Orthodontics R11 Orthodontics 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% 12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182838485868788899091929394 Orthodontics R11 Orthodontics 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 / 94 Category: Orthodontics 1) A cephalometric analysis shows SNA 80°, SNB 70°, and ANB 11°. What is the diagnosis? Mandibular protrusion Maxillary retrognathism Mandibular retrognathism Maxillary protrusion Low SNB indicates mandibular retrognathism. 2 / 94 Category: Orthodontics 2) What is the treatment for Class 2 camouflage? Extraction upper 4 Functional appliance Extraction lower 4 Headgear Extraction of upper first premolars is common for Class 2 camouflage. 3 / 94 Category: Orthodontics 3) A Class III malocclusion due to maxillary constriction. What appliance is used? Quad helix Banded expander Bonded expander W-arch Bonded expanders are effective for maxillary constriction. 4 / 94 Category: Orthodontics 4) What is the effect of a large filling on orthodontic treatment? Reduces tooth movement Causes tooth fracture Delays treatment Increases mobility Large restorations weaken tooth structure, risking fracture. 5 / 94 Category: Orthodontics 5) What is a tongue retainer device used for? Bruxism Speech therapy TMJ disorders Sleep apnea Tongue retainers prevent airway obstruction in sleep apnea. 6 / 94 Category: Orthodontics 6) A patient has Class I molar on the left and Class II on the right. What is the molar classification? Class I subdivision right Class II subdivision right Class II subdivision left Class I subdivision left Asymmetric molar relationships are classified as subdivisions. 7 / 94 Category: Orthodontics 7) What appliance retains crossbite correction after treatment? Essix retainer Fixed retainer Hawley retainer Quad helix Quad helix maintains expansion and alignment. 8 / 94 Category: Orthodontics 8) A patient has proclined upper incisors and retroclined lower incisors with overjet. What is the classification? Class I Class IV Class III Class II Proclined uppers and retroclined lowers are Class II features. 9 / 94 Category: Orthodontics 9) A patient with mobile teeth and root resorption after accelerated orthodontics. What is the cause? Systemic disease Infection Trauma Rapid forces Accelerated treatment with high forces risks root resorption. 10 / 94 Category: Orthodontics 10) An osteoporotic patient wants orthodontic treatment. What force is recommended? Avoid treatment Slow Regular Fast Slow forces minimize bone damage in osteoporotic patients. 11 / 94 Category: Orthodontics 11) What is the treatment for an adult with narrow maxilla and incisor crowding? Expansion without extraction Orthognathic surgery Distalization of molars Extraction of premolars Extraction of premolars creates space for alignment in crowded cases. 12 / 94 Category: Orthodontics 12) A patient has a protrusive mandible, maxillary deficiency, crowding, and impacted canine. What is treated first? Protrusive mandible Maxillary deficiency Crowding Impacted canine Maxillary expansion addresses constriction and crowding. 13 / 94 Category: Orthodontics 13) A patient has subgingival orthodontic bands. What is the likely effect? Gingival recession Tooth mobility Gingival growth Root resorption Subgingival bands can cause gingival recession. 14 / 94 Category: Orthodontics 14) A patient with external root resorption on tooth 5. What is the cause? High orthodontic force Infection Trauma Genetic factors Excessive force during orthodontics causes root resorption. 15 / 94 Category: Orthodontics 15) What defines pseudo-Class III malocclusion? Molar Class 1 Genetic predisposition Skeletal Class 1 Functional shift Pseudo-Class III is a dental malocclusion with a normal skeletal base. 16 / 94 Category: Orthodontics 16) A patient with crowding proceeds with extraction. What is the next step? Extract all teeth at once No extraction Refer to periodontist Consult orthodontist Orthodontic consultation ensures proper treatment planning. 17 / 94 Category: Orthodontics 17) A patient with ceramic braces and coated wire develops anterior abfraction. What is the cause? Bruxism Poor oral hygiene Allergic reaction Using anterior teeth for grinding Ceramic braces increase brittleness, leading to abfraction under stress. 18 / 94 Category: Orthodontics 18) An orthodontic wire irritates the patient. What is the solution? Remove the appliance Cut the wire Apply wax Adjust the wire Wax provides temporary relief from wire irritation. 