MODULE 12

Periodontal Probes and Basic Probing Technique

Topics Covered

  • The periodontal probe

  • Assessing tissue health

  • Reading and recording depth measurements

  • Probing technique

  • Informed consent for periodontal instrumentation

The Periodontal Probe

  • Design & Structure

    • The working end of the probe is blunt and rod-shaped.

    • The cross-section of the probe may be circular or rectangular.

    • Each probe is calibrated with millimeter markings to aid in measurements.

Functions of Probes

  • Probing findings are crucial for determining the health status of periodontal tissues.

  • Probes function like miniature rulers for making accurate intraoral measurements.

Other Uses of Probes

  • Measuring clinical parameters

    • Sulcus and pocket depths: Important for assessing periodontal health.

    • Clinical attachment levels: Evaluates attachment of the gingiva to the teeth.

    • Width of attached gingiva: Measures the amount of keratinized tissue attached to the tooth.

    • Assessment for bleeding: Helps in detecting inflammation or periodontal disease.

    • Measuring size of oral lesions: Useful in determining treatment options.

    • Monitoring treatment responses: Tracks changes in periodontal health over time.

Design Characteristics of the Periodontal Probe

  • Probes are marked in millimeter increments to allow for precise measurements.

  • They are designed to evaluate the health of periodontal tissues effectively.

Millimeter Markings

  • The working end of the probe is marked in various patterns of millimeter increments.

  • Color-coded probes are often utilized, with markings in bands for easy identification.

Caution with Probe Marking Patterns

  • Variability in design: It is essential not to assume that all periodontal probes have the same pattern of millimeter markings.

  • A millimeter ruler may be used to verify the specific marking pattern of any individual probe.

Examples of Probe Markings

  • Examples of various marking configurations on probes illustrate their diversity.

  • UNC 15 Probe: Features millimeter markings at every millimeter from 1 to 15 mm.

  • Other probes may have markings at specific intervals, such as 1, 2, 3, 5, 7, 8, 9, and 10 mm.

  • Color-coded probe example: Bands marked at 3, 6, 9, and 12 mm.

WHO—World Health Organization Probe

  • Characterized by a unique ball end and a thin round working end.

  • Recommended for routine periodontal screenings in general practice, with markings at 3.5, 5.5, 8.5, and 11.5 mm.

Goldman-Fox Probe

  • Features a flat working end with markings at 1–10 mm, skipping the 4 and 6 mm increments.

Novatech Probe

  • Notable for its shank design with an upward and right-angled bend, aiding access to distal surfaces of molars.

  • Markings include 3, 6, 9, and 12 mm.

Probing in Healthy Tissue

  • Probing depth in healthy conditions should range from 1 to 3 mm, without any bleeding.

Probing in Periodontal Pocket

  • Depths greater than 3 mm typically indicate the presence of a periodontal pocket.

Computer-Assisted Probes

  • Florida Probe: A notable example of a computer-assisted probe.

  • The probe is connected to a computer, which generates computerized dental charts that record various data:

    • Missing teeth

    • Recession

    • Pocket depth

    • Presence of bleeding

    • Additional relevant data

Recap of Probes and Their Importance

  • Probes serve an important role in assessing the health status of the periodontium.

  • Various calibrated probes are available in different millimeter configurations.

  • It is critical not to assume uniformity in probe markings; knowledge of the specific probe configuration is essential.

Assessing Tissue Health

  • Free Gingiva: The unattached portion of gingiva surrounding the tooth, resembling a turtleneck around the neck of the tooth.

  • Gingival Sulcus: A V-shaped space between the free gingiva and tooth surface.

    • The periodontal probe is inserted into this space for health assessment.

Healthy Sulcus Definition

  • Junctional Epithelium: The tissue that forms the base of the sulcus.

  • The sulcus is defined as the distance from the gingival margin to the coronal-most part of the junctional epithelium, typically measuring 1–3 mm.

  • Probing depth may vary, generally being slightly deeper on the mesial and distal surfaces than on the facial and lingual.

Attached Gingiva

  • The part of gingiva that is tightly connected to the cementum on the root and the connective tissue cover of the alveolar bone.

Periodontal Pocket

  • Defined as a bacterial infection affecting all parts of the periodontium, where sulcus depth measures greater than 3 mm.

  • The junctional epithelium forms the base of the pocket, attaching to the root surface apical to the cementoenamel junction (CEJ).

Types of Periodontal Pockets

  • Gingival Pocket: A deepening of the gingival sulcus due to detachment of the coronal portion of junctional epithelium and swelling of tissue.

