Tooth hard tissue disease

Dentists often replace a failed filling in a baby tooth by drilling it out and starting over. This trial tests a gentler option: repairing just the broken part and leaving the healthy filling in place. Researchers will assign 824 baby molars from children aged 4 to 8 to either re…

This trial tests whether a one-bottle or a two-bottle HEMA-free dental adhesive works better for filling cavities on the front surfaces of teeth. About 50 adults with early to moderate cavities will receive a filling using one of the two adhesives. Researchers will check how well…

This trial compares two ways to treat tooth decay at the gum line in elderly cancer patients. One method uses a silver solution to stop decay without drilling, then places a filling. The other uses the traditional approach of drilling out the decay before filling. The study will …

This trial tests two resin infiltration systems, ICON and I-Mate, to see which better masks white spot lesions on front teeth and matches the natural tooth color. Researchers will enroll 50 people aged 16 to 35 who have non-cavitated white spots, often from previous braces. Parti…

This study tests whether one or two applications of 38% silver fluoride can stop cavities in the baby teeth of children aged 4 to 6 years. Researchers compare a single treatment against two treatments given three months apart, and also measure how the children's oral health affec…

This study looks at how well children regain their chewing strength after getting a crown on a decayed baby molar. It compares two types of crowns: a newer BioFlx crown and the standard stainless-steel crown. Thirty children aged 5 to 8 with tooth decay will receive one of these …

This trial compares two minimally invasive ways to treat cavities in children's back baby teeth. The standard Hall Technique seals the cavity with a stainless steel crown, without drilling or numbing. The SMART Hall technique adds a silver diamine fluoride (SDF) coating before se…

This trial tests two tooth-colored filling materials for cavities between the back baby teeth of children aged 4 to 7. One filling is a zirconia-fortified glass ionomer, and the other is a resin-modified glass ionomer. Dentists will place the fillings after removing decay and the…

This trial tests two different pastes—calcium hydroxide-iodoform and a modified triple antibiotic—used in a procedure called LSTR to treat severely infected baby molars in children aged 4 to 7. The goal is to see which paste better stops infection, relieves pain, and preserves th…

This Phase 2 trial tests whether a topical drug called KH001 can preserve the pulp (nerve) inside teeth with deep cavities. Adults with deep dentinal caries will receive either KH001 or a placebo applied to the cavity. The study tracks how many people develop irreversible pulpiti…

This trial compares two types of zirconia crowns—custom-made versus prefabricated—for restoring severely decayed baby molars after a pulpotomy (a procedure to save the tooth). Children aged 5-8 with deep cavities in their primary molars will receive one of the two crowns, and res…

This study compares two ways to handle severely decayed front baby teeth in children aged 3 to 5: restoring them with zirconia crowns or simply extracting them. Researchers want to see which approach leads to better quality of life, parental satisfaction, child self-image, and sp…

This study compares toothpaste tablets to a standard toothpaste (Colgate Cavity Protection) for cleaning teeth and gums. Fifty adults will use one of the two products for six weeks. Researchers will measure plaque, gum inflammation, and cavities before and after the trial to see …

This study compares two dental filling materials for cavities that form near the gum line (cervical lesions). One is a self-hardening composite, the other a flowable composite. Fifty adults will receive one of the two fillings and be checked over 18 months to see which stays in p…

This study investigates how bacteria that cause tooth decay and gum disease spread among family members. Researchers will treat either the child alone, the child and parents, or all family members with professional dental cleaning. They will track bacterial transmission using DNA…

This study compares 3D-printed resin crowns to standard stainless steel crowns for children's back teeth that have had pulp treatment. Twenty-six children aged 4 to 8 will receive one type of crown and be followed for a year. The goal is to see if the 3D-printed crowns lead to he…

This study compares two types of computer-designed and milled inlays—hard hybrid ceramic and resin composite—for repairing large cavities in vital back teeth. Fifty healthy adults aged 16 to 50 with a single molar needing a large filling will receive one of the two inlays. Resear…

This study compares two treatments for severely damaged lower molars: a tooth-saving surgery called hemisection (removing the damaged root) versus replacing the whole tooth with a dental implant. Researchers will track 28 participants over 12 months to see which option leads to b…

