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Articoli di riviste sul tema "Jaws Muscles"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 21 febbraio 2023

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1

Fransen, J. A. M., K. V. Kardong, and P. Dullemeijer. "Feeding Mechanism in the Rattlesnake Crotalus durissus." Amphibia-Reptilia 7, no. 3 (1986): 271–302. http://dx.doi.org/10.1163/156853886x00055.

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AbstractCineradiography and electromyography were used to study the strike and swallowing behaviour of the rattlesnake, Crotalus durissus. From the data gathered, we describe the kinetic events of the cranial bones correlated with both the activity of individual jaw muscles (electromyograms) and with the calculated relative forces produced by these same muscles. During the strike, the independently suspended jaws of left and right sides simultaneously protract to erect the folded fangs. This is accompanied by opening of the lower jaws. Some low level activity first appears in the depressor mus

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2

Wilga, C. D., and P. J. Motta. "Feeding mechanism of the atlantic guitarfish rhinobatos lentiginosus:modulation of kinematic and motor activity." Journal of Experimental Biology 201, no. 23 (December 1, 1998): 3167–83. http://dx.doi.org/10.1242/jeb.201.23.3167.

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The kinematics and muscle activity pattern of the head and jaws during feeding in the Atlantic guitarfish Rhinobatos lentiginosus are described and quantified using high-speed video and electromyography to test hypotheses regarding the conservation and modulation of the feeding mechanism. Prey is captured by the guitarfish using suction. Suction capture, bite manipulation and suction transport behaviors in the guitarfish are similar to one another in the relative sequence of kinematic and motor activity, but can be distinguished from one another by variation in absolute muscle activation time,

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3

Friel, J. P., and P. C. Wainwright. "Evolution of complexity in motor patterns and jaw musculature of tetraodontiform fishes." Journal of Experimental Biology 202, no. 7 (April 1, 1999): 867–80. http://dx.doi.org/10.1242/jeb.202.7.867.

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The prey-processing behavior and jaw-adducting musculature of tetraodontiform fishes provide a novel system for studying the evolution of muscles and their function. The history of this clade has involved a pattern of repeated ‘duplications’ of jaw muscles by physical subdivision of pre-existing muscles. As a result, the number of adductor mandibulae muscles in different taxa varies from as few as two to as many as eight. We used electromyography (EMG) to quantify motor-pattern variation of adductor mandibulae muscles in four tetraodontiform species during feeding events on prey items that var

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4

Previatto, DM, and SR Posso. "Jaw musculature of Cyclarhis gujanensis (Aves: Vireonidae)." Brazilian Journal of Biology 75, no. 3 (September 25, 2015): 655–61. http://dx.doi.org/10.1590/1519-6984.20113.

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AbstractCyclarhis gujanensis is a little bird which feeds on high number of large preys, such frogs, lizards, snakes, bats and birds. As there are few studies on the cranial anatomy of this species, we aimed to describe the cranial myology to contribute to the anatomical knowledge of this species and to make some assumptions about functional anatomy. Thus, we described the muscles from the jaw apparatus (external and internal adductor muscles, the muscles of the pterygoid system and the depressor muscles of the mandible). The adductor system is the greatest and multipinulated, particularly in

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5

Patil, Santosh R., G. Maragathavalli, and DNSV Ramesh. "Bite Force: A Contemporary Narrative Review." International Journal of Health Sciences and Research 12, no. 5 (May 10, 2022): 108–16. http://dx.doi.org/10.52403/ijhsr.20220514.

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Bite force is one of the indicators of the masticatory apparatus's functioning status, as determined by the activation of the jaw's elevator muscles as a result of craniomandibular biomechanics. Bite force is used to investigate the activity related to the dentition, occlusal factor, dentures and implant therapy, temporomandibular diseases, orthognathic surgery, and neuromuscular modifications. Masticatory functions are determined by muscular forces and the total number of functioning teeth. The goal of calculating maximal biting force is to assess the force generated by the mandible's elevato

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6

Hollowell, D. E., and P. M. Suratt. "Mandible position and activation of submental and masseter muscles during sleep." Journal of Applied Physiology 71, no. 6 (December 1, 1991): 2267–73. http://dx.doi.org/10.1152/jappl.1991.71.6.2267.

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Movement of the mandible could influence pharyngeal airway caliber because the mandible is attached to the tongue and to muscles that insert on the hyoid bone. In normal subjects and patients with obstructive sleep apnea (OSA) we measured jaw position during sleep with strain gauges, as well as masseter and submental electromyograms, airflow, esophageal pressure, oximetry, electroencephalograms, and electrooculograms. Jaws of patients with OSA were open more than those of normal subjects at end expiration and opened further at end inspiration, particularly at the termination of apneas when the

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7

Gn, Suma, and Adrita Nag. "Management of Oromandibular Dystonia: A Case Report and Literature Update." Case Reports in Dentistry 2017 (2017): 1–7. http://dx.doi.org/10.1155/2017/3514393.

