Articles tagged with Mandible
The trap-jaw ant's mandibles close at 35-64 meters per second, or 78-145 miles per hour, with an average duration of 0.13 milliseconds. The ants accelerate at 100,000 times the force of gravity, generating forces exceeding 300 times their body weight.
Researchers have found that trap-jaw ants can propel themselves through the air using their fast-moving jaws, with two types of defensive propulsion mechanisms discovered. The ants use these mechanisms to escape predators and eject intruders, with bouncer defense allowing them to bounce away from large objects.
Dental patients taking oral bisphosphonates should be aware of potential risks during procedures involving the jaw bone. The American Dental Association recommends a comprehensive oral evaluation and education on maintaining oral hygiene to prevent oral diseases.
The Mayo Clinic has pioneered a novel method of jaw reconstruction for oral cancer patients, utilizing distraction osteogenesis after tumor removal surgery. This approach enables patients to receive both radiation therapy and reconstruction concurrently, minimizing scar tissue and improving patient tolerance.
Researchers found that examiners can replicate tension-headache symptoms in 82% of subjects by testing the temporalis muscle, which is involved in TMJD. This study aims to establish valid and reliable diagnostic criteria for TMJD, which could improve treatment outcomes for those suffering from the disorder.
Researchers discovered that males of the extinct species Thyrohyrax had oversized, swollen lower jaws shaped like a banana, which may have been used to produce sound. The discovery suggests that Thyrohyrax and its fossil relatives were the only mammals to use this skeletal structure for sound production.
The discovery of Au. anamensis fossils in Ethiopia bridges the 1-million-year gap between Ardipithecus and Australopithecus, two species previously thought to be distinct. The new findings provide insight into the evolutionary history of human ancestors, revealing a more complex and nuanced timeline.
A case report identified a serious oral post-surgical complication in a patient receiving IV bisphosphonates for breast carcinoma-related osteopenia. The patient developed osteonecrosis following periodontal surgical therapy, emphasizing the importance of dental evaluations before initiating IV bisphosphonate therapy.
Researchers propose that mass cooperative food foraging in army ants evolved to subdue large prey, a theory supported by the observation of Cheliomyrmex andicola feeding on giant earthworms and snakes. The species' unique jaw structure and venomous sting may play a key role in this behavior.
A study found that individuals with the shortest delays had a greater probability of experiencing the largest number of symptoms, including sweating, which may prompt them to seek treatment early. Those with longer delays had moderate probability of experiencing chest pain and shortness of breath
A new species of ancient crocodile, Dakosaurus andiniensis, has been discovered in Patagonia, South America. The massive creature had a T. rex-like snout and jaws powerful enough to catch large sea creatures.
Researchers discovered that changing an embryo's genetic elements can alter its adult fish jaw structure and function. The study revealed a complex link between embryonic development and biomechanical systems, with specific genes controlling different aspects of the lower jaw.
Researchers discover bmp4 gene plays key role in regulating craniofacial diversity, with implications for understanding human craniofacial defects and preserving species biodiversity. The study provides new insights into the mechanisms underlying biodiversity and offers possibilities for exploring what genes make a head.
A recent study found that implant-placed overdentures have a cumulative survival rate of 95.4% after 10 years, with success rates of 87.3% for maxilla implants and 99.5% for mandible implants. This procedure provides improved chewing function and confidence for individuals with missing teeth.
The study suggests that roots were a primary food source for early humans on the savannah, leading to adaptations in their dental structure. This finding may have contributed to the initial split between humans and other apes, with the ability to eat roots providing a vital survival advantage.
Researchers have discovered that nonlinguistic monkeys have an area comparable to Broca's area, which is responsible for controlling oral and facial actions. This finding suggests that Broca's area may have evolved to control certain aspects of the speech act in humans.
A new study by University at Buffalo researchers found that panoramic X-rays have limited value and can be used selectively in some cases. The study, which evaluated 1,000 panoramic X-rays, revealed that lesions in sinus cavities, soft tissue of the neck, and upper jaw bone were not always picked up on full-mouth-series X-rays.
Dr Hylander's pioneering research on mandible mechanics and jaw joint loading has significantly advanced the field of craniofacial biology. His work has been widely applied and recognized with awards including the NIH Merit Award.
Researchers studied mountain gorillas' diets to understand early human food adaptations, finding increased meat consumption led to genetic changes allowing for fatty foods without heart disease. The study suggests that humans have evolved to eat a 'mushy' diet and are not equipped to cope with substantial foods.
Paleontologists discovered a prehistoric jawbone that suggests the transformation of bones from the jaw into middle ear bones occurred at least twice in living mammal lines. The evidence supports independent origins of this adaptation in monotremes and placentals, contradicting previous doubts.