This study tests whether applying a thin, clear surface sealant over tooth-colored fillings helps prevent discoloration and improves how long the filling lasts. Twenty-five adults with cavities in their back teeth will receive either a sealant or standard polishing. Researchers w…

This study looks at three types of dental cement used to attach zirconia crowns to young children's front teeth. About 120 healthy kids aged 2 to 7 with decayed or injured teeth will get crowns and be checked for up to 3 years. The goal is to see which cement holds the crown best…

This study compares two treatments for severely damaged upper molars: root amputation (removing only the damaged root and keeping the rest of the tooth) versus replacing the whole tooth with a dental implant. Researchers will track pain, bone healing, and implant stability over 1…

This study tests if a new bioactive varnish can fix white spot lesions on teeth better than standard fluoride varnish. About 60 people aged 16-35 with at least four white spots will get one of the two varnishes. Researchers will check how well the spots heal and if tooth color im…

This study tests whether a robot can place dental implants more accurately than a computer-guided navigation system in the front upper jaw. Twenty-four adults needing an implant will be randomly assigned to one of the two methods. The main goal is to see which approach achieves b…

This study compares two types of dental fillings for cavities in the back teeth. Researchers will test a bulk-fill flowable resin against a submicron hybrid resin in 25 patients over 18 months. The goal is to see which filling performs better in terms of shape, comfort, and appea…

This study tests a new type of tooth filling that sticks to the tooth without needing a separate bonding step. Researchers will compare it to the standard filling method in 75 adults with small to moderate cavities near the gum line. The fillings will be checked over 18 months fo…

This study compares three types of dental fillings—bioactive, nanohybrid, and bulk-fill—for treating cavities between teeth. Sixty adults with at least three cavities will receive each type of filling and be monitored for up to four years. The goal is to see which material holds …

This study will test a new injectable tooth filling material against a standard one for fixing cavities between baby molars in children aged 3 to 8. Fifty kids will get one of the two fillings, and dentists will check how well they hold up over a year. The goal is to see which fi…

This study will compare two treatments for cavities in children's back baby teeth. One uses a new injectable bioactive filling material, and the other uses the Hall Technique (placing a metal crown without drilling). About 50 children aged 3-8 with moderate cavities will be follo…

This study tests whether using plaque-disclosing dyes (like erythrosine) with a special light can kill more cavity-causing bacteria in children aged 3 to 7 years. Seventy-two kids at high risk for cavities will get either standard dental cleaning or cleaning plus the dye-and-ligh…

This study compares two types of tooth-colored fillings—injectable and packable—for cavities in children's back baby teeth. Researchers will check how well each filling holds up over time using dental exams and X-rays. The goal is to see if the injectable type, which may be easie…

This study will compare Bioflx crowns (a newer, tooth-colored material) with standard stainless steel crowns for children aged 6 to 9 who have had pulp treatment on their back baby teeth. The goal is to see how each crown affects bite force and the space between teeth, and how sa…

This study will test four different dental filling materials in 92 children aged 4-8 who have cavities in their baby molars. The fillings include newer materials like Cention N and Stela, as well as standard options like Beautifil II and resin-modified glass ionomer. Researchers …

This study compares two methods of moving canine teeth after premolar extraction: one with a minor surgical procedure (corticotomy) to speed movement, and one without. Sixty patients aged 12–30 will have their root length measured before and after treatment to see which method ca…

This study tests a new material made from treated dentin and calcium silicate for treating deep cavities that have reached the tooth's nerve. The goal is to see if it can keep the nerve healthy better than the current standard material. Fifty-six people aged 14 to 35 with deep ca…

This study will test whether 3D-printed fillings work as well as standard bulk-filled resin ones for large cavities in back teeth. About 50 adults aged 22 to 45 with deep decay in a molar will receive one of the two filling types. Researchers will check the fillings' strength, fi…

This study tests a new material called NeoPutty MTA against a standard chemical, formocresol, for treating deep cavities in children's back baby teeth. About 68 kids aged 4 to 9 will get one of the two treatments to save the tooth and prevent pain or infection. Researchers will c…

