The OPTISMILE Podcast 119 - Floss, Waterpiks and Tiny Brushes: What Actually Works

IntroductionAlmost none of the expensive trouble in a mouth begins on the surfaces you can see in the mirror. It begins in the gaps between the teeth, where decay, gum disease and bone loss get a quiet head start and where a toothbrush simply cannot reach.In this episode Dr Clifford Yudelman settles a long-running argument: is string floss finished, are the little brushes genuinely better, and where does a Waterpik actually fit in? Along the way he explains why gums bleed and why that is a reason to keep going rather than stop, how to clean under a bridge without wrecking it, whether floss picks are cheating, what the loop method is and why most people get flossing wrong, and why food keeps getting stuck in the same spot every single time.The underlying theme is the one this podcast keeps returning to: the cleaning you do between your teeth is unglamorous, takes under a minute, and prevents the most expensive problems in dentistry. Get the tool right for your mouth and it can save you thousands of rand over a lifetime.Questions and AnswersQuestion 1   (1:49)Is string floss dead? Do interdental brushes actually work better?String floss is not dead, but it has been oversold, because the goal was never flossing — the goal is removing plaque between the teeth, and floss is only one tool for that. In many adult mouths, particularly where there is some recession or early gum disease, a correctly sized little brush sweeps the plaque away in a way floss often does not. Patients who floss every night and still get cavities are usually sliding past the plaque rather than removing it; switch them to properly fitted brushes and the bleeding stops within days and the x-rays stop showing progression.Question 2   (5:42)What exactly is a Waterpik, and can it replace manual flossing entirely?A Waterpik is a brand of oral irrigator — a pulsating stream of water designed to disrupt bacteria below the gum line and flush out food. It genuinely reduces inflammation and calms bleeding gums, and it is valuable for people with braces, implants or bridges, and for anyone whose hands do not allow fine motor control. What it does not do reliably is scrape sticky biofilm off the tooth surface, so it is an addition to interdental cleaning, not a replacement for it.Question 3   (7:58)Why do your gums bleed when you floss, and does it mean you should stop?Bleeding does not mean your gums are weak, it means they are inflamed, and that inflammation is almost always plaque sitting at the gum line. The common mistake is to floss once, see blood, panic and stop — which leaves the plaque exactly where it was and makes things worse months later. Clean gently and consistently and the bleeding usually reduces within a few days and clears within a week or two; start a week or two before your dental visit and you arrive having already done half the job.Question 4   (10:33)For people with tight teeth, is waxed floss better than tape?It is less about which is better and more about which is usable: waxed floss slides through tight contacts and shreds less, while tape is wider and suits broader contacts. The studies show little real difference — what matters is that the floss is guided gently below the gum line and wrapped around the tooth surface. If floss constantly shreds, that is not a floss problem; it is usually reporting a rough filling, tartar or an early cavity.Question 5   (13:47)How do you clean under a bridge without wrecking it?Bridges fail from hygiene problems far more often than structural ones, and they average about seven years, which is a large part of why an implant is often the better long-term choice than filing down two healthy teeth. A Maryland bridge is easy, because the floss goes in from the side without the wing. A conventional bridge needs superfloss or a floss threader under the pontic every single day, plus a little brush at the gum line where the pontic meets your own tooth — that is where the decay that costs people their bridges starts.Question 6   (16:08)Are floss picks as good as regular floss, or are they cheating?They are a compromise. The angle is wrong, the floss cannot wrap around the tooth, and we regularly see people cutting into their gums with them. Better than nothing for getting a bit of biltong out, but nobody should buy them believing the job is done - learn to use floss properly and have your dentist or hygienist watch you do it.Question 7   (17:22)What is the loop method, and why do most people floss wrong?Tying the floss into a circle gives you control and comfort without cutting off the circulation to your fingers, and it is an excellent way for beginners to learn. The cleaning only happens when the floss is curved into a C shape against the tooth and moved gently below the gum line — and every gap has two tooth surfaces that both need it. Snapping the floss in and flicking it out will dislodge food, but it is not cleaning.Question 8   (19:31)Can using a Waterpik on too high a setting damage your gums?Yes. Professionally dispensed units are designed not to cause damage and come with instructions on how to use them, but supermarket and online devices tempt people into assuming higher pressure means a better clean. Blasting the gum line at excessive pressure can traumatise the tissue and drive bacteria under the gum, and it is particularly risky around implants. The principle is the same as brushing: gentle and correctly angled beats forceful.Question 9   (20:46)Why does food get stuck in the same spot every time, and can flossing fix it?Recurrent food trapping is rarely random — it usually means something has changed: a chip, a shifted tooth, a filling that was not contoured properly, or a new crown with a pointed cusp forcing food between two teeth that were previously fine. Clear it promptly and gently, because a very new trap can still resolve on its own if you stop it widening; forcing a toothpick in will only open the gap further. Not every food trap needs drilling — smoothing off a plunger cusp often solves it without redoing a filling or placing a crown.Question 10   (~23:00)If I only have time for one — brushing or flossing — which saves the most money long term?Do both, but understand the arithmetic: brushing the surfaces and along the gum line covers roughly 60% of the tooth, and the remaining 40% is between the teeth, which is precisely where most decay, most gum disease and most bone loss begin. Brushing keeps you functional; cleaning between your teeth keeps your teeth intact. Over a lifetime it is that 40% that prevents the most expensive problems.Closing ThoughtsThe argument about floss versus brushes versus water flossers turns out to be the wrong argument. The question is not which tool has won, but whether the plaque between your teeth is actually coming off - and for a great many adult mouths, a correctly sized interdental brush does that better than floss ever did. The brand matters far less than the fit, and the fit is something your dentist or hygienist should size for you.Bleeding gums remain the cheapest early warning you will ever be given. Ignored, they progress to periodontal treatment, bone loss and sometimes surgery. Addressed with a week or two of gentle, consistent cleaning, they very often simply resolve.Dr Yudelman closes with a story from rural Tanzania, where a host broke slivers of wood from a particular tree and handed them round after a meal - a communal tooth-cleaning ritual that, as he points out, was doing something close to the job of a modern interdental brush long before anyone marketed one. The tools have changed considerably. The principle has not changed at all.Further ResourcesStop Bleeding Gumshttps://optismile.co.za/bleeding-gums/Gum Disease — Early Signs, Professional Care and Recoveryhttps://optismile.co.za/blog/gum-disease-early-signs-professional-care-and-recovery/Teeth Cleaning in Cape Town (Scaling & Polishing)https://optismile.co.za/dental-solutions/teeth-cleaning/Professional Dental Cleaning Explainedhttps://optismile.co.za/blog/professional-dental-cleaning-explained/Tips for Cleaning Your Teeth When Wearing Braces (superfloss and Waterpik guidance)https://optismile.co.za/blog/tips-cleaning-teeth-wearing-braces/Missing Teeth — Bridges, Implants and Pontics Explainedhttps://optismile.co.za/dental-problems/missing-teeth-2/Dental Implants in Cape Townhttps://optismile.co.za/dental-solutions/dental-implants/The Hidden Dangers of Ignoring Tooth Decayhttps://optismile.co.za/blog/hidden-dangers-of-ignoring-tooth-decay/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.