19 / 94 Category: Orthodontics 19) A decreased ANB angle indicates which class? Class I Class III None Class II Lower ANB values correlate with Class III malocclusion. 20 / 94 Category: Orthodontics 20) A patient has overjet, inverted lower lip, deep labiomental fold, and decreased SNB. What is the diagnosis? None Lower deficiency Microdontia Upper prognathism Low SNB suggests mandibular deficiency. 21 / 94 Category: Orthodontics 21) A pediatric patient with persistent thumb sucking. What is the treatment? Face mask Hawley retainer Tongue crib Palatal crib appliance Palatal cribs discourage thumb sucking. 22 / 94 Category: Orthodontics 22) A 13-year-old with posterior crossbite. What is the treatment? Slow expansion No treatment Hass expansion Rapid palatal expansion Hass appliances are used for posterior crossbites. 23 / 94 Category: Orthodontics 23) A 13-year-old with anterior open bite, posterior crossbite, and thumb sucking. What is the treatment? Quad helix Hawley retainer Tongue crib Hass appliance Hass appliances expand the maxilla and correct crossbites. 24 / 94 Category: Orthodontics 24) A 30-year-old with retained #53 and impacted #13 (poor prognosis). What is the treatment? Crown on #53 Extract #13 and implant Leave #53 Extract and suture Extraction and implant replace non-viable canines. 25 / 94 Category: Orthodontics 25) A patient with Class II malocclusion and reduced lower face height. How is this managed? Posterior bite plate Cervical pull headgear Functional appliance Anterior bite plate Anterior bite plates open the bite and improve lower face height. 26 / 94 Category: Orthodontics 26) A 13-year-old with crossbite and skeletal deficiency. What is the treatment? Slow expansion daily Rapid expansion (0.5mm daily) Rapid expansion weekly Slow expansion weekly Rapid expansion is used for skeletal deficiencies in adolescents. 27 / 94 Category: Orthodontics 27) A patient has Class II molars bilaterally. What is the skeletal classification? Class III skeletal Class I skeletal Class II skeletal None Bilateral Class II molars indicate Class II skeletal malocclusion. 28 / 94 Category: Orthodontics 28) What causes unilateral crossbite during lateral tooth eruption? Tongue/cheek pressure Abnormal chewing Abnormal swelling Functional mandibular shift Functional shifts during eruption lead to unilateral crossbites. 29 / 94 Category: Orthodontics 29) A patient with gummy smile and long maxilla. What is the treatment? No treatment Orthodontics Surgery Botox Surgical maxillary impaction corrects excessive gingival display. 30 / 94 Category: Orthodontics 30) What type of bite plane is used in Class II division 2 malocclusion? Inclined plane Flat plane Anterior bite plate Posterior bite plate Anterior bite plates help correct deep bites in Class II cases. 31 / 94 Category: Orthodontics 31) A healthy orthodontic patient complains of pain. What should be given? Paracetamol NSAID Local anesthetic Antibiotics Paracetamol is safer for mild orthodontic pain. 32 / 94 Category: Orthodontics 32) What is the most common feature of Class I malocclusion? Deep bite Spacing Open bite Crowding Crowding is the hallmark of Class I malocclusion. 33 / 94 Category: Orthodontics 33) What is the treatment for Class 3 camouflage? Extraction upper 4 only Extraction lower 4 and upper 5 Extraction lower 6 and upper 5 No extraction needed Extraction of lower first premolars and upper second premolars is the standard approach for Class 3 camouflage. 34 / 94 Category: Orthodontics 34) If 75g force is used for tipping upper centrals, what force is needed for intrusion? 125g 100g 25g 75g Intrusion requires lighter forces (25-50g) to avoid root resorption. 35 / 94 Category: Orthodontics 35) A patient with open bite requests faster orthodontic treatment. What adjunctive procedure is recommended? Alveolar decortication Gingivectomy Occlusal adjustment CTG Decortication accelerates tooth movement via regional acceleratory phenomenon. 36 / 94 Category: Orthodontics 36) A patient reports pain during eating 3 days after starting orthodontics. What is the advice? Adjust the appliance Stop treatment Prescribe analgesics Reassure the patient Early orthodontic discomfort resolves within a week. 37 / 94 Category: Orthodontics 37) Why is a quad helix appliance beneficial? Less discomfort Easy to clean No patient activation needed Faster treatment Quad helix appliances are passive and require no patient cooperation. 