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Dental Glossary


A B C D E F G H I J K L M N O P Q R S T U V W X Y Z


A –

Abfraction

Wear, or notching, at the neck of a tooth at or below the gumline. Often sensitive, often accompanied by gum recession. Thought to be caused by excessive clenching or grinding. Requires bonding when too deep.

Abscess

A pocket or sack of pus and gas produced by an infection. Painful when pressure builds up.

Abutment, Implant

The part of an implant restoration that brings the height of an implant from below to above the gumline. Allows the restoration to be attached to the implant.

Abutment Tooth

An anchor tooth for a fixed bridge.

ADA

The American Dental Association.

AHA Prophylaxis

Antibiotic premedication prescribed by the American Heart Association to protect patients with heart murmurs, mitral valve prolapse, rheumatic fever history, and other conditions from infections within the heart. See SBE.

Air Abrasion

A resurgance of an old technique whereby cavities are prepared with a device similar to a sandblaster. Such a “particle beam” works best on new fillings; old fillings and restorations are very difficult and time consuming to remove with this technique. The main advantage is that for many people, small to medium sized new cavities may be prepared without “novocaine”. The noise is also much less than from a conventional handpiece.

Alginate Impression

A quick setting impression material used to make study models and some dental appliances. Sets in about 90 seconds.

Amalgam Filling

The traditional silver filling. Actually a mixture of silver, mercury, copper, and tin. Long lasting, but expands and oxidizes over time. Can slow down the decay process. Not esthetic.

ANUG

Acute Necrotizing Ulcerative Gingivitis, commonly called trenchmouth. Rare today because of higher hygiene standards, but still seen. Causes irreversible loss of gum tissue.

Apexification

A special type of root canal treatment used on young teeth to help them to continue to grow despite damage to the nerve tissue. Requires changing an internal medicament about every 90 days and can take six to eighteen months to finish. It is generally a painless treatment.

Aphthous Ulcer

see Canker Sore.

Apicoectomy

A surgical root canal treatment used to seal the tip of a root when conventional root canal treatment has failed or is contraindicated. Usually a very straightforward treatment with quick recovery.

Autoimmune

Types of disease in which the body reacts against itself. Some types of arthritis fall into this category, as well as Sjogren’s Syndrome.


B –

Behavior Management

Techniques used to gain the cooperation and trust of fearful or obstreperous children. The ones we use are psychologically accepted and are as accepted by the American Academy of Pediatric Dentistry.

Bisque Try In

Checking the esthetics and function of a crown prior to the final finishing and glazing of the porcelain. Sometimes called a “Biscuit Bake”.

Bitewings

Dental radiographs which check for cavities in-between the teeth as well as showing the quantity and quality of bone in-between the teeth.

Bleaching

see Whitening.

Bonding

The name given to the process of placing esthetic white fillings. As different from amalgam fillings, these bonded fillings actually adhere to the tooth structure and make the tooth stronger. There is a slightly higher incidence of short term sensitivity than with silver fillings, but they are very esthetic, often indistinguishable from natural teeth.

Bone Graft

Surgical replacement of bone around tooth roots or in preparation for a dental implant. The predictability is generally good, but varies according to the particulars, and should be carefully discussed with your doctors.

Bridge, Fixed

Replacing a missing tooth by placing at least two crowns on adjacent teeth and suspending a false tooth, or pontic, in between or cantilevered from one end. This restoration is cemented to your teeth and is not removable. It is carefully crafted for esthetics, fit, comfort, and cleansibility. Depending on the size and situation, the bridge may take from two to six visits to complete. A quality provisional (temporary) bridge will be in place in-between appointments.

Bridge, Removable

see Removable Partial Denture.

Bruxism

The habit of clenching and grinding the teeth using extremes of muscle power. Often some part of the mastication system is harmed, either the muscles, the jaw joint, or the teeth. Over thirty percent of the population does this to some degree, mostly at night in deep sleep stages. People are often unaware of the habit until either signs or symptoms appear. The habit often correlates with physical or emotional stress.


C –

Calculus

The scientific term for tartar, which is the accumulation of calcified substance that adheres to the teeth. Calculus is microscopically porous, and provides a multitude of hiding places for the bacteria that cause gum disease. It should be removed on a schedule chosen specifically for the individual needs of each patient. It is the major target of your “cleanings”.

