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Free Practice Questions for EUC-ODON

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Key Facts: EUC-ODON Exam

135 + 40

Scored multiple-choice items plus unscored pilot items on the official exam

Ceneval, EUC-ODON exam page

2 x 3 hours

Two 3-hour sessions with a 1-hour break

Ceneval, EUC-ODON exam page

4

Official areas: Diagnóstico; Pronóstico y plan de tratamiento; Tratamiento integral; Prevención y promoción de la salud

Ceneval, EUC-ODON exam page

5 years

Validity of ADM professional certification

ADM, Reglamento del Consejo de Certificación, Art. 24

MXN 4,000

ADM member certification fee (MXN 5,000 for non-members)

Consejo de Certificación ADM, certification page

EUC-ODON is the Ceneval exam used by ADM and CNCD to certify general dentists in Mexico: 175 Spanish multiple-choice items (135 scored) in two 3-hour sessions, across diagnosis, prognosis and treatment planning, comprehensive treatment, and prevention.

Sample EUC-ODON Practice Questions

Try these sample questions to review concepts for the EUC-ODON exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Under NOM-013-SSA2-2015, which statement about the dental informed-consent letter (carta de consentimiento informado) in the clinical record is correct?
A.It must be written in plain, non-technical language, record the treatment alternatives explained, and be redone if the treatment plan changes
B.Once the patient signs it, consent is irrevocable, even before the procedure has started
C.It obliges the dentist to perform the procedure the patient chose even when the risk outweighs the benefit
D.One signed letter at the first visit covers every later change to the treatment plan
Explanation: Section 9.6 of NOM-013-SSA2-2015 requires the consent letter to use simple language without technical terms, state that different treatment alternatives were explained, and be prepared again whenever the treatment plan is modified. It must also describe the intervention, its main risks and expected benefits, and carry the signatures of the dentist, the patient, and a witness.
2During a routine extraoral examination, a dentist palpates an enlarged, non-tender, fixed, and indurated lymph node in the left submandibular region. What is the most critical clinical implication of these physical findings?
A.High suspicion of regional metastatic malignancy warranting urgent investigation
B.Classic presentation of acute bacterial lymphadenitis requiring oral penicillins
C.Benign reactive lymphadenopathy from recent localized aphthous stomatitis
D.Normal physiological variant of superficial lymphatic drainage in young adults
Explanation: Lymph nodes that are painless, hard (indurated), fixed to underlying tissue, and progressively enlarging carry a high index of suspicion for malignant metastasis and mandate immediate diagnostic imaging and biopsy evaluation.
3A 34-year-old patient reports jaw joint sounds during opening. Clinical palpation reveals a distinct reciprocal click at mid-opening and late closing, without pain or limitation of movement. What temporomandibular joint condition is indicated?
A.Anterior disc displacement with reduction
B.Anterior disc displacement without reduction
C.Advanced degenerative joint disease with osteophytosis
D.Rheumatoid arthritis of the condylar head
Explanation: A reciprocal click (clicking on opening as the condyle moves onto the posterior band of the disc, and clicking just before closing as the disc slips off anteriorly) is the pathognomonic clinical sign of anterior disc displacement with reduction.
4A 58-year-old male smoker presents with a solitary, sharply demarcated, non-scrapable white plaque on the lateral border of the tongue that has been present for two months. What is the provisional clinical diagnosis?
A.Leukoplakia
B.Pseudomembranous candidiasis
C.Morsicatio buccarum
D.White sponge nevus
Explanation: Leukoplakia is defined by the WHO as a predominantly white lesion of the oral mucosa that cannot be characterized clinically or pathologically as any other identifiable disease. Lesions on the ventrolateral tongue carry the highest risk of malignant transformation.
5During soft tissue examination of the floor of the mouth in a 62-year-old patient, a fiery red, velvety, asymptomatic macule with well-defined borders is discovered. Why does this lesion require immediate biopsy?
A.Most erythroplakias already show severe dysplasia, carcinoma in situ, or invasive carcinoma at biopsy
B.It is most likely erythematous candidiasis, and biopsy is needed to culture the fungus
C.It is most likely a benign vascular malformation, and biopsy is needed to rule out a hemangioma
D.Red lesions carry lower malignant risk than white lesions, so biopsy is only a medicolegal precaution
Explanation: Erythroplakia has the highest malignant transformation potential among oral potentially malignant disorders. In classic series, most biopsied erythroplakias (around 90%) showed severe epithelial dysplasia, carcinoma in situ, or invasive squamous cell carcinoma, so a persistent red velvety patch on a high-risk site such as the floor of the mouth needs prompt biopsy.
6A 45-year-old female presents with bilateral, asymptomatic, lace-like interlacing white lines (Wickham striae) on the posterior buccal mucosa. What is the most probable diagnosis?
A.Reticular oral lichen planus
B.Pemphigus vulgaris
C.Secondary syphilis mucous patches
D.Discoid lupus erythematosus
Explanation: Reticular oral lichen planus is a chronic, T-cell-mediated autoimmune mucocutaneous disorder typically presenting as bilateral, symmetric, asymptomatic lace-like white keratotic lines (Wickham striae) on the buccal mucosa.
7How does recurrent aphthous stomatitis differ clinically from intraoral recurrent herpes simplex virus (HSV-1) infection?
A.Aphthae occur on non-keratinized movable mucosa; recurrent HSV occurs on keratinized mucosa bound to periosteum
B.Aphthae always start as visible clusters of vesicles; recurrent HSV begins as solitary deep ulcers
C.Aphthae are contagious viral lesions; recurrent HSV is an inherited autoimmune disorder
D.Aphthae occur exclusively on the hard palate; recurrent HSV occurs strictly on the buccal vestibule
Explanation: Recurrent aphthous ulcers appear almost exclusively on non-keratinized, movable mucosa (buccal mucosa, labial mucosa, floor of mouth, ventral tongue), whereas recurrent intraoral herpes occurs on keratinized mucosa firmly attached to periosteum (hard palate, attached gingiva).
8When performing periodontal probing, how is clinical attachment loss (CAL) calculated when the gingival margin is located 2 mm apical to the cementoenamel junction (CEJ) and the probing depth is 4 mm?
A.6 mm
B.2 mm
C.4 mm
D.8 mm
Explanation: Clinical attachment loss is the distance from the CEJ to the base of the periodontal pocket. When gingival recession is present, CAL equals probing depth plus recession: 4 mm + 2 mm = 6 mm.
9What is the recommended standardized probing force when performing a full-mouth periodontal examination with a manual periodontal probe?
A.0.20 to 0.25 N (approximately 20 to 25 grams of pressure)
B.0.75 to 1.0 N (approximately 75 to 100 grams of pressure)
C.1.5 to 2.0 N (sufficient to blanch the surrounding attached gingiva completely)
D.0.05 N (feather-light touch without entering the gingival sulcus)
Explanation: Standardized periodontal probing guidelines specify a force of 0.20 to 0.25 N (around 20 to 25 g). This allows the probe tip to reach the apical end of the junctional epithelium without penetrating healthy connective tissue fibers.
10What is the primary diagnostic significance of bleeding on probing (BOP) observed 30 seconds after gentle periodontal probing?
A.It serves as a reliable objective indicator of active inflammatory changes in the pocket wall
B.It definitively confirms that active osteoclastic bone destruction is taking place that day
C.It indicates that the tooth has irreversible pulpitis requiring immediate root canal treatment
D.It indicates that the patient has an undetected systemic hemophilia A mutation
Explanation: Bleeding on probing reflects micro-ulceration of the sulcular epithelium accompanied by connective tissue hyperemia. While its positive predictive value for future attachment loss is modest (~30%), the absence of BOP is an exceptional predictor of periodontal stability (>98%).