This study looks at how well a new type of dental filling (bioactive restorative system) works in people with controlled diabetes compared to those without diabetes. Fifty adults needing a filling in a back tooth will be followed for 18 months. Researchers will check for discolor…

This study tests two cavity-stopping liquids in 60 children aged 3-5 with active tooth decay. One is a well-known treatment that turns cavities black; the other is a newer version that may avoid staining. Researchers will check which works better over 12 months, and ask parents a…

This study tests whether a mouthwash made from moringa leaves can reduce dental plaque, bacteria, and early cavities as well as the standard chlorhexidine rinse. Researchers will enroll 90 adults with mild gum inflammation and moderate-to-high cavity risk. Participants will use e…

This study tests whether silver diamine fluoride or silver fluoride, sometimes with a special LED light, can stop early cavities in the back teeth of young adults. About 366 high-risk dental students will receive one of these treatments. The goal is to see which approach works be…

This study compares two types of dental glue used to attach braces to teeth. One is a traditional three-step system, the other a simpler two-step system. The goal is to see which causes less damage (white spots) to tooth enamel. Thirty-four teenagers will have each type of glue u…

This study tests whether a new bioactive filling material helps teeth repair themselves after deep cavities are removed. 66 adults with deep decay will get either the bioactive filling or a standard one. Researchers will check for new tooth layer formation and pain over 2 years.

This study compares the natural chewing stick Miswak to standard fluoride toothpaste for managing tooth sensitivity and preventing cavities in children aged 6-12 with a condition called Molar-Incisor Hypomineralization (MIH). MIH causes weak, discolored enamel that is prone to pa…

This study compares a new, easier-to-use tooth-colored filling material to a standard one for cavities between back teeth. Fifty adults aged 18-64 with cavities will receive one of the two fillings and be checked after 12 months for how well they hold up, look, and feel. The goal…

This study tests a new type of dental filling made with graphene, a super-strong material, for teenagers aged 10-16 who have weak enamel (a condition called MIH). The fillings are custom-made using a digital scanner and are meant to be more durable and less sensitive than standar…

This study looks at whether applying cold (cryotherapy) during a pulpotomy—a procedure that removes infected nerve tissue from a tooth—improves the chance of saving the tooth. Researchers will compare treatment success in 140 healthy adults with deep cavities. Success means no pa…

This study compares two dental treatments for teeth with deep cavities and reversible pulpitis (early nerve inflammation). One treatment caps the exposed nerve directly, while the other removes a small part of the nerve before capping. The study will include 138 people aged 15-40…

This study will test whether a liquid called silver diamine fluoride works as well as gentle fillings (atraumatic restorative treatment) for stopping cavities in children aged 2 to 5. About 156 kids from kindergartens will get one of the two treatments, and researchers will check…

This study compares two dental procedures for treating deep cavities in baby molars of children aged 6-8. One group gets a partial nerve treatment (pulpotomy) using a special cement, while the other gets a full root canal (pulpectomy) with a medicated paste. Researchers will trac…

This study will compare two dental filling materials—alkasite-based resin and nanohybrid composite resin—for treating cavities in the chewing surfaces of children's baby molars. About 50 children aged 4-6 will receive one of the two fillings and be checked at 3, 6, and 12 months …

This study tests a new root canal filling made from zinc oxide and ozonated olive oil against a standard material called Metapex in children aged 3-5 with cavities in their front teeth. Over 12 months, researchers will check for pain, swelling, and healing on X-rays. The goal is …

This study looks at how different 3D-printed materials affect gum health and restoration success in teeth with deep cavities that need margin elevation. Researchers will treat 48 patients and check their teeth at 6 and 12 months using dental and gum health scores. The goal is to …

This study compares two cavity removal methods in 144 adults with deep cavities and reversible pulpitis (tooth nerve inflammation that can heal). One method removes all decay, the other leaves some near the nerve. Researchers will check pain, tooth vitality, and X-rays over 12 mo…

This study tests how mouth rinses made with monk fruit or Splenda affect saliva acidity and levels of cavity-causing bacteria. 90 healthy young adults (ages 20-24) with no active cavities will rinse with one of the sweetener solutions. Saliva samples will be checked before rinsin…