Cantilever Bridge

A fixed bridge in which the false tooth, or pontic, is supported only on one side. The supporting side, or abutments, must be especially strong and well designed, and the bite must be scientifically arranged to minimize leverage forces.

Canker Sore

A painful ulcer that lasts seven to ten days, usually on the looser gum tissue in the softer areas of the mouth. Scientifically known as aphthae, these ulcers can sometimes occur on the tongue, palate, and throat. They can be treated with steroid cream if they are debilitating. The over the counter styptic “alum” also works well.

Cap

see Crown.

Cementation

The placement of a fixed crown or bridge with a dental cement to assure retention.

Cerebral Palsy

CP is a neurologic condition caused by oxygen deficiency at some time during the development of a baby. A wide variation in the level of affliction is seen, although the condition is characterized by poor control of motor movements and overcontracted muscles. The more severely afflicted CP patients often have excessive saliva, excessive calculus, and thankfully very few problems with cavities. We find more gum care necessary for these patients than might be expected, as some of their medications also contribute to gum problems.

Cleft Lip/Palate

A common craniofacial defect in which the upper lip and nose form incorrectly during embryonic development. In antiquity, this condition was referred to as “hare lip”. Clefts cause disfigurement and misalignment of the jaws. Fortunately, in this country, almost no children are allowed to grow with this condition untreated, despite the fact that it occurs as commonly as 1 in 700 births. Dr. Groh is proud to be the co-founder of the esteemed Craniofacial Center at Miami Children’s Hospital, which specifically helps children with this problem.

Clenching

The habit of consciously or unconsciously squeezing the teeth together with extraordinary muscle force. See Bruxism.

Cold Sore

The common name for blisters cause by the Herpes Simplex virus, to which 98% of the world’s population has been exposed by the age of two. This is a different but similar virus to that which causes genital herpes. Cold sores often occur on the external lip (herpes labialis), and on the gum tissue near the teeth. They last from seven to ten days, and can be treated with antiviral medications when severe.

Compomer

A new material used for cementation of fixed crowns and bridges and also for some restorations. Combines the benefits of composite materials with those of glassionomers. We continue to look to these materials for future restorative materials in dentistry.

Composite

The material traditionally used for bonded restorations. Made from an admixture of various glass particles in a polymerized gel-like matrix. This material is generally applied to etched enamel and primed dentin. It is then polymerized with a curing light, a visible blue light which activates a catalyst in the composite and causes it to harden almost instantly. Today’s composite bonding materials are extremely esthetic because of the way the glass particles reflect and refract light similarly to natural enamel.

Computerized X Rays

see Digital X-Rays.

Core

see Foundation.

Cracked Tooth Syndrome

When a tooth has a partial or complete vertical fracture (up the root), a sometimes confusing collection of symptoms may develop. Usually characterized by pain to biting pressure or to the release of biting pressure, patients are often unable to detect which is the problematic tooth, sometimes describing pain on the entire side of the face when chewing. Cold sensitivity often accompanies these symptoms. Cracked teeth are predictably identified by good diagnostic techniques, and are treated by crowning the offending teeth to protect them and stop the pain-producing flexure around the crack. Anywhere from fifteen to forty percent of cracked teeth will eventually require root canal therapy. A small percentage of profound cracks are hopeless.

Craniofacial Team

A multidisciplinary team of health care professionals who perform a joint evaluation and build a care plan for patients with craniofacial anomalies, such as cleft lip or palate. The Craniofacial Team at Miami Children’s Hospital, for example, consists of plastic surgeons, orthodontists, reconstructive dentists, geneticists, otorhinolaryngologists(ENT’s), pediatricians, pediatric anesthesiologists, pediatric neurosurgeons, audiologists, speach pathologists, feeding and swallowing therapists, psychologists, social workers, nurse practitioners, and parent advocates who meet twice monthly to assist these worthy patients. All of the physicians and dentists donate their time to the Center.

Crepitation

Grinding or gravelly sounds from within the jaw joint resulting from direct contact of bone against bone with no disc, or cushion, in between. May be with or without associated pain.

