California RDA Law & Ethics Exam Q&A – Latest Edition |
100% PASS Study Guide with Practice Questions, Correct Answers &
Detailed Explanations
Passing the California Registered Dental Assistant (RDA) Law and Ethics Exam is a crucial step toward
earning and maintaining your RDA license. This exam ensures that all dental assistants in California
demonstrate a solid understanding of professional ethics, dental law, and patient care responsibilities —
the foundation of safe and ethical dental practice.
California RDA Law & Ethics Exam Q&A Latest | 100% PASS
1. Which category of dental assistant may perform a facebow transfer
procedure?
Answer: Dental Assistant under direct supervision
Rationale:
A facebow transfer helps relate the maxillary arch to the temporomandibular joint for accurate
articulation. This is considered a technical and non-invasive procedure allowed for a Dental
Assistant (DA) under direct supervision of a licensed dentist, meaning the dentist must be
physically present to evaluate accuracy and ensure patient safety.
2. Which category of dental assistant may fabricate a direct provisional
restoration?
Answer: Registered Dental Assistant (RDA) under supervision defined by the dentist
Rationale:
An RDA is trained to fabricate provisional (temporary) restorations directly in the mouth
using materials like acrylic or composite. The supervising dentist determines the supervision
level, but typically this is direct supervision because it involves patient contact and intraoral
materials.
3. Which category of dental assistant may remove orthodontic bands and remove
excess cement from supragingival surfaces of teeth with a hand instrument?
Answer: Orthodontic Assistant (OA) under direct supervision
Rationale:
Orthodontic Assistants have specialized certification to perform specific orthodontic tasks. Band
,removal and cleaning cement from tooth surfaces are delegable duties but only under direct
supervision, ensuring the dentist verifies proper completion.
4. Adding medication to intravenous (IV) lines requires which type of license and
what supervision level?
Answer: Sedation Assistant under direct supervision
Rationale:
Intravenous line management is a sedation-related function, requiring a Dental Sedation
Assistant (DSA) permit. Because it involves potential systemic effects, it must be done under
direct supervision, ensuring the dentist is present during administration.
5. Placing gingival retraction cord requires which type of license?
Answer: Registered Dental Assistant in Extended Functions (RDAEF)
Rationale:
Placing gingival retraction cord is an expanded function that may affect gingival tissues and the
impression margin. This duty requires an RDAEF certification, as it goes beyond the basic or
standard RDA scope.
6. Taking impressions for a tooth-borne removable prosthesis is allowed by
which type of assistant?
Answer: Registered Dental Assistant in Extended Functions (RDAEF)
Rationale:
Impressions for tooth-borne removable prostheses (like partial dentures) require advanced
training and precision, which fall under the RDAEF category. Standard RDAs may only take
impressions for diagnostic or opposing models.
7. Radiographic procedures may be performed under which supervision level?
Answer: General supervision
Rationale:
Once properly trained and certified in radiography, a dental assistant may take radiographs
under general supervision, meaning the dentist does not need to be physically present, but must
have authorized the procedure.
, 8. Which term describes the supervision of dental procedures that are prescribed
by the dentist but do not require the dentist to be physically present in the dental
facility?
Answer: General supervision
Rationale:
General supervision means the dentist has authorized a procedure and remains responsible for it,
but the assistant may perform it while the dentist is offsite, as long as it’s within the assistant’s
legal duties.
9. Which term describes a person who may perform all procedures of a
registered dental assistant and may perform scaling and root planing under
general supervision of a licensed dentist?
Answer: Registered Dental Hygienist (RDH)
Rationale:
An RDH can perform both preventive and therapeutic services, including scaling and root
planing, under general supervision, in contrast to RDAs, who are limited to supportive duties.
10. Which term best describes a procedure limited to the removal of plaque and
stain from exposed tooth structures?
Answer: Coronal polishing
Rationale:
Coronal polishing involves removing plaque and extrinsic stains but does not include calculus
removal. It’s a cosmetic, non-therapeutic procedure that can be performed by an RDA with
additional certification.
11. Which term describes the supervision of dental procedures that are
prescribed by the dentist who must be present and check the completed
procedure before dismissing the patient?
Answer: Direct supervision
Rationale:
Direct supervision requires the dentist’s presence during the procedure and verification before
patient dismissal. This level ensures accountability and patient safety during invasive or complex
procedures.
