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BDS Preventive Dentistry Syllabus

The Preventive Dentistry syllabus for BDS in full: 8 chapters, 20 topics and 57 sub-topics, every one listed below, plus 51 Preventive Dentistry flashcards with answers.

8Chapters
20Topics
57Sub-topics
51Flashcards

Preventive Dentistry syllabus: all 8 chapters

Expand any chapter to see its topics and sub-topics.

  1. Introduction to Preventive Dentistry

     2 topics
    • Definition and Scope
      • Historical Background
      • Importance in Public Health
      • Objectives of Preventive Dentistry
    • Levels of Prevention
      • Primary Prevention
      • Secondary Prevention
      • Tertiary Prevention

  2. Oral Health Promotion

     3 topics
    • Health Education
      • Principles of Health Education
      • Methods of Health Education
      • Evaluation of Health Education Programs
    • Community Water Fluoridation
      • History and Development
      • Mechanism of Action
      • Benefits and Risks
      • Controversies and Misconceptions
    • School Dental Health Programs
      • Components of School Dental Programs
      • Implementation Strategies
      • Evaluation and Outcomes

  3. Preventive Measures for Dental Caries

     3 topics
    • Fluoride Therapy
      • Systemic Fluoride
      • Topical Fluoride
      • Fluoride Varnishes and Gels
      • Fluoride Toxicity
    • Pit and Fissure Sealants
      • Indications and Contraindications
      • Application Techniques
      • Effectiveness and Longevity
    • Dietary Modifications
      • Role of Sugars in Caries Formation
      • Dietary Counseling
      • Alternative Sweeteners

  4. Preventive Measures for Periodontal Diseases

     2 topics
    • Plaque Control
      • Mechanical Plaque Control
      • Chemical Plaque Control
      • Plaque Control Programs
    • Gingival Health
      • Gingival Diseases
      • Preventive Strategies
      • Gingival Health in Special Populations

  5. Preventive Orthodontics

     2 topics
    • Early Detection and Intervention
      • Growth and Development Assessment
      • Space Maintainers
      • Habit Control Appliances
    • Interceptive Orthodontics
      • Indications and Techniques
      • Outcomes and Follow-up

  6. Preventive Measures for Oral Cancer

     3 topics
    • Risk Factors
      • Tobacco Use
      • Alcohol Consumption
      • HPV and Other Infections
    • Early Detection and Screening
      • Screening Techniques
      • Public Awareness Programs
      • Professional Training
    • Preventive Strategies
      • Tobacco Cessation Programs
      • Vaccination Programs
      • Diet and Lifestyle Modifications

  7. Preventive Measures for Dental Trauma

     2 topics
    • Risk Assessment
      • Identifying High-Risk Individuals
      • Environmental Risk Factors
    • Preventive Strategies
      • Use of Mouthguards
      • Education on Safe Practices
      • Emergency Management and First Aid

  8. Special Considerations in Preventive Dentistry

     3 topics
    • Pediatric Dentistry
      • Early Childhood Caries
      • Preventive Strategies for Children
    • Geriatric Dentistry
      • Oral Health Challenges in Elderly
      • Preventive Measures for Elderly
    • Patients with Special Needs
      • Tailored Preventive Strategies
      • Caregiver Education and Training

BDS Preventive Dentistry flashcards — 51 questions with answers

  1. What is Preventive Dentistry?

    The branch of dentistry concerned with the maintenance of oral health and the prevention of dental diseases (such as caries and periodontal disease) through education, professional care, and self-care measures before they occur or progress.

  2. According to Leavell and Clark, what are the three levels of prevention?

    1) Primary prevention (before disease onset), 2) Secondary prevention (early diagnosis and prompt treatment), and 3) Tertiary prevention (limitation of disability and rehabilitation).

  3. What are the two sub-phases of PRIMARY prevention?

    Health promotion (e.g., health education, nutrition) and specific protection (e.g., fluoride application, pit and fissure sealants).

  4. In prevention levels, into which level do pit and fissure sealants and topical fluoride fall?

    Primary prevention, specifically the 'specific protection' component.

  5. Give an example of SECONDARY prevention in dentistry.

    Early detection and restoration of an incipient carious lesion, or scaling and root planing for early periodontitis, to halt disease progression.

  6. Give an example of TERTIARY prevention in dentistry.

    Replacing lost teeth with dentures, bridges, or implants (rehabilitation), or complex prosthodontic reconstruction to restore function after disease damage.

  7. What are the three essential (interdependent) factors in the caries etiology model (excluding time)?

    Host/tooth susceptibility, cariogenic microflora (bacteria such as Streptococcus mutans), and a fermentable substrate (diet). Time is the fourth factor added by Newbrun.

  8. What is the optimal concentration of fluoride in community water fluoridation?

    Approximately $1\ \text{ppm}$ (about $1\ \text{mg/L}$); the U.S. Public Health Service recommended level was updated to $0.7\ \text{ppm}$ in 2015.

  9. Who first proposed the optimal water fluoride level and reduction in caries, and in what landmark study city was fluoridation first implemented?

