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NDAEB Practice Questions
Who was the first woman to graduate from a recognized dental college? - correct answer Lucy B. Hobbs-Taylor What are the conditions that would indicate the need for restorative dentistry? - correct answer - initial or recurring decay
- replacement or failed restorations
- abrasion or wearing away of tooth structure True or False: Aesthetic dentistry is primarily devoted to improving the appearance of teeth; specific conditions that indicate a need for aesthetic treatment include the replacement of a partial denture. - correct answer False The process of removing unhealthy tooth structure while leaving a limited amount of healthy structure for the tooth to maintain a restoration is known as cavity preparation. This process involves which of the following steps? - correct answer - initial preparation
- outline, resistance, retention, convenience form
- final preparation Responsibilities of the dental assistant in the restorative process can include performing expanded function and maintaining patient control. - correct answer True Class II restorations are found on the.... - correct answer Posterior teeth The usual material of choice for class III and Class IV restorations is ... - correct answer Composite Resin The Class V restoration is classified as a smooth surface filling and can be found on the... - correct answer - incisors
- canines
- premolars When are retention pins used as a part of the direct restorative process? - correct answer - when decay has extended beyond the normal size and shape of the cavity preparation
- when a stronger system for retaining and supporting the restoration is needed
- when one or more cusps of the tooth is missing A veneer is a thin layer of tooth-coloured material that is placed on the facial surface of a prepared tooth and is used for: - correct answer - improving appearance of teeth that are abraded, eroded or discoloured
- closing a diastema
- improving alignment of teeth When is tooth whitening or vital bleaching not indicated for a dental patient? - correct answer when the patient presents with severe tetracycline and fluorosis stains A matrix must be used to create a temporary wall for which of the following classifications of tooth restoration? - correct answer Class II, III, and V The most common matrix system used for class II posterior restorations is the... - correct answer tofflemire retainer and matrix band The universal/Tofflemire retainer holds the matrix band snugly in position and is most often positioned... - correct answer on the buccal surface of the tooth being restored The class II restoration requires a matrix band to act as an artificial wall that must make proper contact with the adjacent tooth; this is accomplished by... - correct answer - using a wedge
- contouring the centre of the matrix band in the proximal contact area
- the dentists design of the inter proximal cavity preparation
Sealants have been proved an effective way to prevent the development of dental caries and are indicated: - correct answer - through the caries-active period (ages 6-15)
- for teeth with deep pits & fissures
- for some adults Sealants shouldn't be used in which of the following situations: - correct answer - obvious dental decay or proximal surface decay
- primary teeth that will be lost soon
- poor patient cooperation in the dental chair or lack of pits & fissures Sealants may vary in: - correct answer - method of polymerization
- colour
- whether they contain fillers A general tip for sealant materials is to store them in a refrigerator: - correct answer False The first step in placing dental sealants is to: - correct answer clean the surface A sealant that is polymerized by chemical reactions is called: - correct answer Self- Cured Self-Cured sealant materials are supplied as a two-part system that includes: - correct answer - a base
- a catalyst Dental sealants should be used as part of a preventative program that includes: - correct answer - fluorides
- dietary considerations
- plaque control
Enamel that has been etched has the appearance of being: - correct answer frosty Antidepressants are often used in dentistry to alleviate or reduce anxiety and pain - correct answer False The agents that provide a temporary numbing effect on nerve endings located on the surface of the oral mucosa are: - correct answer Topical Anesthetics Topical anesthesia is available in the form of: - correct answer - ointments & liquids
- sprays
- patches The most frequently used form of pain control used in dentistry is: - correct answer Local Anesthesia ______ is added to local anesthetic agent to slow down the intake of the agent and increase the duration of action - correct answer Vasoconstrictor The ____ the ratio, the higher the percentage of vasoconstrictor in the anesthetic agent - correct answer Smaller Patients with a hx of heart conditions such as angina, recent heart attack, recent coronary artery bypass surgery, severe hypertension, and untreated or uncontrolled CHF should always use a local anesthetic with a vasoconstrictor - correct answer False The time from when the local anesthetic takes complete effect until the complete reversal of anesthesia is the ___ of the anesthetic agent - correct answer duration A short-acting local anesthetic agent can last from: - correct answer 60 - 180 minutes
Parathesia, the condition in which numbness lasts after the effects of the local anesthetic solutions should have worn off, may be caused by: - correct answer - contaminated anesthetic solution
- trauma/injury to nerve sheath during injection or surgery
- hemorrhage into/around nerve sheath Nitrous Oxide/Oxygen analgesia use in dentistry dates back to 1844 and is also known as: - correct answer Inhalation sedation An advantage of using nitrous oxide/oxygen is that it is relatively simple to administer and easy to manage.. - correct answer True No absolute medical contraindications exist for N2O/O2 analgesia, but certain conditions make it a poor choice for some patients - correct answer True Which of the following must be used to protect dental personnel from the occupational risks of nitrous oxide by reducing the N2O released into the treatment room? - correct answer - Scavenger System
