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Periodontics R11 Periodontics SDLE MCQ Facebook X LinkedIn Messenger Messenger WhatsApp Telegram Print Report a question What’s wrong with this question? You cannot submit an empty report. Please add some details. 0% 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101 Periodontics R11 Periodontics SDLE MCQ DentQuiz SDLE Mock Exam Instruction To mark a question and come back to it later, click the Bookmark icon. For the best experience, use a computer and switch to full screen button (from the top left corner). You can review and change your answers before clicking Next. Explanations will appear after each question to help you understand the correct answer. Your results will be shown right after you finish the exam. This is a fresh attempt — previous answers or bookmarks won’t be saved. The source of the questions and answers is recent Rafee’ Al-Maqam files. Special thanks to رفيع المقام. Answers are based on colleagues best efforts and may not be 100% accurate. If you believe an answer is incorrect, please click the Report button to let us know. Please fill in your details to continue NameEmailPhone Number 1 / 101 Category: Periodontics 1) What is the yellowish material on teeth that can’t be rinsed off? Food debris Calculus Plaque Stains Plaque is the initial biofilm that adheres firmly to teeth. 2 / 101 Category: Periodontics 2) Treatment for Class I furcation? SRP Flap surgery GTR Extraction Scaling and root planing (SRP) is sufficient for Class I furcation. 3 / 101 Category: Periodontics 3) Diagnosis for pain after eating popcorn? ANUG Gingival abscess Food impaction Periodontal abscess Popcorn husks commonly cause traumatic gingival abscesses. 4 / 101 Category: Periodontics 4) Treatment for periodontal abscess in diabetic patient? Systemic antibiotics Local debridement Both Observation Diabetics require both local treatment and possible antibiotics. 5 / 101 Category: Periodontics 5) What treatment is needed after orthodontic removal? SRP Crown RCT Restoration Scaling and root planing (SRP) is essential after orthodontic treatment. 6 / 101 Category: Periodontics 6) Diagnosis for swelling after scaling in diabetic patient? Periodontal abscess Cellulitis Gingivitis Periapical abscess Localized swelling post-scaling suggests periodontal abscess. 7 / 101 Category: Periodontics 7) When does CAL equal PD? With pocket formation With gingival hyperplasia With no recession With bone loss CAL = PD when no recession exists (e.g., sulcus depth = attachment level). 8 / 101 Category: Periodontics 8) Example of digital periodontal probe? Florida probe PerioTemp Pro-Depth All of above Florida probe is the most widely used digital probing system. 9 / 101 Category: Periodontics 9) Cause of gingival enlargement after eating fish? Periodontal abscess Food impaction Allergic reaction Gingival abscess Fish bones may cause traumatic gingival abscesses. 10 / 101 Category: Periodontics 10) What is the diameter of a periodontal probe tip? 0.3 mm 0.5 mm 2 mm 1 mm Standard periodontal probes have 0.5mm tips for accurate measurements. 11 / 101 Category: Periodontics 11) Why do dentists advise patients to brush dentures daily? To avoid inflammation To remove plaque To prevent cross infections To avoid bad smell Daily brushing prevents bacterial buildup causing bad odor. 12 / 101 Category: Periodontics 12) What makes scaling and root planing difficult? Divergent and long roots Divergent and short roots Convergent and long roots Convergent and short roots Convergent and long roots are harder to instrument effectively. 13 / 101 Category: Periodontics 13) What does this image show? Herpetic lesion Periodontal pocket Lichen planus Gingival abscess Localized red swelling indicates gingival abscess. 14 / 101 Category: Periodontics 14) If gingival margin is 2mm from CEJ and PD is 6mm, what is CAL? 2mm 8mm 6mm 4mm CAL = (Gingival margin to CEJ) + PD = 2 + 6 = 8mm. 15 / 101 Category: Periodontics 15) How many days until dental calculus forms? 1-2 days 21-28 days 3-5 days 10-14 days Calculus typically mineralizes from plaque in 10-14 days. 16 / 101 Category: Periodontics 16) Which probe has 3 sections? Marquis probe Williams probe UNC probe WHO probe Marquis probe features 3 sections (3-6-9mm markings). 17 / 101 Category: Periodontics 17) Cause of bleeding post-laser gingivectomy? Plaque accumulation Laser side effect Spontaneous bleeding Allergic reaction Plaque-induced inflammation overrides laser benefits. 