BOCO common mistakes
BOCO · Understand the traps and how to avoid them.
When asked to identify the correct instrument for a given orthodontic or chairside task, the candidate names the instrument they habitually see in their own office rather than matching the instrument's design features (beak shape, serration, angulation) to the stated procedure.
Candidates memorize instrument names as a list tied to their personal clinical routine instead of learning the functional design of each instrument, so unfamiliar or newly worded scenarios break the recall link.
What to do instead
Build a study table with one row per instrument: name, functional design feature, and the exact task it performs. Practice reverse questions ('which instrument has a serrated beak used to remove bands?') so recognition runs from function to name, not name to routine.
The candidate sequences a multi-step orthodontic procedure (for example banding, bonding, or wire change) out of order, or omits a step such as etching, rinsing and drying, or checking occlusion after archwire placement.
Steps are learned as a memorized list without an underlying rationale, so under exam pressure or when a step is described in unfamiliar wording the candidate drops or reorders items.
What to do instead
Learn each procedure as a cause-and-effect chain: why each step exists and what fails if it is skipped. Rehearse by writing the sequence from memory, then explain aloud why each step must precede the next.
On infection control items, the candidate applies a single rule (for example 'spray everything with disinfectant') to all surfaces and items, instead of classifying each item as critical, semicritical, or noncritical and choosing sterilization, high-level disinfection, or low-level disinfection accordingly.
Spaulding classification is memorized as a definition but not practiced as a decision tool, so scenario questions about a specific item trigger a generic answer.
What to do instead
Practice sorting a list of 20 real items (extraction forceps, mouth mirror, countertop, radiographic sensor, orthodontic pliers, bib chain) into the three categories and naming the required reprocessing for each. Justify each placement by contact with tissue type.
The candidate confuses the order and timing of hand hygiene and personal protective equipment steps, such as donning gloves before the mask and eyewear, or removing gloves after touching the doffed mask.
The sequence is learned verbally and rarely practiced as a physical routine, so the order is fragile and easily reversed on written items.
What to do instead
Physically rehearse donning and doffing in the correct order several times, narrating each step. Anchor the logic: clean hands first, PPE outermost-last on and outermost-first off, hand hygiene again at the end.
When asked about a dental material's handling, the candidate gives setting time, mixing ratio, or storage conditions for the wrong class of material, or assumes all impression or bonding materials behave alike.
Materials are studied by brand name and clinical feel rather than by category (elastomeric, alginate, resin, glass ionomer), so properties blur together.
What to do instead
Group materials by category and learn the properties that distinguish each category: setting reaction, dimensional stability, need for moisture control, and shelf life. Compare two categories side by side in a table rather than memorizing isolated facts.
The candidate describes image mounting, sensor placement, or film orientation in a way that would flip the patient's left and right, or misstates which way the embossed dot or sensor orientation marker should face.
Orientation rules are memorized as a phrase without a mental picture of the resulting image, so left-right conventions are easy to invert.
What to do instead
Draw the geometry: patient position, receptor orientation, and the resulting image on the screen. State aloud the rule that the marker identifies the patient's anatomical side, and trace one full example from receptor placement to mounted image.
On records and treatment-planning items, the candidate selects a treatment or records set without first confirming the diagnostic information that decision depends on, such as missing radiographs, unrecorded medical history, or absent informed consent.
Candidates jump to the answer that sounds clinically active, skipping the prerequisite-gathering step that exam items are often testing.
What to do instead
For every scenario item, first list what information is already available and what is missing. Practice answering by asking 'what must be known before this decision is safe?' and choose the option that gathers or verifies that information when it is absent.
The candidate gives patient instructions using jargon or a single verbal explanation, and on communication items chooses an option that informs the patient without confirming understanding or offering a teach-back.
Clinical vocabulary is habitual, and candidates equate 'I explained it' with 'the patient understood it', which is exactly the distinction exam items probe.
What to do instead
Rewrite three common explanations (home care, appliance wear, post-operative expectations) in plain language and add a teach-back step. When answering communication items, prefer the option that checks comprehension and invites questions over one that simply delivers information.
On ethics and legal items, the candidate answers from personal opinion about what seems fair rather than applying the specific rule being tested, such as scope of practice, confidentiality limits, or the boundary between administrative and clinical duties.
These topics feel like common sense, so candidates do not study the governing principles and instead reason from intuition.
What to do instead
Learn the core principles as named rules (informed consent, confidentiality and its exceptions, scope of practice, mandatory reporting) and practice matching each scenario to the principle it invokes before choosing an answer.
The candidate mixes up anatomy or physiology facts that are close in name or location, such as the branches of a nerve, the direction of a muscle action, or which structure lies adjacent to a given tooth root, and answers from the sound of the term.
Structures are memorized as isolated labels without spatial relationships, so similarly named items interfere with each other in recall.
What to do instead
Study anatomy spatially: sketch the region, label structures in relation to one another, and describe each structure by its neighbors, its action, and its innervation or blood supply. Test yourself by explaining relationships, not just naming parts.