- Patient mask that fits well and doesn't leak Nitrous oxide oxygen administration always begins and ends with: - correct answer the patient breathing 100% O In the dental office, sedatives may be used: - correct answer - for a very nervous patient
- for a procedure that will be long or difficult
- for a mentally challenged patient A DA can start, monitor and remove IV sedation for a dental patient.. - correct answer False General Anesthesia is most safely administered in: - correct answer the hospital
The different levels of consciousness and unconsciousness are referred to as stages of anesthesia; these stages include: - correct answer - Stage 1 (anesthesia)
- Stage 2 (excitement)
- Stage 3 (general anesthesia) Documentation records of pain & anxiety analgesia may include: - correct answer - review of patients health hx
- time anesthesia began & ended
- adverse events or pt complaints The most important way to prevent a medical emergency is to be sure the pt has _____ before tx has begun. - correct answer completed/updated medical hx Who is responsible for providing care if a medical emergency involving a patient takes place in the dental office? - correct answer - dentist
- DA
- office staff Every staff member should have an assigned role in an emergency situation & staff members should practice their specific roles once a month before an emergency arises.. - correct answer True The list of emergency phone numbers posted next to each phone throughout the office should include: - correct answer - police/firefighters
- ems
- nearest hospital, physicians, oral surgeons A medical emergency can happen at any time, so it is important for the DA to: - correct answer be alert and continuously observe pt to watch for problems A(n) _______ is what a pt tells you regarding how they feel or what they are experiencing; a ______ is what you or the dentist observe in a pt.. - correct answer Symptom; Sign
When assessing a medical emergency, the DA should remember that the physical changes observed can include: - correct answer - unconsciousness
- convulsions
- respiratory distress A reduction in blood flow to the brain that would cause the pt to lose consciousness is called: - correct answer Syncope/Fainting Treatment for Syncope may include: - correct answer - ammonia inhalant
- placing pt in a sub-supine position
- calling 911 Symptoms of an acute myocardial infarction include: - correct answer - short of breath
- nausea/vomiting
- mildi-severe chest pain _______, which is precipitated by stress & anxiety, may manifest in rapid & shallow breathing, lightheadedness, rapid heartbeat and a panic-stricken appearance and is treated by having the pt breathe into a paper bag or cupped hands? - correct answer Hyperventilation Anaphylaxis can be life threatening and the signs and symptoms include: - correct answer - nausea/vomiting
- loss of consciousness
- shortness of breath A medical emergency in the dental office must be documented with all of the pertinent details (including extensive notes about what happened, tx provided, and pt's condition when they left the office), and a report must be filed with the local EMS.. - correct answer False The study of oral pathology is important for the dental assistant: - correct answer to recognize the difference between normal and abnormal conditions
The dentist must consider many sources of information when making a final diagnosis. The sources include: - correct answer - historical, clinical & radiographic
- laboratory, surgical & therapeutic
- microscopic & differential findings A broad term for abnormal tissues in the oral cavity is: - correct answer a lesion Which of the following types of lesions extends above the mucosal surface? - correct answer Blister A benign tumor is: - correct answer - not life threatening
- a neoplasm A general term that literally means "white patch" is: - correct answer Leukoplakia The common term for aphthous ulcer is: - correct answer a canker sore _______ is the general term used to describe inflammation & changes to the tongue.
- correct answer Glossitis Warning signs of oral cancer include: - correct answer - any sore in the mouth that doesn't heal
- numbness in or around the oral cavity
- white or rough-textured lesions on the lips or oral cavity Smokeless tobacco presents a serious health hazard because users may have: - correct answer - high rates of periodontal disease & tooth loss
- precancerous leukoplakia
- 400 - 500 times more cancers of the pharynx, larynx & esophagus
A ______ is a narrow fold of mucous membrane passing from a more fixed to a movable part. - correct answer Frenum The corners of the lips are called the: - correct answer Commissures The ______ is/are body spicules in cancellous bone that form a meshwork of intercommunicating spaces that are filled with bone marrow. - correct answer Trabeculae The filiform papillae, which cover the surface of the tongue, are the receptors of: - correct answer Touch The term ______ means toward the cheek: - correct answer Buccal Ectoderm differentiates into: - correct answer - skin
- lining of the oral cavity The periodontal ligament is capable of: - correct answer - Remodelling
- Resorption The innermost area of the tooth is the: - correct answer pulp chamber Dentin: - correct answer - is capable of regeneration
- is an excellent thermal conductor
- forms the bulk of the tooth The hardest calcified substance in the body is: - correct answer Enamel Healthy gingiva attaches to the teeth on the enamel surface just above the cervical line of the tooth. This is known as the _____ attachment - correct answer Epithelial
