NDAEB Practice

NDAEB Practice Questions Complete Solutions Who was the first woman to graduate from a recognized dental college? Lucy B. Hobbs-Taylor What are the conditions that would indicate the need for restorative dentistry? - 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. 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? - 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. True Class II restorations are found on the.... Posterior teeth The usual material of choice for class III and Class IV restorations is ... Composite Resin The Class V restoration is classified as a smooth surface filling and can be found on the... - incisors - canines - premolars When are retention pins used as a part of the direct restorative process? - 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: - 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? 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? Class II, III, and V The most common matrix system used for class II posterior restorations is the... tofflemire retainer and matrix band The universal/Tofflemire retainer holds the matrix band snugly in position and is most often positioned... 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... - using a wedge - contouring the centre of the matrix band in the proximal contact area - the dentists design of the inter proximal cavity preparation The matrix is used for anterior CR or GI restorations... Clear Plastic Coronal Polishing is a technique used: - to remove plaque and stains from coronal surfaces of the teeth - before placement of dental sealants and orthodontic bands - before placement of the dental dam and before acid etching Patients at high risk for caries or with areas of thin demineralized enamel are contraindications for coronal polishing True Coronal polishing is the complete removal of calculus, debris, stains and plaque from the teeth False Exogenous stains are caused by an environmental source and are classified into subdivisions, including which of the following: - Intrinsic stains - Extrinsic stains Extrinsic stains can be removed from the teeth by: - air-powder polishing - rubber cup polishing - bristle brushes The ultrasonic scaler is needed for a coronal polish... False Disclosing solution can be used for: - identifying areas of plaque - evaluating the effectiveness of the polishing Teeth with very small initial carious lesions may be sealed, and the bacteria will not survive under a properly placed sealant True Sealants have been proved an effective way to prevent the development of dental caries and are indicated: - 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: - 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: - method of polymerization - colour - whether they contain fillers A general tip for sealant materials is to store them in a refrigerator: False The first step in placing dental sealants is to: clean the surface A sealant that is polymerized by chemical reactions is called: Self-Cured Self-Cured sealant materials are supplied as a two-part system that includes: - a base