Block 4 Flashcards
Several specialised instruments are used during a pulpectomy procedure. Which one of the following is used to extirpate the pulp contents? Barbed broach Gates Glidden drill Hand file Lateral condenser Rotary paste filler
Barbed broach
The barbs along the broach catch into the pulp tissue and remove it as the instrument is withdrawn from the canal – this is called extirpation.
During a restorative procedure the pulp chamber receives a small breach. Which one of the following procedures is most likely to be carried out? Apicectomy Open apex root filling Pulp capping Pulpectomy Pulpotomy
Pulp capping.
Pulp capping a small breach gives the tooth the best chance of remaining vital, and tooth vitality should always be preserved whenever possible.
Several specialised instruments are used during a pulpectomy procedure. Which of the following is used during obturation of the root canal? Barbed broach Finger spreader Gates Glidden drill Hand file Hand reamer
Finger spreader.
Obturation is the packing and condensing of the root canal with gutta percha.
Abfraction is a recognised type of non-carious tooth surface loss. Which cavity classification does this lesion present as? Class I Class II Class III Class IV Class V
Class V
Zinc oxide and eugenol cement is a versatile dental material. Which one of the following is not one of its recognised uses? Impression paste Luting cement Periodontal dressing Root-filling paste Sedative dressing
Luting cement
The cement has no adhesive properties to act as a luting cement.
A patient is to undergo the placement of a composite filling into a class III cavity. Which of the following best describes the shape of this cavity in a tooth? Cervical of canine Distal-buccal of molar Distal-occlusal of premolar Mesial and incisal edge of incisor Mesial-palatal of incisor
Mesial-palatal of incisor.
Class III cavities involve a mesial or distal surface of a canine or incisor, with or without an extension, but not involving the incisal edge.
What is systemic fluoride?
Ingested and incorporated into the tooth from within. E.g. in from the Fluoridated public water supply at one part per million.
What is topical fluoride?
Applied externally to the tooth e.g. toothpaste or gel.
What oral disease does plaque, food debris and refined carbohydrates form?
Caries
What oral disease does plaque and food debris form?
Periodontal disease
What is an advantage of delivering fluoride?
Helps prevent tooth decay
Why are interdental aids used to help prevent oral disease?
Reduces inter proximal caries
What is a disadvantage of composite restorative material?
Strict moisture control
What is an advantage of amalgam restorative material?
Strength
Which of the following is the most effective method for delivering oral health messages? Texting, Using the internet, Word of mouth Demonstration
Demonstrations
Various types of tooth surface loss are well recognised. Which is caused by vigorous tooth brushing?
Abrasion
What is a gelatin sponge?
Haemostatic device
What is oxidised cellulose?
Absorbable knitted fabric
Which of the following is a pre-constructed restoration? Amalgam filling
Glass ionomer filling
Composite filling
Porcelain inlay
Porcelain Inlay
What is a function of a suture?
Closes the incision site
What is a function of topical anaesthetic?
Numbs the surface of the application site
What is the purpose of irrigating during extractions?
To disinfect the area
Which of the following components of saliva are white blood cells? Ptyalin Antibodies Leucocytes Inorganic ions and minerals
Leucocytes
Which component of saliva protects against caries but allows dental calculus to form easily? Ptyalin Antibodies Leucocytes Inorganic ions and minerals
Ptyalin
What type of material is alginate?
Irreversible hydro-colloid
What orthodontic device specifically uses the oral musculature to allow controlled movement of the mandible?
Functional appliance
What may indicate gingivitis?
False pockets
Grade 2 tooth mobility is:
Side to side movement more than 2mm
The vertical distance between the incisal edge of the upper and lower anterior teeth is known as:
Overbite
Which of the following is the consequence of advanced periodontal disease? False pocket Mobility True pocket Apical Abscess
Mobility
What is the natural ph within the mouth?
7.0
What medicine is used to treat ANUG?
Metronidazole
How long does it take for saliva to buffer the affect of the acid in the mouth?
Between 20 minutes and 2 hours.
Which type of bridge does the following describe? “Where the retaining teeth are to one side of the pontic only.”
Cantilever bridge
When there are no teeth left in a jaw it is said to be…?
Edentulous
The surgical removal and smoothing of ridges to allow the comfortable wearing of a denture is called?
Alveolectomy
What has to occur after an implant has been placed for it to be successful?
Osseointegration
Which is the only food group that can be turned into acid by bacteria and therefore cause caries?
Carbohydrate
Which naturally occurring sugars produce so little organic acid that they are considered harmless to teeth?
Intrinsic sugars (found naturally in foods) - Fructose Milk extrinsic sugars - lactose
The initial acid attack where a microscopic layer of enamel is dissolved away is known as what?
Demineralisation
After a meal, when the PH level has been restored to 7 and there is no more sugar present in the plaque, some natural healing takes place. What is this known as?
Remineralisation
What do very early acid attacks show as on the enamel surface?
White spot lesions
Areas of repair due to demineralisation followed by remineralisation often show as what on the teeth?
Brown lesions
What can occur when caries extends through the dentine to the pulp?
Pulpitis
How should Elastomer impressions be stored once the impression has been disinfected?
Dried and sealed in an air tight bag
Which ethnic group commonly eats more dairy products than many other groups?
Sikhs
Which of the following general health problems affects the oral soft tissues and makes patients prone to postoperative complications? Anorexia nervosa Diabetes Alcoholism Bulimia
Diabetes
Which injection is given directly through the outer cortical plate of the jaw?
Intraosseous
According to Black’s classification, cavities involving the mesial or distal surface of an incisor or canine are which class?
Class III
According to Black’s classification, cavities involving the cervical margin of any tooth are which class?
Class V
Self-tapping dentine pins are a method of filling retention - which type of filling is this method used with?
Amalgam
Air turbine (high speed hand pieces run at up to how many revolutions per minute?
500,000
Burs for high speed hand pieces have either diamond cutting surfaces, or which of the following? Steel Titanium Tungsten Carbide All of the above
Tungsten Carbide
Which of the following temporary restorative materials is an alternative to zinc phosphate in most applications? Zinc oxide and Eugenol Glass ionomer Cavit Zinc polycarboxylate
Zinc polycarboxylate
During periodontal flap surgery, which instrument is used to hold the flap edges taut during suturing?
Dissecting forceps
During gingivectomy, what material covers the raw area following the removal of incised gingivae?
Zinc oxide/Eugenol pack
Which instrument would be used during endodontic treatment to spin sealant material into the root canal?
Spiral paste filler
Performed acrylic, polycarbonate or cold cure acrylic are all construction materials used for which fixed prosthesis?
Temporary Crown
When mixing polyester resin which mixing method should be used?
Wax pad and spatula