Crown

A covering placed on a tooth to replace missing structure and reinforce or strengthen it. The most common crowns made today are from a cast metal (preferably a gold alloy) with esthetic porcelain baked to the outside. In non esthetic areas, or for patients with exremely strong masticatory musculature, gold crowns are still used and are still the most durable restorations known. Today, we also have all-porcelain crowns, with incredible esthetics (see Procera). Crowns are indicated for broken or cracked teeth, and any tooth in which the previous filling encompassed more than one-half of the width of the tooth. Crowns are also still used to solve some cosmetic problems when bonding or veneers would not be adequate. Crowns generally require two visits, and fine crafted provisional crowns are placed for the interim.

Curettage

The act of removing infected tissue from a wound; used commonly in dentistry to refer to the removal of grossly inflammed gum tissue caused be severe periodontal disease. Local anesthesia is used for immediate comfort; generally there is no pain at all afterward.

Cyst

A type of benign tumor that can form around an impacted or diseased tooth. It is filled with fluid, and can hollow out the bone in a patient’s jaw to a significant extent. Rarely do cysts spontaneously resorb in response to any treatment; in general they are removed by careful curettage and the missing bone usually regenerates.


D –

Debridement

The act of cleansing an infected area. In dentistry most often used to denote a preliminary cleaning designed to remove gross accumulations of tartar so that subsequent cleanings or root planings will be more comfortable and effective. Also used to denote a more intensive cleaning for a patient who has not recieved regular care.

Deep Cleaning or Deep Scaling

see Root Planing.

Dentin

The part of the tooth directly underneath the enamel. It is softer, contains more water, and has microscopic nerve endings. Dentin is much more susceptible to decay, abrasion from toothbrushing and bruxism, and is responsible for many sensitivity reactions when it is exposed in the mouth.

Deprogrammer

A type of bite appliance for patients with muscle pain, or myositis. It allows only the front teeth to touch, eliminates clenching and grinding for most patients, and relaxes muscles. It IS NOT for all day use; it is usually prescribed for nighttime therapy. Many studies have shown that the majority of dangerous clenching, grinding, and bruxism occurs at night in the deepest sleep stages, even in people who snore with their teeth apart in lighter sleep stages. Studies have also shown that when asleep, with inhibitory muscle reflexes decreased, people can and clench with four to five times the muscle force that they could consciously develop. Hence myositis can develop in overworked muscles, with the net effect of a “charley horse” in your jaw muscles. The deprogrammer helps to relieve these muscular symptoms.

Diabetes and Dentistry

Diabetes is a disorder in which sugars from your diet are not transported into your cells where they are needed. Over time, the disease causes defects in the smaller blood vessels. Classic diabetic problems are blindness, loss of circulation in extremities, and proclivity toward angina and heart disease. In dentistry we see delayed wound healing, periodontal (gum and bone) disease that is less responsive to aggressive therapy, and greater chance of infection after dental procedures. Most diabetics require greater attention to their home care and more frequent visits to the hygienist. Dental implant surgery has a lower success rate in diabetics, which must be understood during the treatment planning phase.

Dicor

A decade old procedure for all porcelain crowns. The strength and beauty of these crowns has now been far surpassed by Procera crowns, in our opinion.

Digital X Rays

A computer technology whereby radiographs are seen immediately after exposure on the computer screen. No developing or waiting is necessary. They can be magnified, colorized, and have their density manipulated for greater information. Most significantly, the radiation exposure necessary is about ten percent that of conventional dental radiographs, which are already quite low.

Displaced Disc

A jaw joint problem whereby the disc (meniscus), or cushion between the jaw pivot and the base of the skull, is pushed or pulled out of alignment. The displacement can include the entire disc or one edge. This condition is what causes the jaw to click or pop upon opening. It may be reversible or irreversible. One of the great controversies in dentistry, most people with this condition are free of symptoms; a few patients become victims of crippling pain and dysfunction. Women are more susceptible to painful symptoms than men, especially in the age range of 16 to 40.

Down Syndrome

Trisomy 21 is a genetic disorder that was traditionally known as Mongolism. These people have characteristic looks with slanted eyes, short fat fingers, and short stature. Some degree of mental retardation is present. The dental implications of Down Syndrome are a proclivity toward periodontal (gum and bone) disease that usually requires frequent attention as patients enter their twenties, missing and smaller teeth, and enlarged tongues that make cleaning more difficult. These people are generally excellent and lovable patients.

