Diploma of Primary Care Dentistry (RCSI, Ireland)

A 28-year-old patient presents with lingering pain to hot and cold in the lower left first molar. The pain persists for several minutes after the thermal stimulus is removed. Radiographically, there is deep caries extending close to the pulp chamber. What is the most likely pulpal diagnosis?

• AReversible pulpitis
• BSymptomatic irreversible pulpitis
• CAsymptomatic irreversible pulpitis
• DPulp necrosis

During a periodontal assessment, a patient exhibits generalized bleeding on probing, pocket depths ranging from 1 to 3 mm, and no clinical attachment loss (CAL). How should this condition be classified according to the 2017 World Workshop classification system?

• AGingival health on an intact periodontium
• BPlaque-induced gingivitis on an intact periodontium
• CStage I, Grade A periodontitis
• DGingivitis on a stable, reduced periodontium

Which of the following clinical techniques is most effective in minimizing polymerization shrinkage stress in deep composite resin restorations?

• APlacing the composite in a single bulk increment to ensure uniformity
• BUsing incremental placement in oblique layers to reduce the C-factor
• CIncreasing the intensity of the curing light to speed up polymerization
• DUsing a high-viscosity packable composite without a flowable liner

An 8-year-old child presents with a traumatized maxillary central incisor that is vital but has an open apex. There is an exposed pulp chamber from a complicated crown fracture that occurred 2 hours ago. Which treatment is indicated to promote root end development?

• APulpectomy followed by calcium hydroxide apexification
• BApexogenesis (partial pulpotomy)
• CDirect pulp capping with mineral trioxide aggregate (MTA)
• DImmediate root canal treatment with gutta-percha obturation

Which anatomical landmark is the primary support area for a mandibular complete denture?

• AAlveolar ridge crest
• BBuccal shelf
• CRetromolar pad
• DSublingual fossa

What is the primary mechanism of adhesion of glass ionomer cement (GIC) to tooth structure?

• AMicromechanical interlocking through resin tags
• BChemical bonding via ionic interaction with calcium ions in hydroxyapatite
• CCovalent bonding to collagen fibers in dentin
• DFrictional resistance from surface roughness

A patient experiences sudden, severe pain, localized swelling, and profuse bleeding through the root canal during instrumentation of a maxillary canine. The clinician suspects a sodium hypochlorite (NaOCl) accident. What is the immediate first-line management?

• ASuture the root canal orifice and prescribe systemic corticosteroids
• BPerform immediate surgical incision and drainage through the buccal mucosa
• CCopiously irrigate the canal with sterile saline, reassure the patient, and control pain…
• DObturate the root canal immediately to prevent further extrusion

Which clinical feature is most useful in differentiating a periodontal abscess from an acute pulpal/periapical abscess?

• APresence of localized swelling and pain
• BTooth response to pulp vitality testing
• CTenderness to percussion
• DMobility of the affected tooth

A crown preparation margin is placed 1.0 mm coronal to the alveolar crest. What is the most likely long-term periodontal consequence of this restoration?

• AGingival recession and root surface exposure
• BChronic gingival inflammation, attachment loss, and bone resorption due to biological wid…
• CFormation of a periodontal pocket without bone loss
• DHyperkeratosis of the marginal gingiva

What is the primary clinical advantage of the corrosion products formed by dental amalgam restorations over time?

• AThey increase the compressive strength of the amalgam
• BThey seal the microgap at the tooth-restoration interface, reducing microleakage
• CThey prevent the accumulation of dental plaque on the restoration surface
• DThey release fluoride to protect the surrounding enamel

A patient presents with a localized, balloon-like enlargement of the root canal space in the mid-root area of a vital maxillary central incisor. Radiographically, the margins of the lesion are smooth and sharply defined. What is the most likely diagnosis?