18 / 101 Category: Periodontics 18) What is the new term for “biological width”? Alveolar crest membrane Supracrustal tissue attachment Dentogingival complex Periodontal ligament zone “Supracrustal tissue attachment” is the updated terminology. 19 / 101 Category: Periodontics 19) Purpose of resective osteotomy after perio treatment? Recontouring Pocket reduction Regeneration Furcation plasty Recontouring modifies physiological bone architecture. 20 / 101 Category: Periodontics 20) How long to wait after crown lengthening for crown fabrication? 7-8 months 1-2 months 3-4 months 5-6 months 3-4 months allows for gingival stability and tissue maturation. 21 / 101 Category: Periodontics 21) Cause of painful implant with exposed metal collar? Prosthetic misfit Poor oral hygiene Loss of epithelial attachment Occlusal overload Exposed metal indicates breakdown of soft tissue seal around implant. 22 / 101 Category: Periodontics 22) Piezoscaler working motion? Back-and-forth Rotary Vertical Elliptical Piezoelectric scalers use linear back-and-forth motion. 23 / 101 Category: Periodontics 23) Gingival changes associated with aging? Reduced vascularity Decreased keratinized tissue Increased attached gingiva Thinner epithelium Attached gingiva increases due to apical migration of junctional epithelium. 24 / 101 Category: Periodontics 24) Drug causing gingival hyperplasia? Antibiotics Anticoagulants Calcium channel blockers Beta blockers Nifedipine/amlodipine frequently induce gingival overgrowth. 25 / 101 Category: Periodontics 25) Crown lengthening for tooth with 2mm KT and 3mm bone? Apical flap + bone removal Orthodontic extrusion No treatment needed Gingivectomy alone Requires osseous reduction to achieve biological width. 26 / 101 Category: Periodontics 26) Gingival enlargement covering 3/4 crown is class? Class 1 Class 2 Class 3 Class 4 Class 3 covers >1/2 but not entire crown (Seymour classification). 27 / 101 Category: Periodontics 27) How to detect subgingival calculus? Tactile perception Visual inspection Disclosing agent Radiographs Tactile perception with a probe is most reliable for subgingival calculus. 28 / 101 Category: Periodontics 28) Best flap for lesion distal to lower second molar? Semilunar Pedicle Envelope Intrasulcular Intrasulcular flaps provide optimal access to posterior lesions. 29 / 101 Category: Periodontics 29) Minimal distance from restoration to bone crest in furcation areas? 2-3mm 5-6mm 4-5mm 3-4mm 5-6mm prevents biological width violation in complex furcation anatomy. 30 / 101 Category: Periodontics 30) What is the ideal angle for scaling? 20-30 degrees 0 degrees 10-15 degrees 45-90 degrees 45-90 degrees optimizes cutting efficiency. 31 / 101 Category: Periodontics 31) Boundary between attached/unattached gingiva? Alveolar mucosa Mucogingival junction Interdental papilla Free gingival groove Free gingival groove marks the apical border of unattached gingiva. 32 / 101 Category: Periodontics 32) Flap choice for 3-wall defect between #44-45? Pedicle flap Papilla preservation flap Envelope flap Semilunar flap Preserves interdental papilla for optimal healing. 33 / 101 Category: Periodontics 33) Diagnosis for post-scaling abscess? Herpetic lesion Pericoronitis Periodontal abscess Gingival abscess Periodontal abscesses commonly occur after scaling. 34 / 101 Category: Periodontics 34) Key diagnostic difference between periapical/periodontal abscess? Swelling location Pain characteristics Tooth vitality Radiographic appearance Vitality testing is primary determinant (vital=periodontal, non-vital=periapical). 35 / 101 Category: Periodontics 35) Plastic curettes are used for? Implant surfaces Ceramic crowns Enamel Dentin hypersensitivity Plastic instruments prevent implant surface damage. 36 / 101 Category: Periodontics 36) Instrument grasp shown in image? Inverted grasp Standard pen grasp Palm-thumb grasp Modified pen grasp Modified pen grasp provides optimal control for scaling. 37 / 101 Category: Periodontics 37) When does initial gingivitis begin? 1-2 days 14-21 days 4-7 days 2-4 days Initial gingivitis signs appear within 2-4 days of plaque accumulation. 38 / 101 Category: Periodontics 38) Why does #7 show Class II furcation vs #6’s Class I? #7 has divergent roots #6 has long roots #7 has short roots #6 has convergent roots Root length directly affects furcation vulnerability. 