Doppler Auscultation

The use of a Doppler Stethoscope, greatly amplified, allows the diagnosis and interpretation of the many noises and vibrations made by diseased jaw joints. Can be used to help evaluate the extent of displaced discs.

Dry Mouth

see Xerostomia.


E –

Eagle’s Syndrome

A facial pain syndrome typified by pain upon swallowing and rapid turning of the neck. Caused by elongation of a pair of bones called the styloid processes which start at the base of the skull and point down toward the Adam’s apple. Often the pain passes with no treatment; is of extreme discomfort to patients who are getting radiation therapy to the neck.

EMG

Electromyography measures the amount of contractile or spastic activity in a muscle. Is of use in the diagnosis and treatment of many jaw joint and facial pain problems.

Enamel

The hard crystalline material that covers the outside of the tooth. The hardest substance in the human body.

Endodontic Treatment

Usually known as root canal therapy, this treatment refers to the removal of diseased or dying nerve tissue from the inside of the tooth. It does NOT mean removing a root from the tooth, and does not involve surgery. A rubber dam must be used to prevent saliva from entering the tooth. The steps of the procedure are acess (opening into the nerve chamber), debridement (removing the diseased tissue), working distance (measuring the exact length of the roots), cleaning and shaping (preparing the tooth for filling), and obturation (filling the root with an inert filling material called gutta percha). After a root canal most teeth require a foundation filling for support and a crown for strength. Root canals are about 95% successful, and are no longer the nightmare that they were in our parents’ generation. Most root canals can be completed in one visit unless started in an emergency, and are amazingly comfortable.

Etch

The act of opening microporosities in the enamel or porcelain to facilitate bonding. The technique which literally allows white fillings to “stick”.

Ernest Syndrome

A facial pain syndrome typified by spontaneous pain on the side of the face and sometimes the neck. The cause is a tendinitis of the stylomandibular ligament which attaches to the angle (corner) of the jaw. Ernest Syndrome is treated with injections of steroid and local anesthesia, as are many types of tendinitis. It is an occasional result of whiplash injuries.

Equilibration

The science of interpreting and adjusting the bite for harmony of function and relaxed musculature. A very exacting procedure, is often done on models first to avoid surprises in the individual bite. May or may not eliminate jaw joint pain and symptoms, but predictably slows or stops the progress of pathology when indicated. May need to be periodically redone or touched up to account for tooth wear and drifting.

Expert Testimony

Respected professionals are called upon to testify in legal proceedings as to deviations from standard practice and harm and damages done to patients from neglect or malpractice. Expert witnesses also interpret forensic evidence. Dr. Souviron is a much sought after expert witness in cases involving highly technical aspects of dental treatment and bite mark evidence.


F –

Fever Blister

see Cold Sore.

Fistula

A drainage spot in the gums. Referred to as a “gum boil” in the past, is a sign that infectious pus is draining into the mouth. Very often people have fistulae with no symptoms at all; however, the cause of this drainage must be addressed. We have recently reviewed a case in which pus from a dental abcess entered the lungs and caused a pulmonary abcess which killed the patient.

Fluoride

A halide element (small molecule) found commonly in water and foods. Low concentrations have been found to greatly lower the amount of cavities in our society. Fluoride’s most beneficial effect is to remineralize (reharden) areas that have just been softened by decay. A new toothpaste, Enamelon, has some extra ingredients that make this remineralization process even greater. Dr. Groh did some research with this formulation at NIH over 15 years ago and found it to be very usefull. Fluoride is also a poison to many oral bacteria and thus prevents cavities and periodontal disease. Like any medicine, it must be used carefully. Heavier concentrations have been found to create mottling or staining of tooth enamel. Most communities today add fluoride to the drinking water supply and carefully monitor its concentration for safe health improvements. Very few bottled waters contain fluoride. Additionally, fluoride is removed by many water softeners and reverse osmosis units. Most municipalities offer inexpensive analysis to check the levels of fluoride in your drinking water to test for safe but effective cavity protection. Insufficient levels can be supplemented by dentists or pediatricians with prescription fluoride drops. Fluoride is also found in most toothpastes and in the mouthrinses Fluorigard and Act. Fluoride does occur naturally in some foods, most notably in tea leaves. In hot tea, most of the fluoride boils off; “sun tea” iced tea is a good natural source of dietary fluoride.

