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Elevator (dental)
Elevators (also known as luxators) are instruments used in dental extractions. They may be used to loosen teeth prior to forcep extraction, to remove roots or impacted teeth, when teeth are compromised and susceptible to fracture or when they are malpositioned and cannot be reached with forceps. Mechanics Elevators work on the principle of leverage to dislodge a tooth from its socket. The fulcrum is usually the crest of the socket bone; however, adjacent teeth can be used if they are also to be extracted. The contact point on the tooth or root surface where force is delivered is described as the ''purchase point'', and the position of this can be idealised by cutting bone or sectioning teeth. With root picks especially, a slot or notch may be cut into the root surface to obtain a purchase point. Varieties Instruments can be broadly classed as elevators or luxators. Conventional elevators are bulkier and are designed to withstand leverage and torquing forces. Luxating elevators are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dental Extraction
A dental extraction (also referred to as tooth extraction, exodontia, exodontics, or informally, tooth pulling) is the removal of teeth from the dental alveolus (socket) in the alveolar bone. Extractions are performed for a wide variety of reasons, but most commonly to remove teeth which have become unrestorable through tooth decay, periodontal disease, or dental trauma, especially when they are associated with toothache. Sometimes impacted wisdom teeth (wisdom teeth that are stuck and unable to grow normally into the mouth) cause recurrent infections of the gum (pericoronitis), and may be removed when other conservative treatments have failed (cleaning, antibiotics and operculectomy). In orthodontics, if the teeth are crowded, healthy teeth may be extracted (often bicuspids) to create space so the rest of the teeth can be straightened. Procedure Extractions could be categorized into non-surgical (simple) and surgical, depending on the type of tooth to be removed and other fac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lever
A lever is a simple machine consisting of a beam or rigid rod pivoted at a fixed hinge, or ''fulcrum''. A lever is a rigid body capable of rotating on a point on itself. On the basis of the locations of fulcrum, load and effort, the lever is divided into three types. Also, leverage is mechanical advantage gained in a system. It is one of the six simple machines identified by Renaissance scientists. A lever amplifies an input force to provide a greater output force, which is said to provide leverage. The ratio of the output force to the input force is the mechanical advantage of the lever. As such, the lever is a mechanical advantage device, trading off force against movement. Etymology The word "lever" entered English around 1300 from Old French, in which the word was ''levier''. This sprang from the stem of the verb ''lever'', meaning "to raise". The verb, in turn, goes back to the Latin ''levare'', itself from the adjective ''levis'', meaning "light" (as in "not heavy"). The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coupland’s Elevators
Coupland’s elevators (also known as chisels) are instruments commonly used for dental extraction. They are used in sets of three each of increasing size and are used to split multi-rooted teeth and are inserted between the bone and tooth roots and rotated to elevate them out of the sockets. The instruments were designed by Doctor Douglas C W Coupland who qualified as a dental surgeon in Toronto in 1922 and spent most of his career practising dentistry in Ottawa Ottawa (, ; Canadian French: ) is the capital city of Canada. It is located at the confluence of the Ottawa River and the Rideau River in the southern portion of the province of Ontario. Ottawa borders Gatineau, Quebec, and forms the core ... where he specialised in dental extraction. Coupland designed the instruments in the 1920s; they were manufactured by the Hu-Friedy company and sold from the early 1930s initially as sets of eight or twelve which were later reduced to three. Coupland also designed a set of den ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lever
A lever is a simple machine consisting of a beam or rigid rod pivoted at a fixed hinge, or ''fulcrum''. A lever is a rigid body capable of rotating on a point on itself. On the basis of the locations of fulcrum, load and effort, the lever is divided into three types. Also, leverage is mechanical advantage gained in a system. It is one of the six simple machines identified by Renaissance scientists. A lever amplifies an input force to provide a greater output force, which is said to provide leverage. The ratio of the output force to the input force is the mechanical advantage of the lever. As such, the lever is a mechanical advantage device, trading off force against movement. Etymology The word "lever" entered English around 1300 from Old French, in which the word was ''levier''. This sprang from the stem of the verb ''lever'', meaning "to raise". The verb, in turn, goes back to the Latin ''levare'', itself from the adjective ''levis'', meaning "light" (as in "not heavy"). The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dental Key
The dental key is an instrument that was used in dentistry to extract diseased teeth. Before the era of antibiotics, dental extraction was often the method of choice to treat dental infections, and extraction instruments date back several centuries. History The dental key, (also known as Clef de Garengeot, Fothergill-Key, English-Key, Dimppel Extractor or Tooth Key) was first mentioned in Alexander Monro's ''Medical Essays and Observations'' in 1742, but had probably been in use since around 1730. It remained popular into the 20th century when it was replaced by the more modern forceps. Design and use Modeled after a door key, the dental key was used by first inserting the instrument horizontally into the mouth, then its "claw" would be tightened over a tooth. The instrument was rotated to loosen the tooth. This often resulted in the tooth breaking, causing jaw fractures and soft tissue damage. The design of the dental key evolved over the years. The original design fea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dental Equipment
Dental instruments are tools that dental professionals use to provide dental treatment. They include tools to examine, manipulate, treat, restore, and remove teeth and surrounding oral structures. Examination instruments These tools allow dental professionals to manipulate tissues for better visual access during treatment or during dental examination. Dental mirror The dentist or dental auxiliary use dental mirrors to view a mirror image of the teeth in locations of the mouth where visibility is difficult or impossible. They also are used for reflecting light onto desired surfaces, and for retraction of soft tissues to improve access or vision. Probes * Dental explorer (sickle probe) *Periodontal probe Retractors *Cheek retractor *Dental mirror *Lip retractor *Mouth prop *Tongue retractor Local anesthesia *Dental anesthesia and dental syringe Anesthesia is broken down into three main categories: local, regional, and general, all of which affect the nervous system in some w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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