    H. Trendley Dean established the concept; Grand Rapids, Michigan (USA) was the first city to fluoridate its water supply, in 1945.

  10. Approximately what percentage caries reduction is attributed to community water fluoridation at optimal levels?

    Historically about $50$–$60\%$; in the modern era with widespread fluoride toothpaste it is estimated around $25\%$.

  11. What is dental fluorosis and what causes it?

    A developmental hypomineralization of enamel (mottling, from white flecks to brown staining and pitting) caused by excessive fluoride ingestion during tooth formation.

  12. What index is used to classify the severity of dental fluorosis?

    Dean's Fluorosis Index (categories: normal, questionable, very mild, mild, moderate, severe).

  13. What is the recommended fluoride concentration in adult fluoride toothpaste?

    $1000$–$1500\ \text{ppm}$ fluoride (commonly $1450\ \text{ppm}$).

  14. By what mechanism does fluoride make enamel more caries-resistant at the crystal level?

    Fluoride replaces the hydroxyl group in hydroxyapatite to form fluorapatite: $\ce{Ca10(PO4)6(OH)2 + 2F- -> Ca10(PO4)6F2 + 2OH-}$, which has a lower solubility and higher acid resistance.

  15. Below approximately what pH does hydroxyapatite in enamel begin to demineralize (the 'critical pH')?

    Approximately $\text{pH } 5.5$ for hydroxyapatite (and about $4.5$ for fluorapatite).

  16. List three main mechanisms of action of fluoride against caries.

    1) Promotes remineralization and forms fluorapatite (reduced enamel solubility), 2) Inhibits demineralization, and 3) Inhibits bacterial metabolism (e.g., enolase enzyme in glycolysis).

  17. What is the fluoride concentration and application frequency for professionally applied fluoride varnish?

    $5\%$ sodium fluoride varnish ($22{,}600\ \text{ppm}$ F), typically applied every 3–6 months for high-caries-risk patients.

  18. What is the concentration of acidulated phosphate fluoride (APF) gel used professionally?

    $1.23\%$ fluoride ($12{,}300\ \text{ppm}$), applied in trays for about 4 minutes.

  19. Why should APF gel be avoided on porcelain or composite restorations?

    The acidic (low pH) formulation can etch and roughen porcelain and glass-ionomer/composite surfaces; neutral sodium fluoride is preferred in such cases.

  20. What is the primary purpose of a pit and fissure sealant?

    To physically occlude the deep pits and fissures of occlusal surfaces, creating a barrier that prevents bacteria and fermentable substrate from accumulating, thereby preventing occlusal caries.

Show the other 31 Preventive Dentistry flashcards

  1. Which tooth surfaces benefit most from pit and fissure sealants and why?

    The occlusal surfaces of posterior teeth (molars and premolars), because deep pits and fissures are the most caries-prone sites and are least protected by fluoride.

  2. What are the two main types of pit and fissure sealant materials?

    Resin-based sealants (most common, require acid etching and a dry field) and glass-ionomer sealants (release fluoride, more moisture-tolerant).

  3. What etchant and concentration is typically used before placing a resin sealant?

    $37\%$ phosphoric acid, applied for about 15–30 seconds to create micro-retention in enamel.

  4. What is the main risk if a resin sealant is placed over moisture-contaminated enamel?

    Poor bond strength and micro-leakage, leading to sealant loss and potential caries developing underneath the sealant.

  5. What defines a 'cariogenic' food?

    A food capable of being metabolized by oral bacteria to produce acid that lowers plaque pH below the critical level; typically foods high in fermentable carbohydrates, especially sucrose.

  6. What is the Stephan Curve?

    A graph showing the drop in plaque pH after a sugar exposure, followed by gradual recovery to baseline; pH falls below the critical $5.5$ within minutes and takes ~30–60 minutes to recover.

  7. Which dietary sugar is considered the most cariogenic and why?

    Sucrose, because Streptococcus mutans uses it to synthesize sticky extracellular polysaccharides (glucans) that promote plaque adhesion, in addition to producing acid.

  8. Name three non-cariogenic sugar substitutes used to reduce caries risk.

    Xylitol, sorbitol, and mannitol (sugar alcohols); xylitol also has anti-Streptococcus mutans activity.

  9. Regarding diet counseling, why is the FREQUENCY of sugar intake more important than the total amount?

    Each sugar exposure triggers an acid attack (Stephan Curve drop) lasting ~30–60 minutes, so frequent snacking keeps plaque pH low for longer cumulative periods, causing more demineralization than a single large intake.

  10. What is the primary etiological factor in both dental caries and periodontal disease that plaque control targets?

    Dental plaque (a bacterial biofilm); its removal is the cornerstone of preventing both diseases.

  11. What is dental plaque (biofilm)?

    A structured, adherent community of microorganisms embedded in an extracellular matrix of bacterial and salivary polymers that forms on tooth surfaces.

  12. What is the acquired pellicle and its role in plaque formation?

    A thin, cell-free layer of salivary glycoproteins that adsorbs onto the tooth surface within minutes; it is the initial substrate to which early colonizing bacteria attach.