• AExternal inflammatory root resorption
• BInternal root resorption
• CExternal cervical resorption
• DPeriapical cemento-osseous dysplasia

A 23-year-old patient presents with severe oral pain, halitosis, and bleeding gums. Clinical examination reveals crater-like necrosis and ulceration of the interdental papillae, covered by a grayish pseudomembrane. What is the primary microbial profile associated with this condition?

• AStreptococcus mutans and Lactobacilli
• BSpirochetes and Prevotella intermedia
• CAggregatibacter actinomycetemcomitans
• DPorphyromonas gingivalis only

Which occlusal scheme describes a situation where only the canine on the working side contacts during lateral excursion, while all other teeth disocclude?

• AGroup function
• BCanine guidance (mutually protected occlusion)
• CBalanced occlusion
• DCentric occlusion

A patient presents with saucer-shaped, smooth lesions on the cervical region of the maxillary premolars. The patient has a history of high dietary intake of citrus juices. How should this tooth wear be classified?

• AAttrition
• BAbrasion
• CErosion
• DAbfraction

When preparing a root canal space to receive a post, what is the minimum length of gutta-percha apical fill that must be preserved to maintain the apical seal?

• A1 to 2 mm
• B4 to 5 mm
• C7 to 8 mm
• DNo gutta-percha is required if the post fits tightly

According to evidence-based clinical guidelines, when are systemic antibiotics indicated in the treatment of periodontal disease?

• AAs a routine adjunct for all patients undergoing scaling and root planing (SRP)
• BOnly in severe cases of necrotizing periodontal diseases, molar-incisor pattern periodont…
• CTo prevent plaque accumulation in patients with poor oral hygiene
• DIn place of scaling and root planing to minimize patient discomfort

What is the primary clinical reason for placing a tissue-conditioned liner in an immediate denture shortly after extraction?

• ATo improve the aesthetic appearance of the denture borders
• BTo cushion the extraction sites, distribute forces, and maintain retention as the ridge r…
• CTo prevent the formation of calculus on the fitting surface
• DTo accelerate the healing rate of the bony socket

What is the primary indication for performing an indirect pulp capping procedure?

• AA tooth with a vital pulp, deep caries, and signs of irreversible pulpitis
• BA tooth with a vital pulp, deep caries, no history of spontaneous pain, and a close pulpa…
• CA non-vital tooth with a periapical lesion
• DA vital tooth with a large pulpal exposure from trauma

During rotary endodontic preparation of a curved canal, a nickel-titanium (NiTi) file separates. The file was not bound in the canal but had been used in several curved canals. What was the most likely mechanism of file separation?

• ATorsional fatigue
• BCyclic fatigue
• CCorrosion fatigue
• DHydrogen embrittlement

Which component of a three-step total-etch (fourth-generation) dentin bonding agent is primarily responsible for converting a hydrophilic dentin surface into a hydrophobic surface ready for resin bonding?

• AAcid etchant (phosphoric acid)
• BPrimer (hydrophilic monomer like HEMA)
• CAdhesive (hydrophobic monomer like Bis-GMA)
• DSolvent (acetone or alcohol)

According to the International Caries Detection and Assessment System (ICDAS), how is a code 2 lesion described clinically?

• ANo radiographic or clinical evidence of caries
• BFirst visual change in enamel observed only after prolonged air drying
• CDistinct visual change in enamel observed on a wet tooth surface
• DLocalized enamel breakdown with no visible dentin

A 9-year-old child presents with asymmetrical, well-demarcated opaque white-yellow patches on the enamel of all four permanent first molars, with some enamel breakdown. The permanent central incisors show mild white patches. What is the most likely diagnosis?

• AFluorosis
• BAmelogenesis imperfecta
• CMolar incisor hypomineralisation (MIH)
• DTurner's hypoplasia

An 18-month-old child presents after a fall 1 hour ago. Clinical examination reveals that the primary maxillary right central incisor has been intruded by 4 mm into the alveolar bone. The root is inclined labially away from the permanent tooth germ. What is the recommended management?

