Tanaka, Yuto; Tsugawa, Tsuyoshi; Maeda, Yoshinobu
Effect of mouthguards on impact to the craniomandibular complex Journal Article
In: Dental Traumatology, vol. 33, no. 1, pp. 51–56, 2017, ISBN: 16004469.
Abstract | Links | BibTeX | Tags: Concussion, craniomandibular complex, Face -- Wounds & injuries, Impact loads (Engineering), Jaws, MOUTH protectors, Mouthguard, Pendulums, teeth-clenching, Temporomandibular joint
@article{Tanaka2017,
title = {Effect of mouthguards on impact to the craniomandibular complex},
author = {Tanaka, Yuto and Tsugawa, Tsuyoshi and Maeda, Yoshinobu},
doi = {10.1111/edt.12283},
isbn = {16004469},
year = {2017},
date = {2017-01-01},
journal = {Dental Traumatology},
volume = {33},
number = {1},
pages = {51--56},
abstract = {\<bold\>Background: \</bold\>The aim of this study was to investigate the effect of wearing a mouthguard and teeth-clenching on impact to the head and temporomandibular joint (TMJ) during a blow to the jaw.\<bold\>Material and Methods: \</bold\>A custom-made mouthguard was fabricated for five participants. A 4.1-N impact load was applied to the chin with a pendulum. Two acceleration sensors were attached to the forehead and left TMJ. The amplitudes and durations of the accelerations were obtained under five conditions: mouth-open without mouthguard; light teeth-clenching without mouthguard; maximum voluntary clenching (MVC) without mouthguard; mouth-open with mouthguard and MVC with mouthguard.\<bold\>Results: \</bold\>Wearing a mouthguard led to significant decreases in the amplitude (mouth-open with mouthguard vs mouth-open without mouthguard},
keywords = {Concussion, craniomandibular complex, Face -- Wounds \& injuries, Impact loads (Engineering), Jaws, MOUTH protectors, Mouthguard, Pendulums, teeth-clenching, Temporomandibular joint},
pubstate = {published},
tppubtype = {article}
}
Wu, L C; Nangia, V; Bui, K; Hammoor, B; Kurt, M; Hernandez, F; Kuo, C; Camarillo, D B
In Vivo Evaluation of Wearable Head Impact Sensors Journal Article
In: Annals of Biomedical Engineering, vol. 44, no. 4, pp. 1234–1245, 2016.
Abstract | BibTeX | Tags: *Head Movements/ph [Physiology], *Models, *Soccer/ph [Physiology], *Telemetry/is [Instrumentation], adult, Biological, Biomechanical Phenomena, Craniocerebral Trauma, Humans, Male, MOUTH protectors, Skin, Soccer/in [Injuries], VIDEO recording
@article{Wu2016,
title = {In Vivo Evaluation of Wearable Head Impact Sensors},
author = {Wu, L C and Nangia, V and Bui, K and Hammoor, B and Kurt, M and Hernandez, F and Kuo, C and Camarillo, D B},
year = {2016},
date = {2016-01-01},
journal = {Annals of Biomedical Engineering},
volume = {44},
number = {4},
pages = {1234--1245},
abstract = {Inertial sensors are commonly used to measure human head motion. Some sensors have been tested with dummy or cadaver experiments with mixed results, and methods to evaluate sensors in vivo are lacking. Here we present an in vivo method using high speed video to test teeth-mounted (mouthguard), soft tissue-mounted (skin patch), and headgear-mounted (skull cap) sensors during 6-13 g sagittal soccer head impacts. Sensor coupling to the skull was quantified by displacement from an ear-canal reference. Mouthguard displacements were within video measurement error (\<1 mm), while the skin patch and skull cap displaced up to 4 and 13 mm from the ear-canal reference, respectively. We used the mouthguard, which had the least displacement from skull, as the reference to assess 6-degree-of-freedom skin patch and skull cap measurements. Linear and rotational acceleration magnitudes were over-predicted by both the skin patch (with 120% NRMS error for a(mag), 290% for alpha(mag)) and the skull cap (320% NRMS error for a(mag), 500% for alpha(mag)). Such over-predictions were largely due to out-of-plane motion. To model sensor error, we found that in-plane skin patch linear acceleration in the anterior-posterior direction could be modeled by an underdamped viscoelastic system. In summary, the mouthguard showed tighter skull coupling than the other sensor mounting approaches. Furthermore, the in vivo methods presented are valuable for investigating skull acceleration sensor technologies.},
keywords = {*Head Movements/ph [Physiology], *Models, *Soccer/ph [Physiology], *Telemetry/is [Instrumentation], adult, Biological, Biomechanical Phenomena, Craniocerebral Trauma, Humans, Male, MOUTH protectors, Skin, Soccer/in [Injuries], VIDEO recording},
pubstate = {published},
tppubtype = {article}
}
Demorest, Rebecca A; Koutures, Chris
Youth Participation and Injury Risk in Martial Arts Journal Article
In: Pediatrics, vol. 138, no. 6, pp. 112–120, 2016, ISBN: 00314005.
