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Certified Dental Assistant (CDA) 2025


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Question: 214


Which of the following dental specialties focuses on the alignment and correction of irregularities in the position of the teeth and jaws?


ral and maxillofacial surgery ndodontics

rthodontics edodontics


wer: C


anation: The dental specialty thatfocuses on the alignment and correct egularities in the position of the teeth and jaws is orthodontics. odontists are dental specialists who diagnose, prevent, and treat dental

irregularities, such as misaligned teeth and malocclusions. They use es, aligners, and other orthodontic appliances to gradually move and a eeth and jaws into proper position, improving both function and aesth


stion: 215


ch of the following dental radiographs is used to examine the root tures and surrounding bone of a single tooth?

  • O

  • E

  • O

  • P


  • Ans


    Expl ion

    of irr

    Orth and

    facial

    brac lign

    the t etics.


    Que


    Whi struc


    1. Bitewing radiograph

    2. Periapical radiograph

    3. Panoramic radiograph

    4. Occlusal radiograph

    Explanation: A periapical radiograph is used to examine the root structures and surrounding bone of a single tooth. It captures the entire tooth, from the crown to the root, and provides detailed information about the tooth's condition, including the presence of infections, abscesses, or bone loss.


    Question: 216


    is the purpose of a dental dam during dental procedures?


    isolate and protect the treatment area clean and disinfect dental instruments provide anesthesia to the patient

    assist with tooth extraction procedures wer: A

    anation: The purpose of a dental dam is to isolate and protect the treat uring dental procedures. It helps in keeping the area dry and free fro amination, improving visibility and preventing the spread of saliva an

    s.


    stion: 217


    ch of the following dental instruments is used to remove carious denti ng cavity preparation?

    What


    1. To

    2. To

    3. To

    4. To


    Ans


    Expl ment

    area d m

    cont d oral

    fluid


    Que


    Whi n

    duri


    1. Spoon excavator.

    2. Gingival retractor.

    3. Condensing pliers.

    4. Crown and bridge scissors.

    Explanation: A spoon excavator is a dental instrument specifically designed for the removal of carious dentin during cavity preparation. Its spoon-shaped working end allows for effective excavation of decayed tooth structure.


    Question: 218


    mel due to acid erosion?


    ental caries ental fluorosis

    entin hypersensitivity ooth abrasion


    wer: B


    anation: Dental fluorosis is the dental condition characterized by the l oth enamel due to excessive exposure to fluoride during tooth lopment. It can result in white or brown stains on the teeth and, in sev

    enamel pitting.


    stion: 219


    ch of the following dental materials is commonly used for taking bite trations?

    Which of the following dental conditions is characterized by the loss of tooth ena


    1. D

    2. D

    3. D

    4. T


    Ans


    Expl oss

    of to

    deve ere

    cases,


    Que


    Whi regis


    1. Alginate

    2. Zinc oxide-eugenol

    3. Polyvinyl siloxane

    4. Glass ionomer

    Explanation: Polyvinyl siloxane is a commonly used dental material for taking bite registrations. It is highly accurate, has good dimensional stability, and provides detailed reproduction of occlusal relationships.


    Question: 220


    A)?


    ssisting the dentist during dental procedures aking patient X-rays

    dministering local anesthesia erforming dental cleanings


    wer: D


    anation: Performing dental cleanings is typically not within the scope ice for a Certified Dental Assistant (CDA). CDAs primarily assist de ng dental procedures, take patient X-rays, and may assist in administer

    anesthesia under the dentist's supervision.


    stion: 221


    ch of the following dental instruments is commonly used for removing cted wisdom tooth?

    Which of the following is not a primary function of a Certified Dental Assistant (CD


    1. A

    2. T

    3. A

    4. P


    Ans


    Expl of

    pract ntists

    duri ing

    local


    Que


    Whi an

    impa


    1. Surgical curette

    2. Periosteal elevator

    3. Luxator

    4. Dental elevator

    Explanation: A dental elevator is commonly used for removing an impacted wisdom tooth. Dental elevators are designed to apply controlled forces to luxate and elevate teeth from the socket during extraction procedures. They come in various shapes and sizes to accommodate different tooth positions and access areas.



    ch of the following dental materials is commonly used for the fabricati al crowns?


    omposite resin

    lass ionomer cement orcelain

    malgam wer: C

    anation: Porcelain is commonly used for the fabrication of dental cro elain crowns are known for their natural appearance and are often use ring teeth in the esthetic zone. They can closely mimic the color and lucency of natural teeth.


    stion: 223

    Question: 222


    Whi on of

    dent


    1. C

    2. G

    3. P

    4. A


    Ans


    Expl wns.