100% PASS Study Guide with Practice Questions, Correct Answers &
Detailed Explanations
Passing the California Registered Dental Assistant (RDA) Law and Ethics Exam is a crucial step toward
earning and maintaining your RDA license. This exam ensures that all dental assistants in California
demonstrate a solid understanding of professional ethics, dental law, and patient care responsibilities —
the foundation of safe and ethical dental practice.
California RDA Law & Ethics Exam Q&A Latest | 100% PASS
1. Which category of dental assistant may perform a facebow transfer
procedure?
Answer: Dental Assistant under direct supervision
Rationale:
A facebow transfer helps relate the maxillary arch to the temporomandibular joint for accurate
articulation. This is considered a technical and non-invasive procedure allowed for a Dental
Assistant (DA) under direct supervision of a licensed dentist, meaning the dentist must be
physically present to evaluate accuracy and ensure patient safety.
2. Which category of dental assistant may fabricate a direct provisional
restoration?
Answer: Registered Dental Assistant (RDA) under supervision defined by the dentist
Rationale:
An RDA is trained to fabricate provisional (temporary) restorations directly in the mouth
using materials like acrylic or composite. The supervising dentist determines the supervision
level, but typically this is direct supervision because it involves patient contact and intraoral
materials.
3. Which category of dental assistant may remove orthodontic bands and remove
excess cement from supragingival surfaces of teeth with a hand instrument?
Answer: Orthodontic Assistant (OA) under direct supervision
Rationale:
Orthodontic Assistants have specialized certification to perform specific orthodontic tasks. Band
,removal and cleaning cement from tooth surfaces are delegable duties but only under direct
supervision, ensuring the dentist verifies proper completion.
4. Adding medication to intravenous (IV) lines requires which type of license and
what supervision level?
Answer: Sedation Assistant under direct supervision
Rationale:
Intravenous line management is a sedation-related function, requiring a Dental Sedation
Assistant (DSA) permit. Because it involves potential systemic effects, it must be done under
direct supervision, ensuring the dentist is present during administration.
5. Placing gingival retraction cord requires which type of license?
Answer: Registered Dental Assistant in Extended Functions (RDAEF)
Rationale:
Placing gingival retraction cord is an expanded function that may affect gingival tissues and the
impression margin. This duty requires an RDAEF certification, as it goes beyond the basic or
standard RDA scope.
6. Taking impressions for a tooth-borne removable prosthesis is allowed by
which type of assistant?
Answer: Registered Dental Assistant in Extended Functions (RDAEF)
Rationale:
Impressions for tooth-borne removable prostheses (like partial dentures) require advanced
training and precision, which fall under the RDAEF category. Standard RDAs may only take
impressions for diagnostic or opposing models.
7. Radiographic procedures may be performed under which supervision level?
Answer: General supervision
Rationale:
Once properly trained and certified in radiography, a dental assistant may take radiographs
under general supervision, meaning the dentist does not need to be physically present, but must
have authorized the procedure.
, 8. Which term describes the supervision of dental procedures that are prescribed
by the dentist but do not require the dentist to be physically present in the dental
facility?
Answer: General supervision
Rationale:
General supervision means the dentist has authorized a procedure and remains responsible for it,
but the assistant may perform it while the dentist is offsite, as long as it’s within the assistant’s
legal duties.
9. Which term describes a person who may perform all procedures of a
registered dental assistant and may perform scaling and root planing under
general supervision of a licensed dentist?
Answer: Registered Dental Hygienist (RDH)
Rationale:
An RDH can perform both preventive and therapeutic services, including scaling and root
planing, under general supervision, in contrast to RDAs, who are limited to supportive duties.
10. Which term best describes a procedure limited to the removal of plaque and
stain from exposed tooth structures?
Answer: Coronal polishing
Rationale:
Coronal polishing involves removing plaque and extrinsic stains but does not include calculus
removal. It’s a cosmetic, non-therapeutic procedure that can be performed by an RDA with
additional certification.
11. Which term describes the supervision of dental procedures that are
prescribed by the dentist who must be present and check the completed
procedure before dismissing the patient?
Answer: Direct supervision
Rationale:
Direct supervision requires the dentist’s presence during the procedure and verification before
patient dismissal. This level ensures accountability and patient safety during invasive or complex
procedures.