39 / 101 Category: Periodontics 39) Which cells repair pulp tissue after injury? Cementoblasts Undifferentiated mesenchymal cells Fibroblasts Odontoblasts Undifferentiated mesenchymal cells differentiate to regenerate pulp. 40 / 101 Category: Periodontics 40) Difference between dehiscence and fenestration? No difference Fenestration: isolated bone loss Both involve gingival recession Dehiscence: bone loss to apex Fenestration is isolated bone loss without apical involvement. 41 / 101 Category: Periodontics 41) 60.58-year-old man is complaining from tooth mobility. The clinical examination revealed probing depths that range from 4 to 9 mm, clinical attachment loss of >5 mm and grade II to III mobility in most 23 of his teeth. The patient also smoked cigarettes 2 packs a day. Which of the following is the most likely diagnosis? Generalized Stage III Grade B periodontitis Localized Stage III Grade C periodontitis Generalized Stage III Grade C periodontitis Localized Stage III Grade A periodontitis Smoking + severe attachment loss indicates Grade C. 42 / 101 Category: Periodontics 42) What is the color coding sequence of UNC-15 probe? Every 1mm Alternating colors Every 3mm Every 5mm (5,10,15) UNC-15 probes mark every 5mm for easy depth assessment. 43 / 101 Category: Periodontics 43) Bone architecture with papilla loss exceeding other areas? Inverted architecture Normal architecture Flat architecture Reversed architecture Reversed architecture shows greater interdental than radicular bone loss. 44 / 101 Category: Periodontics 44) Management of gingival abscess? Antibiotics Incision and drainage Observation Both Gingival abscesses require drainage and possible antibiotics. 45 / 101 Category: Periodontics 45) How is recession type II treated? Crown lengthening Guided tissue regeneration Gingival graft Flap surgery Gingival/connective tissue grafts are gold standard for type II recession. 46 / 101 Category: Periodontics 46) Treatment for excessive gingival display with short clinical crowns? Porcelain veneers Crown lengthening Gingivectomy Orthodontic extrusion Gingivectomy corrects excessive gingival display when no bone reduction needed. 47 / 101 Category: Periodontics 47) Interpretation of 40% plaque and 20% BOP scores? Attempts but ineffective Knows technique but inconsistent Excellent oral hygiene Lacks knowledge/motivation High plaque score indicates fundamental behavioral/oral hygiene deficiencies. 48 / 101 Category: Periodontics 48) Interpretation of furcation differences between #16 and #17? #16 has divergent roots #17 has shorter root trunk #16 has fused roots #17 has longer roots Shorter root trunks lead to more advanced furcation involvement. 49 / 101 Category: Periodontics 49) Effect of mesially tilted lower third molar extraction? Complete bone regeneration Mesial bone loss on #7 Distal wall defect on #7 No significant effect Third molar extraction often leaves distal defects on adjacent teeth. 50 / 101 Category: Periodontics 50) Management of persistent isolated pocket? Surgical resection Local antibiotic delivery Observation Systemic antibiotics Local antibiotics target refractory sites effectively. 51 / 101 Category: Periodontics 51) Treatment for short anterior teeth with normal periodontium? Esthetic crown lengthening Gingival grafts Composite bonding No treatment needed Crown lengthening improves crown-to-root ratio for esthetics. 52 / 101 Category: Periodontics 52) What is the main cell type in established gingivitis? Plasma cell Macrophage Lymphocyte Neutrophil Plasma cells dominate chronic inflammation in gingivitis. 53 / 101 Category: Periodontics 53) What procedure is shown in the edentulous area post-surgery? Bone grafting Flap surgery GTR GBR Guided Bone Regeneration (GBR) is used for ridge augmentation. 54 / 101 Category: Periodontics 54) Causative bacteria in aggressive periodontitis with family history? T. forsythia P. gingivalis A. actinomycetemcomitans F. nucleatum A.a is strongly associated with familial aggressive periodontitis. 55 / 101 Category: Periodontics 55) What is an indication for resective osseous surgery? Furcation involvement Gingival recession One-wall defect Three-wall defect Three-wall defects respond well to resective osseous surgery. 56 / 101 Category: Periodontics 56) Minimal bone-to-restoration margin distance? 3mm 2mm 5mm 4mm 3mm maintains biological width (1mm epithelium + 1mm CT + 1mm sulcus). 57 / 101 Category: Periodontics 57) Cause of painful implant (no mobility/bone loss)? Nerve impingement Failed osseointegration Peri-implant mucositis Prosthetic overload Mucositis causes pain without bone loss in early stages. 