About the EUC-ODON Exam

Independent EUC-ODON practice by OpenExamPrep. The official exam is a Spanish-language, multiple-choice test of 175 items (135 scored and 40 unscored pilot items) given in two 3-hour sessions. Ceneval applies it for the Asociación Dental Mexicana (ADM) and the Colegio Nacional de Cirujanos Dentistas (CNCD), covering four areas: Diagnóstico; Pronóstico y plan de tratamiento; Tratamiento integral; and Prevención y promoción de la salud. This bank is an English-language MCQ study adaptation, not an official translation or a simulation of the exam. Mexican norms such as NOM-013-SSA2-2015 and NOM-087-SEMARNAT-SSA1-2002 keep their official Spanish names.

Exam sponsor: ADM, CNCD, and Ceneval. The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Assessment

175 multiple-choice items (135 scored plus 40 unscored pilot items) given in two 3-hour sessions with a 1-hour break, on paper or online. Items are organized into four areas: Diagnóstico; Pronóstico y plan de tratamiento; Tratamiento integral; and Prevención y promoción de la salud. Ceneval does not publish the number of items per area.

Time Limit

Two 3-hour sessions (6 hours of testing) with a 1-hour break

Passing Score

Criterion-referenced; Ceneval reports Satisfactorio or Aún no satisfactorio with no published numeric cut score. The certifying body (ADM or CNCD) decides certification based on the exam result and its own requirements

Exam / Certification Fees

ADM: MXN 4,000 (members) or MXN 5,000 (non-members) for the certification process, including the Ceneval exam; CNCD sets its own fees

Exam sponsor website

Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.