38 / 94 Category: Orthodontics 38) A 14-year-old has space for right canine but not left. What is the treatment? No treatment Orthodontic alignment Fixed prosthesis Canine extraction Fixed prostheses replace missing or non-erupted canines. 39 / 94 Category: Orthodontics 39) A patient with red, inflamed left cheek during orthodontic treatment. What is the probable cause? Stainless steel allergy Infection Trauma Poor oral hygiene Allergic reactions to stainless steel components can occur. 40 / 94 Category: Orthodontics 40) What is the typical malocclusion classification in cleft lip patients? Class II division 2 Class III Class II division 1 Class I Cleft lip patients often exhibit Class III malocclusion due to maxillary deficiency. 41 / 94 Category: Orthodontics 41) What is the treatment for a single anterior crossbite? Surgery Removable appliance (Z-spring) Functional appliance Fixed appliance Z-springs correct anterior crossbites in removable appliances. 42 / 94 Category: Orthodontics 42) A patient has a reverse overjet of 6mm. What is the treatment? Headgear Camouflage orthodontics Functional appliance Orthognathic surgery Severe skeletal discrepancies require orthognathic surgery. 43 / 94 Category: Orthodontics 43) An 8-year-old with overgrown mandible and constricted maxilla. What is treated first? Chin cup for mandible No treatment Functional appliance Maxillary expansion Maxillary expansion addresses constriction before mandibular growth modification. 44 / 94 Category: Orthodontics 44) What problem is a chin cup used to treat? Class III malocclusion Deep bite Class II malocclusion Open bite Chin cups restrain mandibular growth in Class III cases. 45 / 94 Category: Orthodontics 45) What appliance is used for a retruded mandible? Rapid palatal expander Chin cup Functional appliances Face mask Functional appliances advance the mandible. 46 / 94 Category: Orthodontics 46) A 2-year-old with thumb sucking. How is this managed? Palatal crib Orthodontic pacifier Behavioral therapy Wait until age 8 Thumb sucking is normal in toddlers and usually resolves by age 4. 47 / 94 Category: Orthodontics 47) How often should rapid expansion be activated? Twice a day Once a week Every other day Once a day Rapid expansion requires daily activation for effective results. 48 / 94 Category: Orthodontics 48) A 7-year-old with excessive mandibular growth and family history of prognathism. What is the management? Orthognathic surgery Fixed orthodontics Start treatment Delay treatment Early intervention is avoided due to unpredictable growth. 49 / 94 Category: Orthodontics 49) A patient has a small ulceration distally after orthodontic treatment. What is the likely cause? Allergic reaction Trauma Infection Wire irritation Orthodontic wires often cause soft tissue irritation. 50 / 94 Category: Orthodontics 50) What appliance is used for mandibular deficiency? Bionator Face mask Headgear Twin block Twin blocks are functional appliances for mandibular deficiency. 51 / 94 Category: Orthodontics 51) A patient has impinging upper and lower incisors fully visible when smiling. What is the orthodontic solution? Extrude upper posteriors Extrude lower posteriors Extrude upper anterior Intrude lower anteriors Extruding lower posteriors opens the bite and reduces impingement. 52 / 94 Category: Orthodontics 52) A patient has a diastema. What is the likely cause? Crowding Trauma Microdontia Low frenum attachment High frenal attachments cause midline diastemas. 53 / 94 Category: Orthodontics 53) What occurs during mesial tooth movement? Uniform resorption Mesial resorption, distal deposition Distal resorption, mesial deposition No change Tooth movement involves bone remodeling on pressure/tension sides. 54 / 94 Category: Orthodontics 54) A patient with long face, narrow maxilla, posterior overeruption, and anterior open bite. What is the likely cause? Genetic factors Mouth breathing Tongue thrusting Thumb sucking Mouth breathing leads to vertical growth patterns and open bites. 55 / 94 Category: Orthodontics 55) A patient undergoing 36-month orthodontic treatment. Which teeth are most prone to root resorption? Lower canine Lower central incisor Upper central incisor Upper canine Upper central incisors are most susceptible to root resorption. 56 / 94 Category: Orthodontics 56) A patient complains of an extended orthodontic wire. What should be done? Cut the wire Remove the appliance Wait for next appointment Bend the wire Trimming the wire prevents soft tissue irritation. 57 / 94 Category: Orthodontics 57) What method is used for space analysis in mixed dentition? Carey’s analysis Moyer’s analysis Tanaka and Johnston Bolton analysis Tanaka and Johnston predict space needs in mixed dentition. 