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Make mcq quiz with 4 option in which one is correct -'10 Basis of Material Science • .....;;;";;;"~~;;,,;;,,,,;.;.,,;;,,,;,,;.;,.,------------ 6. Temporary materials: Some materials are meant to be placed in the oral cavity for a short period of time for different reasons. • Temporary crowns: While a permanent crown is prepared in the dental laboratory, the patient must wait for few days before it can be fabricated and cemented into place. Does patient experience any problems during this time period? If the tooth is vital (the pulp is alive), the patient is likely to experience pain and sensitivity while eating and drinking, also it looks unesthetic. What can be done to solve this problem? A temporary crown is placed before the patient leaves the clinic. It is constructed and luted in the same appointment in which the crown preparation is done. Temporary crowns are not very strong or esthetic but they serve adequately till the permanent crown is ready to be cemented. • Temporary restorations: Sometimes it is difficult to decide immediately the best line of treatment for a particular tooth. The exact condition of the pulp may not be obvious to the dentist from the patient's symptoms. A dentist removes all or part of the decay and then places a temporary restoration to have time to observe the behaviour of the pulp or to give the pilip time to heal before deciding the further treatment required. Classification based on Location of Fabrication 4,9 Materials can be classified based on the location of fabrication into: • Direct restorative materials. • Indirect restorative materials Direct restorative materials: They include those materials which are used to restore cavity preparations directly in the oral cavity (Box 1.5). Box 1.5: Examples of direct restorative materials Amalgam, composites, glass ionomer and other materials, which set by chemical reactions in the mouth. Indirect restorative materials: It includes those restorations which must be fabricated outside the mouth, indirectly on a cast/ model/ die, because their processing condition would harm oral tissues. Materials used in the construction of such prosthesis are called indirect restorative materials (Box 1.6). Box 1.6: Examples of indirect restorative materials Gold inlays, crowns of metal, ceramic and polymers, which are processed at elevated temperatures. Some indirect composite restorations can be processed under specific wavelength of light, e.g. Ceramage. Classification based on Longevity of Use 1. Permanent restorations: These restorations are not planned to be replaced for a particular time period. Though they are referred to as permanent, actually they are not, e.g. fillings, crowns, bridges and dentures do not last forever (Fig. 1.5). 2. Temporary restorations: These restorations are planned to be replaced in a short period of time, such as few days to weeks. For ~ Permanent C/) c c -.2 0 c- :;::; Cll co Interim ~ Q; 0 .8ll::1iJ C/) o~ Cll a:: c:=:J Temporary Time period Fig. 1.5: Diagram depicting the time period of use of a restoration. (Arrow in permanent restoration depicts that such restorations are not planned to be replaced for a long period of time.) Introducton to Dental Materials Dental materials Box 1.7: Characteristics of metals 1. High thermal and electrical conductivity 2. Ductility (pure metals are very soft and they can be bent without breaking) 3. Opacity (they do not transmit light) 4. Luster (they have a surface that strongly reflects light and appears bright and shiny) 5. They tend to dissolve to some extent in water or other aqueous solutions, producing cations. 6. All metals are white (actually gray) except for gold, which is yellow, and copper, which is reddish. 7. All metals are solid at room temperature except mercury, which is liquid at room temperature and is used with silver alloys as amalgam. 8. All metals have high melting temperatures because of high strength of the metallic bond that holds the atoms together. 