Pharyngeal teeth and masticatory process of the basioccipital bone in Japanese bitterlings (Cyprinidae)

1985 ◽  
Vol 32 (2) ◽  
pp. 180-188 ◽  
Author(s):  
Nobuhiro Suzuki ◽  
Takashi Hibiya
Keyword(s):  
Pharyngeal Teeth ◽  
Masticatory Process ◽  
Basioccipital Bone

Parametric Optimization of Dental Implants

2020 ◽  
Vol 22 (4) ◽  
pp. 1061-1076
Author(s):  
Wafa Bensmain ◽  
Mohammed Benlebna ◽  
Boualem Serier ◽  
Bel Abbes ◽  
Bachir Bouiadjra
Keyword(s):  
Dental Implants ◽  
Clinical Success ◽  
Equivalent Stress ◽  
Radius Of Curvature ◽  
Geometrical Parameters ◽  
Neck Size ◽  
Biomechanical Behavior ◽  
Dynamic Charging ◽  
The Stability ◽  
Masticatory Process

AbstractOsseointegration is a fundamental phenomenon of dental implantology. It ensures the stability, the safety and the durability of dental implants and predictable clinical success in long-term. The geometric form of the implant is a defining parameter of osseointegration and implant-bone charge transfer. This is the essential constitutes of this study. In fact, we demonstrate using the finite elements method with tridimensional numerical computations, that the geometrical parameters of the implant conditionate the level and the repartition of the stresses, induced in the cortical bone and the spongy bone during the masticatory process, simulated here by dynamic charging. The effect of several parameters [size and conicity of the implant neck, size and radius of curvature of the implant apex] and the shape of the implant corps on the biomechanical behavior of the bone. The latest was analyzed in terms of variation of the equivalent stress induced in the bone. The purpose of this analysis was the developing of an implant form allowing stress relaxation, during the mastication process, in the living tissue.

Telomerase Expression in Medaka (Oryzias melastigma) Pharyngeal Teeth

2017 ◽  
Vol 96 (6) ◽  
pp. 678-684 ◽  
Author(s):  
W.H. Tan ◽  
P.E. Witten ◽  
C. Winkler ◽  
D.W.T. Au ◽  
A. Huysseune
Keyword(s):  
Pharyngeal Teeth ◽  
Oryzias Melastigma

scholarly journals Pharyngeal Teeth of Porgies

1959 ◽  
Vol 2 (2) ◽  
pp. 86-90 ◽  
Author(s):  
Sohiti ISOKAWA ◽  
Heiji ONUMA ◽  
Haruhiko YOSHIDA
Keyword(s):  
Pharyngeal Teeth

scholarly journals Trigeminal Neuralgia, Glossopharyngeal Neuralgia, and Myofascial Pain Dysfunction Syndrome: An Update

2017 ◽  
Vol 2017 ◽  
pp. 1-18 ◽  
Author(s):  
Mohammad Khan ◽  
Shamima Easmin Nishi ◽  
Siti Nazihahasma Hassan ◽  
Md. Asiful Islam ◽  
Siew Hua Gan
Keyword(s):  
Trigeminal Neuralgia ◽  
Myofascial Pain ◽  
Trigger Point ◽  
Treatment Options ◽  
Neck Region ◽  
Diagnostic Procedures ◽  
Glossopharyngeal Neuralgia ◽  
Myofascial Pain Dysfunction ◽  
Central Nervous Systems ◽  
Masticatory Process

Neuropathic pain is a common phenomenon that affects millions of people worldwide. Maxillofacial structures consist of various tissues that receive frequent stimulation during food digestion. The unique functions (masticatory process and facial expression) of the maxillofacial structure require the exquisite organization of both the peripheral and central nervous systems. Neuralgia is painful paroxysmal disorder of the head-neck region characterized by some commonly shared features such as the unilateral pain, transience and recurrence of attacks, and superficial and shock-like pain at a trigger point. These types of pain can be experienced after nerve injury or as a part of diseases that affect peripheral and central nerve function, or they can be psychological. Since the trigeminal and glossopharyngeal nerves innervate the oral structure, trigeminal and glossopharyngeal neuralgia are the most common syndromes following myofascial pain dysfunction syndrome. Nevertheless, misdiagnoses are common. The aim of this review is to discuss the currently available diagnostic procedures and treatment options for trigeminal neuralgia, glossopharyngeal neuralgia, and myofascial pain dysfunction syndrome.