Forensic Dentistry

The area of dentistry that assists legal and law enforcement proceedings. Forensic dentistry spans from identifying deceased persons, to identifying dental malpractice, to identifying perpetrators from bitemark evidence, to providing expert testimony in court cases. This is a dental version of “Quincy”.

Foundation

A filling done before a crown or bridge preparation. It is especially designed to be retentive in the tooth and to provide strength underneath the crown or bridge. A crown or bridge should never be placed over an old or unknown filling, as in our experience we almost always find some decay under such fillings.

Full Mouth Series

A series of dental x-rays angled to show the roots of all teeth, as well as the surrounding bone and other structures. This is the only way to examine the health of the tooth roots and to check for some types of tumors and lesions. It usually consists of about 16 to 18 small films, and for the radiation conscious, the dosage is about the same received from three hours in the summer sun. Depending on the patient’s previous history, full mouth radiographs are recommended about every three to five years. Often we alternate these with a panorex radiograph, which gives similar information but shows more structures.


G –

General Anesthesia

Going to sleep, or being”out”, for treatment. True general anesthesia is a deep state, and includes the loss of all reflexes and sometimes requires respiratory assistance. This state is rarely necessary for general dental procedures, as what even the most fearful patients want is no pain, no consciousness of the procedures, and no memory of the experience. These needs can be satisfied with IV Sedation, described below. General anesthesia is available in our practice for those that require or demand it.

Gingivoplasty

The reshaping of gum contours, often for esthetic purposes. Generally very easy and non-painful, is often a good solution for a “gummy smile”. Performed with a device very similar to a laser in function; very little inconvenience or recovery.

Gingivectomy

The removal of excess or extra gum tissue to improve cleansibility and health. Often necessary to treat gum overgrowth caused by a variety of medications, including Dilantin. Chronic mouthbreathing can also cause gum hypertrophy.

Gingivitis

The first stage of periodontal disease, characterized by inflammation of the gum tissue without any bone loss. The clinical signs are swelling and bleeding upon stimulation. Rarely are these signs noticed as a problem by patients. Many people think it is normal for gums to bleed when brushing, which is not true. Gingivitis is the result of chronic infection caused by plaque bacteria. Gingivitis is the first stage of your body’s literally trying to reject your teeth, and requires immediate treatment if it is not to progress into more destructive forms of gum disease. A person can have gingivitis and periodontitis in different parts of the mouth at the same time. See Periodontitis.

Glass Ionomer

A particularly strong filled cement. Quite impervious to water and oral fluids. Unlike most other cements, has true chemical adhesion to teeth and dental restorations. Releases fluoride to protect teeth. Used to cement crowns and bridges; also for fillings in non-stress bearing areas.

Granuloma

A zone of infected tissue that has yet to organize into an abcess. The most common cause of pain necessitating root canal therapy.

Gum Boil

see Fistula.

Gum Disease

see Periodontitis.

Gum Sculpturing

see Gingivoplasty.

Gutta Percha

A rubber-like material used to fill root canals, along with a sealer. Bio-inert and thermoplastic, it is either squeezed or injected into the prepared canal space.


H –

Handpiece

The dentist’s “drill”, usually powered by compressed air and spins up to 500,000 rpm. Used to prepare cavities for fillings, adjust bites, and a myriad of other uses.

Hare Lip

A politically incorrect and historical term for a cleft lip.

Hemisection

A surgical procedure whereby the roots of a tooth are separated and treated as individual teeth. Used when maintaining the tooth intact is impossible because of gum disease.

Hospital Dentistry

The practice of dentistry in a hospital setting, usually referring to utilizing the operating room and the diagnosis and treatment of patients with medical, behavioral, or emotional compromises.

Hot Tooth

Describes a tooth with extreme inflammation of the nerve, and often hard to numb with the usual techniques. We are especially proud of the advanced anesthesia techniques in our arsenal to comfortably treat these teeth.