The _______ are the enamel-producing cells. - correct answer Ameloblasts The compact bone that lines the tooth socket is known as the: - correct answer Lamina Dura The _____ is a pear-shaped structure formed by dense connective tissue & located directly posterior to the maxillary central incisors. - correct answer Incisive Papilla A healthy _____, which is the space between the free gingiva and the tooth, rarely exceeds 2-3 mm in depth. - correct answer Gingival Sulcus The earliest signs of tooth development appear: - correct answer During the 1st Trimester The structure units of enamel are called enamel _______: - correct answer Prisms The primary purpose of _______, the fibre group of the periodontal ligament, is to aid in resisting tipping & twisting of the tooth. - correct answer Interradicular The _____ is the extension of bone that supports the teeth in their functional positions. - correct answer Alveolar Process The ______ is the constricted area where the anatomic crown and the tooth of the tooth meet. - correct answer Cervix The process through which the tooth comes into the oral cavity and tries to maintain occlusions is known as: - correct answer Eruption That portion of the tooth that is visible in the mouth is known as the _____ crown of the tooth: - correct answer Clinical
The junction of _____ surfaces forms a point angle. - correct answer Three If a tooth has an inadequate contour, the gingiva may be damaged. - correct answer True The height of contour is the: - correct answer Bulge or widest point on a specific surface of the crown An embrasure may diverge in which direction(s)? - correct answer - facially
- occlusally
- apically The term to describe the condition when there is maximal stable contact between the occluding surfaces of the maxillary and mandibular teeth is: - correct answer Centric Occlusion The normal spaces between the primary teeth are called: - correct answer Primate Space How many teeth are in the primary dentition? - correct answer 20 The cusp of Carabelli is found on which teeth? - correct answer Maxillary 1st Molars At approximately what age is the last primary tooth shed? - correct answer 12 There are no premolars in the primary dentition. - correct answer True The lobe on the lingual surface of a permanent incisor is called a(n) - correct answer Cingulum How many molars are in the permanent dentition? - correct answer 12
A tooth that has three well-separated and well-developed roots is termed: - correct answer Trifurcated In general, third molars are larger in size than any other molar. - correct answer False The numbering system that uses numbers 1-31 is the _________ system. - correct answer Universal The numbering system in which the first digit indicates the quadrant and the second number indicates the tooth is the _______ system. - correct answer Federation Dentaire International Numbering System (FDI) The labial commissure is the: - correct answer angle at the corner of the mouth where the upper and lower lips join It is important to protect the lips with sunscreen because sun exposure increases the risk of cancerous changes. - correct answer True Fordyce's spots or granules are: - correct answer - normal variations that sometimes appear on the buccal mucosa
- small yellowish elevations The interdental gingiva is also known as: - correct answer Gingival Papilla Which of the following are functions of the tongue? - correct answer - speech
- cleansing of the oral cavity
- taste
- swallowing The receptors for the taste of sweet are located: - correct answer on the tip of the tongue
Zinc oxide-eugenol cement can be used as a: - correct answer - temporary cement
- sedative base When mixing the dental cements, the powder to liquid ratio depends on the: - correct answer Intended use of the material When ready for use, properly mixed polycarboxylate cement should appear: - correct answer Glossy A restoration of IRM can last up to: - correct answer Several months A(n) ______ base is placed to soothe the pulp that has been irritated by decay, injury, or the trauma of the cavity preparation. - correct answer Sedative Type ____ zinc phosphate cement is designed for the accurate seating of precision castings. - correct answer 1 To provide a better adhesion of material to tooth structure, the dentist may select ______ for the tooth preparation. - correct answer a conditioner/etchant The calcium hydroxide cavity liner is mixed with a(n): - correct answer - ball-shaped applicator
- spatula After mixing permanent cement, the spatial and glass slab should be: - correct answer cleaned immediately with a wet gauze sponge and disinfected When you are preparing a crown for temporary cementation, you should: - correct answer completely fill the crown with cement Zinc Phosphate cement is used: - correct answer as a luting agent for permanent restorations
Cavity varnish is placed ____ the liner or insulating base - correct answer Over Glass ionomer capsules are mixed: - correct answer by mechanical trituration When mixing zinc phosphate cement, a cool, dry slab will _______ the setting time. - correct answer Decrease __________ cement bonds directly with enamel, dentin, and metallic materials. - correct answer Glass Ionomer Exothermic means to _________ heat. - correct answer Give off ________ may be used under all types of restorative materials. - correct answer Calcium Hydroxide The ability of a liquid to flow is described in terms of its: - correct answer Viscosity In areas where strength is the primary concern, a ________ composite would be selected. - correct answer Macrofilled When two metals touch in the mouth, a small shock is created. This is known as: - correct answer Galvanic action Before dentin bonding, the smear layer must be: - correct answer Removed Bonding system materials: - correct answer must be used according to manufacturer's instructions Crushing pressure that pushes a material together is applied by: - correct answer Compressive Stress The centric relationship of the upper and lower arches is obtained in the ________ registration. - correct answer Bite & Occlusal
