Cement used for orthodontic brackets to tooth is-
সঠিক উত্তর
সঠিক উত্তর: Resin cement
সঠিক উত্তর
সঠিক উত্তর: Resin cement
ভুল বা সঠিক হলে সাথে সাথেই ব্যাখ্যা সহ উত্তর দেখতে পারবেন।
Ideal age of interceptive orthodontics is -
Interceptive orthodontics aims to intercept and correct a developing malocclusion at an early stage, before it becomes fully established. This window corresponds to the mixed dentition period (roughly 6–12 years), when both primary and permanent teeth are present. During this period, problems such as crossbites, crowding, habits (thumb sucking), and arch-length discrepancies can be corrected more easily because the jaws are still growing and teeth are still erupting, making treatment simpler and more effective than after the permanent dentition is fully established.
Reference: Proffit WR, Fields HW, Sarver DM. Contemporary Orthodontics, 6th ed. Chapter on Early Treatment (Interceptive Orthodontics).
মেডিকেল বিষয়ে ১০ টি গুরুত্বপূর্ণ প্রশ্ন
১০ মার্কের MCQ কুইজএই প্রশ্নের বিশেষজ্ঞ বিশ্লেষণ
Direct bonding of orthodontic brackets to enamel is most commonly achieved using a light-cured (or chemically-cured) composite resin adhesive/resin cement, which bonds to acid-etched enamel via micromechanical retention and provides high bond strength suitable for withstanding orthodontic forces. Glass ionomer cement is sometimes used for banding molar teeth (especially in high-caries-risk patients, for its fluoride release), but for bonding brackets directly to tooth surfaces, resin cement is the material of choice.
Reference: Proffit WR, Fields HW, Sarver DM. Contemporary Orthodontics, 6th ed. – Bonding Materials.
রেফারেন্স মাত্র
মেডিকেল বিষয়ের আরও প্রশ্ন