    Porc d for

    resto trans


    Que


    Which dental specialty focuses on the treatment of gum diseases and conditions?


    1. Orthodontics

    2. Endodontics

    3. Periodontics

    4. Prosthodontics Answer: C


    stion: 224


    ch of the following dental instruments is used to remove sutures after cal procedure?


    eriodontal probe. emostat.

    caler. xcavator.


    wer: B


    anation: A hemostat, also known as a surgical forceps, is a dental ument used to remove sutures after a surgical procedure. Its pointed ti ocking mechanism allow for secure grasping and controlled removal o es.

    Explanation: Periodontics is the dental specialty that focuses on the prevention, diagnosis, and treatment of gum diseases and conditions. Periodontists specialize in the supporting structures of teeth, such as gums, bone, and connective tissues.


    Que


    Whi a

    surgi


    1. P

    2. H

    3. S

    4. E

    Ans Expl

    instr ps

    and l f

    sutur


    Question: 225


    Which of the following dental instruments is used for the removal of calculus and plaque from the teeth?


    1. Mouth mirror.

    2. Periodontal probe.

    3. Scaler.

    4. Excavator. Answer: C


    stion: 226


    ch of the following is a benefit of becoming a Certified Dental Assista A)?


    igher salary compared to non-certified dental assistants xemption from continuing education requirements

    bility to perform complex dental procedures independently imited job opportunities in the dental field


    wer: A


    anation: One of the benefits of becoming a Certified Dental Assistant

    A) is the potential for a higher salary compared to non-certified dental tants. Certification demonstrates a higher level of knowledge and skill h can result in increased earning potential.

    Explanation: A scaler is a dental instrument specifically designed for the removal of calculus and plaque from the teeth. It has a pointed tip and a curved or angled working end that allows for effective scaling of the tooth surfaces.


    Que


    Whi nt

    (CD


    1. H

    2. E

    3. A

    4. L

    Ans Expl

    (CD

    assis ,

    whic


    Question: 227


    Which of the following dental specialties focuses on the surgical treatment of diseases, injuries, and defects of the oral and maxillofacial region?


    1. Endodontics

    2. Orthodontics

    3. Oral and maxillofacial surgery

    4. Prosthodontics Answer: C

    of procedures, including tooth extractions, jaw surgeries, and facial nstructive surgeries.


    stion: 228


    is the purpose of a dental dam clamp during the placement of a dent


    stabilize the dental dam and prevent it from slipping secure the dental dam to the patient's face

    protect the patient's lips and cheeks anchor the dental dam to individual teeth


    wer: D


    anation: The purpose of a dental dam clamp during the placement of a al dam is to anchor the dental dam to individual teeth. It helps to creat seal around the tooth being treated and prevents the dental dam from

    Explanation: Oral and maxillofacial surgery is the dental specialty that focuses on the surgical treatment of diseases, injuries, and defects of the oral and maxillofacial region. Oral and maxillofacial surgeons are trained in a wide range

    reco


    Que


    What al

    dam?


    1. To

    2. To

    3. To

    4. To

    Ans Expl

    dent e a

    tight

    sliding or dislodging during the procedure.


    Question: 229


    Which dental material is commonly used for taking impressions of edentulous (toothless) arches?

    1. Alginate

    2. Polyvinyl siloxane

    3. Zinc oxide-eugenol

    4. Dental composite resin Answer: A

    es. It is a fast-setting and cost-effective material that provides good de oduction of the oral tissues.


    stion: 230


    ch dental specialty focuses on the alignment and positioning of teeth a


    ndodontics rthodontics eriodontics rosthodontics


    wer: B


    anation: Orthodontics is the dental specialty that focuses on the align ositioning of teeth and jaws. Orthodontists use braces, aligners, and o ances to correct malocclusions and improve the esthetics and function

    Explanation: Alginate is commonly used for taking impressions of edentulous arch tail

    repr


    Que


    Whi nd

    jaws?


