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Periodontal Probe Selection: Which Probe is Right for Your Clinical Needs?

by Usman Younas

Introduction

The periodontal probe is the most fundamental diagnostic instrument in periodontal assessment. Accurate probing is the cornerstone of periodontal charting, disease staging, and treatment planning. With a wide variety of probe designs available, selecting the right probe for your clinical needs can significantly improve diagnostic accuracy and patient comfort. This guide helps dental hygienists, therapists, and periodontists choose the most appropriate periodontal probe for every clinical situation.

What Does a Periodontal Probe Measure?

A periodontal probe is a calibrated instrument used to measure:

  • Probing pocket depth (PPD) — the distance from the gingival margin to the base of the sulcus or pocket
  • Clinical attachment level (CAL) — the distance from the cemento-enamel junction (CEJ) to the base of the pocket
  • Bleeding on probing (BOP) — an indicator of gingival inflammation
  • Furcation involvement — using curved or Nabers probes
  • Recession — the distance from the CEJ to the gingival margin

Types of Periodontal Probes

Williams Probe

The Williams probe is one of the most widely used probes in general dental practice. It features markings at 1, 2, 3, 5, 7, 8, 9, and 10mm, with a colour-coded band between 3–5mm and 7–9mm on some versions. The Williams probe is ideal for detailed periodontal charting where millimetre-by-millimetre accuracy is required.

  • Best for: Comprehensive periodontal charting, research, specialist practice
  • Markings: 1, 2, 3, 5, 7, 8, 9, 10mm

Williams Colour Coded Probe

The colour coded Williams probe features the same millimetre markings as the standard Williams probe but with colour banding to aid rapid visual reading. This reduces the risk of misreading probe depths, particularly in busy clinical environments.

  • Best for: General practice, training environments, practitioners who prefer visual depth cues
  • Markings: 1, 2, 3, 5, 7, 8, 9, 10mm with colour bands

Williams Novatech Colour Probe

The Novatech colour probe combines the Williams marking system with enhanced colour coding and a precision-engineered tip. It is designed for practitioners who require both accuracy and ease of reading in a single instrument.

  • Best for: Practitioners seeking a premium colour-coded Williams-style probe

BPE Probe (CP-12 / UNC-15-BPE)

The Basic Periodontal Examination (BPE) probe is specifically designed for the BPE screening system recommended by the British Society of Periodontology (BSP). It features a 0.5mm ball tip and a colour-coded band between 3.5–5.5mm. The ball tip reduces the risk of false pocket depth readings and is gentler on the junctional epithelium.

The CP-12/UNC-15-BPE probe combines the BPE colour band with UNC-15 millimetre markings (every millimetre from 1–15mm), making it highly versatile for both BPE screening and detailed charting.

  • Best for: BPE screening in general practice, initial periodontal assessment, NHS dental settings
  • Markings: Colour band at 3.5–5.5mm; UNC-15 versions marked every 1mm to 15mm
  • Key feature: 0.5mm ball tip for reduced trauma and improved accuracy

Nabers Probe (Furcation Probe)

The Nabers probe is a curved, blunt-tipped probe specifically designed for assessing furcation involvement in multi-rooted teeth. Its curved shank allows it to follow the root anatomy into the furcation area, which a straight probe cannot access effectively.

The Nabers Colour Probe adds colour coding to aid depth reading during furcation assessment.

  • Best for: Furcation assessment in molars and premolars, periodontal staging
  • Key feature: Curved tip for furcation access

Probe Selection by Clinical Scenario

Clinical Scenario Recommended Probe
BPE screening (NHS/general practice) BPE Probe / CP-12 UNC-15 BPE
Full periodontal chart (6-point) Williams Probe or Williams Colour Coded
Furcation assessment Nabers Probe / Nabers Colour Probe
Specialist periodontal practice Williams Novatech Colour or UNC-15
Training and teaching Williams Colour Coded (easy to read)
Research / clinical trials Williams Probe (precise millimetre markings)

Probing Technique Tips

  • Use a pen grasp with a stable finger rest for controlled, consistent pressure
  • Apply 0.2–0.25N of force (approximately 20–25g) — excessive force gives false deep readings and causes patient discomfort
  • Walk the probe around the tooth in small increments, keeping it parallel to the long axis of the tooth
  • Angle the probe slightly to follow the contour of the root surface
  • Record the deepest reading in each sextant for BPE, or all six points per tooth for full charting
  • Always probe after scaling and root planing has been completed for accurate post-treatment assessment

Probe Maintenance and Sterilization

Periodontal probes should be sterilized between every patient. After use:

  • Remove gross debris with a damp gauze
  • Place in an ultrasonic cleaner with enzymatic solution
  • Rinse, dry, and package before autoclaving
  • Inspect the tip regularly — a bent or worn tip gives inaccurate readings and should be replaced
  • Check colour coding is still clearly visible — faded markings can lead to misreading

Shop Periodontal Probes at Virco

Virco stocks a comprehensive range of periodontal probes for every clinical need, from BPE screening to specialist periodontal charting and furcation assessment.

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