I –

Impaction

A tooth that is “stuck”, or can grow no further into the mouth. Usually referrs to wisdom teeth, but any tooth can be impacted under unusual circumstances. Extra, or supernumery teeth, are often impacted. Impacted wisdom teeth have an incidence of cyst or tumor formation of around one to five percent. Partially impacted wisdom teeth (half in-half out) have a very high rate of periodontal (gum) infections. Additionally, pressure from impacted teeth can often cause damage to nearby teeth.

Implants

Artificial tooth roots that are placed into and fuse with the bone of the jaw. They can be used to replace teeth or to support and retain dentures. The placement is generally so simple as to be inconsequential. In areas where bone is lacking to support these implants, we now have ingenious and effective techniques to add bone. Teeth can be placed on the implants usually after four months; however, some of the newer systems that we have researched may be restored in as quickly as eight weeks. See our two pages on implants.

Impression

A mold, or negative, or intaglio of a tooth or teeth. Impressions are used to make crowns, bridges, veneers, dentures, some fillings, and study models. A variety of different materials are used, depending on the properties desired. The accuracy of these impressions are of penultimate importance and our patients are often impressed at the extreme care we take to assure this accuracy.

Incision and Drainage (I and D)

A technique used to allow for the drainage of significant infections. A technique thankfully infrequently necessary so long as people don’t neglect the early warning signs of dental problems, such as broken fillings and lingering sensitivities.

Inlay

A laboratory made internal filling, cemented or bonded into a tooth. Can be made of porcelain. Gold inlays are rarely used any more, although they were at one time the treatment of choice in dentistry, because they tended to put cracks in teeth. We generally find onlays a better choice for high quality, tooth-conservative dentistry. Porcelain inlays seem to have a good track record to date; Dr. Groh has two of them in his teeth.

Intraoral Camera

A miniature video camera that looks like a wand, used to diagnose and demonstrate pathology in places difficult to see in the mouth. A great way to better understand your own dental condition.

IV Sedation

An anesthetic technique sometimes referred to as “twilight sleep”, somewhat lighter than general anesthesia. Still provides memory loss and pain control, but the patient retains more physiologic function. This is the anesthesia modality of choice for most apprehensive patients, as they get the comfort and peace of mind they want wwith the fewest potential side effects.


J –

Jacket

an older term for a crown made of all porcelain.

Jaw Tracking

Computerized recording and analysis of jaw movement. Used to detect and study TMJ problems, and to check the proper design of dental reconstructions.


K –

(empty)


L –

Laser

The use of lasers for gum surgery is a viable treatment modality for some specific gum problems. It’s use on teeth themselves is still being studied, and despite the hype from the manufacturers and the media, is not a proven technology. Dental Leaders are carefully following the progress of this treatment modality and plan to incorporate it when we would have it used on ourselves! Lasers can also be used for bleaching teeth, but again the long term effects are not known.

Laughing Gas

see Nitrous Oxide.

Local Anesthesia

Medications commonly referred to as “novocaine”, although that anesthetic has not been in regular use for more than twenty years. The drugs commonly used to make teeth numb are now lidocaine, mepivocaine, bupivocaine, etidocaine, and prilocaine. Each has different strengths and weaknesses; we use each according to different indications. The medications above also are mixed with other medications, including adrenalin (epinephrine). If you have been sensitive to adrenalin in the past, please inform your dentist. It doesn’t mean that you are allergic or can’t have local anesthetic; a non-epinephrine formula can be used successfully. True allergy to local anesthetic is very rare.


M –

Malocclusion

Bad or misaligned bite.

Mandible

The lower jaw bone.

Margin

The line where a restoration seals against tooth structure. In crowns, this is usually near or below the gumline. Margins need to be sealed with extreme accuracy; if not, gum disease and recurrent cavities will result.

Maxilla

The bone of the upper jaw.

Medicated Filling

A provisional or temporary filling which incorporates a palliative or soothing medication to calm an inflamed tooth nerve.

Membrane Graft

A special technique for bone grafting which greatly increases the success rate. There are two types of membranes used, one which needs to be removed and another which slowly disolves by itself. The membranes allow bone grafts to consolidate without interference from certain types of cells.

Mesiodens

An extra tooth lodged in between the front teeth. Surprisingly common, this occurs in one out of three hundred children, and more commonly in Orientals. Diagnosing mesiodentata is a meticulous x-ray procedure; removing them is generally straight forward with few side effects.