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Oromandibular dystonia (OMD) is a movement disorder characterized by involuntary, paroxysmal, and patterned muscle contractions of varying severity resulting in sustained spasms of masticatory muscles, affecting the jaws, tongue, face, and pharynx. It is most commonly idiopathic or medication-induced, but peripheral trauma sometimes precedes the condition. We present a case report of a 26-year-old female patient who suffered repetitive bouts of hemifacial muscle contractions for 2 years on closing the mouth which interfered in patient’s well-being and quality of life by hampering her ability t

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8

Greaves, Walter Stalker. "Modeling the distance between the molar tooth rows in mammals." Canadian Journal of Zoology 80, no. 2 (February 1, 2002): 388–93. http://dx.doi.org/10.1139/z02-008.

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The sum of all possible bite forces along a mammalian tooth row is related to the area under the curve when bite force is plotted from one end of the tooth row to the other. Integrating the equation of this plot and dividing by the length of the entire jaw, from joint to incisor, gives the average bite force along the entire jaw (as opposed to along the tooth row). Calculations indicate that for any jaw shape there is only one location for the tooth row relative to the midline of the skull, where the average bite force is maximized; the average force is lower when the tooth row is closer to, o

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9

Wainwright, P. C., and R. G. Turingan. "COUPLED VERSUS UNCOUPLED FUNCTIONAL SYSTEMS: MOTOR PLASTICITY IN THE QUEEN TRIGGERFISH BALISTES VETULA." Journal of Experimental Biology 180, no. 1 (July 1, 1993): 209–27. http://dx.doi.org/10.1242/jeb.180.1.209.

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Teleost fishes typically capture prey with the oral jaws and perform most types of prey- processing behavior with the pharyngeal jaw apparatus. In these fishes, the motor patterns associated with the different stages of feeding are quite distinct, and fish can modify muscle activity patterns when feeding on different prey. We examined motor pattern variation in the queen triggerfish, Balistes vetula, a versatile predator that both captures and processes prey with its oral jaws. During feeding on three prey that differed in hardness and elusiveness, three distinct patterns of behavior could be

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10

Huby, Alessia, Aurélien Lowie, Anthony Herrel, Régis Vigouroux, Bruno Frédérich, Xavier Raick, Gregório Kurchevski, Alexandre Lima Godinho, and Eric Parmentier. "Functional diversity in biters: the evolutionary morphology of the oral jaw system in pacus, piranhas and relatives (Teleostei: Serrasalmidae)." Biological Journal of the Linnean Society 127, no. 4 (May 8, 2019): 722–41. http://dx.doi.org/10.1093/biolinnean/blz048.

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Abstract Serrasalmid fishes form a highly specialized group of biters that show a large trophic diversity, ranging from pacus able to crush seeds to piranhas capable of cutting flesh. Their oral jaw system has been hypothesized to be forceful, but variation in bite performance and morphology with respect to diet has not previously been investigated. We tested whether herbivorous species have higher bite forces, larger jaw muscles and more robust jaws than carnivorous species. We measured in vivo and theoretical bite forces in 27 serrasalmid species. We compared the size of the adductor mandibu

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11

Nguyen, Allyn, Jordan P. Balaban, Emanuel Azizi, Robert J. Talmadge, and A. Kristopher Lappin. "Fatigue resistant jaw muscles facilitate long-lasting courtship behaviour in the southern alligator lizard ( Elgaria multicarinata )." Proceedings of the Royal Society B: Biological Sciences 287, no. 1935 (September 23, 2020): 20201578. http://dx.doi.org/10.1098/rspb.2020.1578.

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The southern alligator lizard ( Elgaria multicarinata ) exhibits a courtship behaviour during which the male firmly grips the female's head in his jaws for many hours at a time. This extreme behaviour counters the conventional wisdom that reptilian muscle is incapable of powering high-endurance behaviours. We conducted in situ experiments in which the jaw-adductor muscles of lizards were stimulated directly while bite force was measured simultaneously. Fatigue tests were performed by stimulating the muscles with a series of tetanic trains. Our results show that a substantial sustained force gr

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12

Smaglyuk, Lyubov V., and Anastasiia V. Liakhovska. "EMG-CHARACTERISTIC OF MASTICATORY MUSCLES IN PATIENTS WITH CLASS II MALOCCLUSION AND TEMPOROMANDIBULAR DISORDERS." Wiadomości Lekarskie 72, no. 5 (2019): 1043–47. http://dx.doi.org/10.36740/wlek201905217.

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Introduction: A stable state of musculoskeletal system is provided by harmony of occlusion, the anatomy of temporomandibular joints, and the activity of the masticatory muscles under the control of peripheral and central nervous system. Surface electromyography (EMG) is a well-used modality and is used in dentistry to access the status of the muscles of mastication. The aim of the research was to evaluate the EMG-characteristic of masticatory muscles in patients with TMD and Angle Class II malocclusion. Materials and methods: The study comprised 23 patients with Angle Class II malocclusion and

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13

Wilga, C. D., and P. J. Motta. "Durophagy in sharks: feeding mechanics of the hammerhead Sphyrna tiburo." Journal of Experimental Biology 203, no. 18 (September 15, 2000): 2781–96. http://dx.doi.org/10.1242/jeb.203.18.2781.

