algae paste attached to different sandpaper types. By comparing these radulae to radulae from control group, sandpaper-induced tooth wear patterns were identified and both area and volume loss could be quantified. In addition to the exact contact area of each tooth, conclusions about the 3D position of teeth and radular bending during feeding motion could be drawn. Furthermore, hypotheses about specific tooth functions could be put forward. These feeding experiments under controlled conditions were introduced for stylommatophoran gastropods with isodont radulae and are now applied to heterodont and complex radulae, which may provide a good basis for future studies on radula functional morphology.

show abstract

Section: Discussionsupporting

confidence: 77%

Feeding experiments on Vittina turrita (Mollusca, Gastropoda, Neritidae) reveal tooth contact areas and bent radular shape during foraging

Krings

Hempel

SIEMERS

et al. 2021

Sci Rep

View full text Add to dashboard Cite

show abstract

“…The buccal mass muscles serve as a shock absorber or cushion element, when teeth interact with an obstacle, which can also be observed in the binocular microscope when manipulating the specimens' buccal mass muscle. This mechanism is similar to the anchorage in mammalian teeth [96,97]. The adjustable radular membrane that is made of stiffer, not extensible material keeps the teeth in place, but simultaneously allows a sliding of teeth into place and adjustment of teeth to all kinds of target surface, when the buccal mass muscles are manipulated.…”

Section: Function Of Radular Partsmentioning

confidence: 96%

From the knitting shop: the first physical and dynamic model of the taenioglossan radula (Mollusca: Gastropoda) aids in unravelling functional principles of the radular morphology

Krings

Karabacak

Gorb

2021

J. R. Soc. Interface.

View full text Add to dashboard Cite

The radula is the structure used for food processing in Mollusca. It can consist of a membrane with stiffer teeth, which is, together with alary processus, muscles and odontophoral cartilages, part of the buccal mass. In malacology, it is common practice to infer potential tooth functions from morphology. Thus, past approaches to explain functional principles are mainly hypothesis driven. Therefore, there is an urgent need for a workflow testing hypotheses on the function of teeth and buccal mass components and interaction of structures, which can contribute to understanding the structure as a whole. Here, in a non-conventional approach, we introduce a physical and dynamic radular model, based on morphological data of Spekia zonata (Gastropoda, Paludomidae). Structures were documented, computer-modelled, three-dimensional-printed and assembled to gather a simplistic but realistic physical and dynamic radular model. Such a bioinspired design enabled studying of radular kinematics and interaction of parts when underlain supporting structures were manipulated in a similar manner as could result from muscle contractions. The presented work is a first step to provide a constructional manual, paving the way for even more realistic physical radular models, which could be used for understanding radular functional morphology and for the development of novel gripping devices.

show abstract

“…Our findings suggest that diet explains relatively little of the variation seen in TRSA for most lineages. The space between the root and alveolar volumes may better reflect dietary signals, as the thickness and distribution of the periodontal ligament play important roles in preventing the tooth from crushing into the alveolar bone (Bemmann et al, 2021). A thicker periodontal ligament and, therefore, larger distance between root and alveolus, could potentially resist higher‐magnitude forces, better cushioning the tooth and resisting displacement.…”

Section: Discussionmentioning

confidence: 99%

Primate body mass and dietary correlates of tooth root surface area

Deutsch

Dickinson

Whichard

et al. 2021

American Journal of Biological Anthropology

Self Cite

View full text Add to dashboard Cite

Objectives: This study aims to examine primate postcanine tooth root surface area (TRSA) in the context of two ecological variables (diet and bite force). We also assess scaling relationships within distinct taxonomic groups and across the order as a whole.Materials and Methods: Mandibular postcanine TRSA was measured using a threedimensional computed tomography (CT) method for catarrhine (N = 27), platyrrhine (N = 21), and strepsirrhine (N = 24) taxa; this represents the first sample of strepsirrhines. Two different body size proxies were used: cranial geometric mean (GM) using nine linear measurements, and literature-derived body mass (BM).Results: TRSA correlated strongly with body size, scaling with positive allometry or isometry across the order as a whole; however, scaling differed significantly between taxa for some teeth. Among Strepsirrhini, molar TRSA relative to GM differed significantly between folivores and pliant-object feeders. Additionally, P 4 TRSA relative to BM differentiated folivores from both hard-and pliant-object feeders. Among Cercopithecoidea, P 4 TRSA adjusted by GM differed between hard-and pliant-object feeders. Discussion: Dietary signals in TRSA appear primarily driven by high frequency loading experienced by folivores. Stronger and more frequent dietary signals were observed within Strepsirrhini relative to Haplorhini. This may reflect the constraints of orthognathism within the latter, constraining the adaptability of their postcanine teeth.Finally, because of the strong correlation between TRSA and BM for each tooth locus (mean r 2 = 0.82), TRSA can be used to predict BM in fossil primates using provided equations.

show abstract

Movement analysis of primate molar teeth under load using synchrotron X-ray microtomography

Cited by 9 publications

References 72 publications

Feeding experiments on Vittina turrita (Mollusca, Gastropoda, Neritidae) reveal tooth contact areas and bent radular shape during foraging

Feeding experiments on Vittina turrita (Mollusca, Gastropoda, Neritidae) reveal tooth contact areas and bent radular shape during foraging

From the knitting shop: the first physical and dynamic model of the taenioglossan radula (Mollusca: Gastropoda) aids in unravelling functional principles of the radular morphology

Primate body mass and dietary correlates of tooth root surface area

Contact Info

Product

Resources

About