Metal Try In

An appointment in which the metal substructure of a fixed bridge, or the metal framework of a removeable partial denture is tried in and fitted.

MRI

Magnetic Resonance Imaging, this is a radiographic technique that shows soft tissues often better than hard tissues. The images show water density instead of bone density. Its major dental use is to evaluate the condition and position of the TMJ disc.

Myositis

Muscle inflammation caused by overuse and oxygen debt. The muscle tissue can literally fill with metabolic acids, which can lead to chronic inflammation. May or may not be accompanied by muscle spasms.


N –

Night Guard

A device similar to a retainer which separates the teeth and oftens relaxes the muscles which position the jaw. A variety of configurations are used. A nightguard is indicated for people who overwork their jaws at night and possibly risk damage to their teeth, jaw joints, and/or muscles. People who wake up withsore muscles, facial weakness, or a jaw that is “locked” are good candidates for this device. Some types may also be used to diagnose jaw posture problems.

Nitrous Oxide

Also known as “laughing gas” or “sweet air”, was the first general anesthetic discovered; significantly it was discovered by a dentist, Horace Wells. It is a poor general anesthetic by any standards, but carefully administered doses are excellent at lowering patient’s anxieties. It also does increase pain tolerance to a measurable degree. It is especially useful in the management of fearful children, for whom it provides a pleasant, fantasy-like state. It is a very safe drug, with no reported allergies, and very few side effects when administered properly. Patients should note that careless dentists often administer nitrous oxide in a “cookbook” fashion, and provide safe but uncomfortably high doses of the drug. Many adults require low doses to relieve anxieties and don’t care for the higher amounts. It is not a “truth serum” and people do not misbehave under its effect.

Novocaine

see Local Anesthesia


O –

Occlusion

The science of the bite. Included are the relationship of chewing movoments to the jaw joints, and how the teeth interdigitate specifically to allow for chewing function and sometimes cause painful or dangerous dysfunction.

Occlusal Analysis and Facebow Transfer

Specific records that are made to take a patient’s particular bite and jaw movement and accurately transfer it to a bite machine called an articulator. These records can be essential in reconstructive dentistry, for implant dentistry, for large bridges, for denture work, and to diagnose and study jaw dysfunction and”TMJ”.

Odontology

A classical term for dentistry, still used in many Latin and some European countries.

OMD

Occluso-Muscular Disorder

probably 70 to 80 percent of people who have jaw pain, or “TMJ”, are better classified under this heading. OMD means a diagnosis of muscle pain caused by a malocclusion, or bad bite. Having your mouth close with your jaw joints out of alignment requires constant posturing of the jaw muscles, and those muscles can become chronically spastic, like an eternal “charley horse”. Treatment for this problem is directed at relaxing the muscles, and then correcting the occlusion if necessary.

Onlay

A tooth restoration that covers the entire biting surface. Can be gold or porcelain. Serves to protect the tooth from breakage should the cavity or old filling be too large. Classic dental excellence.


P –

Pregnancy and Dentistry
Premedication

Medicine taken before a dental appointment either to prevent infection in susceptible patients, or to attenuate the “dental experience” for anxious patients.

Primary Herpetic Gingivostomatitis

A child’s first contact with the Herpes Simplex virus, usually before the age of two. 98% of the population has this virus. First contact is accompanied by an intense fever, with a few blisters or sores in the mouth. Occasionally the child’s mouth is so painful that not even liquids will be accepted, and the child must be hospitalized to prevent dehydration.

Primer

A dentin treatment which allows it to bond to composite materials similarly to enamel.

Procera Crowns

The newest type of all porcelain crown. Less grinding of the tooth is necessary. The model of the preparation is optically scanned and modemed to Sweden, where the coping, or part that actually fits against the tooth is made. The coping is air-expressed back to our dental laboratory, where the esthetic porcelain and function are engineered to our specification. The fit on these crowns is of perfectionist quality, and the esthetics are unmatchable.

Prophy

see Prophylaxis.

Prophylaxis

A routine cleaning for healthy teeth and gums. Does not involve any type of more intensive gum therapy or deeper cleaning.