• AImmediate surgical repositioning and splinting
• BExtraction of the intruded tooth
• CObservation to allow for spontaneous re-eruption
• DRepositioning with orthodontic traction

A patient in her second trimester of pregnancy requires dental treatment. What is the recommended positioning of the patient in the dental chair to avoid supine hypotensive syndrome?

• AFully supine position
• BTrendelenburg position (head lower than feet)
• CSemi-reclined with a small pillow under the right hip to tilt her to the left
• DProne position

Which clinical feature is characteristic of mild dental fluorosis?

• ASevere pitting and brownish staining of the enamel
• BPunched-out localized enamel defects on a single tooth
• CSymmetrical, diffuse paper-white opacities covering less than 50% of the tooth surface
• DComplete absence of enamel on all teeth

Which of the following craniofacial and dental anomalies is most commonly associated with patients who have Down syndrome (Trisomy 21)?

• AMicrodontia, oligodontia, and delayed tooth eruption
• BMacrodontia, supernumerary teeth, and accelerated tooth eruption
• CAmelogenesis imperfecta and cleft lip only
• DMandibular hypoplasia and severe open bite only

An active 5-year-old child presents with the premature loss of the primary mandibular first molar due to caries. The primary second molar is intact. Which space maintainer is indicated?

• ADistal shoe space maintainer
• BBand and loop space maintainer
• CNance appliance
• DLower lingual holding arch

For a patient classified as having a high risk of developing dental caries, what is the recommended frequency for applying fluoride varnish (5% NaF) according to evidence-based preventive guidelines?

• AOnce every 12 months
• BOnce every 6 months
• CEvery 3 to 4 months (3-4 times a year)
• DDaily application at home

A 35-year-old patient presents with generalized tooth sensitivity. Clinical examination reveals loss of enamel on the palatal surfaces of the maxillary anterior teeth, with rounded margins and proud composite restorations. The patient denies eating a highly acidic diet. What is the most likely cause of this tooth wear?

• AOccupational acid exposure
• BIntrinsic erosion from gastroesophageal reflux disease (GERD) or bulimia
• CAggressive horizontal toothbrushing
• DNocturnal bruxism

An 11-year-old patient exhibits a palpable bulge on the palatal aspect of the maxillary alveolar ridge, and the primary maxillary canine is retained. Radiographs show the permanent canine is impacted palatally, with its crown overlapping less than half of the root of the adjacent lateral incisor. What is the first-line interceptive treatment of choice?

• ASurgical exposure of the canine followed by immediate orthodontic traction
• BExtraction of the retained primary maxillary canine
• CSurgical removal of the impacted permanent canine to prevent root resorption
• DObservation until the age of 16 to allow spontaneous eruption

At what stage of dental development is autogenous tooth transplantation (e.g., transplanting a premolar to replace a lost central incisor) associated with the highest rate of long-term success?

• AWhen the donor tooth has a completed root with a closed apex
• BWhen the donor tooth root development is at two-thirds to three-quarters of its final len…
• CBefore any root development has commenced on the donor tooth
• DOnly after the donor tooth has erupted into functional occlusion

Which of the following describes the behavior management technique of 'Tell-Show-Do'?

• AInstructing the parent to explain the procedure to the child prior to the appointment
• BVerbal explanation of the procedure in age-appropriate terms, demonstration of the instru…
• CProviding a rewards system where the child is shown toys before the treatment starts
• DUsing a loud voice to command compliance, showing the handpiece, then performing the proc…

A patient presents with an occlusion characterized by a bilateral Class II molar relationship, proclined maxillary central incisors, and an increased overjet of 8 mm. According to Angle's classification system, how is this malocclusion classified?

• AClass II division 1
• BClass II division 2
• CClass I with bimaxillary protrusion
• DClass III malocclusion

When assessing a patient's diet as part of a caries prevention plan, which factor is most critical in promoting enamel demineralization?

