FAGD Exam - Orthodontics Questions And Answers | 2025 ,2026 Updated Solutions | 100% Correct Answers

Maxillary fixed bilateral space maintainer is also known as? Nance appliance If both primary canines were present, what appliance could be used in place of a Nance appliance (maxillary fixed bilateral space maintainer)? Band and loop (bilateral) What situation is a Nance appliance appropriate for? Premature bilateral loss of maxillary primary teeth What are the 4 properties of ideal wire material? 1. High strength 2. Low stiffness 3. High working range 4. High formability Stainless steel wire characteristics - good mechanical properties - excellent corrosion resistance - low cost - highest modulus of elasticity - lowest spring back - 18% chromium, 8% nickel 8/5/25, 1:05 PM FAGD Exam - Orthodontics Flashcards | Quizlet titanium orthodontic wires Stainless steel has a high modulus of elasticity and a lower resilience NiTi orthodontic wire characteristics Offer a highly desirable combination of low modulus of elasticity and extremely wide working range Benefits of the Hawley retainer? - palatal coverage makes it possible to incorporate a bite plant lingual to the upper incisors to control bite depth - What is the major source of anchorage in a Hawley appliance? Palatal coverage Prior to direct bonding, ________ is used as an etching agent. Prior to placing bands, ________ is used as an etching agent? 35-50% unbuffered phosphoric acid Nothing Indications for using bands instead of banded brackets? (4) 1. To provide better anchorage for greater tooth movement 2. For teeth that will need both lingual and labial attachment 3. Teeth with short clinical crowns 4 Tooth surfaces that are incompatible with successful bonding What is the "anchorage value" of any tooth? It is roughly equivalent to its root surface area (the same as the periodontal ligament area) 8/5/25, 1:05 PM FAGD Exam - Orthodontics Flashcards | Quizlet types? 1. Reciprocal tooth movement: is produced when two teeth or resistance units of equal size are moved against each other and move the same amount toward or away from each other. 2. Reinforced anchorage: is accomplished by adding additional teeth to the unit to distribute the force over a larger root surface area in the anchorage unit. Note: Another method for reinforcing anchorage would be to add an extraoral force such as headgear or interarch elastics. 3. Stationary anchorage: displacement of anchor teeth can be minimized by arranging the force system so that anchor teeth must move bodily (translation) if at all, while movement teeth are allowed to tip. This approach is called "stationary anchorage." 4. Cortical anchorage: anchor teeth roots are moved into cortical bone which resorbs more slowly than does medullary bone. This situation may be encountered at an old extraction site, it can be almost impossible to close such an extraction site, because tooth movement is slowed to a minimum as the roots encounter cortical bone along the resorbed alveolar ridge. 5. Implants for anchorage: implants can serve as anchorage for holding or moving teeth. The implant (if stable) will not move because it has no PDL 8/5/25, 1:05 PM FAGD Exam - Orthodontics Flashcards | Quizlet consists of a cervical neck strap (as anchorage) and a standard facebow inserting into the headgear tubes of the maxillary first molar attachments. The objectives of treatment with these types of headgear are to restrict anterior growth of the maxilla and to distalize and erupt maxillary molars. A major disadvantage of treatment using cervical headgear is possible extrusion of the maxillary molars. Likely results include: opening the bite, first molars will move distally and forward growth of the maxilla will decrease. Indications: Class II malocclusions with deep bite