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This study investigates the motor pattern and head movements during feeding of a durophagus shark, the bonnethead Sphyrna tiburo, using electromyography and simultaneous high-speed video. Sphyrna tiburo feeds almost exclusively on hard-shelled crabs, with shrimp and fish taken occasionally. It captures crabs by ram feeding, then processes or reduces the prey by crushing it between molariform teeth, finally transporting the prey by suction for swallowing. The prey-crushing mechanism is distinct from that of ram or bite capture and suction transport. This crushing mechanism is accomplished by al

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14

Sørensen, Martin V., Seth Tyler, Matthew D. Hooge, and Peter Funch. "Organization of pharyngeal hard parts and musculature in Gnathostomula armata (Gnathostomulida: Gnathostomulidae)." Canadian Journal of Zoology 81, no. 9 (September 1, 2003): 1463–70. http://dx.doi.org/10.1139/z03-135.

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The pharynx of Gnathostomula armata, like that of other members of the phylum Gnathostomulida, consists of a set of jaws, a basal plate, and a muscular bulb that encloses these cuticularized hard parts. Field-emission scanning electron microscopy (SEM) provides additional information about the hard parts and shows that the dentition of the jaws is arranged in three rows: 710 teeth in a dorsal row, 1620 teeth in a medial row, and 20 teeth in a ventral row, a pattern different from that reported from light microscopy (LM). SEM also shows that the dentition of the basal plate is more like that

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15

Negrea, Doina, Andrea Deaconescu, and Tudor Deaconescu. "Actuation by Pneumatic Muscles of a Parallel Asymmetric Gripper System." Applied Mechanics and Materials 548-549 (April 2014): 943–47. http://dx.doi.org/10.4028/www.scientific.net/amm.548-549.943.

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Deployment of pneumatic muscles for the actuation of gripper systems is a solution with numerous benefits, related mostly to the developed force, structural rigidity, compliance and dexterity. The paper discusses a gripper variant with parallel jaws, actuated by a pneumatic muscle. The structure of the mechanism is presented, and the transmission functions of speeds and forces are determined. Due to its construction, the gripper system can be used for precision applications, similar to natural systems.

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Negrea, Doina, Tudor Deaconescu, and Andrea Deaconescu. "Symmetrical Pneumatic Muscle Actuated Gripper System with Two Mobile Jaws." Applied Mechanics and Materials 541-542 (March 2014): 852–56. http://dx.doi.org/10.4028/www.scientific.net/amm.541-542.852.

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The paper argues the possibility of utilising artificial muscles actuated with compressed air in the construction of industrial gripper systems. Their utilisation as motors comes as a response to the increasingly sophisticated requirements these have to satisfy, related to the developed force, structural rigidity, compliance and dexterity. The paper presents a variant of symmetrical gripper system with two mobile jaws actuated by a pneumatic muscle. The main requirements for this gripper are defined, the structure of the mechanism is presented and the transmission functions of forces and veloc

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17

Winkless, Laurie. "Give us a smile! Artificial muscles for robotic jaws." Materials Today 19, no. 4 (May 2016): 188. http://dx.doi.org/10.1016/j.mattod.2016.03.008.

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18

Woźniak, Krzysztof, Mariusz Lipski, Damian Lichota, and Liliana Szyszka-Sommerfeld. "Muscle Fatigue in the Temporal and Masseter Muscles in Patients with Temporomandibular Dysfunction." BioMed Research International 2015 (2015): 1–6. http://dx.doi.org/10.1155/2015/269734.

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The aim of this study is to evaluate muscle fatigue in the temporal and masseter muscles in patients with temporomandibular dysfunction (TMD). Two hundred volunteers aged 19.3 to 27.8 years (mean 21.50, SD 0.97) participated in this study. Electromyographical (EMG) recordings were performed using a DAB-Bluetooth Instrument (Zebris Medical GmbH, Germany). Muscle fatigue was evaluated on the basis of a maximum effort test. The test was performed during a 10-second maximum isometric contraction (MVC) of the jaws. An analysis of changes in the mean power frequency of the two pairs of temporal and

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19

ELLERS, OLAF, and MALCOLM TELFORD. "Forces Generated by the Jaws of Clypeasteroids (Echinodermata: Echinoidea)." Journal of Experimental Biology 155, no. 1 (January 1, 1991): 585–603. http://dx.doi.org/10.1242/jeb.155.1.585.

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Aristotle' lantern acts like a five-toothed ‘vice grip.’ Contraction of the interpyramidal muscles creates tangential stresses that are converted to radial forces along the teeth. Two mechanical models are proposed to explain this conversion. In the first, the lantern is regarded as a thick-walled cylinder resisting internal pressure; in the second, it is treated as a cluster of wedges. The two models differ primarily in the allowance of radial forces within the muscle in the cylinder and their exclusion in the wedge model. Maximum muscle stress required for a given force along the teeth depen

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20

Nikitin, Vladislav Nikolaevich, and Natalia Leonidovna Bushueva. "DISTRIBUTION OF THE EFFORTS OF THE MUSCLE MUSCLES HUMAN DENTAL SYSTEM AT ASYMMETRIC TONE SURFACE MASKING MUSCLES." SOFT MEASUREMENTS AND COMPUTING 1, no. 4 (2021): 19–24. http://dx.doi.org/10.36871/2618-9976.2021.04.003.