Abstract | Links | BibTeX | Tags: BRAIN -- Concussion, CHILDREN -- Health, Martial Arts, Martial arts injuries, Martial arts injuries -- Risk factors, MOUTH protectors, pediatrics, Physical training & conditioning, PREVENTION, SAFETY hats
@article{Demorest2016,
title = {Youth Participation and Injury Risk in Martial Arts},
author = {Demorest, Rebecca A and Koutures, Chris},
doi = {10.1542/peds.2016-3022},
isbn = {00314005},
year = {2016},
date = {2016-01-01},
journal = {Pediatrics},
volume = {138},
number = {6},
pages = {112--120},
abstract = {The martial arts can provide children and adolescents with vigorous levels of physical exercise that can improve overall physical fitness. The various types of martial arts encompass noncontact basic forms and techniques that may have a lower relative risk of injury. Contact-based sparring with competitive training and bouts have a higher risk of injury. This clinical report describes important techniques and movement patterns in several types of martial arts and reviews frequently reported injuries encountered in each discipline, with focused discussions of higher risk activities. Some of these higher risk activities include blows to the head and choking or submission movements that may cause concussions or significant head injuries. The roles of rule changes, documented benefits of protective equipment, and changes in training recommendations in attempts to reduce injury are critically assessed. This information is intended to help pediatric health care providers counsel patients and families in encouraging safe participation in martial arts. [ABSTRACT FROM AUTHOR]},
keywords = {BRAIN -- Concussion, CHILDREN -- Health, Martial Arts, Martial arts injuries, Martial arts injuries -- Risk factors, MOUTH protectors, pediatrics, Physical training \& conditioning, PREVENTION, SAFETY hats},
pubstate = {published},
tppubtype = {article}
}
Tanaka, Yuto; Tsugawa, Tsuyoshi; Maeda, Yoshinobu
Effect of mouthguards on impact to the craniomandibular complex Journal Article
In: Dental Traumatology, vol. 33, no. 1, pp. 51–56, 2017, ISBN: 16004469.
@article{Tanaka2017,
title = {Effect of mouthguards on impact to the craniomandibular complex},
author = {Tanaka, Yuto and Tsugawa, Tsuyoshi and Maeda, Yoshinobu},
doi = {10.1111/edt.12283},
isbn = {16004469},
year = {2017},
date = {2017-01-01},
journal = {Dental Traumatology},
volume = {33},
number = {1},
pages = {51--56},
abstract = {\<bold\>Background: \</bold\>The aim of this study was to investigate the effect of wearing a mouthguard and teeth-clenching on impact to the head and temporomandibular joint (TMJ) during a blow to the jaw.\<bold\>Material and Methods: \</bold\>A custom-made mouthguard was fabricated for five participants. A 4.1-N impact load was applied to the chin with a pendulum. Two acceleration sensors were attached to the forehead and left TMJ. The amplitudes and durations of the accelerations were obtained under five conditions: mouth-open without mouthguard; light teeth-clenching without mouthguard; maximum voluntary clenching (MVC) without mouthguard; mouth-open with mouthguard and MVC with mouthguard.\<bold\>Results: \</bold\>Wearing a mouthguard led to significant decreases in the amplitude (mouth-open with mouthguard vs mouth-open without mouthguard},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Wu, L C; Nangia, V; Bui, K; Hammoor, B; Kurt, M; Hernandez, F; Kuo, C; Camarillo, D B
In Vivo Evaluation of Wearable Head Impact Sensors Journal Article
In: Annals of Biomedical Engineering, vol. 44, no. 4, pp. 1234–1245, 2016.
