(n.) Apparatus above ground at the mouth of a mine or deep well.
Example Sentences:
(1) Asymmetries occur less often whilst using the low-cervical-pull according to Sander, due to the reduced friction between the two plastic parts of this headgear system.
(2) Eight macerated human child skulls with a dental age of approximately 9.5 years (mixed dentition) were consecutively subjected to an experimental standardized high-pull headgear traction system attached to the maxilla at the first permanent molar area via an immovable acrylic resin splint covering all teeth.
(3) Questionnaires designed to assess attitudes and use of headgear were completed by 537 Division I collegiate wrestlers.
(4) This is brought about by the corresponding mechanics of the activator-headgear combination.
(5) These results demonstrated that open bite complicated by a Class II vertical growth pattern can be treated during the mixed dentition with favorable results by a combination of a removable functional appliance and high-pull headgear.
(6) While no change in SNA occurred with Andresen therapy, Begg and headgear therapies produced a permanent reduction in the variable.
(7) The bite-jumping-appliance BJA is a special functional appliance which affects the upper jaw comparably to activator headgear combinations (SNA angle).
(8) Cervical headgear, Class II, or vertical elastics were used when indicated.
(9) All wearers of headgear and their families should be educated in the proper use of these devices and about the potential for severe facial injuries.
(10) The headgear force can either be distributed directly on the teeth to be moved, on hooks which are soldered on the archwire, on chin caps or mandibular troughs resp.
(11) Two types of cervical headgear were presented, the cervical traction with caudal tip and with cranial tip of the long outer bow.
(12) The pterygoid plates of the sphenoid bone, the zygomatic arches, the junction of the maxilla with the lacrimal bone and the ethmoid, and the maxillary teeth were affected by both types of headgear.
(13) The bilateral ear protection device, referred to as "headgear", is fitted to all patients in the burn center who require intubation for an inhalation injury; it is worn continuously until extubation.
(14) The facebow, which is of necessity removable, can be displaced from its intra-oral attachments (whilst still connected to the headgear by the elastics) and may result in personal injury.
(15) Girls were more cooperative in wearing headgear, which was related to their more general attitude of cooperation.
(16) A small reduction was also produced in SNB by Begg and headgear therapies.
(17) The effect of lever arms in the headgear assembly on the load delivered to the teeth warrants further study.
(18) Six subjects would rotate their heads laterally (from side-to-side) for 30 min with each of the headgear loading combinations.
(19) The study comprises an analysis of the effect of treatment with a modified activator combined with a high-pull headgear during a standardized observation period of the initial 6 months of treatment.
(20) Four subjects were monitored in the sleep lab with both our headgear and standard polysomnography.
Helmet
Definition:
(n.) A defensive covering for the head. See Casque, Headpiece, Morion, Sallet, and Illust. of Beaver.
(n.) The representation of a helmet over shields or coats of arms, denoting gradations of rank by modifications of form.
(n.) A helmet-shaped hat, made of cork, felt, metal, or other suitable material, worn as part of the uniform of soldiers, firemen, etc., also worn in hot countries as a protection from the heat of the sun.
(n.) That which resembles a helmet in form, position, etc.
(n.) The upper part of a retort.
(n.) The hood-formed upper sepal or petal of some flowers, as of the monkshood or the snapdragon.
(n.) A naked shield or protuberance on the top or fore part of the head of a bird.
Example Sentences:
(1) It follows that he would not allow a biker to give evidence while wearing a crash helmet with the visor down.
(2) The design of motor cycle helmets has been changing over the years and at the present time there are two basic types in popular use: "full-face" and "jet" helmets.
(3) Ultimately, we hope such a program will increase helmet use and consequently reduce morbidity and mortality from head injury in Indiana's children.
(4) The study showed surprising results: in the majority of cases, the helmet does not protect the wearer, but instead intensifies the damage caused by the bullet.
(5) 9.18am GMT Johnson says he does not wear his helmet all the time when he cycles.
(6) The front door is open; outside, a line of police carrying riot helmets files past.
(7) Fifty-seven percent of riders were wearing helmets during the mishap.
(8) The protective performance of the helmet shells, impact absorbing liners, and retention systems were evaluated, and the severity of the impacts sustained by the helmets was simulated in the test laboratory.
(9) Members of the elite police squad wearing helmets came running out of the building and a police union representative at the cordon around the area shouted: "He's dead, he's dead."
(10) Ten subjects took part in the trial in a tropical environment by wearing helmets repeatedly (6 h a day) for one month.
(11) Here's one entry: 1995: The government is full of jack-booted thugs in bucket helmets.
(12) The analysis of the results allowed a conclusion that the latter are concerned with a discoupling effect of substances on oxidative phosphorylation in mitochondria of helmets and their host.
(13) To better understand motion in the cervical spine related to helmet wearing and removal, normal volunteers underwent videotaped fluoroscopy during helmet removal and lateral spine X-rays in various positions.
(14) We describe the mechanics of a multifaceted campaign undertaken to alter this situation, involving a coalition of health, bicycle, and helmet industry organizations.
(15) Japan's prime minister, Shinzo Abe, wearing a red helmet, during a tour of the Fukushima Daiichi plant.
(16) This article presents 1990 self-reported data from U.S. students in grades 9-12 regarding the prevalence of three behaviors that reduce the risk for injuries from motor-vehicle crashes-safety-belt use, motorcycle-helmet use, and bicycle-helmet use.
(17) The helmet usage was analyzed in two clinical study populations including 200 injured from the county of Västerbotten from two periods 1979-1980 and 1985-86.
(18) These data support the need for both increased public education regarding helmet use and mandatory helmet use legislation.
(19) The relative frequency of serious head injury was highest for drivers not wearing helmets who were involved in collisions at low or high speeds.
(20) Women's lacrosse is potentially hazardous because, unlike men's lacrosse, helmets and face masks are not required.