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The dentofacial system is closely related to the musculoskeletal, digestive, nervous, cardiovascular systems, etc. The functioning of the dentofacial system affects nutrition, breathing, swallowing, speech, hearing, etc., where occlusion is one of its main parameters. Many pathologies in the dentofacial system are also associated with a change in the efforts of the masticatory muscles, where hypertonicity of the superficial masticatory muscle is most common. The article considers an example of her hypertonicity by biomechanical modelling. For this, the problem of determining of the masticatory

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21

Okino, Akihisa, Hideaki Takanobu, Atsuo Takanishi, Kayoko Ohtsuki, Masatoshi Ohnishi, and Masayuki Yoshida. "A Clinical Jaw Movement Training Robot for Mouth Opening/Closing and Lateral Movement Training." Journal of Robotics and Mechatronics 16, no. 6 (December 20, 2004): 579–86. http://dx.doi.org/10.20965/jrm.2004.p0579.

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This paper discusses a jaw movement training robot implementing a 6-DOF (degrees of freedom) parallel mechanism, and its application to mouth opening and closing and lateral movement training. Temporomandibular joints (TMJ) syndrome prevents patients from opening their mouths or moving their jaws easily due to problems with mandibular joints, mastication muscles, and other organs involved in food chewing. Conventional therapy involves simple mouth opening apparatuses, although individual techniques vary with the physician. We developed and improved a jaw movement training robot that aids jaw o

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Kear, Amanda J. "Morphology and function of the mandibular muscles in some coleoid cephalopods." Journal of the Marine Biological Association of the United Kingdom 74, no. 4 (November 1994): 801–22. http://dx.doi.org/10.1017/s0025315400090068.

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The functional morphology of the buccal mass of 23 species of cephalopod (Octopoda, 4 species; Teuthoidea, 17; Sepioidea, 2) was investigated by gross dissection, histology and observations on fresh preparations. Cephalopod beaks lack a joint or articulation point. The jaws slide and rotate around an area rather than a fixed point. During closing the superior mandibular muscle (SMM) provides the force of a bite and the largest movement vector, whilst the inferior mandibular muscle (IMM) acts to retract the upper beak, causing shearing action. Dorsal portions of the lateral mandibular muscles (

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23

Decusară, Mioara, Cerasella Dorina Şincar, Magdalena Rusu, Alexandru Mircea Nicolau, Gabriel Valeriu Popa, and Laurenţiu Drăguş. "Orthodontic treatment for closing diastemas mandibular space to adult patient – clinical case." Romanian Journal of Stomatology 62, no. 1 (March 31, 2016): 43–47. http://dx.doi.org/10.37897/rjs.2016.1.9.

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Abstract (sommario):

Maxillary functions (chewing, swallowing, speech, phonation, breathing and gestures) are ensured by automatic and rhythmic movements of jaws, facial muscles, lips and tongue. Functional disorders can cause malocclusions or may contribute to worsening of malocclusions to other reasons.

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Zalavina, S. V., and Е. Yu Apraksina. "INFLUENCE OF INDUSTRIAL VIBRATION ON MINERAL METABOLISM, ORGANS OF THE ORAL CAVITY AND FETAL MYOCARDIUM." Sibirskij medicinskij vestnik, no. 1 (2021): 22–28. http://dx.doi.org/10.31549/2541-8289-2021-1-22-28.

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In the study, the morphometric analysis of bone trabeculae of the developing jaws, tooth buds, tongue muscles, masseter muscle, and myocardium of 20-day fetuses of Wistar rats, exposed to vibration from the 9th to the 18th day of prenatal ontogenesis, was performed. The concentration of Ca, Cd, Cu, Fe, Mg, P, Pb, Se, Zn was determined in the liver of pregnant females exposed to vibration. The morphometric study revealed an acceleration of the osteogenesis of jaws and dentinogenesis of tooth buds. In the myocardium and masseter muscle signs of interstitial edema and a decrease in the area of th

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Pankratova, Nataliia, Mikhail Postnikov, Aziza Khasbolatova, Tatiana Repina, Anastasiia Rodionova, Elizaveta Postnikova, Maxim Kirilin, and Dmitry Domenyuk. "DEVIATIONSIN THE POSITION OFTHETHIRD MOLARS." Archiv Euromedica 10, no. 4 (December 17, 2020): 156–62. http://dx.doi.org/10.35630/2199-885x/2020/10/4.35.

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Timely teething is one of the most important indicators of the harmonious development of the dentoalveolar system, which is determined by the correct (physiological) position of the teeth in the dentition, ensuring the optimal shape and function of the temporomandibular joint, the work of the chewing muscles, the height of the lower part of the face, and aesthetics of a smile. Retention of individual teeth is often the reason for the formation of anomalies in the dentition, their closure, functional and aesthetic disorders. An urgent problem in modern dentistry is the problem associated with t

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Popov, N. M. "Prolonged contracture of the chewing muscles." Neurology Bulletin VII, no. 2 (November 25, 2020): 181–209. http://dx.doi.org/10.17816/nb51115.