@article{Wu2016,
title = {In Vivo Evaluation of Wearable Head Impact Sensors},
author = {Wu, L C and Nangia, V and Bui, K and Hammoor, B and Kurt, M and Hernandez, F and Kuo, C and Camarillo, D B},
year = {2016},
date = {2016-01-01},
journal = {Annals of Biomedical Engineering},
volume = {44},
number = {4},
pages = {1234--1245},
abstract = {Inertial sensors are commonly used to measure human head motion. Some sensors have been tested with dummy or cadaver experiments with mixed results, and methods to evaluate sensors in vivo are lacking. Here we present an in vivo method using high speed video to test teeth-mounted (mouthguard), soft tissue-mounted (skin patch), and headgear-mounted (skull cap) sensors during 6-13 g sagittal soccer head impacts. Sensor coupling to the skull was quantified by displacement from an ear-canal reference. Mouthguard displacements were within video measurement error (\<1 mm), while the skin patch and skull cap displaced up to 4 and 13 mm from the ear-canal reference, respectively. We used the mouthguard, which had the least displacement from skull, as the reference to assess 6-degree-of-freedom skin patch and skull cap measurements. Linear and rotational acceleration magnitudes were over-predicted by both the skin patch (with 120% NRMS error for a(mag), 290% for alpha(mag)) and the skull cap (320% NRMS error for a(mag), 500% for alpha(mag)). Such over-predictions were largely due to out-of-plane motion. To model sensor error, we found that in-plane skin patch linear acceleration in the anterior-posterior direction could be modeled by an underdamped viscoelastic system. In summary, the mouthguard showed tighter skull coupling than the other sensor mounting approaches. Furthermore, the in vivo methods presented are valuable for investigating skull acceleration sensor technologies.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Demorest, Rebecca A; Koutures, Chris
Youth Participation and Injury Risk in Martial Arts Journal Article
In: Pediatrics, vol. 138, no. 6, pp. 112–120, 2016, ISBN: 00314005.
@article{Demorest2016,
title = {Youth Participation and Injury Risk in Martial Arts},
author = {Demorest, Rebecca A and Koutures, Chris},
doi = {10.1542/peds.2016-3022},
isbn = {00314005},
year = {2016},
date = {2016-01-01},
journal = {Pediatrics},
volume = {138},
number = {6},
pages = {112--120},
abstract = {The martial arts can provide children and adolescents with vigorous levels of physical exercise that can improve overall physical fitness. The various types of martial arts encompass noncontact basic forms and techniques that may have a lower relative risk of injury. Contact-based sparring with competitive training and bouts have a higher risk of injury. This clinical report describes important techniques and movement patterns in several types of martial arts and reviews frequently reported injuries encountered in each discipline, with focused discussions of higher risk activities. Some of these higher risk activities include blows to the head and choking or submission movements that may cause concussions or significant head injuries. The roles of rule changes, documented benefits of protective equipment, and changes in training recommendations in attempts to reduce injury are critically assessed. This information is intended to help pediatric health care providers counsel patients and families in encouraging safe participation in martial arts. [ABSTRACT FROM AUTHOR]},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Tanaka, Yuto; Tsugawa, Tsuyoshi; Maeda, Yoshinobu
Effect of mouthguards on impact to the craniomandibular complex Journal Article
In: Dental Traumatology, vol. 33, no. 1, pp. 51–56, 2017, ISBN: 16004469.
Abstract | Links | BibTeX | Tags: Concussion, craniomandibular complex, Face -- Wounds & injuries, Impact loads (Engineering), Jaws, MOUTH protectors, Mouthguard, Pendulums, teeth-clenching, Temporomandibular joint
@article{Tanaka2017,
title = {Effect of mouthguards on impact to the craniomandibular complex},
author = {Tanaka, Yuto and Tsugawa, Tsuyoshi and Maeda, Yoshinobu},
doi = {10.1111/edt.12283},
isbn = {16004469},
year = {2017},
date = {2017-01-01},
journal = {Dental Traumatology},
volume = {33},
number = {1},
pages = {51--56},
abstract = {\<bold\>Background: \</bold\>The aim of this study was to investigate the effect of wearing a mouthguard and teeth-clenching on impact to the head and temporomandibular joint (TMJ) during a blow to the jaw.\<bold\>Material and Methods: \</bold\>A custom-made mouthguard was fabricated for five participants. A 4.1-N impact load was applied to the chin with a pendulum. Two acceleration sensors were attached to the forehead and left TMJ. The amplitudes and durations of the accelerations were obtained under five conditions: mouth-open without mouthguard; light teeth-clenching without mouthguard; maximum voluntary clenching (MVC) without mouthguard; mouth-open with mouthguard and MVC with mouthguard.\<bold\>Results: \</bold\>Wearing a mouthguard led to significant decreases in the amplitude (mouth-open with mouthguard vs mouth-open without mouthguard},
keywords = {Concussion, craniomandibular complex, Face -- Wounds \& injuries, Impact loads (Engineering), Jaws, MOUTH protectors, Mouthguard, Pendulums, teeth-clenching, Temporomandibular joint},
pubstate = {published},
tppubtype = {article}
}
Wu, L C; Nangia, V; Bui, K; Hammoor, B; Kurt, M; Hernandez, F; Kuo, C; Camarillo, D B
In Vivo Evaluation of Wearable Head Impact Sensors Journal Article
In: Annals of Biomedical Engineering, vol. 44, no. 4, pp. 1234–1245, 2016.