3. Polymers 4. Composites Composites are mixtures of two or more of the first three classes in which the different components remain distinct from one another in the final structure. A common example is composite resin. Fig. 1.7a: Three-dimensional structure of iron (metal) Metals Metals are the oldest of the three classes of materials that have been used as dental materials. Metals are characterized by metallic bonds (Box 1.7) which will be discussed in the next chapter. Metals solidify with their atoms in a regular or crystalline arrangement (see Chapter 2), often in the form of a cube (Fig. 1.7a). example, temporary fillings done in a tooth during root canal treatment, which have to be replaced within 2-4 days during subsequent visits. They are used to protect the tooth and provide function till the final restoration is done. 3. Interim restoration: At times, dental treatment requires "long-term" definite temporary restorations or "interim" restorations. For examle, a 7-year-old child, met with trauma and fractured one of his central incisors. A large composite build- up may serve his immediate requirement until the root formation is completed and a permanent crown is placed. 5 Classification based on the Chemical Nature of the Material These are the atoms that make up a material and the way they are bonded together determine the properties of that materiaLS Weak bonds make for weak materials and vice versa (Table 1.4). Materials can be classified into different categories based on their primary atomic bonds (Fig. 1.6): 1. Metals 2. Ceramics Fig. 1.6: Classification of dental materials based on chemical nature 12 Basis of Material Science Box 1.9: Benefits of ceramics in dentistry 1. Many ceramic oxides are used as pigmenting agents. These oxides produce good range of colors. Due to this characteristic, we are able to match almost any tooth color with good esthetic results. 2. They are inert, i.e. not chemically reactive. This quality provides ceramics with good bio- compatibility. 3. Ceramic materials are translucent, like natural teeth. This translucency gives the ceramic crown a more natural appearance than any other dental material. Fig. 1.7b: Internal arrangement of tetrahedral structure of ceramic (silica) four large oxygen atoms surround smaller silicon atom Ceramics A ceramic is a compound formed by the union of a metallic and a non-metallic element (Box 1.8). Most of these materials are oxides, formed by the union of oxygen with metals such as silicon, aluminum, calcium and magnesium (Fig.1.7b). Ceramics may be simple or complex. Examples of simple ceramics are alumina and silica. Examples of complex ceramics are feldspar (potassium aluminum silicate) and kaolin (hydrated aluminum silicate). Ceramics may be crystalline or non- crystalline (i.e. amorphous). Porcelain is a specific type of ceramic used extensively in dentistry (Box 1.9). Box 1.8: Characteristics of ceramics 1. High melting points. 2. Brittleness, which means they cannot be bent or deformed (no sliding) to any extent without actually cracking and breaking. 3. They are poor conductor of heat and electricity. 4. They are chemically inert. 5. They have excellent esthetic result in terms of matching natural teeth. Fig. 1.8: Stucture of synthetic polymer Polymers They are the latest addition (early to mid- 1900s) to dental materials. Most of the polymers are nowadays synthesized by humans. Polymers are giant, long-chain organic molecules (Fig. 1.8). Polymers are characterized by covalent bonds within each molecule, giving them tremendous strength in a single direction. Try to break a nylon rope by pulling it! They are poor conductors of heat and electri- city. Most polymers have a structure containing thousands of carbon atoms linked together like beads on a string. Others, such as silicone polymers are formed with silicon-oxygen bonds. Introducton to Dental Materials Table 1.4: Characteristics of different materials 13 Characteristics Bond Properties Crystal structure Metals Metallic bonding High strength and hardness, high electrical and thermal conductivity BCC, FCC, or HCP unit cells Ceramics Ionic or covalent bonding, or both High hardness and stiffness, electrically insulating, refractory, and chemically inert Crystalline or amorphous Polymers Covalent bonding Low sensitivity, high electrical resistivity, and low thermal conductivity, strength and stiffness vary widely Amorphous and crystalline Composites Composites are combinations of any of the basic ceramic, metallic and polymeric materials (Box 1.10). Each material that makes up composites is called a phase. Their properties tend to be somewhere between those of their basic constituents and are used to enhance their performance, longevity and handling chracterstics. Box 1.10: Types of composites in dentistry 1. Ceramic - metallic composite: Tungsten carbide bur. 2. Metal - polymer composite: Die materials in dental laboratory. 