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Among the numerous symptoms, which are expressed by the functional and organic lesions of the nervous system, contracture of the masticatory muscles, trismus, occupies far from the last place, arising under the influence of very different conditions. Most often, it develops on the basis of general neuroses and in such a case it differs for the most part in a transient character. Quite often, we can also observe the reflex origin of this contracture, especially with irritation of the sensitive nerves of the trigeminal nerve; known ex. cases when a minor dental operation in nervous subjects had

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Gronenberg, W. "The trap-jaw mechanism in the dacetine ants Daceton armigerum and Strumigenys sp." Journal of Experimental Biology 199, no. 9 (September 1, 1996): 2021–33. http://dx.doi.org/10.1242/jeb.199.9.2021.

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Ants of three different subfamilies, among them the tribe Dacetini, have evolved very fast snapping mandibles called trap-jaws. The two dacetine genera examined, the large Daceton and the small Strumigenys, employ the same mechanism for their mandible strike. Video analysis reveals that, in Strumigenys sp., the strike takes less than 2.5 ms. It is released within 5 ms by contact of trigger hairs on the labrum. The ants employ a catapult mechanism to generate such a fast movement. Before the strike, the mandibles are opened wide and locked in the open position by the labrum, which functions as

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Hiiemae, Karen M., and Jeffrey B. Palmer. "Tongue Movements in Feeding and Speech." Critical Reviews in Oral Biology & Medicine 14, no. 6 (November 2003): 413–29. http://dx.doi.org/10.1177/154411130301400604.

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The position of the tongue relative to the upper and lower jaws is regulated in part by the position of the hyoid bone, which, with the anterior and posterior suprahyoid muscles, controls the angulation and length of the floor of the mouth on which the tongue body ‘rides’. The instantaneous shape of the tongue is controlled by the ‘extrinsic muscles’ acting in concert with the ‘intrinsic’ muscles. Recent anatomical research in non-human mammals has shown that the intrinsic muscles can best be regarded as a ‘laminated segmental system’ with tightly packed layers of the ‘transverse’, ‘longitudin

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Thribhuvanan, Dr Lakshmi, Dr M. S. Saravankumar, and Dr Anjana G. "A Short Update of Frankel Functional Regulator." ENVIRO Dental Journal 3, no. 1 (June 30, 2021): 06–12. http://dx.doi.org/10.12944/edj.03.01.03.

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A removable appliance is a device that modifies mandibular posture and transmits the resultant forces created by muscles and soft tissues to underlying and surrounding anatomical structures in a controlled manner. The resulting variation of the neuromuscular environment thus produces the required tooth movement along with the needed advancements in growing patterns. The necessity and requirement of early treatment is to modify the existing and developing malocclusions and muscular derangements before the attainment of growth completion of permanent dentition. Frankel Function Regulator (FR) is

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Kahn, Sandra, Paul Ehrlich, Marcus Feldman, Robert Sapolsky, and Simon Wong. "The Jaw Epidemic: Recognition, Origins, Cures, and Prevention." BioScience 70, no. 9 (July 22, 2020): 759–71. http://dx.doi.org/10.1093/biosci/biaa073.

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Abstract Contemporary humans are living very different lives from those of their ancestors, and some of the changes have had serious consequences for health. Multiple chronic “diseases of civilization,” such as cardiovascular problems, cancers, ADHD, and dementias are prevalent, increasing morbidity rates. Stress, including the disruption of traditional sleep patterns by modern lifestyles, plays a prominent role in the etiology of these diseases, including obstructive sleep apnea. Surprisingly, jaw shrinkage since the agricultural revolution, leading to an epidemic of crooked teeth, a lack of

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Gaivoronsky, Ivan V., Maria G. Gaivoronskaya, Oksana M. Fandeeva, and Vladimir A. Shashkov. "Typical features of morphometric parameters of the mandible in adults." Курский научно-практический вестник «Человек и его здоровье», no. 2 (June 2020): 34–41. http://dx.doi.org/10.21626/vestnik/2020-2/05.

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Objective: to develop a classification of mandibular forms and to study typical features of the morphometric characteristics of this bone in adults. Materials and methods. The study was conducted on 150 lower jaws of adults. To determine the shape of the lower jaw, four morphometric parameters were measured: angular width, projection length from the corners, branch height, smallest branch width, and three morphometric indexes were introduced: 1 - the long-length longitudinal index of the lower jaw; 2 - longitude latitudinal index of the body of the lower jaw; 3 - latitudinal-altitude index of

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Babich, Vasilii V., and Julia A. Bistrova. "Clinical features of prosthetic treatment in edentuluos patients." Russian Journal of Dentistry 25, no. 3 (April 19, 2022): 247–52. http://dx.doi.org/10.17816/1728-2802-2021-25-3-247-252.

