|
Abutment (dentistry)
In dentistry, an abutment is a connecting element. This is used in the context of a fixed bridge (the "abutment teeth" referring to the teeth supporting the bridge), Removable partial denture, partial removable dentures (the "abutment teeth" referring to the teeth supporting the partial) and in dental implant, implants (used to attach a Crown (dental restoration), crown, Bridge (dentistry), bridge, or removable Dentures, denture to the dental implant fixture). The implant fixture is the screw-like component that is Osseointegration, osseointegrated. Bridge abutments Bridge (dentistry), Dental bridge abutments are made such that the path of insertion of the teeth involved is nearly parallel with each other. Partial denture abutments Partial denture abutments are unique in that they may incorporate elements such as rest seats, guide planes, and recontouring. Implant abutments These are usually called prosthetic implant abutments and are responsible for making the connection betw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dentistry
Dentistry, also known as dental medicine and oral medicine, is the branch of medicine focused on the Human tooth, teeth, gums, and Human mouth, mouth. It consists of the study, diagnosis, prevention, management, and treatment of diseases, disorders, and conditions of the mouth, most commonly focused on dentition (the development and arrangement of teeth) as well as the oral mucosa. Dentistry may also encompass other aspects of the craniofacial complex including the temporomandibular joint. The practitioner is called a dentist. The history of dentistry is almost as ancient as the history of humanity and civilization, with the earliest evidence dating from 7000 BC to 5500 BC. Dentistry is thought to have been the first specialization in medicine which has gone on to develop its own accredited degree with its own specializations. Dentistry is often also understood to subsume the now largely defunct medical specialty of stomatology (the study of the mouth and its disorders and dis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zirconia
Zirconium dioxide (), sometimes known as zirconia (not to be confused with zirconium silicate or zircon), is a white crystalline oxide of zirconium. Its most naturally occurring form, with a monoclinic crystalline structure, is the mineral baddeleyite. A dopant stabilized cubic structured zirconia, cubic zirconia, is synthesized in various colours for use as a gemstone and a diamond simulant. Production, chemical properties, occurrence Zirconia is produced by calcining zirconium compounds, exploiting its high thermostability.Ralph Nielsen "Zirconium and Zirconium Compounds" in Ullmann's Encyclopedia of Industrial Chemistry, 2005, Wiley-VCH, Weinheim. Structure Three phases are known: monoclinic below 1170 °C, tetragonal between 1170 °C and 2370 °C, and cubic above 2370 °C. The trend is for higher symmetry at higher temperatures, as is usually the case. A small percentage of the oxides of calcium or yttrium stabilize in the cubic phase. The very ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Journal Of Prosthetic Dentistry
The ''Journal of Prosthetic Dentistry'' is a monthly peer-reviewed medical journal covering prosthodontics and restorative dentistry. It is published by Elsevier on behalf of the Editorial Council for the Journal of Prosthetic Dentistry and the editor-in-chief is Stephen F. Rosenstiel (Ohio State University). It is the official publication for 24 prosthodontic organisations. Abstracting and indexing The journal is abstracted and indexed in Index Medicus/MEDLINE/PubMed and CINAHL. According to the ''Journal Citation Reports'', the journal has a 2021 impact factor The impact factor (IF) or journal impact factor (JIF) of an academic journal is a type of journal ranking. Journals with higher impact factor values are considered more prestigious or important within their field. The Impact Factor of a journa ... of 4.148. References External links * Dentistry journals Surgery journals Elsevier academic journals English-language journals Monthly journals Academic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Morse Taper
A machine taper is a system for securing cutting tools or toolholders in the spindle of a machine tool or power tool. A male member of conical form (that is, with a taper) fits into the female socket, which has a matching taper of equal angle. Almost all machine tool spindles, and many power tool spindles, have a taper as their primary method of attachment for tools. Even on many drill presses, handheld drills, and lathes, which have chucks (such as a drill chuck or collet chuck), the chuck is attached by a taper. On drills, drill presses, and milling machines, the male member is the tool shank or toolholder shank, and the female socket is integral with the spindle. On lathes, the male may belong to the tool or to the spindle; spindle noses may have male tapers, female tapers, or both. Explanation Machine tool operators must be able to install or remove tool bits quickly and easily. A lathe, for example, has a rotating spindle in its headstock, to which one may wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dental Torque Wrench
A dental torque wrench or restorative torque wrench is a torque wrench used to precisely apply a specific torque to a fastener bolt for fixation of an abutment, dentures or prosthetics on a dental implant. Manual mechanical torque wrench Toggle torque wrenches ( friction-style) and beam wrenches ( spring-style) are the most common types in dentistry Dentistry, also known as dental medicine and oral medicine, is the branch of medicine focused on the Human tooth, teeth, gums, and Human mouth, mouth. It consists of the study, diagnosis, prevention, management, and treatment of diseases, dis ... as Hand, manual mechanical torque-limiting devices. Beam type wrenches in general are more consistent to its calibration than toggle types. The beam types with a Indicator (distance amplifying instrument), dial indicator are the most precise to set the Tare torque (zero point reset). Because steam sterilization processes like an autoclave are applied to the dental torque wrenches ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Torque