  • Periodontal Pocket: Formed from apical migration of the junctional epithelium and destruction of periodontal fibers and bone.

Probing within a Periodontal Pocket

  • The probe is inserted into the periodontal pocket, with an example showing a depth of 6 mm.

Reading and Recording Depth Measurements

  • Depth measurements are determined by measuring the distance from the gingival margin to the base of the sulcus with a calibrated probe.

  • Probing Depth: Distance in millimeters from the gingival margin to the base of the sulcus or periodontal pocket, as measured with a probe.

Probing Depth in Healthy Tissue

  • In healthy tissue, the probing depth should be between 1 and 3 mm, with the probe tip touching the tooth near the CEJ.

Probing Depth in Periodontal Pocket

  • In periodontal pockets, the probe tip touches the root below the CEJ, and the probing depth is greater than 3 mm.

Recap of Probing Depth Definitions

  • Probing depth refers to the distance from the gingival margin to the base of the sulcus or periodontal pocket, quantified in millimeters.

  • Health: Probing depth ranges from 1 to 3 mm.

  • Disease: Probing depth exceeds 3 mm.

Probing Concepts Definition

  • Probing: The act of walking the tip of the probe along the base of the sulcus or pocket to assess the health status of periodontal tissues.

Adaptation of Probe Tip

  • The probe tip measures 1 to 2 mm on the side of the probe.

  • Correct Adaptation: The probe tip must remain in contact with the tooth surface throughout the walking stroke.

  • Incorrect Adaptation: The probe tip should not be held away from the tooth.

Parallelism Importance

  • Correct Parallelism: The working end of the probe must be positioned as parallel as possible to the root surface in both the mesiodistal and faciolingual dimensions.

  • Cited examples highlight correct versus incorrect probe angles in relation to the root’s long axis.

The Walking Stroke Method

  • Walking strokes are employed to cover the entire circumference of the sulcus.

  • The junctional epithelium may not have a uniform depth, thus requiring attention to detail while probing.

Walking Stroke Production Technique

  • The probe is inserted and lightly run along the tooth surface until it touches the soft tissue base of the sulcus or pocket.

  • The base feels soft and flexible against the probe tip.

  • Walking stroke characteristics: a series of short, bobbing strokes made within the sulcus or pocket while keeping the probe tip aligned and in contact with the root surface.

Steps to Create Walking Strokes

  • Move the probe tip up and down in short bobbing strokes while advancing forward in 1-mm increments.

  • Importantly, do not remove the probe from the sulcus after each stroke, as repeated removal can traumatize the tissue.

Stroke Pressure Application

  • The pressure exerted by the probe tip against the soft tissue base should be between 10 to 20 grams.

Calibration of Stroke Pressure

  • Standardize probing pressure through practicing on a scale that measures weight in grams to ensure consistency.

Comprehensive Coverage During Probing

  • It is essential to conduct walking strokes around the entire tooth, ensuring that the soft tissue base is fully explored.

  • Variations in depth are common and may require additional attention in specific areas.

Measuring Recordings

  • Depth measurements should be documented for six distinct sites or zones on each tooth.

  • The focus of documentation should be on the deepest measurement recorded from each zone, rounded up to the nearest full millimeter.

Limitations Affecting Measurement Accuracy

  • Various factors influencing accuracy include:

    • Position of the gingival margin

    • Presence of calculus deposits or overhanging restorations

    • Application of pressure

    • Misreading probe calibrations

Proximal Surface Measurements Technique

  • When teeth are adjacent, special techniques must be employed to probe the area beneath the contact point, which cannot be directly accessed.

Interproximal Readings Challenges

  • Accessing the base of the sulcus directly beneath contacts is often impossible due to interproximal positioning of teeth.

Two-Step Technique for Probing

  • This technique is used when assessing mesial and distal surfaces of adjacent teeth.

Step 1: Contact Area Assessment

  • Walk the probe between the teeth until it makes contact with the contact area.

Step 2: Tilting the Probe

  • Tilt the probe slightly to allow the tip to reach beneath the contact area. This position enables gentle downward pressure to touch the soft tissue base.

Assessing Proximal Surfaces from Facial and Lingual Aspects

  • Probing requires careful angles to ensure access to proximal surfaces, especially around molars where access may be limited.

Challenges in Probing Maxillary Molars

  • Difficulty in accessing distal surfaces of maxillary molars due to anatomical barriers from the mandible.