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BACKGROUND: Social adaptation of patients with complete absence of teeth is associated with fixation and stabilization of prostheses during chewing and speech. It is necessary to take into account the somatic status of the patient, the causes of tooth loss, pay attention to the clinical stages of orthopedic treatment. AIM: Of the study is to increase the efficiency of the orthopedic dentist with full removable prosthetics. MATERIAL AND METHODS: The conditions for obtaining a compression impression are a rigid spoon, silicone impression material of medium viscosity, constant pressur

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Zubkova, A. A., Vitaliy Yu Skorikov, M. S. Grishechkin, and E. V. Izhnina. "EVALUATION OF CLINICAL ASPECTS OF APPEARANCE OF TEETH NONCARIOUS DEFECTS IN BROXISM PATIENTS." Russian Journal of Dentistry 23, no. 2 (April 15, 2019): 59–63. http://dx.doi.org/10.18821/1728-2802-2019-23-2-59-63.

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Purpose - to study the etiology, prevalence, clinical course, functional examination and treatment of non-carious lesions located in the cervical area of patients with bruxism. Materials and methods. A prospective study of 200 outpatient cards of dental patients at the dental clinic of the Federal State Budgetary Educational Institution of Higher Medical Education of the KMGU of the Ministry of Health of Russia (Kursk) and Federal State Budgetary Educational Institution of Higher Medical Care of the Kuban State Medical University of the Ministry of Health of Russia (Krasnodar) in the age range

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Cox, Philip G. "The jaw is a second-class lever in Pedetes capensis (Rodentia: Pedetidae)." PeerJ 5 (August 30, 2017): e3741. http://dx.doi.org/10.7717/peerj.3741.

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Abstract (sommario):

The mammalian jaw is often modelled as a third-class lever for the purposes of biomechanical analyses, owing to the position of the resultant muscle force between the jaw joint and the teeth. However, it has been proposed that in some rodents the jaws operate as a second-class lever during distal molar bites, owing to the rostral position of the masticatory musculature. In particular, the infraorbital portion of the zygomatico-mandibularis (IOZM) has been suggested to be of major importance in converting the masticatory system from a third-class to a second-class lever. The presence of the IOZ

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Nor Masitah Mohamed Shukri, Santhosh Kumar M P, and Arthi Balasubramaniam. "Prevalence of Temporomandibular Joint Disorders Among Dental Patients in A Private Institution." International Journal of Research in Pharmaceutical Sciences 11, SPL3 (October 10, 2020): 1309–15. http://dx.doi.org/10.26452/ijrps.v11ispl3.3383.

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Abstract (sommario):

Temporomandibular joints (TMJ) are the bilateral synovial articulation between temporal bone and lower jaw, seen on each side of the jaws. Temporomandibular joint disorders (TMD) can be defined as the tenderness of the jaws and dysfunction of the associated muscles of mastication and the temporomandibular joints, which connect the mandible to the skull. The exact cause of TMD still remains mysterious and unclear. However, the possible attributes of TMD are arthritis, trauma or blow to the TMJ, excessive gum chewing and bruxism. Patients are usually treated with ice packs, gentle massage at the

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Spolaor, Fabiola, Martina Mason, Alberto De Stefani, Giovanni Bruno, Ottavia Surace, Annamaria Guiotto, Antonio Gracco, and Zimi Sawacha. "Effects of Rapid Palatal Expansion on Chewing Biomechanics in Children with Malocclusion: A Surface Electromyography Study." Sensors 20, no. 7 (April 7, 2020): 2086. http://dx.doi.org/10.3390/s20072086.

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Abstract (sommario):

Malocclusion during childhood may affect both morphology and masticatory function and could greatly affect the subsequent growth and development of the jaws and face. The purpose of this study was to evaluate the efficiency of surface electromyography in describing the effects of the rapid palatal expansion (RPE) on Masseter (M) and Temporalis Anterior (T) muscles’ activity in 53 children with different types of malocclusion: bilateral posterior crossbite (BPcb), underdeveloped maxillary complex without crossbite (NOcb) and unilateral posterior crossbite on the right (UPCBr) and on the left (U

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Aksyonov, D. I., Yu N. Mayboroda, E. A. Bragin, and I. N. Aksyonov. "Myofunctional parameters in patients using full removable dentures with progenic and prognathic ratio of the anterior segments of the edentulous jaws." Stomatology for All / International Dental review, no. 2021 3 96 (September 2021): 27–31. http://dx.doi.org/10.35556/idr-2021-3(96)27-31.

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Abstract (sommario):

The aim study was to construct artificial dentitions based on the method of mathematical modeling with the progenic and prognatic ratios of toothless frontal segments and to analyze the functional activity of the masticatory muscles in patients using dentures made in this way, compared with standard prosthetic structures. To compare and interpret the data obtained, electromyographic studies were performed in the control group (16 people), whose teeth were made using the traditional method, and the main group (22 people), whose artificial teeth were formed according to individual mathematical c

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Anderson, Philip S. L., and Mark W. Westneat. "Feeding mechanics and bite force modelling of the skull of Dunkleosteus terrelli , an ancient apex predator." Biology Letters 3, no. 1 (November 28, 2006): 77–80. http://dx.doi.org/10.1098/rsbl.2006.0569.