3. Ceramic - polymer composite: Enamel, dentin, bone and restorative composites. A composite is a kind of "combination" of materials, which compliment each other. The properties lacking in one material are compensated by those of the other material. For example, restorative composite has two phases, namely resin and fillers. Teeth and bones are examples of natural composites. Enamel is a composite of hydroxyapatite (which is a ceramic material) and protein (which is a polymer). EVALUATION OF DENTAL MATERIALS Most manufacturers of dental materials maintain a quality assurance programme (As per international standard like ADA specifications) and materials are thoroughly tested before being released into the market for dental practitioner (Fig. 1.9). Laboratory Evaluations Most ADA/ ANSI specifications involve laboratory tests. The tests performed as per these specifications are useful but they all are performed in vitro, (carried out in the laboratory away from the clinical conditions) which have a lot of limitations in clinical practice.lO Clinical Notes 1. For example, most of the direct restorative materials are tested for their compressive strength but ultimately the material is subjected to a combination of compressive, tensile and shear stresses, which may decide the final success or failure of the material under masticatory load. 2. Similarly upper dentures mostly fracture along the midline because of bending. Hence a bending or transverse strength ~B-a-s-is-o-f-M-a-t-e-ria-I-S~c-ie-n-c-e-------------- ---------. test is far more meaningful for denture base materials than a compression test. Clinical Trials The majority of new materials are subjected to extensive clinical trials normally in co-operation with a dental college or hospital departments prior to their release. CONCLUSION As the number of available materials is going up, it is important that the dentist remains more aware about new products so that their judgement about the selection of material remains successful. Materials which have not been thoroughly evaluated should be avoided, specially with clinical dentistry falling under Consumer Protection Act (CPA). I Research and development I iI Manufacturer/analysis Ideal requirements for clinical use: Thermal, optical, mechanical, chemical, biological Available materials and their properties are evaluated Launch of new I product Choice and selection of material by the dentist Critical assessment based on clinical performance I I H feedback to IGenerate kindness images where the children can find out the images where there they need to do the help or ignore like that images I want in the quiz Billy gets lost. Billy is a puppy. He lives in a big house with a blue roof. He loves to play fetch with Emmy. Emmy throws the ball. Billy chases it. Then, Billy sees Cat. He drops the ball and chases Cat. Cat runs down the street, and Billy chases him. Emmy cries, “Come back, Billy.” Cat runs through a farm, and Billy chases him. Cat runs into the forest, and Billy chases him. Cat climbs up a tree. Billy turns to go home. He cannot see the big house with a blue roof.“ Oh, no, I am lost,” Billy says. Billy runs down a path. He sees Fox. “How can I get home?” he asks Fox. “I have never been out of the forest,” says Fox. “Ask Cow in the farmer’s field,” Fox says. Billy runs to the farmer’s field. Billy says to Cow, “I am lost. “Do you know the way to my house?” Billy asks. “I have never been off the farm,” says Cow. “Ask Owl,” Cow says. Billy goes to Owl in the barn. “Please wake up, Owl,” says Billy. “I need your help,” he says. “I am lost!” he cries. “Do you know a big house with a blue roof?” Billy asks. “Yes, I do,” Owl says. Owl flies, and Billy chases her. Then, Billy sees Emmy at the big house with a blue roof. “Thank you, Owl,” says Billy. Create an interactive "fill the gaps" quiz in seconds - complete with a 'Hall of Fame'! Instructions: 1. Edit the title of this quiz (above) to something appropriate. 2. COPY and PASTE your text into this box (TIP - plain text for best results, to avoid formatting glitches), and edit it as you wish. 3. DOUBLE-CLICK any word to turn it into a 'gap'. 