Official sources

Our practice resources: topics covered

We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.

Official area (items per area not published)

Diagnóstico

Medical and dental history, clinical examination, periodontal charting, caries detection, radiographic interpretation, pulp testing, oral pathology, and systemic risk screening

Official area (items per area not published)

Pronóstico y plan de tratamiento

Pulpal, periapical, and periodontal diagnosis and staging, prognosis, dental management of medically compromised patients, and treatment-phase sequencing

Official area (items per area not published)

Tratamiento integral

Adhesive and restorative dentistry, dental materials, endodontics, local anesthesia, exodontia and oral surgery, fixed and removable prosthodontics, and pediatric dentistry

Official area (items per area not published)

Prevención y promoción de la salud

Fluorides, sealants, oral hygiene and chemical plaque control, sterilization and biological monitoring under NOM-013-SSA2-2015, and RPBI waste segregation under NOM-087

Preparing for the EUC-ODON Exam

What You Need to Know

  • Passing score: Criterion-referenced; Ceneval reports Satisfactorio or Aún no satisfactorio with no published numeric cut score. The certifying body (ADM or CNCD) decides certification based on the exam result and its own requirements
  • Assessment: 175 multiple-choice items (135 scored plus 40 unscored pilot items) given in two 3-hour sessions with a 1-hour break, on paper or online. Items are organized into four areas: Diagnóstico; Pronóstico y plan de tratamiento; Tratamiento integral; and Prevención y promoción de la salud. Ceneval does not publish the number of items per area.
  • Time limit: Two 3-hour sessions (6 hours of testing) with a 1-hour break
  • Exam / certification fees: ADM: MXN 4,000 (members) or MXN 5,000 (non-members) for the certification process, including the Ceneval exam; CNCD sets its own fees Official sources

Using Our Practice Resources

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EUC-ODON: Suggested Study Strategy

1Organize your review around the four official areas: Diagnóstico; Pronóstico y plan de tratamiento; Tratamiento integral; and Prevención y promoción de la salud.
2Learn the AAE pulpal and periapical diagnostic terms and the 2018 AAP/EFP periodontitis staging and grading criteria, and practice applying them to clinical cases.
3Practice local anesthetic dose calculations: a 1.8 mL cartridge of 2% lidocaine contains 36 mg, and a 1:100,000 epinephrine cartridge contains 0.018 mg.
4Know the NOM-013-SSA2-2015 requirements for the dental record and informed-consent letter, sterilization, and biological indicators (at least every 2 months, with a record of results).
5Review RPBI segregation under NOM-087: sharps in rigid red polypropylene containers, blood-soaked gauze in red bags, and pathological tissue in yellow packaging.

Frequently Asked Questions

What is the EUC-ODON?

The Examen Único para la Certificación Profesional en Odontología is developed and applied jointly by the Asociación Dental Mexicana (ADM), the Colegio Nacional de Cirujanos Dentistas (CNCD), and Ceneval, which acts as independent evaluator. It is one requirement of the voluntary professional certification that ADM and CNCD grant as bodies recognized by the Dirección General de Profesiones.

Who can take the EUC-ODON?

Dentists with a professional degree (título) and cédula profesional, and experience verifiable to ADM or CNCD, who voluntarily seek certification. ADM applicants submit an application file with their título, cédula, CURP, ID, curriculum vitae, tax registration, photographs, and payment receipt.

How is the exam structured and scored?

It has 175 multiple-choice items, of which 135 are scored and 40 are unscored pilot items, given in two 3-hour sessions with a 1-hour break, on paper or online. The areas are Diagnóstico; Pronóstico y plan de tratamiento; Tratamiento integral; and Prevención y promoción de la salud. Results are reported as Satisfactorio or Aún no satisfactorio.

How long is ADM certification valid and how is it renewed?

ADM certification lasts 5 years. Dentists recertify by passing the EUC-ODON again or, if they are ADM members who met ADM's continuing-education standard, by a curricular review worth at least 200 points, requested within the 30 days before the certificate expires.

Why is this practice bank in English and multiple-choice?

The official EUC-ODON is given in Spanish. This OpenExamPrep bank is an independent English-language MCQ study adaptation for reviewing the clinical concepts and calculations in the four official areas; it is not an official translation or a simulation of the exam. Mexican norms such as NOM-013-SSA2-2015 and NOM-087 keep their official Spanish titles.