Introduction Almost every patient has had the experience. You are lying back in the chair, and someone starts calling out numbers over your head. Three, two, three, five. It sounds like a code, or a bingo call, and very few people ever stop to explain what it means. Those numbers are a periodontal chart, and they are one of the most useful pieces of information in all of dentistry. They are also one of the least explained. In this episode Dr Clifford Yudelman decodes the numbers. What a periodontal probe actually measures, why one, two and three are healthy, why a four is a yellow light rather than a red one, and why a six is a different conversation altogether. He covers why bleeding is the earliest warning sign available, why smokers and vapers can show deceptively good numbers while bone quietly disappears underneath, and why a full periodontal examination includes far more than pocket depths. The closing argument is a financial one. A chart turns guesswork into a plan, and guesswork is what costs patients money. Questions and Answers QUESTION 1 | 1:19 When the hygienist calls out numbers like three, two, three, five, what exactly are they measuring? Depth, not damage. A blunt periodontal probe is slid gently into the space between the tooth and the gum, called the sulcus, and the number is how far it goes before it meets resistance. One, two or three millimetres means the gum is sealed tightly against the tooth, and with six readings per tooth there are around 180 readings in a full mouth. QUESTION 2 | 4:24 What is a periodontal pocket, and how does it form? Inflammation makes the gum swell and lose its grip, so it detaches from the tooth and leaves a deeper space where bacteria can live undisturbed and a toothbrush cannot reach. Nobody wakes up with a six millimetre pocket. It takes months or years of uninterrupted inflammation, which means there is a long window in which it is still reversible. QUESTION 3 | 6:14 Is a four a warning sign, and is a six a disaster? A four is a yellow light, not a red one. It is inflammation, and most fours come back down to threes with better interdental cleaning and a professional clean of the area that is bleeding. A six is a different conversation, because bone support may already be compromised, although a single isolated six often turns out to be a food trap or an overhanging filling rather than gum disease. QUESTION 4 | 9:17 Does the probing hurt, and if it does, what does that tell us? Healthy gums barely feel it, because only about 20 grams of force is used, roughly the pressure you would tolerate on your eyelid. If it hurts, that is inflammation, not a heavy hand. You cannot make a healthy gum bleed at that pressure, so pain and bleeding during probing are a map of where the cleaning at home is not working. QUESTION 5 | 12:29 What does it mean if there is bleeding during the probing? It means inflammation, and it is the earliest warning sign available, arriving long before pockets deepen and years before anything shows on an X-ray. There is no such thing as gums that simply bleed, and no such thing as sensitive gums. If your hands bled every time you washed them, you would not conclude that you had sensitive hands. QUESTION 6 | 13:56 Why do smokers often have good numbers but still have gum disease? Nicotine constricts the blood vessels in the gums, so there is less blood flow, less bleeding and less visible swelling. The gums look tidy while the warning system has been switched off and healing is impaired. This applies to vaping as much as to smoking, which is why probing and X-rays are essential rather than judging by appearance. QUESTION 7 | 16:11 How do these numbers relate to the bone loss we see on the X-rays? Probing reports on soft tissue and the X-ray reports on bone, so both are needed. Think of the tooth as a fence post. The probe tells you how loose the soil is at the top, and the X-ray tells you how much soil is left holding the post upright. Probing picks up trouble first, so waiting until the X-ray looks wrong is waiting too long. QUESTION 8 | 17:11 Can a deep pocket shrink back down to a healthy number without surgery? Yes, and it often does, particularly where bone has not yet been lost. Remove the irritation, whether that is tartar, an overhanging filling or a badly contoured crown, and the inflammation settles, the tissue tightens back against the tooth, and fours become threes. Once significant bone loss has occurred the position changes from curing to managing. QUESTION 9 | 19:09 If I have deep pockets, will I definitely lose my teeth? Not necessarily, and sometimes it is the reverse. A proper periodontal examination also records bleeding points, suppuration, furcation involvement between the roots, mobility grades and recession. A three millimetre pocket with six millimetres of recession leaves only two millimetres of bone holding the tooth, so pocket depth alone does not settle the question. QUESTION 10 | 22:00 Why is this gum map so important for saving money on future surgery? Because it turns guesswork into a plan, and guesswork is what costs money. A chart lets you compare today against a year ago, so treatment can be aimed at the one region that has changed rather than the whole mouth. Without it, dentistry becomes reactive, and reactive dentistry is nearly always more dentistry than the patient actually needed. Closing Thoughts The single most useful sentence in this episode is that your gum numbers are a map, not a verdict. A four is a yellow light. A six needs attention. Neither one is a sentence, and both are far more informative than most patients are ever told. Dr Yudelman closes with his father, who practised for 57 years, taught periodontics to postgraduates at the university for 27 years, and brought conservative scaling and root planing techniques back to South Africa after studying in the United States in 1968, all while working as a general dentist. The point being that probing is not specialist work. Every dentist and every hygienist should be doing it properly. So the next time somebody calls out numbers over your head, ask what they mean, and ask whether they are better or worse than last time. Further Resources Gum Disease: Early Signs, Professional Care and Recovery https://optismile.co.za/blog/gum-disease-early-signs-professional-care-and-recovery/ The companion episode on gingivitis and periodontitis, including the smoking and diabetes risk factors touched on here. Periodontist in Cape Town https://optismile.co.za/dental-problems/periodontist-cape-town Background on gum disease as a systemic health issue and when specialist periodontal referral is appropriate. Professional Dental Cleaning Explained https://optismile.co.za/blog/professional-dental-cleaning-explained/ What actually happens during a hygiene visit, including the disclosing dye and piezo ultrasonic scaling referred to in this episode. Teeth Cleaning in Cape Town: Scaling and Polishing https://optismile.co.za/dental-solutions/teeth-cleaning/ The service page for hygiene appointments, including the red, swollen or bleeding gums warning signs. Tips for Cleaning Your Teeth When Wearing Braces https://optismile.co.za/blog/tips-cleaning-teeth-wearing-braces/ Practical detail on water flossers and Curaprox interdental brushes for the areas a toothbrush cannot reach. The Importance of Oral Hygiene and Healthy Teeth https://optismile.co.za/blog/the-importance-of-oral-hygiene-and-healthy-teeth/ General preventive guidance, including tobacco and alcohol as gum disease risk factors. The Oral Microbiome and Your Health https://optismile.co.za/blog/the-oral-microbiome-your-health/ The bacterial side of the story, for listeners who want the biology behind why pockets harbour disease. Disclaimer: The content provided in this podcast, "Save Your Money Save Your Teeth" on Medical Mondays, is for informational and educational purposes only. It is not intended to serve as dental or medical advice. The insights and opinions expressed by Dr. Clifford Yudelman and any guests are designed to foster a better understanding of dental health, preventive measures, and general well-being, but should not be interpreted as professional dental or medical recommendations. Dr. Clifford Yudelman does not diagnose, treat, or offer prevention strategies for any health conditions directly through this podcast. This platform is not a substitute for the personalized care and advice provided by a licensed dental or healthcare professional. We strongly encourage our listeners to consult with their own dental care providers to address individual dental health needs and concerns. The information shared here aims to empower listeners with knowledge about dental health but must not be used as a basis for making health-related decisions without professional guidance. Your dental care provider is the best source of advice about your dental and overall health. Please always seek the advice of your dentist or other qualified health professionals regarding any questions or concerns about your dental health.
