The OPTISMILE Podcast 132 - Laser Dentistry 2.0, Can a Laser Replace the Drill?
Welcome back to Save Your Money, Save Your Teeth. In the previous episode, Eon Engelbrecht and Dr Clifford Yudelman looked at bioactive fillings, the smart materials that help a tooth protect itself. This episode turns to the tool that does the cutting, and asks whether a laser can really replace the dental drill.They cover how hard tissue erbium lasers remove enamel and decay, why most practices that advertise laser dentistry only have soft tissue lasers, whether lasers really do away with the drill sound and the injection, how precise lasers are, and whether they can overheat a tooth. They also discuss what lasers cannot do, including removing old amalgam fillings, how well fillings bond to laser-prepared teeth, where lasers truly shine around gums, veneers and implants, why not every dentist owns one and whether laser fillings cost more, and the three questions patients should ask before choosing a laser dentist.10 Questions and Summary Answers[3:12] We know lasers can treat gums, but can they really cut tooth enamel without a drill? Dr Yudelman explains that hard tissue lasers, mainly the erbium family, fire short pulses of light that are absorbed by the water in the tooth. The water turns to steam and blows away tiny particles of tooth, like microscopic popcorn, with no spinning burr, no grinding pressure and very little vibration. Lasers are slower than the drill, but for a small cavity in a nervous patient, slower and calmer can be the right choice. They can cut enamel, and they are even better at removing decay.[4:45] If a practice advertises laser dentistry, does it mean they can do fillings with it as well? Usually not. Most dental lasers in practice are diode soft tissue lasers, which Dr Yudelman has used since 2004 and believes every good modern practice should have, but they cannot cut teeth. Erbium lasers that cut enamel and dentine are far more expensive; a Fotona he saw at the South African Dental Association conference costs around 1.8 million rand, and BIOLASE is the more widely used brand. He shares a story from Perth of a laser practice whose laser sat in the corner unused while its name kept the phone ringing.[8:00] Does a laser get rid of that high-pitched drill sound, and is it true that you sometimes don't need an injection? Instead of the drill's whine, a hard tissue laser makes a soft popping sound, which matters to people who have avoided the dentist because of the noise. A Cochrane review found that patients treated with lasers reported less pain and needed fewer injections, with decay removed just as well, but the evidence came from small, low-quality trials. Deeper decay still needs an injection, and anyone promising painless dentistry is selling. Dr Yudelman adds that if you hate the drill sound, you can simply ask whether the dentist uses quiet electric handpieces rather than air turbines.[9:42] Is a laser more precise than a drill? Does it actually save more healthy tooth? It can, because decayed tooth holds more water than healthy tooth, so the laser removes decay efficiently in small, careful steps. But it is not a magic decay detector. Dr Yudelman, who trained on an erbium laser in 2004, says he would still use a decay-detecting solution and a gentle spoon excavator to check whether the tooth is hard or soft. Precision dentistry is about knowing when to stop, whether you use a laser or a drill.[11:07] Does the laser actually heat up the tooth, and can that damage the nerve? Used properly, with water spray and very short pulses, the temperature stays in a safe range. Used badly, a laser can overheat a tooth, just like a drill run without enough water. Dr Yudelman recalls a dentist in London in the 1980s who prepared crowns with little or no water spray; her room smelled of burning hair, and most of the teeth she crowned lost their nerves. The lesson is the same for both tools: plenty of water.[12:39] What can't lasers do? Can they remove old metal fillings, for example? There is a lot lasers cannot do. They cannot remove old amalgam fillings, because that releases mercury vapour; safe removal needs a drill, high volume suction, an amalgam separator and lots of water. They are too slow for removing porcelain inlays or crowns or for shaping teeth, so patients expecting a drill-free visit may still end up with the drill. Where they excel is removing old ceramic veneers: Dr Yudelman recently referred a patient to a local BIOLASE dentist whose laser popped off six veneers, before she returned to OptiSmile for injection moulded composite bonding.[16:34] Do fillings stick as well to a tooth that's been prepared with a laser? Despite conference claims that lasers make etching unnecessary, Dr Yudelman says dentists must go back to the research. A laser leaves the tooth rough, but bonding results vary widely between lasers and adhesives, so a full bonding routine is still needed. At OptiSmile, an AquaCare unit, a small sandblaster shrouded in water, cleans and roughens enamel and dentine with very fine 29 micron aluminium oxide so the etch and bond work even better. The laser is just another tool.