    1. E

    2. O

    3. P

    4. P


    Ans


    Expl ment

    and p ther

    appli of

    the dentition.


    Question: 231


    Which of the following dental specialties focuses on the alignment and positioning of teeth and jaws?

    1. Endodontics

    2. Periodontics

    3. Orthodontics

    4. Prosthodontics Answer: C

    ositioning of teeth and jaws. Orthodontists use braces, aligners, and o odontic appliances to straighten teeth and correct malocclusions (impr

    ).


    stion: 232


    ch of the following dental materials is commonly used as a temporary g material and for root canal obturation?


    omposite resin malgam

    utta-percha orcelain


    wer: C


    anation: The dental material commonly used as a temporary filling rial and for root canal obturation is gutta-percha. Gutta-percha is a ru

    Explanation: Orthodontics is the dental specialty that focuses on the alignment and p ther

    orth oper

    bites


    Que


    Whi fillin


    1. C

    2. A

    3. G

    4. P

    Ans Expl

    mate bbery

    material derived from the sap of certain trees. It is used in dentistry as a filling material for temporary restorations and for filling and sealing the root canal space during root canal treatment. Gutta-percha provides a good seal and helps prevent reinfection of the root canal system.


    Question: 233

    Which of the following dental materials is commonly used for indirect restorations, such as crowns, inlays, and onlays?


    1. Composite resin

    2. Amalgam

    3. Porcelain

      wer: C


      anation: The dental material commonly used for indirect restorations, owns, inlays, and onlays, is porcelain. Porcelain is a ceramic material e fabricated to closely resemble the natural color and translucency of It is highly resistant to staining and provides excellent aesthetics and

      bility for long-term dental restorations.


      stion: 234


      ch of the following dental imaging techniques is commonly used to uate the tooth roots and surrounding bone?


      itewing radiographs anoramic radiograph

      one beam computed tomography (CBCT) eriapical radiographs

      Gutta-percha Ans

    Expl such

    as cr that

    can b teeth. dura


    Que


    Whi eval


    1. B

    2. P

    3. C

    4. P


    Answer: D


    Explanation: Periapical radiographs are commonly used to evaluate the tooth roots and surrounding bone. Periapical radiographs capture a detailed image of a specific tooth from the crown to the root tip, including the surrounding bone structure. They are useful for detecting dental caries, assessing root canal treatments, evaluating periodontal conditions, and identifying abnormalities in

    the tooth roots or supporting bone. Bitewing radiographs are primarily used to detect interproximal caries, panoramic radiographs provide an overview of the entire dentition and surrounding structures, and cone beam computed tomography (CBCT) is a 3D imaging technique used for more complex diagnostic purposes.


    Question: 235


    ch of the following dental radiographs is used to evaluate the relations een the teeth and the temporomandibular joints?


    eriapical radiograph. itewing radiograph. cclusal radiograph. anoramic radiograph.


    wer: C


    anation: An occlusal radiograph is used to evaluate the relationship een the teeth and the temporomandibular joints. It provides a broad vi

    maxillary or mandibular arch and can help identify any abnormalitie ders affecting the joints.


    stion: 236


    ch zone in the dental operatory is responsible for maintaining aseptic

    Whi hip

    betw


    1. P

    2. B

    3. O

    4. P

    Ans Expl

    betw ew

    of the s or

    disor


    Que


    Whi

    conditions and handling instruments?


    1. Transfer zone

    2. Assistant's zone

    3. Operator's zone

    4. Disposal zone

    Answer: B


    Explanation: The Assistant's zone in the dental operatory is responsible for maintaining aseptic conditions and handling instruments. The dental assistant works in this zone to provide support to the dentist during procedures.


    Question: 237


    ch of the following is a common side effect of prolonged use of antibi


    erostomia (dry mouth) alitosis (bad breath) achycardia (rapid heart rate) andidiasis (oral thrush)


    wer: D


    anation: Candidiasis, also known as oral thrush, is a common side eff onged use of antibiotics. Antibiotics can disrupt the natural balance of oorganisms in the mouth, leading to an overgrowth of Candida fungus evelopment of thrush.

    Whi otics?


    1. X

    2. H

    3. T

    4. C


    Ans


    Expl ect of

    prol

    micr and

    the d