58 / 101 Category: Periodontics 58) Movement pattern of magnetic scaler tip? Round Elliptical Zigzag Linear Elliptical motion provides optimal calculus removal. 59 / 101 Category: Periodontics 59) Smoking’s effect on bone? No significant effect Causes osteosclerosis Increases density Accelerates resorption Smoking impairs osteoblast function and angiogenesis. 60 / 101 Category: Periodontics 60) When does dental plaque begin to form? 48 hours 24 hours 6 hours 12 hours Plaque formation starts within 12 hours after cleaning. 61 / 101 Category: Periodontics 61) Advice for ulcerated gingiva from medium toothbrush? Switch to soft brush Use desensitizing paste Change technique Discontinue brushing Soft brushes prevent traumatic lesions in sensitive patients. 62 / 101 Category: Periodontics 62) Attached gingiva boundaries? Sulcus base to bone crest Interdental col to frenum CEJ to free margin Free groove to mucogingival line Defined coronally by free groove and apically by mucogingival junction. 63 / 101 Category: Periodontics 63) Best treatment for multiple 1-2mm recessions with sensitivity? Coronally advanced flap Apically positioned flap Connective tissue graft Free gingival graft CT grafts offer superior esthetics for anterior teeth with minimal recession. 64 / 101 Category: Periodontics 64) Risk for thin scalloped gingival phenotype? Recession Hyperplasia Pocket formation No significant risk Thin tissues are prone to recession from mechanical trauma. 65 / 101 Category: Periodontics 65) Which probe has 0.5mm markings at the tip? UNC probe WHO probe Nabers probe Williams probe WHO probes have 0.5mm increments at the tip. 66 / 101 Category: Periodontics 66) Bacteria causing horizontal bone loss in 60-year-old? Fusobacterium Streptococci Porphyromonas Actinomyces Actinomyces species are linked to chronic horizontal bone loss. 67 / 101 Category: Periodontics 67) Gracey 11/12 curette use? Distal of #36 Buccal of #24 Lingual of #41 Mesial of #36 Designed for mesial surfaces of posterior teeth. 68 / 101 Category: Periodontics 68) Treatment for Class II furcation? GTR Extraction Tunnel preparation SRP Guided Tissue Regeneration (GTR) is indicated for Class II furcations. 69 / 101 Category: Periodontics 69) Bone regeneration technique shown in CBCT? Socket grafting Ridge preservation GBR Block graft Block grafts are used for significant vertical/horizontal defects. 70 / 101 Category: Periodontics 70) Treatment for diabetic patient with swelling and pus at #46? Incision and drainage SRP Antibiotics Extraction Scaling and root planing is first-line treatment for periodontal abscesses. 71 / 101 Category: Periodontics 71) Most common periodontal disease sign? Tooth mobility Suppuration Recession Bleeding on probing BOP is the earliest detectable clinical sign. 72 / 101 Category: Periodontics 72) Bacteria associated with pregnancy gingivitis? P. intermedia S. mutans A. actinomycetemcomitans T. denticola P. intermedia thrives in elevated progesterone levels. 73 / 101 Category: Periodontics 73) Which scaler has a unique angulation? Universal Bone file Gracey Sickle Gracey curettes have area-specific angled blades. 74 / 101 Category: Periodontics 74) Treatment for localized recession without interproximal loss? Night guard therapy Composite restoration Root coverage surgery Pink porcelain crown Surgical root coverage provides predictable results for Miller Class I recession. 75 / 101 Category: Periodontics 75) What are the components of biological width? 0.5mm epithelium + 1.5mm CT 1mm epithelium + 1mm CT 1.5mm epithelium + 0.5mm CT 2mm epithelium Biological width consists of 1mm epithelium and 1mm connective tissue. 76 / 101 Category: Periodontics 76) What angle should a curette be inserted for subgingival scaling? 0 degrees 30 degrees 10 degrees 20 degrees 0 degrees allows smooth subgingival insertion. 77 / 101 Category: Periodontics 77) What instrument measures gingival thickness? Bone caliper Ultrasonic scaler Probe with markings Periodontal probe Probes with markings (e.g., UNC-15) are standard for thickness measurement. 78 / 101 Category: Periodontics 78) Tooth with recent amalgam and Class 2 mobility indicates? Secondary occlusal trauma Primary occlusal trauma Periodontal abscess Root fracture Secondary trauma occurs with compromised periodontium. 79 / 101 Category: Periodontics 79) Action for calculus preventing pocket measurement? Estimate visually Record as-is Use radiographic measurement Scale first Calculus removal is prerequisite for accurate probing. 