  13. What is the recommended toothbrushing technique for effective plaque removal at the gingival margin?

    The modified Bass technique: bristles angled at $45^{\circ}$ toward the gingival sulcus with short vibratory strokes to clean the sulcular area.

  14. Which chemical agent is considered the 'gold standard' antiplaque mouth rinse?

    Chlorhexidine gluconate (commonly $0.12\%$ or $0.2\%$), due to its substantivity (prolonged binding to oral tissues).

  15. What are two common side effects of long-term chlorhexidine mouthwash use?

    Extrinsic brown staining of teeth and tongue, and altered/reduced taste sensation (also increased calculus formation).

  16. Which interdental aids are recommended for cleaning between teeth?

    Dental floss (for tight contacts) and interdental brushes (for larger interproximal spaces/open embrasures).

  17. What index is commonly used to quantify plaque levels for oral hygiene assessment?

    The Plaque Index (Silness and Löe) or the Oral Hygiene Index-Simplified (OHI-S by Greene and Vermillion).

  18. What are the classic clinical signs of healthy gingiva?

    Coral pink color, stippled ('orange peel') texture, firm consistency, knife-edge margins, and no bleeding on probing.

  19. What is gingivitis and is it reversible?

    Inflammation of the gingiva (redness, swelling, bleeding on probing) confined to soft tissue with no attachment loss; it is reversible with adequate plaque control.

  20. What clinical feature distinguishes periodontitis from gingivitis?

    Periodontitis involves irreversible loss of connective tissue attachment and alveolar bone (true pocketing, clinical attachment loss), whereas gingivitis has no attachment loss.

  21. What is the normal healthy gingival sulcus probing depth?

    Approximately $1$–$3\ \text{mm}$.

  22. What is the goal of School Dental Health Programs?

    To promote oral health in children through education, screening, preventive measures (fluoride mouthrinse programs, sealant programs), and referral, reaching a captive population early.

  23. Name a common school-based preventive measure delivered as a rinse.

    Weekly or fortnightly $0.2\%$ sodium fluoride mouthrinse programs (or daily $0.05\%$ NaF rinse).

  24. In health education, what are the three domains of learning that behavior-change models address?

    Cognitive (knowledge), affective (attitudes/beliefs), and psychomotor (skills/behavior) domains.

  25. What is the purpose of caries risk assessment (e.g., CAMBRA)?

    To evaluate an individual's balance of risk factors (bacteria, poor hygiene, diet) versus protective factors (fluoride, saliva) to categorize caries risk and tailor preventive management.

  26. List three major risk factors for dental caries.

    High/frequent sugar intake, poor oral hygiene (plaque accumulation), and reduced salivary flow (xerostomia); others include high Streptococcus mutans counts and lack of fluoride exposure.

  27. How does saliva protect against caries?

    Through mechanical clearance of food/bacteria, buffering acids (bicarbonate system), providing calcium and phosphate for remineralization, and antibacterial components (IgA, lysozyme, lactoferrin).

  28. What is interceptive orthodontics?

    Orthodontic intervention that recognizes and eliminates a developing (potential) malocclusion in the early/mixed dentition to reduce or prevent its severity — e.g., space maintenance, correcting crossbites, habit control.

  29. Why is a space maintainer used after early loss of a primary tooth?

    To preserve the arch space (E-space) for the permanent successor and prevent adjacent teeth from drifting, which would otherwise cause crowding or impaction — a key interceptive orthodontic measure.

  30. What is the earliest clinical sign of enamel caries (early detection target)?

    The 'white spot lesion' — a chalky, opaque area of subsurface enamel demineralization with an intact surface, which is potentially reversible through remineralization.

  31. In pediatric dentistry, what is Early Childhood Caries (ECC) and a primary preventive strategy against it?

    ECC is the presence of one or more decayed, missing, or filled tooth surfaces in a child under 6 years; a key preventive strategy is avoiding prolonged nighttime bottle/breast feeding with sugary liquids ('nursing/bottle caries') and early fluoride exposure.

Same Preventive Dentistry syllabus in other exams

The Preventive Dentistry outline above is identical in this exam:

BDS Preventive Dentistry FAQ

What is in the BDS Preventive Dentistry syllabus?

BDS Preventive Dentistry is split into 8 chapters: Introduction to Preventive Dentistry, Oral Health Promotion, Preventive Measures for Dental Caries, Preventive Measures for Periodontal Diseases, Preventive Orthodontics, Preventive Measures for Oral Cancer, Preventive Measures for Dental Trauma and Special Considerations in Preventive Dentistry. Together they contain 20 topics and 57 sub-topics.

How many chapters are in BDS Preventive Dentistry?

8 chapters, containing 20 topics and 57 sub-topics. The largest chapter is Oral Health Promotion, with 3 topics.

Are there flashcards for BDS Preventive Dentistry?

Yes — a 51-card Preventive Dentistry deck, printed in full in the flashcards section of this page and available in the Examius app with spaced repetition. The free plan covers one exam of your choice, including its flashcards; Examius Pro, a one-time purchase, unlocks every other exam and deck.