58 / 94 Category: Orthodontics 58) Which orthodontic movement causes more resorption in upper teeth? Intrusion Extrusion Tipping Rotation Intrusion of upper teeth often leads to greater root resorption. 59 / 94 Category: Orthodontics 59) What is the ANB angle trend in Class II malocclusion? Increased Normal Decreased Variable Class II cases typically have higher ANB angles. 60 / 94 Category: Orthodontics 60) A child with thumb sucking habit. What is the appropriate action? Refer to a psychologist Ignore the habit Educate parents Give an appliance Parental education is the first step for young children. 61 / 94 Category: Orthodontics 61) A 21-year-old with embedded anterior deep bite. What is the treatment? Intrude upper anterior Camouflage Extrude posterior Orthognathic surgery Extruding posterior teeth helps correct deep bites. 62 / 94 Category: Orthodontics 62) A patient with multiple root resorptions after rapid orthodontic treatment. What is the cause? Infection Excessive force Trauma Genetic factors Rapid movement with high force causes root resorption. 63 / 94 Category: Orthodontics 63) A patient needs serial extraction for severe crowding. What is the next step? Refer to orthodontist Extract as requested No treatment Monitor growth Orthodontic consultation ensures proper serial extraction planning. 64 / 94 Category: Orthodontics 64) A 20-year-old patient with Class 2 malocclusion, 6mm overjet, and normal mandibular alignment. What is the treatment? Growth modification Extraction upper 5 Extraction upper 4 Expansion Extraction of upper first premolars is effective for reducing overjet. 65 / 94 Category: Orthodontics 65) A patient with thin scalloped bone undergoes labial tooth movement. What is the risk? Recession Root resorption Ankylosis Mobility Thin biotypes are prone to gingival recession. 66 / 94 Category: Orthodontics 66) White spots appear 2 weeks after debonding. What is the treatment? No treatment Fluoride varnish Fillings Fluoride gel Fluoride varnish reverses early demineralization. 67 / 94 Category: Orthodontics 67) A pediatric patient with unerupted permanent canine (poor prognosis) and intact primary canine. What is the treatment? Extract and close space Crown on primary canine Leave primary canine Extract primary canine Primary canines are retained if permanent successors are non-viable. 68 / 94 Category: Orthodontics 68) What is the term for mesial resorption and distal bone deposition during tooth movement? Root remodeling Physiological tooth movement Anchorage loss Pathological resorption Physiological tooth movement involves bone remodeling. 69 / 94 Category: Orthodontics 69) A patient in early mixed dentition with unilateral crossbite. What is the treatment? Skeletal expansion Delay treatment Headgear Dental expansion Skeletal expansion corrects unilateral crossbites early. 70 / 94 Category: Orthodontics 70) Which crossbite should be corrected first? Posterior bilateral None Anterior Posterior unilateral Posterior unilateral crossbites affect function and should be prioritized. 71 / 94 Category: Orthodontics 71) What is the most prevalent molar classification in the general population? Class II division 1 Class I Class III Class II division 2 Class I malocclusion is the most common. 72 / 94 Category: Orthodontics 72) A patient with generalized recession after 4 months of orthodontic treatment. What is the cause? High force Poor oral hygiene Thin biotype Systemic disease Excessive force leads to gingival recession. 73 / 94 Category: Orthodontics 73) Tooth 36 is missing, and 37 is mesially tilted. What is needed before implant placement? No preparation Orthodontic uprighting Extraction of 37 Bone grafting Uprighting tilted molars ensures proper implant positioning. 74 / 94 Category: Orthodontics 74) What is the treatment for a gummy smile with 9mm incisor exposure at rest? Lip repositioning Surgery Botox Orthodontics Surgery is definitive for severe gummy smiles. 75 / 94 Category: Orthodontics 75) How far should the film be placed during cephalometric imaging? 20 cm 15 cm 5 cm 10 cm Standard distance ensures accurate cephalometric measurements. 76 / 94 Category: Orthodontics 76) Pseudo-Class III malocclusion is characterized by: None Molar Class 1 Functional shift Skeletal Class 1 It is a dental malocclusion with normal skeletal relationships. 