Clear, honest answers to the questions patients ask most often — written by Dr. Jason Kung, Specialist Endodontist.
Headlines in July 2026 announced a liquid that stops cavities in seconds, no drill required. The study behind them — a Phase III U.S. trial of silver diamine fluoride in 830 young children — is real and important. Here is what SDF actually does, who it helps, and why it does not change what happens once decay reaches the nerve.
Read articleA properly fitted mouthguard is one of the simplest ways to protect your young athlete's teeth. Here's what every sports parent should know before the season starts.
Read articleIn April 2026 the California Dental Association re-shared the profession's antibiotic-prescribing guidelines alongside a national investigative series asking why inappropriate antibiotic prescribing is still common in dentistry. The encouraging headline: dental clindamycin prescriptions dropped 35% between 2020 and 2025 as dentists embrace stewardship. Here is what the ADA's evidence-based guideline actually says, why 'a course of antibiotics first' is usually the wrong plan for an infected tooth, and what resolves the infection instead.
Read articleA July 2026 Wall Street Journal report captured a shift underway in medicine: researchers are treating the mouth as a source of bodywide inflammation, linking diseased gums to heart disease, diabetes, Alzheimer's, and more. Most of that research is about gum disease — but the same principle applies to a chronic infection at the root of a tooth, which is exactly what a root canal eliminates. Here is an endodontist's read on what the science does and does not say, and why clearing a silent tooth infection is a whole-body health decision, not just a dental one.
Read articleHeadlines in July 2026 announced a gel that could "regrow tooth enamel" and end cavities. The underlying study, published in Nature Communications, is genuinely impressive: a protein matrix that draws calcium and phosphate from saliva and grows new enamel-like crystals aligned with the tooth's own structure. But there is a wide gap between a laboratory result and a treatment in your dentist's chair — and an even wider gap between repairing enamel and saving a tooth whose nerve is already infected. Here is an endodontist's honest read on what this technology does, who it could help, and why it does not change what to do when you already have deep pain.
Read articleMost soreness after a root canal fades in a few days — but which pain relievers actually work best? We walk through the peer-reviewed evidence on ibuprofen, the ibuprofen-plus-acetaminophen combination, corticosteroids, and laser therapy, including where the research is strong and where it's still thin.
Read articleA major new meta-analysis pooled 84 clinical studies covering nearly 12,000 treated teeth to ask which root canal filling technique or material works best. The surprising answer: the technique matters far less than the hands holding the instruments.
Read articleExternal cervical resorption is a sneaky condition in which the body's own cells slowly dissolve a tooth from the outside, often with no pain until it's advanced. The big question for any patient is: can my tooth be saved? A 2026 review in the International Endodontic Journal looked at how well doctors can actually predict the answer.
Read articleIf you've ever stared at a dental Explanation of Benefits and wondered what it actually says, you're not alone. Two proposed ADA national standards aim to make dental insurance paperwork readable and prior authorizations faster — here's what patients should know.
Read articleThe American Association of Endodontists closed out its 2025–2026 membership year with a recap video. Here's what that year looked like from our Sunnyvale practice — and why AAE membership matters for our patients.
Read articleNot every root canal is created equal. Some are quick and predictable; others are genuinely difficult, and attempting them without the right training or equipment can put the tooth at risk. A 2026 review in the International Endodontic Journal mapped the formal tools dentists use to grade case difficulty — here's what they reveal.
Read articleWhen a child or teenager loses the nerve in a permanent tooth that hasn't finished growing, regenerative endodontics can coax the root to keep developing. A key step is disinfecting the canal — but which medicine works best? A new 2026 meta-analysis in the International Endodontic Journal gives the clearest answer yet.
Read articleSometimes a root canal alone isn't enough to save a tooth. An apicoectomy is a minor surgical procedure that can resolve persistent infection and protect your natural tooth for the long term.
Read articleIn 2023 the International Endodontic Journal devoted an entire supplement to one question: what actually determines whether endodontic treatment works? Here's the honest, patient-friendly summary.
Read articleResearchers built a simulated American Board of Endodontics oral exam — real case workups, 20 open-ended questions per case, graded by two board-certified examiners — and had GPT-4o and Gemini 2.5 Pro take it. Both AI models scored above 2.7 out of 3. The interesting part is what that result does and doesn't mean.
Read articleIf one front tooth has slowly turned gray or brown while the others stayed bright, you're not imagining it — and you're not stuck with it. A darkened tooth from an old injury is one of the most treatable problems an endodontist sees.