4. To put the word back, simply double-click the gap again or drag the word from the top of the screen to the correct gap. 5. When you are finished, click 'save' to turn your work into an interactive quiz for your students - complete with a Leaderboard so you can see how quickly they finished! Note: When you save your work, you will provide a password which will allow you to edit the quiz again later. Create a quiz with these questions: Tempo – Questions What Italian word means "slow"? What tempo marking means “lively” or “fast”? What tempo marking means “walking pace”? What word is used for “very fast” tempo? What do we call a gradual change in tempo? What term means to return to the original tempo? 🔊 Dynamics – Questions What symbol tells you to play loudly? What dynamic marking means “very soft”? What is it called when music suddenly becomes soft? What dynamic term means to gradually get louder? What do mp and mf stand for? What two markings show extreme contrast in dynamics? 📝 Note Values – Questions What note gets one beat in 4/4 time? What kind of note gets half a beat? Two of what type of note equal a whole note? What note has a stem, is filled in, and has one flag? What kind of dot adds half the value of the note it follows? What combination of notes equals a dotted quarter note? 📏 Time Signatures – Questions What time signature has 2 beats per measure? What time signature is used for waltzes? What time signature is used in marches? What does the top number in a time signature tell us? In 4/4 time, how many beats are in 3 quarter notes and 1 eighth note? What time signature is called “compound duple” and used in Irish jigs? 📻 Current Music Info – Questions Which artist had the highest-grossing tour by 2025? What is the most-used music streaming service in 2025? What music genre continues to top the Billboard charts in 2025? Which artist released a surprise double album in 2024? What tech company released a hit AI-generated song? Who is the youngest artist to win Album of the Year twice? 🎺 Instruments & Timbre – Questions What instrument family includes the violin and cello? What family do the flute and clarinet belong to? What instrument has black and white keys and is both string and percussion? Timbre describes what aspect of a sound? What word describes how instruments are combined in an arrangement? What double reed instrument often plays the tuning note in an orchestra?Create a multiple-choice quiz for 5th grade English learners (CEFR A1–A2 level) based on the following reading text. Text: Mari Copeny is a special girl. She helped her city get clean water. Mari lives in a city called Flint in the USA. In 2014, there was a big water problem in Flint. Mari wanted to do something. She decided to send a letter to the president of the USA. His name was Barack Obama. President Obama was angry about the dirty water in Flint. He wanted to help. He visited Flint and learned about the water problem. He helped the city get clean water. Mari is happy her letter helped Flint. She also wants to change other things. One day, Mari wants to be president of the USA. She plans to make life better for many people. Instructions for the quiz: • Create 8–10 multiple-choice questions. • Each question should have 4 answer options (A, B, C, D). • Mark the correct answer. • Use simple language suitable for 5th grade ESL learners. • Focus on comprehension of the text (who, where, why, what happened, sequence of events). • Include at least one question about Mari’s future goal.### Quizalize Script: **"Millennial TV & Celeb Quiz Challenge"** #### Quiz Introduction: - **Title**: "Millennial TV & Celebrity Quiz Challenge 📺✨" - **Description**: "Are you ready to prove your 2000s pop culture expertise? Answer these fun questions to show off your TV and celebrity knowledge! Invite your friends and see who comes out on top!" - **Gamified Element**: - Enable Quizalize’s leaderboard feature to track scores as users compete in real-time. #### Question 1: - **Prompt**: "Who said this iconic line? *‘How YOU doin’?’* 👀" - **Answer Options**: 1. Ross (Friends) 2. Joey (Friends) 3. Chandler (Friends) - **Correct Answer**: Joey (Friends) - **Feedback**: - **Correct**: "🎉 You got it! Joey Tribbiani’s catchphrase is unforgettable. 