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Abstract (sommario):

Placoderms are a diverse group of armoured fishes that dominated the aquatic ecosystems of the Devonian Period, 415–360 million years ago. The bladed jaws of predators such as Dunkleosteus suggest that these animals were the first vertebrates to use rapid mouth opening and a powerful bite to capture and fragment evasive prey items prior to ingestion. Here, we develop a biomechanical model of force and motion during feeding in Dunkleosteus terrelli that reveals a highly kinetic skull driven by a unique four-bar linkage mechanism. The linkage system has a high-speed transmission for jaw opening,

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Camp, Ariel L. "What Fish Can Teach Us about the Feeding Functions of Postcranial Muscles and Joints." Integrative and Comparative Biology 59, no. 2 (April 27, 2019): 383–93. http://dx.doi.org/10.1093/icb/icz005.

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Abstract (sommario):

Abstract Studies of vertebrate feeding have predominantly focused on the bones and muscles of the head, not the body. Yet, postcranial musculoskeletal structures like the spine and pectoral girdle are anatomically linked to the head, and may also have mechanical connections through which they can contribute to feeding. The feeding roles of postcranial structures have been best studied in ray-finned fishes, where the body muscles, vertebral column, and pectoral girdle attach directly to the head and help expand the mouth during suction feeding. Therefore, I use the anatomy and motion of the hea

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Terekhova, Kseniya A., Denis A. Kuznetsov, Mikhail A. Postnikov, Nikolai Yu Oborotistov, and Galina V. Kuznetsova. "Assessment of the functional state of the maxillofacial muscles and morphological parameters of the dental system in patients with sagittal occlusion abnormalities." Aspirantskiy Vestnik Povolzhiya 20, no. 5-6 (July 15, 2020): 89–96. http://dx.doi.org/10.17816/2072-2354.2020.20.3.89-96.

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Abstract (sommario):

The article analyzes the morphological parameters of the maxillofacial system and muscle tone indicators of the maxillofacial region in patients with a gnatic form of distal occlusion. Correlation analysis of morphological and functional indicators was performed. We examined 22 patients aged 18-25 years with a gnatic form of distal occlusion of the dentition. The examination included clinical examination, cephalometric analysis with the SimplyCeph program, anthropometric analysis of cast dental models, and the functional method of research-myotonometry. Analysis of the results demonstrates dec

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Anderson, Philip S. L., and Mark W. Westneat. "A biomechanical model of feeding kinematics forDunkleosteus terrelli(Arthrodira, Placodermi)." Paleobiology 35, no. 2 (2009): 251–69. http://dx.doi.org/10.1666/08011.1.

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Abstract (sommario):

Biomechanical models illustrate how the principles of physics and physiology determine function in organisms, allowing ecological inferences and functional predictions to be based on morphology. Dynamic lever and linkage models of the mechanisms of the jaw and skull during feeding in fishes predict function from morphology and have been used to compare the feeding biomechanics of diverse fish groups, including fossil taxa, and to test ideas in ecological morphology. Here we perform detailed computational modeling of the four-bar linkage mechanism in the skull and jaw systems ofDunkleosteus ter

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Tsyhykalo, Oleksandr V., Nataliia B. Kuzniak, Serhij Yu Palis, Roman R. Dmytrenko, and Іgor S. Makarchuk. "PECULIARITIES OF THE SOURCES OF ORIGIN AND MORPHOGENESIS OF THE HUMAN MANDIBLE." Wiadomości Lekarskie 75, no. 4 (2022): 824–30. http://dx.doi.org/10.36740/wlek202204114.

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Abstract (sommario):

The aim: To determine the sources and terms of origin, developmental peculiarities and dynamics of ossification of the mandible during the prenatal period of human ontogenesis. Materials and methods: The research was carried out on the specimens of 30 embryos, 30 pre-fetuses and 60 human fetuses at the period from the 9th to the 12th weeks of the intrauterine development, which were studied by microscopic examination. Three-dimensional computer reconstructions of the human pre-fetal head were made. Results: During the 7th week of development the maxillary processes maximum approach the lateral

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Petrishin, Svitlana, and Z. Ozhohan. "Kappa-splints application for the treatment of pathological dental hard tissues abrasion in combination with dentition defects and dentition deformations." Galician Medical Journal 24, no. 1 (March 20, 2017): 201716. http://dx.doi.org/10.21802/gmj.2017.1.6.

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Abstract (sommario):

Research objective: to develop and implement a new clinical method of producing a set of kappa-splints for splint therapy: treatment and prevention of various forms of pathological teeth abrasion in combination with dentition defects and dentition deformations, which will enable to prevent significant disorders in the dentition.Materials and Methods: 36 patients aged 30-59 have been selected for the targeted research with a generalized form of pathological tooth wear in combination with dentition defects and dentition deformations.Results: After studying the movements of conventional hinge axi

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Khomyn, N. M., A. R. Mysak, I. I. Iglitskej, V. V. Pritsak, N. V. Nazaruk та Y. I. Hrymak. "Етіологічні фактори та наслідки аномалій розвитку зубів і зубного прикусу у собак". Scientific Messenger of LNU of Veterinary Medicine and Biotechnologies 19, № 77 (7 березня 2017): 18–21. http://dx.doi.org/10.15421/nvlvet7705.