• AThe total amount of carbohydrate consumed daily
• BThe frequency of free sugar intake throughout the day
• CThe consumption of complex starches at meal times
• DThe intake of calcium-rich dairy foods

An 8-year-old child avulses his permanent maxillary central incisor at school. The teacher immediately rinses the tooth with cold water and replants it within 20 minutes. What storage medium would have been the best alternative if immediate replantation was not possible?

• ATap water
• BHank's Balanced Salt Solution (HBSS) or cold milk
• CDry tissue paper in a plastic bag
• DAlcohol disinfectant

An 8-year-old patient presents with a localized anterior crossbite involving the maxillary central incisors, which are in eruption. There is sufficient arch length available. What is the primary interceptive treatment?

• AExtraction of the permanent maxillary incisors
• BRemovable upper appliance with a posterior biteplane and a double cantilever (Z-spring)
• CComprehensive multi-bracket fixed orthodontic therapy
• DObservation until all permanent teeth erupt at age 12

When treating a patient with autism spectrum disorder (ASD) in a primary care dental clinic, which adjustment is most effective in reducing patient anxiety?

• AUsing sudden loud noises to distract the patient
• BMaintaining a quiet, structured environment with predictable routines and utilizing visua…
• CCompleting all treatment in a single, high-speed appointment without explanation
• DHaving multiple staff members enter and exit the room during the procedure

Which radiographic examination is the method of choice for detecting proximal dental caries in posterior teeth?

• APanoramic radiograph
• BPeriapical radiograph using the bisecting angle technique
• CBitewing radiograph
• DOcclusal radiograph

In which clinical scenario is a vertical bitewing radiograph indicated over a standard horizontal bitewing?

• AWhen evaluating occlusal caries in erupting permanent molars
• BIn patients with moderate to advanced periodontal bone loss to capture the alveolar crest…
• CFor routine caries screening in a pediatric patient
• DTo assess the root canal morphology of a maxillary canine

What is the primary radiological benefit of using a rectangular collimator instead of a round collimator during dental radiography?

• AIt improves the contrast of the radiographic image
• BIt reduces the radiation dose to the patient by up to 50%
• CIt makes alignment of the X-ray tube head easier for the operator
• DIt increases the magnification of the image

Which principle of radiation protection states that all exposure to radiation must be kept as low as reasonably achievable, economic and societal factors being taken into account?

• AJustification
• BLimitation
• COptimization (ALARA/ALADA)
• DShielding

What is the primary radiological advantage of the paralleling technique over the bisecting angle technique for intraoral radiography?

• AIt requires less space in the oral cavity, improving patient comfort
• BIt produces images with minimal dimensional distortion and better reproducibility
• CIt does not require the use of a film holding device
• DIt requires a shorter exposure time

On a panoramic radiograph, the anterior teeth appear narrow and blurred, and the spine is superimposed on the ramus. What positioning error occurred during patient setup?

• AThe patient's chin was tilted too high
• BThe patient was positioned too far forward in the focal trough
• CThe patient was positioned too far backward in the focal trough
• DThe patient's head was rotated to the left

According to professional selection criteria, in which clinical scenario is a Cone Beam Computed Tomography (CBCT) scan justified in primary dental care?

• ARoutine screening for dental caries in high-risk adult patients
• BAssessment of lower third molar root relationship to the inferior alveolar canal when con…
• CStandard evaluation of bone levels in patients with generalized chronic periodontitis
• DRoutine orthodontic planning for simple Class I crowding cases

Which of the following is a characteristic of stochastic effects of ionizing radiation?

• AThe severity of the effect is proportional to the dose received
• BThere is a threshold dose below which the effect does not occur
• CThe probability of the effect occurring increases with dose, but the severity does not ch…
• DThey occur only at high doses of radiation, such as in radiation therapy

A radiograph reveals bone loss where the alveolar crest is located 4 mm apical to the cementoenamel junction of adjacent teeth, and the crest remains parallel to a line connecting the CEJs. How is this periodontal bone loss described?

• AVertical (angular) bone loss
• BHorizontal bone loss
• CInfrabony defect
• DFurcation involvement