Pulp

The technical name for the “nerve” inside the tooth; actually contains a nerve, an artery, a vein, a lymphatic drainage, and some primordial cells.

Pulp Cap

Covering an exposed or nearly exposed nerve with a palliative material prior to filling the tooth.

Pulp Test

(See Vitality Test)


Q –


R –

Radiographs

Dental “x-rays” that allow for careful diagnosis of the tooth roots, the pulp, the bone surrounding the teeth, and to diagnose cavities in areas that can’t be seen inside the mouth with direct vision. The dosage of radiation is quite small compared to other types of radiographs. It would take over five hundred dental radiographs to equal the exposure recieved in one chest x-ray. A full mouth series of radiographs is about the same exposure recieved from four hours of sunshine. A panoramic radiograph is about the same exposure as only three of the small dental radiographs. Finally, the newer digital radiographs use a radiation exposure of about 10% that of conventional dental radiographs!

Recession


S –

SBE

Subacute Bacterial Endocarditis is an infection of the valve and muscle tissue inside the heart. Patients with certain conditions are prone to this type of infection and must premedicate with prescribed antibiotics prior to most dental treatments.

Sealants

A protective coating painted into the grooves on the biting surface of back teeth susceptible to decay. The ADA recommends sealants for all back teeth as soon as they grow into the mouth. Prevents cavities for adults too. Lasts for an average of seven years. Very easily placed with no discomfort.

Sensitivity

Discomfort in a tooth caused by touch, sweet, hot, cold, biting pressure, or releasing pressure. Causes differ according to the symptoms. Sometimes sensitivity passes instantly; other times the discomfort lingers for minutes or hours after the stimulation. When you have this, try to be able to characterize the symptoms as much as possible and be able to identify the offending tooth.

Shingles

see Zoster.

Sinuses

Membrane lined, air filled cavities in our skulls above our upper teeth, between our eyes, and between our eyebrows. Sinus infections are a common source of facial pain and headaches. Can be confused with pain from upper back teeth. You can have a sisnus infection and still be able to breathethrough your nose.

Sinusitis

Infection in the sinus cavities, of which we have four in our skulls. The largest of the sinuses is the maxillary sinus, located just above the roots of the upper molars. A pressure cousing infection in this area can be mistaken for tooth pain. Maxillary sinusitis is sometimes characterised by pain in the jaw or face that changes when you lean over, lay down, or stand up. It can literally cause pain with every footstep.

Sinus Lift

A special type of bone graft to augment the quantity and quality of bone available for upper dental implants. Sinus lift surgery often allows us to place implants in areas that were thought to be impossible not long ago. Depending on the situation, the sinus lift may have to be done as a separate procedure to the implant placement, and may require six months or more of healing. Smoking greatly lowers the success rate of this procedure.

Sjogren’s Syndrome

An autoimmune disease characterized by dryness of the mouth, eyes, and other mucous membranes. The dry mouth can be very uncomfortable and allow serious problems with cavities that progress quickly.

Stainless Steel Crowns

Silver colored crowns often used to restore heavily damaged baby molars. A very sturdy restoration, and the teeth are shed normally in most cases. Also used as interim restorations for adult molars when a permanent crown isn’t feasible at the time.

Study Models

Plaster models of teeth used for explanations, treatment planning, mock treatments and waxups.

Surgical Extraction

Extraction of a tooth whereby an incision and sutures are necessary, and/or the tooth is more safely and comfortably removed in pieces.

Sweet Air

see Nitrous Oxide.


T –

Tartar

see Calculus.

Trenchmouth

see ANUG.


U –


V –


W –

Wear Facet

Flat areas on teeth or restorations caused by grinding or bruxism.

Whitening

Causing the teeth to appear brighter by applying certain medicaments. Can be done at home. Not a permanent treatment, it lasts for six to twelve months, and is easily maintained or retreated.

Wisdom Tooth

see Third Molar.


X –

Xerostomia

Dry mouth, which can be caused by disease, aging, radiation therapy, and many medications.

X Rays

see Radiographs.


Y –


Z –

Zoster

A viral infection secondary to the chicken pox virus, or Varicella. Shingles, as a Zoster outbreak is called, is characterized by a painful outbreak in a well demarkated area of the body, such as one side of the palate.

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