Abstract | BibTeX | Tags: *Head Movements/ph [Physiology], *Models, *Soccer/ph [Physiology], *Telemetry/is [Instrumentation], adult, Biological, Biomechanical Phenomena, Craniocerebral Trauma, Humans, Male, MOUTH protectors, Skin, Soccer/in [Injuries], VIDEO recording
@article{Wu2016,
title = {In Vivo Evaluation of Wearable Head Impact Sensors},
author = {Wu, L C and Nangia, V and Bui, K and Hammoor, B and Kurt, M and Hernandez, F and Kuo, C and Camarillo, D B},
year = {2016},
date = {2016-01-01},
journal = {Annals of Biomedical Engineering},
volume = {44},
number = {4},
pages = {1234--1245},
abstract = {Inertial sensors are commonly used to measure human head motion. Some sensors have been tested with dummy or cadaver experiments with mixed results, and methods to evaluate sensors in vivo are lacking. Here we present an in vivo method using high speed video to test teeth-mounted (mouthguard), soft tissue-mounted (skin patch), and headgear-mounted (skull cap) sensors during 6-13 g sagittal soccer head impacts. Sensor coupling to the skull was quantified by displacement from an ear-canal reference. Mouthguard displacements were within video measurement error (\<1 mm), while the skin patch and skull cap displaced up to 4 and 13 mm from the ear-canal reference, respectively. We used the mouthguard, which had the least displacement from skull, as the reference to assess 6-degree-of-freedom skin patch and skull cap measurements. Linear and rotational acceleration magnitudes were over-predicted by both the skin patch (with 120% NRMS error for a(mag), 290% for alpha(mag)) and the skull cap (320% NRMS error for a(mag), 500% for alpha(mag)). Such over-predictions were largely due to out-of-plane motion. To model sensor error, we found that in-plane skin patch linear acceleration in the anterior-posterior direction could be modeled by an underdamped viscoelastic system. In summary, the mouthguard showed tighter skull coupling than the other sensor mounting approaches. Furthermore, the in vivo methods presented are valuable for investigating skull acceleration sensor technologies.},
keywords = {*Head Movements/ph [Physiology], *Models, *Soccer/ph [Physiology], *Telemetry/is [Instrumentation], adult, Biological, Biomechanical Phenomena, Craniocerebral Trauma, Humans, Male, MOUTH protectors, Skin, Soccer/in [Injuries], VIDEO recording},
pubstate = {published},
tppubtype = {article}
}
Demorest, Rebecca A; Koutures, Chris
Youth Participation and Injury Risk in Martial Arts Journal Article
In: Pediatrics, vol. 138, no. 6, pp. 112–120, 2016, ISBN: 00314005.
Abstract | Links | BibTeX | Tags: BRAIN -- Concussion, CHILDREN -- Health, Martial Arts, Martial arts injuries, Martial arts injuries -- Risk factors, MOUTH protectors, pediatrics, Physical training & conditioning, PREVENTION, SAFETY hats
@article{Demorest2016,
title = {Youth Participation and Injury Risk in Martial Arts},
author = {Demorest, Rebecca A and Koutures, Chris},
doi = {10.1542/peds.2016-3022},
isbn = {00314005},
year = {2016},
date = {2016-01-01},
journal = {Pediatrics},
volume = {138},
number = {6},
pages = {112--120},
abstract = {The martial arts can provide children and adolescents with vigorous levels of physical exercise that can improve overall physical fitness. The various types of martial arts encompass noncontact basic forms and techniques that may have a lower relative risk of injury. Contact-based sparring with competitive training and bouts have a higher risk of injury. This clinical report describes important techniques and movement patterns in several types of martial arts and reviews frequently reported injuries encountered in each discipline, with focused discussions of higher risk activities. Some of these higher risk activities include blows to the head and choking or submission movements that may cause concussions or significant head injuries. The roles of rule changes, documented benefits of protective equipment, and changes in training recommendations in attempts to reduce injury are critically assessed. This information is intended to help pediatric health care providers counsel patients and families in encouraging safe participation in martial arts. [ABSTRACT FROM AUTHOR]},
keywords = {BRAIN -- Concussion, CHILDREN -- Health, Martial Arts, Martial arts injuries, Martial arts injuries -- Risk factors, MOUTH protectors, pediatrics, Physical training \& conditioning, PREVENTION, SAFETY hats},
pubstate = {published},
tppubtype = {article}
}