Read articleYou've probably heard that oral health is linked to heart disease and diabetes. New research from King's College London puts hard numbers to it — showing what actually changes in the bloodstream after an infected tooth is properly treated.
Read articleTooth emergencies have a talent for arriving Friday night. Here's exactly what happens when you call a weekend endodontist — from the first phone call to walking out with the pain handled.
Read articleWhen your dentist says “I'd like to send you to a specialist for this one,” many patients quietly wonder what's wrong. Nothing is wrong — in fact, that sentence is one of the best signs you've chosen a careful dentist.
Read articleLower front teeth look like the easiest root canals in the mouth: one root, one canal, easy access. A July 2026 Journal of Endodontics study used high-resolution micro-CT to map 100 of them — and found the opposite. Their canals are ribbon-shaped, asymmetric, and wider than any standard instrument can fully touch.
Read articleTwo offices can both say they focus on root canals — yet only one may be run by a residency-trained specialist. The wording on the door tells you which is which, if you know how to read it.
Read articleThe July 2026 issue of the Journal of Endodontics published one of the longest-running root canal outcome studies ever: 7,340 root canals tracked in a single institution from 2008 to 2025. The headline numbers are reassuring — but the study's most practical lesson is about what happens in the weeks after your root canal appointment.
Read articleA root canal can last a lifetime — but the outcome depends on several factors. Here's what the research shows and how to give your tooth the best chance.
Read articleYour dentist referred you to an endodontist — but what does that actually mean? Here's a plain-English explanation of why specialists exist and what they can do for your tooth.
Read articleIf you've just been told you have external cervical resorption, the first question is usually 'can my tooth be saved?' The honest answer is that it depends on how early it's caught and how it's treated — and a 2022 study that followed teeth for up to 10 years shows exactly which factors matter most.
Read articleMost root canals heal predictably — but why do some teeth get infected, hurt more, or take longer to recover than others? A growing body of research points to an unexpected factor: your genes. Here's what the emerging science of precision endodontics means for patients.
Read articleA root canal clears the infection inside a tooth — but new research suggests the benefits may reach far beyond your mouth. A 2025 study tracked patients' blood chemistry for two years and found measurable improvements in glucose and cholesterol metabolism after treatment.
Read articleA vertical root fracture is one of the hardest problems in dentistry to diagnose — and one of the most consequential, because it often decides whether a tooth can be saved. A new 2026 systematic review looked at whether artificial intelligence can help spot these fractures on 3D scans. The results are promising, with an important caveat.
Read articleIf you've ever had a tooth that just wouldn't get numb — or you're dreading that it might happen during your root canal — you're not imagining things. It's a real, well-studied phenomenon, and an experienced endodontist has reliable ways to solve it.
Read articleFacing a severely damaged tooth and unsure whether to save it or pull it? Here's an honest, side-by-side look at root canal treatment versus extraction to help you decide.
Read articleMost root canals can be completed in one appointment, but some teeth do better with two. A 2026 survey of U.S. endodontists reveals what drives that decision — and why the number of visits doesn't change how well treatment works.
Read articleMost cracked posterior teeth can be saved — but a 2026 Journal of Endodontics study of 263 teeth shows the prognosis swings from 98% to 33% depending on crack depth and periodontal status. This is a practical staging and referral guide for general dentists.
Read articleA cracked molar doesn't automatically mean extraction. A 2026 study of 263 cracked teeth found an overall success rate of 82.9% — with prognosis driven by how deep the crack runs and whether a gum pocket has formed along it.
Read articleMolars have two or three roots, and sometimes only one of them is the problem. Root resection and hemisection are decades-old procedures that remove the failing root and keep the rest of the tooth in function — often for 10 or more years. Here's when it works, when it doesn't, and how to decide.
Read articleGoing to an out-of-network endodontist doesn't mean insurance pays nothing. Here's a plain-English breakdown of how PPO reimbursement actually works — and what to expect before your appointment.
Read articleYour first endodontic consultation is more conversation than procedure. Here's a calm, honest look at what Dr. Kung will do, ask, and explain during your visit.
Read articleA May 2026 AAE national survey found only 27% of US adults know a knocked-out tooth has roughly a 30-minute window to be saved, and 60% admit to delaying dental care they knew they needed. The conviction is there — 78% would do almost anything to keep a natural tooth — but the knowledge is not. Here is what the survey reveals, and what to actually do in the moments that matter.