Mice homozygous for a targeted disruption of Hoxd-3 (Hox-4.1) exhibit anterior transformations of the first and second cervical vertebrae, the atlas and the axis

Development ◽  
1993 ◽  
Vol 119 (3) ◽  
pp. 579-595 ◽  
Author(s):  
B.G. Condie ◽  
M.R. Capecchi
Keyword(s):  
Hox Genes ◽  
Es Cells ◽  
Cervical Vertebrae ◽  
Expression Patterns ◽  
Cervical Vertebra ◽  
Targeted Disruption ◽  
Paralogous Genes ◽  
Variable Extent ◽  
Basioccipital Bone

Gene targeting in embryo-derived stem (ES) cells was used to generate mice with a disruption in the homeobox-containing gene Hoxd-3 (Hox-4.1). Mice homozygous for this mutation show a radically remodeled craniocervical joint. The anterior arch of the atlas is transformed to an extension of the basioccipital bone of the skull. The lateral masses of the atlas also assume a morphology more closely resembling the exoccipitals and, to a variable extent, fuse with the exoccipitals. Formation of the second cervical vertebra, the axis, is also affected. The dens and the superior facets are deleted, and the axis shows ‘atlas-like’ characteristics. An unexpected observation is that different parts of the same vertebra are differentially affected by the loss of Hoxd-3 function. Some parts are deleted, others are homeotically transformed to more anterior structures. These observations suggest that one role of Hox genes may be to differentially control the proliferation rates of the mesenchymal condensations that give rise to the vertebral cartilages. Within the mouse Hox complex, paralogous genes not only encode very similar proteins but also often exhibit very similar expression patterns. Therefore, it has been postulated that paralogous Hox genes would perform similar roles. Surprisingly, however, no tissues or structures are affected in common by mutations in the two paralogous genes, Hoxa-3 and Hoxd-3.

scholarly journals Sinorhodeus microlepis, a new genus and species of bitterling from China (Teleostei: Cyprinidae: Acheilognathinae)

Zootaxa ◽  
2017 ◽  
Vol 4353 (1) ◽  
pp. 69 ◽  
Author(s):  
FAN LI ◽  
TE-YU LIAO ◽  
RYOICHI ARAI ◽  
LIANGJIE ZHAO
Keyword(s):  
Yangtze River ◽  
New Genus ◽  
Mitochondrial Gene ◽  
New Genus And Species ◽  
Dorsal Fin ◽  
Chongqing City ◽  
White Spots ◽  
Pharyngeal Teeth ◽  
Fin Rays ◽  
Black Blotch

A new genus and species, Sinorhodeus microlepis gen. et sp. nov., is described from a tributary of the Yangtze River, in Chongqing City, China. Sinorhodeus gen. nov. can be distinguished from four closely related genera, Paratanakia, Pseudorhodeus, Rhodeus, and Tanakia, by the following combination of characters: pharyngeal teeth 0,0,4–4,0,0, longitudinal scales 41–46, white spots on dorsal-fin rays absent, a black blotch on dorsal fin in juvenile absent, and less developed wing-like yolk sac projections in larvae. Phylogenetic analysis of one mitochondrial gene and six nuclear genes supports the establishment of the new genus. 

The capitulum and feeding mechanism of Ixodes hexagonus Leach

Parasitology ◽  
1951 ◽  
Vol 41 (1-2) ◽  
pp. 66-81 ◽  
Author(s):  
D. R. Arthur
Keyword(s):  
Lower Surface ◽  
Tissue Reaction ◽  
Lower Wall ◽  
Feeding Mechanism ◽  
External Structure ◽  
Basal Lobe ◽  
Ixodes Hexagonus ◽  
Pharyngeal Muscles ◽  
Pharyngeal Teeth

1. The external structure of the capitulum of Ixodes hexagonus is described in detail, and the differences between it and the closely allied I. cookei are noted.2. The capitulum is divisible into two portions, an extra-basis and basis regions. The former is divided into the hypostomal groove, the labrohypostomal groove and the labro-hypostomal gutter. Internally the basis is divided into dorsal and ventral chambers by the subcheliceral plate. The dorsal chamber houses the chelicerae while the pharynx and the salivary ducts occupy the ventral portion.3. The so-called ‘stylet-like process’ is the anterior prolongation from the basal lobe of the labrum, and forms the mid-rib of a lamella which divides the hypostome into a dorsal salivary channel and a ventral food conduit.4. There are rows of teeth on the internal faces of the anterior fifth of the pharynx. Two series of pharyngeal muscles are present: (i) those having a dorsal attachment to the floor of the salivary chamber, and (ii) those having similar attachments to the subcheliceral plates.5. During feeding the first incision is made by the denticulate apices of the digits and into it the hypostome is then forced. Further cutting by the digits enables the hypostome to penetrate to its base. At the same time the palps splay out. The blood is then drawn up the food conduit by the action of the sucking pharynx. The lower surface of the labrum is produced into a tooth-like projection that fits into a groove of the lower wall of the pharynx. Presumably it functions as a valve to prevent regurgitation of blood. The pharyngeal teeth may function as a supplementary valvular apparatus or else serve for the breakdown of erythrocytes.6. The tissue reaction of a stoat's skin to penetration by the capitulum of I. hexagonus is described.

Sign in / Sign up

Export Citation Format

Share Document