77 / 94 Category: Orthodontics 77) A patient with 1mm gingival recession on lower incisors undergoing orthodontics. Which movement increases recession? Intrusion Extrusion Lingual movement Labial movement Labial movement of lower incisors worsens recession. 78 / 94 Category: Orthodontics 78) What does SNB measure in cephalometrics? Maxillary position Dental inclination Mandibular position Vertical height SNB assesses the anteroposterior position of the mandible. 79 / 94 Category: Orthodontics 79) A 25-year-old patient with protruded upper anterior teeth and good lower arch alignment. What is the treatment? Extraction upper first premolars Headgear Functional appliance Expansion Extraction of upper first premolars retracts protruded upper incisors. 80 / 94 Category: Orthodontics 80) A patient with periodontal inflammation undergoes orthodontics. Where is the center of resistance? More apical At the crown More coronal At the root apex Inflamed periodontium shifts the center of resistance apically. 81 / 94 Category: Orthodontics 81) A 6-year-old with unilateral posterior crossbite and midline shift. What is the treatment? No treatment Functional appliance Rapid expansion Slow expansion (2mm per week) Slow expansion corrects crossbite in mixed dentition. 82 / 94 Category: Orthodontics 82) A patient complains of generalized pain 4 days after starting orthodontic treatment. What should be done? Reassure the patient Refer to prosthodontist Adjust the appliance Prescribe analgesics Initial orthodontic pain is normal and subsides within a week. 83 / 94 Category: Orthodontics 83) A patient has white spots after orthodontics. What should they use? Mouthwash Fluoride gel Toothpaste Fluoride varnish Fluoride varnish remineralizes white spot lesions. 84 / 94 Category: Orthodontics 84) Where is the center of rotation in multirooted teeth? At the furcation At the CEJ At the root apex Above the bifurcation The furcation is the pivot point for multirooted teeth. 85 / 94 Category: Orthodontics 85) A patient has an ANB angle of -5°. What is the classification? Class I Class III malocclusion None Class II Negative ANB angles indicate Class III skeletal relationships. 86 / 94 Category: Orthodontics 86) What does a periodontist perform to expedite orthodontic treatment? Frenectomy Gingivectomy Bone grafting Alveolar decortication Decortication stimulates bone remodeling for faster movement. 87 / 94 Category: Orthodontics 87) A patient complains of pain after starting orthodontics. What should be done? Reassure the patient Prescribe painkillers Refer to specialist Adjust the appliance Initial orthodontic pain is normal and temporary. 88 / 94 Category: Orthodontics 88) A patient has 26mm space available but 25mm required. What is the diagnosis? Bolton discrepancy None Crowding Spacing Excess space indicates spacing. 89 / 94 Category: Orthodontics 89) Upper central incisors are normal, but lower centrals are deep behind the uppers, causing palatal problems. What is this called? Crossbite Open bite Bite impingement Deep bite Bite impingement occurs when lower incisors traumatize the palate. 90 / 94 Category: Orthodontics 90) What is a tissue-borne maxillary expansion device? Hyrax appliance Haas appliance Quad helix W-arch Haas appliances are tissue-borne and used for maxillary expansion. 91 / 94 Category: Orthodontics 91) What type of force is ideal for orthodontic tooth movement? No force Heavy intermittent Light continuous Variable Light continuous forces are most physiological. 92 / 94 Category: Orthodontics 92) What is the camouflage treatment for Class II without crowding? Extraction upper 4 Functional appliance Headgear Extraction lower 4 Extraction of upper first premolars is preferred for Class II without crowding. 93 / 94 Category: Orthodontics 93) An adult with retained #53 (good alignment, no resorption) and impacted #13 (poor prognosis). What is the treatment? Leave #53 Crown on #53 Extract and implant Orthodontic alignment Retained primary canines with good prognosis can be preserved. 94 / 94 Category: Orthodontics 94) A patient with poor oral hygiene and white spots after debonding. What is the treatment? SRP Antibiotics Fluoride varnish Fluoride gel Fluoride varnish is effective for post-orthodontic white spots. Your score is The average score is 68% Facebook Twitter 0% Restart quiz Please rate this exam and leave a comment with any notes or suggestions. Anonymous feedback Thank you for your feedback Send feedback Facebook X LinkedIn Messenger Messenger WhatsApp Telegram Print Share Facebook X LinkedIn Pinterest Reddit Messenger Messenger WhatsApp Telegram Share via Email Print