Read articleInside a cave in southern Siberia, researchers have found a Neanderthal molar with a small, deliberately drilled hole on its biting surface. Micro-CT analysis, traceological work, and experimental replication with stone tools point to a single conclusion: someone, 59,000 years ago, performed something startlingly close to a modern root canal.
Read articleIf a previous root canal is failing, the most useful question is no longer 'does retreatment work?' but 'in cases like mine, how well does it work, and what makes the difference?' A 2024 Journal of Endodontics systematic review of 29 studies gives the cleanest contemporary answer yet.
Read articleGentleWave is one of the most heavily marketed technologies in modern endodontics. A new May 2026 scoping review in the Journal of Endodontics looked at 22 studies and reached a conclusion the marketing doesn't capture: against any competent activation technique — ultrasonic, sonic, laser — GentleWave shows no meaningful clinical advantage. Here's the honest read for patients deciding whether to seek out a GentleWave practice.
Read articleOn April 30, 2026, the Journal of Endodontics published a peer-reviewed survey of 1,352 dentists (793 endodontists and 559 general dentists). It's the largest dual-perspective study of root canal referrals ever conducted — and it identified a specific friction point that quietly affects how your tooth gets treated. Here's the finding, why it matters for patients, and how our practice addresses it.
Read articleThe American Association of Endodontists just published updated guidelines for treating dental trauma — from knocked-out teeth to fractures and luxation injuries. Here's what patients should know about the new recommendations.
Read articleThe American Association of Endodontists released its 2026 Endodontist–General Dentist Referral Patterns Survey on May 4. Three findings stand out: 90% of endodontic root canals come from referrals, 53% of all root canal cases now go to specialists (up from 43% in 2012), and 92% of general dentists report a positive perception of endodontists. Here's the practical takeaway for patients.
Read articleOn paper an extraction costs less than a root canal. But the moment a tooth comes out, a long chain of replacement costs begins. Here's the honest math over 10 and 20 years.
Read articleEndodontists have long known that root canal treatment saves teeth. Now a new study suggests it may also reduce the risk of heart disease and diabetes by eliminating a hidden source of chronic inflammation.
Read articleUpper tooth pain, pressure behind the eyes, and stuffiness can point to either a cracked tooth or a sinus infection. Here's how to tell them apart before your symptoms get worse.
Read articleRoot canals are one of the most successful procedures in dentistry — but they aren't perfect. Here's an honest look at how often they fail, what causes failure, and how well retreatment actually works.
Read articleEvery May, the American Association of Endodontists reminds us that nothing replaces your natural tooth. Here's why that message matters more than ever in 2026 — and what it means for patients weighing root canal treatment versus extraction.
Read articleYour dentist referred you to an endodontist for a root canal. Now what? Here's exactly what to do before, during, and after your appointment — a practical checklist so you arrive prepared and leave with one less thing to worry about.
Read articleDental anxiety is one of the most common reasons patients delay root canal treatment — sometimes until the infection becomes a medical emergency. Modern endodontic offices have effective tools to manage fear at every level, from mild unease to severe phobia.
Read articleWhen researchers compared modern apicoectomy outcomes with and without a high-power surgical microscope, the overall difference was 88% vs. 94%. But for molars — the teeth that are hardest to reach, hardest to save, and most expensive to replace — the gap was statistically significant in a way it wasn't for the front teeth.
Read articleWhen implant manufacturers say their devices have a 95%+ success rate, where do those numbers come from? A systematic review of the implant outcome literature found patterns that should make any patient — and every dentist — read industry-sponsored research with a careful eye.
Read articleIf your dentist mentions an apicoectomy, the procedure can sound far more intimidating than it actually is. Here's exactly what happens in the room — drawn from the same step-by-step protocol that endodontic residents learn in school and that Dr. Kung uses for every surgical case.
Read articleA surgical operating microscope is the difference between guessing what's inside a tooth and seeing it clearly at 26× magnification. The published evidence shows it changes outcomes by 10–35 percentage points. Here's why every patient should ask if their endodontist uses one.
Read articleA little soreness after a root canal is completely expected — but how do you know when lingering pain is something more? Here's what to watch for and why.
Read articlePatients are often told that getting an implant is more predictable than saving a natural tooth with a root canal. The published evidence does not support that claim. Here's what 30 years of long-term outcome studies actually show.
Read articleIf your dentist has mentioned an apicoectomy, the technique used matters far more than most patients realize. The largest meta-analysis on the subject found that endodontic microsurgery succeeds in 94% of cases — compared to 59% with traditional surgical methods still common in oral surgery offices.
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