Periodontal Probe Types and Markings
Periodontal probes share a measuring function, but their markings and working-end shapes are not interchangeable. This reference explains the main dental probe types, how Williams, UNC-15, Marquis, WHO/CPI, and Nabers patterns differ, and what buyers should specify when comparing reusable periodontal probes.
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- A periodontal probe photograph emphasizes its measuring tip and graduated scale.
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- Periodontal probes WILLIAMS MARKINGS 1, 2, 3, 5, 7, 8, 9, 10 mm
What Is a Periodontal Probe Used For?
A periodontal probe is a slender, graduated instrument used to measure the depth of the gingival sulcus or periodontal pocket and to support consistent periodontal charting. The markings act as the clinician's scale, while the tip diameter, probe shape, and applied force can all affect the recorded measurement.
The right pattern depends on the task. Straight graduated probes support pocket-depth and attachment-level charting, screening probes use bands for rapid population or practice screening, and curved furcation probes examine the horizontal involvement between the roots of multirooted teeth.
Williams, UNC-15, and Marquis Probe Markings
The Williams probe is commonly marked at 1, 2, 3, 5, 7, 8, 9, and 10 mm, leaving 4 and 6 mm unmarked. Its abbreviated scale is easy to read for routine charting, but purchasers should confirm the exact graduation pattern because similarly named probes can vary by manufacturer.
The UNC-15 probe provides a 15 mm scale with millimeter graduations, making it useful when detailed full-mouth charting and deeper measurements are required. A Marquis probe uses color-coded bands at 3, 6, 9, and 12 mm, which can be faster to read but provides less visual detail than a fully graduated UNC-15 scale.
Marking visibility matters in daily use. Buyers should compare contrast, engraving depth, working-end straightness, tip consistency, and whether the markings remain legible after repeated cleaning and steam sterilization.
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- Williams, UNC-15, Marquis and WHO/CPI probe marking patterns shown for scale comparison.
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- Probe marking patterns WILLIAMS 4 and 6 mm are unmarked 1 2 3 5 7 8 9 10 UNC-15 Continuous 1 mm graduation 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 MARQUIS 3, 6, 9 and 12 mm bands 3 6 9 12 WHO / CPI 0.5 mm ball tip 3.5 5.5 8.5 11.5 Markings in mm; diagrams are not actual size.
WHO and CPI Periodontal Probes
The WHO Community Periodontal Index probe is designed for standardized screening. The WHO specification uses a 0.5 mm ball tip, a black band from 3.5 to 5.5 mm, and reference rings at 8.5 and 11.5 mm. Those features distinguish it from a conventional Williams or UNC-15 charting probe.
Because a screening probe and a detailed charting probe answer different questions, a practice or school should specify the intended examination protocol before ordering. The probe name alone is not enough; the required tip and band configuration should appear on the purchase specification.
Nabers Probes for Furcation Assessment
A Nabers probe has a curved working end designed to enter the furcation area of multirooted teeth. It is used horizontally rather than as a substitute for a straight pocket-depth probe. Some patterns include millimeter markings, while others use bands or an ungraduated working end.
When sourcing a Nabers probe, confirm the curve, graduation pattern, terminal-shank alignment, handle style, and whether a single-ended or double-ended design is required. A curved furcation pattern should be listed separately from straight periodontal probes in product data and procurement sheets.
How to Specify Periodontal Probes for an Order
Write the complete pattern into the order: probe type, marking scale, tip form, handle style, finish, quantity, and any kit or cassette requirement. For example, “Williams periodontal probe, 1-2-3-5-7-8-9-10 mm markings, satin stainless steel handle” is less ambiguous than “dental probe.”
Practices often standardize one detailed charting probe and add a WHO/CPI or Nabers pattern only where their screening and furcation protocols require it. Schools and distributors should request a sample before a bulk order so faculty or clinical buyers can verify marking accuracy, readability, balance, and finish.
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- A periodontal probe annotated to show the measuring end, graduations, shank and handle.
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- The probe, in detail 01 02 03 GRADUATIONS SHANK PROFILE HANDLE GRIP Named marking pattern Curve and reach Shape and texture
Periodontal probe marking and pattern comparison
Only markings confirmed elsewhere on this page are listed here. Confirm the exact graduation with the manufacturer before standardizing an order.
| Pattern | Marking scheme | Working-end shape | Primary use |
|---|---|---|---|
| Williams | 1, 2, 3, 5, 7, 8, 9, 10 mm (4 and 6 mm omitted) | Straight | Routine pocket-depth and attachment-level charting |
| UNC-15 | Continuous millimeter graduations to 15 mm | Straight | Detailed full-mouth charting and deeper pockets |
| Marquis | Color-coded bands at 3, 6, 9, 12 mm | Straight | Faster-read charting with less detail than UNC-15 |
| WHO / CPI | 0.5 mm ball tip; black band 3.5-5.5 mm; reference rings at 8.5 and 11.5 mm | Straight, ball-tipped | Standardized population or practice screening under the WHO CPI protocol |
| Nabers | Varies by product — graduated, banded, or ungraduated | Curved | Furcation assessment on multirooted teeth, used horizontally |
What Can Be Confirmed Before You Order
We hold ISO 9001:2015 quality management certification. Request the certificate and its covered organization, site, scope and validity details before ordering. This management-system certification is not a blanket product or destination-market approval.
Sialkot production workflow
Material selection, forming, heat treatment where required, grinding, finishing, inspection, marking, and export packing.
Material02Grade confirmed by SKU
Material and applicable steel grade are confirmed against the quoted pattern instead of applying one grade to every instrument family.
MOQ03Order-type minimums
Samples: 1-3 pieces per pattern; standard product orders: confirmed with your quote; mixed wholesale: 25 instruments (mixed patterns); OEM: 25 pieces per pattern.
Packaging04Protective and branded options
Individual pouches, procedure sets, cassettes, protective bulk cartons, product labels, and approved private-label packaging.
Export05Documented dispatch
Commercial invoice, packing list, protective outer packaging, and courier or freight tracking appropriate to the order.
Periodontal Probe Types and Markings FAQ
Does each visible band on a periodontal probe represent one millimeter?
Not always. Read the scale for the named model: a Williams probe is marked at 1, 2, 3, 5, 7, 8, 9 and 10 mm, while a Marquis-style probe is listed with a 3 mm scale. Colors and bands help you identify a probe but do not mean the same interval on every model, so keep a scale key with the product reference.
Are the missing 4 mm and 6 mm lines on a Williams probe necessarily a defect?
No. The Williams pattern deliberately leaves out the 4 and 6 mm marks, so judge the instrument against the documented graduation pattern instead of expecting every millimeter to be marked. If the scale you receive differs from the model you ordered, record the discrepancy for assessment.
Is a probe–explorer combination the same configuration as a double-ended measuring probe?
No. Double-ended describes the format, not which end pair you get: one listing may pair an explorer with a Williams measuring end, while another pairs two measuring scales such as UNC15 and CPITN. Record both working ends on the order.
Can a probe labeled WHO or CPI be assumed to have the same scale as a Williams probe?
No. Use the actual specification. A CPITN-style probe is marked at 3.5, 5.5, 8.5 and 11.5 mm on one end, while a Williams probe has its own abbreviated scale. State the tip and graduation layout you want, alongside the screening or charting protocol your clinical team uses.
Which details matter when replacing one probe from an examination set?
Keep the complete reference, the scale and the working-end arrangement on the replacement line so it can be compared with the existing set. Williams probes are listed both as single probes and in combination configurations, and each carries its own scale.
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