👏🍕" - **Incorrect**: "❌ Oops! It’s Joey from *Friends*! Now we need to binge-watch, don’t we?" - **Gamified Feature**: Award bonus points for quick answers, encouraging fast responses. #### Question 2: - **Prompt**: "Which show features these 4 iconic New Yorkers? 👠✨" - **Answer Options**: 1. Gossip Girl 2. The OC 3. Sex and the City - **Correct Answer**: Sex and the City - **Feedback**: - **Correct**: "👏 Yesss! It’s *Sex and the City*! Samantha, Carrie, Miranda, and Charlotte are forever icons. 💅" - **Incorrect**: "Oh no! It’s *Sex and the City*. Make some time for a glam-filled NYC binge session!" - **Visual Add-on**: Include an animated NYC skyline background or glittery graphics for correct answers. #### Question 3: - **Prompt**: "Which celeb famously shaved her head in the 2000s? 👩🎤" - **Answer Options**: 1. Britney Spears 2. Christina Aguilera 3. Lindsay Lohan - **Correct Answer**: Britney Spears - **Feedback**: - **Correct**: "👏 Yep, it’s Britney! A legendary moment in pop culture history. 👸🎤" - **Incorrect**: "Not quite! The answer is Britney Spears. That iconic moment is unforgettable!" - **Audio Elements**: Add a drumroll sound for suspense before revealing the answer. #### Final Score Screen: - **Score Tiers**: - **High Score (100%)**: "🎉 You’re a 2000s pop culture master! Share your score and challenge your friends to top it!" - **Medium Score (50-99%)**: "👏 Not bad! You’re almost an expert. Share your score and invite others to play!" - **Low Score (Below 50%)**: "😅 Looks like you need a refresh on 2000s pop culture. Share your score and dare your friends to do better!" - **Gamified Feature**: - Enable the "Challenge a Friend" option in Quizalize to spark competition. - Include a timer extension for players to decrease stress during tricky questions. #### Call-to-Action: - **Prompt**: "How well did you do? Share your results and invite your friends to join the fun! 👇" - **End Message**: "✨ Follow us for more fun quizzes! Who’s ready for the next challenge?" #### Design & Interactive Elements: - **Visual Enhancements**: Use animated GIFs or static pop culture images (e.g., retro TV screenshots, Britney Spears visuals) to visually set the tone for the quiz. - **Audio Elements**: Add celebratory sound effects when revealing correct answers or upon quiz completion. - **Gamified Elements**: Reward streak bonuses for consecutive correct answers to keep players engaged and competitive. This script is tailored for Quizalize, leveraging its gamification features and interactive design options to create a fun and engaging quiz that users will enjoy while fostering friendly competition!Here is a list of 15 Shoroshim from Parshas Vayishlach, Perek 32. They are Shoroshim from our L'havin book 7A page 23. Please make multiple choice quiz to be given to the class. List: גור live/sojourn צרר distress (great pain and worry)/oppress חצה divide/halve נכה hit/smite יטב do/be good קטנ be small נצל save פגש meet/plead כפר clean/cleanse/wipe יתר remain אבק wrestle (fight) יקע dislocate שרה fight/struggle זרח shine צלע limp use all 15 shoroshim. Make the following info into a quiz: Questions (20) Show answers 1 - Quiz I ________ this would be difficult. 20sec 2 - Quiz She ______ a good lesson. 20sec 3 - Quiz Even ________ we are tired, we can do this. 20sec 4 - Quiz That's a ______ question. I don't know the answer. 20sec 5 - Quiz Have a _______ look through your exam paper before you hand it in. 20sec 6 - Quiz I received 10 calls from your mom _____ the day - just call her back! 20sec 7 - Quiz He wore shorts even ______ it was cold. 20sec 8 - Quiz The elephant's skin is very ______. 20sec 9 - Quiz What a great _____ to bring her flowers! 20sec 10 - Quiz We drove _______ a storm. 20sec 11 - Quiz We made it ______ the first semester. 20sec 12 - Quiz I need a _____ report on the latest trends in online shopping. 20sec 13 - Quiz I liked her outfit, I didn't like her accessories _____. 20sec 14 - Quiz We were _____ a lot by the pandemic. 20sec 15 - Quiz I have never _____ about relocating. 20sec 16 - Quiz She looked ______ the magazine. 20sec 17 - Quiz We went ________ the tunnel. 20sec 18 - Quiz That was a ______ hike! I am tired. 20sec 19 - Quiz The house was renovated _____ - everything is new, even windows. 20sec 20 - Quiz Wait a moment, I'll put you _____ to the sales department.