Solutions for Difficult Access

  • Instrument handle repositioning to the side of the patient’s face can aid in reaching and probing distal surfaces effectively.

Recap of Probing Techniques

  • A careful, precise technique is essential when evaluating sulcus or pocket depths.

  • Adherence to walking stroke methodology, correct adaptation, and maintaining parallelism significantly influences measuring accuracy.

  • Probing proximal depths may necessitate angling the probe correctly.

Probing Techniques for Posterior Teeth

  • It is crucial to utilize a step-by-step methodology in probing posterior teeth, following the guiding principles:

    • "Me, My patient, My light, Grasp, Finger rest, and Adaptation."

Zone 1 Probing on Posterior Teeth

  • Step 1: Insert at the distofacial line angle while keeping the side of the probe in contact with the tooth surface and gently sliding to touch the soft tissue base.

  • Step 2: Maintain contact with the tooth while gently pressing down to ensure the probe touches the soft tissue base, initiating a series of short, bobbing strokes towards the distal surface.

  • Step 3: Walk the probe onto the distal surface until it contacts the contact area.

  • Step 4: Tilt the probe to reach beneath the contact area and gently press down to make contact with the soft tissue base of the sulcus/pocket.

  • Step 5: Confirm technique accuracy by ensuring the probe tip is beneath the contact area, applying pressure to register a reading.

  • Prepare to access zone 2, which involves the facial surface from distofacial line angle to mesiofacial line angle.

Zone 2 Probing Technique

  • Step 7: Perform a series of tiny walking strokes across zone 2 on the facial surface.

Zone 3 Probing Technique

  • Step 8: Reinsert the probe at the mesiofacial line angle to prepare for assessing the mesial surface.

  • Step 9: Walk the probe onto the mesial surface until it touches the contact area.

  • Step 10: Take a measurement beneath the contact area by tilting the probe slightly to press against the soft tissue.

Recap of Posterior Probing Techniques

  • Reinforce the importance of instrumentation basics while probing: "Me, My patient, My light, Grasp, Finger rest, and Adaptation."

Probing Techniques on Anterior Teeth

  • Begin probing maxillary canines from the incisal view, starting at zone 1 from the distofacial line angle to the midline of the distal surface.

Steps for Anterior Teeth Probing

  • Step 1: Insert at the distofacial line angle.

  • Step 2: Walk toward the distal surface.

  • Step 3: Tilt the probe and take readings beneath the distal contact area, ensuring access during probing.

  • Step 4: Define zone 2 on the facial surface, covering from the distofacial line angle to the mesiofacial line angle.

  • Step 5: Walk across the facial surface with a careful and controlled approach.

  • Step 6: Assess zone 3, measuring from the mesiofacial line angle to the midline of the mesial surface.

  • Step 7: Walk the probe onto the mesial surface until contacting the contact area.

  • Step 8: Tilt the probe and take a reading beneath the mesial contact area, following the same probing principles.

Recap of Anterior Probing Techniques

  • Emphasize the importance of implementing the basic skills of instrumentation: "Me, My patient, My light, Grasp, Finger rest, and Adaptation."

Informed Consent for Periodontal Instrumentation

  • Patients have the right to receive comprehensive information for making informed choices regarding their care.

Informed Consent Process

  • Dental hygienists must provide detailed information about the recommended periodontal instrumentation plan, ensuring that patients can make informed decisions about accepting or rejecting treatment.

  • This includes discussing possible risks and unexpected outcomes.

Ethical Considerations in Informed Consent

  • Key aspects include:

    • The reasoning and importance behind the proposed treatment.

    • Expected successful outcomes and potential risks involved.

    • Alternative treatment options available.

    • Consequences of rejecting treatment.

    • The costs associated with the proposed treatments.

    • Assessing the patient’s capacity to consent (considering age, mental capacity, and language understanding).

Documenting Consent

  • Written consent must be documented with signed plans in the patient's chart, as verbal or implied consents are less legally sound. Don’t forget to sign the documentation.

Informed Refusal

  • Patients may refuse proposed treatments after obtaining all relevant information.

  • Specific treatments such as radiographs or fluoride treatments can be declined.

  • It is important to include a refusal form as part of the informed consent and treatment record.

Recap of Informed Consent Practices

  • After assessment, the hygiene practitioner must clearly explain findings and propose treatment recommendations using contemporary terminology, as the way clinicians present information can influence patient perceptions positively or negatively.

  • Dialogue between dental hygienists and patients is essential to initiate the informed consent process effectively.