2.1 Current Format After the OPES Update

The Current Item Count To Use

The California Registered Dental Assistant (RDA) Combined Written and Law and Ethics Examination currently contains 100 scorable items and 25 pretest items, for 125 total items, delivered in a 3-hour appointment. Those are the numbers to anchor pacing drills, practice sets, and study logistics on. The exam is built by the Dental Board of California with the Office of Professional Examination Services (OPES) and delivered at PSI test centers.

This count needs emphasis because the exam's recent history can mislead. Until late 2025 the form carried 125 scorable items plus 25 pretest items (150 total). On the Board's recommendation, OPES reduced the scorable count to 100. Coverage of the October 2025 Board action confirmed the reduction from 125 to 100 scorable items, effective November 1, 2025, while keeping the 25 pretest items and the 3-hour window. Older candidate information bulletins and review courses that still quote 125 scored questions are describing the pre-November-2025 form.

What Pretest Items Mean

Pretest items (experimental, unscored items) let the program gather performance data on new questions before they count. They are distributed throughout the form and not flagged, so you cannot tell a pretest item from a scorable one. The only rational strategy is to answer every item with full effort. A strange-looking item may be scorable; a routine one may be pretest. Trying to identify and skip experimental items wastes energy and risks dropping real points.

Because the items you see (125) exceed the items that are scored (100), stamina must cover the full 125. Do not slow down on an item because you suspect it is experimental, and do not coast through the final screens assuming the remaining items "do not matter." Treat the form as 125 questions that all deserve a careful read.

Why The OPES Update Matters

OPES is the examination-services arm within California's Department of Consumer Affairs that builds and maintains many state licensing exams. For the RDA program, the OPES update did two linked things: it cut the scorable count from 125 to 100, and it modernized the passing standard (covered in section 2.3). The stated goal was to lower unnecessary barriers to licensure while preserving the exam's reliability and defensibility. Candidates do not need to become psychometricians, but they do need to quote the current facts: 100 scored, 25 pretest, 3 hours.

A candidate working from old notes might overbuild a schedule around 125 scored items, or assume the time limit shrank when the item count did. Neither is true: the scored count is 100, the pretest count is 25, and the time limit is still 3 hours.

Current-Format Checklist

1. Write "100 scored + 25 pretest = 125 total, 3 hours" at the top of your facts page.
2. Build full-length stamina around 125 total items, not 100.
3. Use 3 hours as the timing window for every full simulation.
4. Answer every item carefully because pretest items are unlabeled.
5. Discard any source that still calls the exam "125 scored questions."
6. Do not translate the format into an unsupported "percent needed to pass."

Study Consequences

The shorter scored count makes the plan more precise, not more relaxed. The 2023 outline still has four domains, and Dental Procedures (50%) remains by far the largest. Infection Control and Health and Safety (25%) is the clear second. Assessment and Diagnostic Records (15%) and Laws and Regulations (10%) round out the form. Because the exam is combined, a clinical scenario can hinge on a legal, supervision, or safety judgment. The logistics tell you how long the exam lasts and how many items you will see; the outline tells you which duties those items measure.

Build mixed practice sets that fold consent, scope, records, and infection control into clinical scenarios so you train the combined format, not isolated trivia.

One Exam, Two Joined Parts

The word "Combined" in the title is meaningful. Earlier in the program's history, the general written content and the law and ethics content were sometimes treated as separable. The current single appointment merges them into one 100-item scored form, so law-and-ethics questions are not quarantined in a labeled block at the end — they are interspersed with clinical content. A candidate who plans to "answer the clinical questions first and circle back to the law questions" cannot reliably do so, because the form does not segregate them.

Be ready to switch between a restorative-support item and a consent or mandated-reporting item on adjacent screens.

This combined design is also why the smaller domains punch above their weight: Laws and Regulations is only 10% of the form, yet it can decide a clinical item whenever a choice has the assistant overstepping scope.

A Note On Eligibility Context

This chapter assumes you have already established eligibility (covered in Chapter 1) through a Board-approved RDA program or the work-experience-plus-required-courses pathway, including mandated courses such as the eight-hour infection control course, the California Dental Practice Act course, and a Board-approved radiation safety course where required. Those prerequisites shape what the written exam can fairly test: it measures the duties an eligible candidate has been trained to perform, which is why the outline maps so closely to real chairside tasks rather than abstract theory.