In physics and mechanics, torque is the rotational analogue of linear force. It is also referred to as the moment of force (also abbreviated to moment). The symbol for torque is typically \boldsymbol\tau, the lowercase Greek letter ''tau''. When being referred to as moment of force, it is commonly denoted by . Just as a linear force is a push or a pull applied to a body, a torque can be thought of as a twist applied to an object with respect to a chosen point; for example, driving a screw uses torque to force it into an object, which is applied by the screwdriver rotating around its axis to the drives on the head. Historical terminology The term ''torque'' (from Latin , 'to twist') is said to have been suggested by James Thomson and appeared in print in April, 1884. Usage is attested the same year by Silvanus P. Thompson in the first edition of ''Dynamo-Electric Machinery''. Thompson describes his usage of the term as follows: Today, torque is referred to using d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Butt Joint
A butt joint is a joinery, wood joint in which the end of a piece of material is simply placed (or “butted”) against another piece. The butt joint is the simplest joint. An unreinforced butt joint is also the weakest joint, as it provides a limited surface area for gluing and lacks any mechanical interlocking to resist external forces. Nonetheless, it generally provides sufficient strength in most cases, particularly when fasteners are used. Additional reinforcement through Tie (engineering), ties and plates is often used to improve the characteristics of butt-jointed structures. The joint is widely used in many applications due to its simplicity, notably in rough carpentry and construction. Methods There are several types of butt joint based on the orientation of the pieces being joined. These include the T-butt, end-to-end butt, Miter butt and edge-to-edge butt. The T-butt joint is a very simple joint to construct. Members are simply docked (cut off) at a right angle and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fractured Abutment Screws 3 Implants
Fractured may refer to: * Fracture, the separation of a material into pieces under the action of stress * Bone fracture A bone fracture (abbreviated FRX or Fx, Fx, or #) is a medical condition in which there is a partial or complete break in the continuity of any bone in the body. In more severe cases, the bone may be broken into several fragments, known as a ''c ..., a partial or complete break in the continuity of the bone Books * ''Fractured'' (novel), a 2008 novel by Karin Slaughter * ''Fractured'' (Yates book), a 2021 non-fiction book by Jon Yates Film and TV * ''Fractured'' (2013 film), an American horror film by Adam Gierasch * ''Fractured'' (2019 film), an American thriller film by Brad Anderson * “Fractured”, an episode of ''The Good Doctor'' Music * ''Fractured'' (Capharnaum album) or the title song, 2004 * ''Fractured'' (Lunatic Soul album) or the title song, 2017 * ''Fractured'', an album by New Mind ( Jonathan Sharp), 1993 * "Fractured" (Bill Haley so ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Masticatory Force
Masticatory force or force of mastication is the force created by the dynamic action of the masticatory muscles during the act of chewing. Masticatory muscles The muscles that power the jaw movements during chewing are known as the muscles of mastication or masticatory muscles, and are functionally classified as: * Jaw elevators: the masseter, temporalis, medial pterygoid and superior belly of the lateral pterygoid * Jaw depressors; the anterior digastrics, geniohyoid, mylohyoid and inferior belly of the lateral pterygoid Measuring masticatory force The first device for measuring masticatory force ( gnathodynamometer) was created by Black in 1893. He determined that periodontal tissue is an important issue, which impacts the amount of force. Morill found out that masticatory muscles stop their contraction differently upon the appearance of pain signals from the periodontal tissue. Shreder used local anaesthesia to ignore the periodontal response to measure the maximu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Molar (tooth)
The molars or molar teeth are large, flat teeth at the back of the mouth. They are more developed in mammals. They are used primarily to grind food during chewing. The name ''molar'' derives from Latin, ''molaris dens'', meaning "millstone tooth", from ''mola'', millstone and ''dens'', tooth. Molars show a great deal of diversity in size and shape across the mammal groups. The third molar of humans is sometimes vestigial. Human anatomy In humans, the molar teeth have either four or five cusps. Adult humans have 12 molars, in four groups of three at the back of the mouth. The third, rearmost molar in each group is called a wisdom tooth. It is the last tooth to appear, breaking through the front of the gum at about the age of 20, although this varies among individuals and populations, and in many cases the tooth is missing. The human mouth contains upper (maxillary) and lower (mandibular) molars. They are: maxillary first molar, maxillary second molar, maxillary third mol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ceramic
A ceramic is any of the various hard, brittle, heat-resistant, and corrosion-resistant materials made by shaping and then firing an inorganic, nonmetallic material, such as clay, at a high temperature. Common examples are earthenware, porcelain, and brick. The earliest ceramics made by humans were fired clay bricks used for building house walls and other structures. Other pottery objects such as pots, vessels, vases and figurines were made from clay, either by itself or mixed with other materials like silica, hardened by sintering in fire. Later, ceramics were glazed and fired to create smooth, colored surfaces, decreasing porosity through the use of glassy, amorphous ceramic coatings on top of the crystalline ceramic substrates. Ceramics now include domestic, industrial, and building products, as well as a wide range of materials developed for use in advanced ceramic engineering, such as semiconductors. The word '' ceramic'' comes from the Ancient Greek word (), meaning ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
