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