[18:33] Where would you say lasers really shine, around gums and implants? Lasers shine with gums and soft tissue, such as trimming excess gum back to the enamel to correct a gummy smile, which OptiSmile does with its diode laser. Erbium lasers like BIOLASE and Fotona can do more, including some crown lengthening procedures, tongue ties and lip ties, and cleaning inflamed tissue around implants with less bleeding, although OptiSmile's EMS machine with its special implant powder does a similar job. Lasers cannot drill bone for implants; that still needs guided surgery and a slow, water-cooled drill. Where a laser is clearly the best option, OptiSmile refers patients to a colleague who has one.[22:28] So why doesn't every dentist use one, and does a laser filling actually cost more? Hard tissue lasers cost millions of rand and need serious training; in South Africa, BIOLASE training is close to a year-long programme. They are slower for many procedures, which does not suit practices built on speed and volume. Fees are sometimes the same, but often extra codes are added because someone has to pay for the laser. Dr Yudelman has practised for 43 years without a hard tissue laser, though he would welcome one for anything that helps avoid crowns or root canals.[23:52] Is it the death of the dental drill, and what should patients ask? No, and it should not be; the drill is still an excellent tool, and lasers add choice without replacing judgement. Patients should ask what type of laser the dentist has, whether it suits their particular tooth, and, if they have a silver filling, whether the laser can actually remove it. Be wary of social media claims that you will not need an injection. The future is not drill-free but the right tool for the right tooth at the right time, and Dr Yudelman believes the next leap will be robotic drills, not robotic lasers.OutroLasers are a valuable addition to dentistry, especially for gums, soft tissue and removing old ceramic veneers, but they do not replace the drill or the dentist's judgement. Before paying more for laser dentistry, patients should find out exactly what kind of laser a practice has and what it can and cannot do for their tooth.Closing the episode, Dr Yudelman reflected on more than two and a half years and 132 episodes with Eon and E-Radio, and said he is grateful that listeners have managed to save money, and in some cases save their teeth.Further ResourcesBioactive Fillings, Can a Filling Help Your Tooth Heal? (Episode 131): https://optismile.co.za/blog/bioactive-fillings-can-a-filling-help-your-tooth-heal/Are Silver Amalgam Fillings Dangerous (Episode 123, safe amalgam removal): https://optismile.co.za/blog/are-silver-amalgam-fillings-dangerous/Crown Lengthening for a Gummy Smile (Episode 98): https://optismile.co.za/blog/episode-98-crown-lengthening-fixing-the-gummy-smile/Tongue Ties in Adults, Speech, Gum Health and Sleep (Episode 101): https://optismile.co.za/blog/tongue-ties-in-adults-speech-gum-health-sleep/Dental Injections Explained (Episode 102): https://optismile.co.za/blog/dental-injections-explained/Robots and AI in Dentistry (Episode 128): https://optismile.co.za/blog/robots-and-ai-in-dentistry/The Advantages of Injection Moulded Composite Veneers (Episode 22): https://optismile.co.za/blog/the-advantages-of-injection-moulded-composite-veneers/An In-Depth Look at Dental Veneers (Episode 20): https://optismile.co.za/blog/an-in-depth-look-at-dental-veneers/Behind the Scenes, Advanced Technology and Personalised Dentistry (Episode 50): https://optismile.co.za/blog/behind-the-scenes-advanced-technology-and-personalised-dentistry-in-south-africa/Injection Moulding Technique for Veneers and Bonding: https://optismile.co.za/dental-solutions/injection-moulding-technique/Dental Veneers in Cape Town: https://optismile.co.za/dental-solutions/dental-veneers/Teeth Cleaning in Cape Town: https://optismile.co.za/dental-solutions/teeth-cleaning/Dental Implants in Cape Town: https://optismile.co.za/dental-solutions/dental-implants/Cochrane Review, Lasers for Caries Removal in Deciduous and Permanent Teeth: https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD010229.pub2/fullFotona Dental Lasers: https://www.fotona.com/en/BIOLASE Dental Lasers: https://www.biolase.com/AquaCare by Velopex: https://velopex.com/aquacare/EMS Dental: https://www.ems-dental.com/South African Dental Association: https://www.sada.co.za/OptiSmile Podcast Series: https://optismile.co.za/podcasts/OptiSmile YouTube Channel: https://www.youtube.com/@OptismileZa-dentist-cape-townContact OptiSmile: https://optismile.co.za/contact-dentist-cape-town/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.