80 / 101 Category: Periodontics 80) Microscopic findings in healthy gingival fluid? Many plasma cells No inflammatory cells Neutrophil predominance Few lymphocytes Healthy sites show minimal lymphocytes without active inflammation. 81 / 101 Category: Periodontics 81) What is the normal probing depth of healthy gingiva? 3-5 mm 0.5-2 mm 2-4 mm 1-3 mm 1-3 mm is the physiologic sulcus depth without pathology. 82 / 101 Category: Periodontics 82) Complication of impacted canine exposure? Ankylosis Pulp necrosis Root resorption Recession Surgical trauma often causes labial gingival recession. 83 / 101 Category: Periodontics 83) What is the probe angulation during measurement? 45 degrees 10 degrees 20 degrees 30 degrees 10 degrees ensures accurate pocket depth reading. 84 / 101 Category: Periodontics 84) Gingival enlargement in renal failure patients? Beta blockers Diuretics Calcium channel blockers NSAIDs CCBs cause fibrous gingival overgrowth. 85 / 101 Category: Periodontics 85) Management of gingival recession with CEJ caries? Monitoring Restoration first Combined procedure Gingival graft first Gingival graft should precede restoration to ensure proper tissue coverage. 86 / 101 Category: Periodontics 86) Instrument modification for deep posterior pockets? Smaller handle Longer terminal shank Curved tip Thicker blade Extended shank improves access to posterior areas. 87 / 101 Category: Periodontics 87) Post-treatment evaluation with less than 5% bleeding on probing (BOP) with good oral hygiene indicates? Treatment failure Need for surgery Systemic involvement Periodontal healing Low BOP demonstrates successful tissue inflammation control. 88 / 101 Category: Periodontics 88) What are risk factors for periodontitis? All of the above Smoking Diabetes Genetic factors Multiple factors including smoking, diabetes, and genetics contribute. 89 / 101 Category: Periodontics 89) Main concern with excessive alcohol mouthwash use? Tooth staining Altered taste perception Oral mucosal dryness Enamel demineralization Alcohol causes xerostomia and disrupts oral microbiome balance. 90 / 101 Category: Periodontics 90) Which tooth is most challenging for periodontal treatment? Lower central incisor Upper first premolar Lower second molar Upper canine Upper first premolar’s mesial root concavity complicates treatment. 91 / 101 Category: Periodontics 91) Which radiograph detects biological width violation? Panoramic Occlusal Periapical Vertical bitewing Vertical bitewings show alveolar crest and crown-root relationships clearly. 92 / 101 Category: Periodontics 92) Which tooth is most difficult to scale? Lower molar Upper canine Distobuccal root of upper 7 Upper 4 Upper 4’s root anatomy makes scaling challenging. 93 / 101 Category: Periodontics 93) Disadvantage of Florida probe? Requires calibration Limited accessibility High cost All of above Combines all common limitations of electronic probes. 94 / 101 Category: Periodontics 94) Treatment for Class I and II furcation? Observation GTR Combination therapy SRP Combination therapy works best for mixed furcation classes. 95 / 101 Category: Periodontics 95) Best radiograph for advanced periodontitis? Vertical bitewing Occlusal Periapical Panoramic Vertical bitewings show bone loss patterns best. 96 / 101 Category: Periodontics 96) When to perform surgery after nonsurgical therapy? 8-10 weeks 12 weeks Immediately 4-6 weeks 4-6 weeks allows evaluation of initial therapy results. 97 / 101 Category: Periodontics 97) Why might periodontitis recur in a heavy smoker? Poor oral hygiene Incomplete calculus removal All of the above Smoking Smoking impairs healing and masks bleeding, complicating maintenance. 98 / 101 Category: Periodontics 98) What is the universal curette’s working angle? 45 degrees 90 degrees 60 degrees 120 degrees 90 degrees is the standard working angle for universal curettes. 99 / 101 Category: Periodontics 99) What is the treatment for Stillman’s cleft? Connective tissue graft Laser therapy Gingivectomy Free gingival graft Connective tissue grafts cover recessions like Stillman’s cleft. 100 / 101 Category: Periodontics 100) Cause of swelling after scaling in diabetic patient? Unremoved calculus Allergic reaction Trauma Infection Residual subgingival calculus can cause delayed healing in diabetics. 101 / 101 Category: Periodontics 101) Best instrument for subgingival calculus? Gracey curette Sickle scaler Ultrasonic scaler Piezoscaler Gracey curettes access subgingival areas effectively. 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