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Abstract (sommario):

According to the analysis of literary data it was found that in veterinary dentistry orthodontic disease are common, among which are abnormalities of the teeth and dental bite. The causes of the anomalies of the teeth- jaw apparatus are congenital and acquired. These include hereditary, genetic abnormalities, insufficient development of chewing muscles, insufficient root resorbtion of deciduous teeth, reducing the size of the jaws and gums for virtually no altered the shape of the teeth, errors in diet (soft and liquid feed, calcium deficiency), developmental disability, training with the wron

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Agarwal, Anmol. "The Headache Tale: An Unknown Link between the Head and Neck Muscles, Jaws and the Teeth." Acta Scientific Otolaryngology 3, no. 8 (July 1, 2021): 01. http://dx.doi.org/10.31080/asol.2021.03.0288.

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PAXTON, HANNELORE. "Phylogeny of Eunicida (Annelida) based on morphology of jaws." Zoosymposia 2, no. 1 (August 31, 2009): 241–64. http://dx.doi.org/10.11646/zoosymposia.2.1.18.

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Abstract (sommario):

Eunicida have a complex jaw apparatus with a fossil record dating back to the latest Cambrian. Traditionally, Eunicidae, Onuphidae, and Lumbrineridae were considered closely related families having labidognath maxillae, whereas Oenonidae with prionognath type maxillae were thought to be derived. Molecular phylogenies place Oenonidae with Eunicidae/Onuphidae, and Lumbrineridae as the most basal taxon. Re-evaluation of the jaw types based on morphology and ontogeny demonstrated that the labidognaths Eunicidae and Onuphidae have a closer relationship to the prionognath Oenonidae than was previous

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47

Bukovic, Dino, Igor Glavicic, Goran Dimitric, Miroslav Smajic, Bozana Radanovic, and Biljana Vitosevic. "Assessing temporomandibular disorders: Mouthpiece design considerations." Vojnosanitetski pregled 75, no. 8 (2018): 756–63. http://dx.doi.org/10.2298/vsp160405362b.

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Abstract (sommario):

Background/Aim. Scuba diving is one of the sports with the fastest growing popularity. Nowadays doctors of dental medicine meet divers-patients in their offices more often. Treatment of these patients has some specific features that are related to difficulties in the temporomandibular joint, masticatory muscles and soft tissues of the oral cavity. A set of those complaints represent a condition called ?diver's mouth syndrome?. Most scuba divers complain of temporomandibular joint and the masticatory muscles pain; inadequate mouthpieces can exacerbate temporomandibular dysfunction (TMD) even wh

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Ignateva, L. A., and N. Kh Khamitova. "Impact of myofunctional disorders of the maxillofacial area on the formation of occlusion pathology in children." Kazan medical journal 100, no. 3 (June 13, 2019): 422–25. http://dx.doi.org/10.17816/kmj2019-422.

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Abstract (sommario):

Myodynamic balance of the muscles of maxillofacial area provides required conditions for normal development of dentoalveolar system. Dysfunction of the muscles of facial and oral area is a significant ethiopathogenetic factor of development of anomalies of tooth position and development of upper and lower jaws. Among such factors the most prevalent habits are sucking fingers, mouth breathing (in genetically, anatomically and physiologically caused absence of nasal breathing), incorrect lip seal and infantile swallowing. Position of the tongue in mouth breathing is of particular importance as p

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Skrypa, Olga L., and Yurii L. Bandrivsky. "Determining the frequency of functional disorders of the TMJ in patients with mandible fractures depending on the location." Wiadomości Lekarskie 73, no. 2 (2020): 245–49. http://dx.doi.org/10.36740/wlek202002107.

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Abstract (sommario):

The aim: To investigate the frequency of functional TMJ disorders in patients with fractures of the mandible. Materials and methods: To achieve this goal, 111 patients hospitalized in the department of surgical dentistry of the Chernivtsi Regional Clinical Hospital were examined for traumatic fractures of the mandible with functional disorders of the TMJ (occlusive, muscular, articular disorders). The examination of patients with functional disorders was based on Express – the conclusion of the Hamburg Protocol: 1. pain in palpation of joints; 2. pain in palpation of chewing muscles; 3. presen

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Iordanishvili, A. K. "Gerontostomatology: from science to clinical medicine (survey)." Endodontics Today 18, no. 3 (October 12, 2020): 71–77. http://dx.doi.org/10.36377/1683-2981-2020-18-3-71-77.

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Abstract (sommario):

Aim of the study was, based on the analysis of dissertation research prepared in scientific laboratories and departments of the St. Petersburg Institute of Bioregulation and Gerontology, to present the contribution of the staff of this Institute to the development of modern gerontostomatology. Dissertation research carried out within the walls of the St. Petersburg Institute of Bioregulation and Gerontology in the field of gerontostomatology touched on the pathology of hard tissues and pulp of teeth, rehabilitation in case of tooth loss, periodontal diseases, oral mucosa, injuries and inflamma

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