A 56-year-old man with a cancer-induced jawbone removal underwent a new bone grafting procedure, resulting in successful bone remodelling and mineralisation. He regained the ability to chew and enjoyed his first solid meal in 9 years after transplantation.
Researchers at Rice University have developed a biodegradable implant that can release growth factors to stimulate bone growth in critical-size defects, aiding the body's natural regeneration process. This innovative approach aims to provide patients with their own tissue and eliminate risks associated with existing treatments.
A surgical 'sling' made from polytetrafluoroethylene has been used to lift tissues under the chin, reducing sagging and improving skin elasticity. The procedure has shown a high patient satisfaction rate of over 90%, with no requests for removal.
UMHS researchers found poor bone quality in rats with high-dose radiation, suggesting new therapies to improve human treatment. The study uses a rat model to analyze the success and failure of distraction osteogenesis in irradiated cancer patients.
The discovery sheds light on early modern human biology and their archaic origins. The fossils, dating back 34,000-36,000 years, reveal a mix of modern and archaic characteristics.
Researchers have discovered that microRNAs play a crucial role in controlling plant growth and development by regulating cell division and leaf shape. The study found that a specific microRNA called "Jaw" targets messenger RNAs involved in preventing excessive cell division, leading to abnormal leaf shapes.
Researchers found that the polychaete worm's jaws are hardened by zinc due to its high concentration towards the tip. The study reveals a new paradigm in nature and sparks ideas for materials science, potentially leading to lighter tires and protective coatings.
Research confirms a direct link between small jaws, breathing difficulties, and increased risk of bed-wetting and ear infections in children. Orthodontic treatment has been shown to be effective in reducing or eliminating these issues, offering an alternative to traditional medication or ear tubes.
A newly discovered fossil from Tanzania provides a key anatomical link between two other known specimens, H. rudolfensis and the original H. habilis type specimen. The discovery reshuffles our understanding of early human ancestry, suggesting that all three specimens are likely members of the same species - Homo habilis.
Researchers discovered that jaw stiffness significantly impacts speech production, causing variability in motion as sounds are made. The study measured jaw stiffness and its effect on kinematic variability during speech production, revealing a relationship between the two.
Researchers found that the bloodworm's jaw tip contains an ordered crystalline structure of copper-based biomineral atacamite. This discovery could lead to the development of new materials with properties such as hardness, lightness, and durability. The study also suggests a possible application in drug delivery.
A new study found that estrogen combined with calcium and vitamin D supplements improved jaw mass and density in postmenopausal women, reducing the risk of tooth loss. The study also showed that estrogen had a significant impact on bone mineral density in other parts of the skeleton.
Researchers at Penn State developed new software to design multifunctional surgical instruments, reducing instrument exchanges and improving tactile feedback. The software was used to create a single MIS instrument that can grasp, cut, pivot, and bend around obstructions.
A study of 63 young persons found that children who started wheezing between ages 2 to 5 were highly likely to continue wheezing in adulthood. Researchers also developed a brief questionnaire to predict future asthma-related healthcare utilization. Additionally, sleep disordered breathing was linked to obesity and craniofacial abnormal...
Researchers have found fossil skulls and partial skeletons of the giant Sarcosuchus imperator, which lived during the African Cretaceous period. The species is estimated to have reached its full size in around 50-60 years, suggesting a unique growth pattern that allowed it to attain massive proportions.
Researchers found that caterpillars produce distinct sounds when encountering intruders, which helps them defend their nests and attract predators. In 87% of tests, resident caterpillars successfully repelled intruders using these acoustic signals.
Fossils from three different humans estimated to be about 175,000 years old show a stage of evolutionary development that led to the Neandertals. The jaw fragment reveals signs of reduced chewing force due to food preparation changes, suggesting extensive community support for individuals with difficulty caring for themselves.
A new predatory dinosaur, Masiakasaurus knopfleri, has been discovered in Madagascar with unique features including specialized teeth and jaws. The fossil remains date back to the Late Cretaceous period, around 65-70 million years ago.
A new liposuction method using multiple tiny incisions and a syringe offers more precise fat removal with lower risk of adverse events. The technique facilitates consistent and even fat removal, allowing for accurate measurement of fat volume.
Threadsnakes have evolved a unique feeding mechanism, devouring pupae and larvae of ants at an incredible rate of three or four bites per second. This rapid-fire eating pattern may be crucial for their survival in ant-infested environments, allowing them to outsmart powerful worker ants and secure food.
A new 400-million-year-old primitive shark relative from Bolivia named Pucapampella has been discovered, contradicting the belief that chondrichthyans are primitive due to their jaw characteristics. The fossil suggests that modern shark jaws are an advanced characteristic than the jaws of bony fish.
Temple University Hospital has introduced the internal jaw distraction device DynaForm, which helps regrow destroyed bone and correct facial deformities. The device is less cumbersome than traditional methods and can be used as an alternative to painful extraction for severe tooth crowding.