This study tests whether a special silver liquid (silver diamine fluoride) can stop tooth decay in elderly people living in nursing homes. Sixty participants will either get the silver treatment or a placebo, and their teeth will be checked after 6 and 12 months. The goal is to i…

This study tests whether different fluoride treatments—like varnishes, solutions, and mousse—can stop root cavities from getting worse in adults over 44. About 136 participants in Switzerland will use these products at home or get them applied by a dentist twice a year. The goal …

This study compares a new material made from eggshells (calcium hydroxyapatite) to a standard one (calcium hydroxide) for protecting the nerve in deep cavities. Fifty-four adults with reversible pulpitis will receive one of the two materials after cavity cleaning. Researchers wil…

This study will test two types of dental cement—bioactive and resin—to see which one works better for putting zirconia crowns on children's front teeth. Sixty kids with cavities in at least two baby teeth will get crowns, and researchers will check how well the crowns stay on, if…

Researchers are testing a device called BlueCheck to see if it can reliably find early enamel lesions and track how they change over 12 weeks. Participants aged 13 and older with active enamel lesions but no cavities needing immediate fillings receive high-fluoride toothpaste and…

This study compares artificial intelligence analysis of dental photographs to standard clinical exams for detecting white spot lesions—early signs of tooth decay. Researchers will train AI models (YOLO and Mask-RCNN) on 329 labeled images from adult patients at Cairo University D…

This study will check if smartphone photos, 3D dental scans, and a special fluorescent light can accurately detect early cavities in people who have finished braces. Thirty participants aged 11 to 46 with early white spots on their teeth will be followed for three months. Researc…

This study tests a handheld scanner that uses safe near-infrared light to find early cavities without radiation. Fifty adults scheduled for a tooth extraction will get an extra 5-minute scan before their procedure. The scanner's results will be compared to standard X-rays and vis…

Researchers in Suzhou, China, are testing whether a comprehensive oral health program in preschools and primary schools can reduce tooth decay. The program includes lessons on oral hygiene, guided toothbrushing and rinsing practice, and support from teachers and parents. About 2,…

This trial tests whether training nursing home staff to provide better oral hygiene can reduce pneumonia in residents aged 60 and older. Participants will use special toothpastes and mouthwashes, including stannous fluoride and chlorhexidine options. The study measures how many r…

This trial tests whether sending oral health tips via WhatsApp to mothers, in addition to standard face-to-face advice, improves their knowledge and their children's toothbrushing habits. Mothers of children aged 3 to 6 will receive either usual education alone or with 16 additio…

This trial tests whether swabbing toddlers' teeth with povidone iodine can prevent tooth decay and reduce cavity-causing mouth germs. Children aged 1 to 3 will have their teeth swabbed weekly for the first month and then monthly, with some also receiving a daily probiotic. The st…

This trial tests whether a silver nanoparticle mouthwash can reduce cavity-causing bacteria in children as effectively as chlorhexidine, but without the staining and taste issues. About 96 children aged 6–12 at high risk for cavities will rinse twice daily for 14 days. The study …

This trial tests whether cleaning the chewing surfaces of children's teeth with a fine erythritol powder spray (Guided Biofilm Therapy) before applying a protective sealant helps the sealant stay in place longer than the standard rotary-brush polishing. Each child aged 6–10 will …

This trial tests whether a fluoride-releasing adhesive used to attach braces can prevent white spot lesions—early signs of decay—on teeth. About 40 adolescents getting braces will have standard adhesive on one side of their upper jaw and the fluoride sealant on the other. After 3…

This study tests whether applying povidone iodine (a disinfectant) to toddlers' teeth before fluoride varnish prevents cavities better than fluoride varnish alone. About 393 children aged 6-24 months with healthy teeth or early white spots will be followed to see which approach r…

This study tests if using a diode laser before applying a tooth-colored sealant helps it stick longer and prevent cavities better. About 111 young adults aged 17-22 will get sealants on their back teeth, with or without laser pre-treatment. Researchers will check sealant retentio…

This study tests whether motivational interviewing — a supportive, patient-centered conversation style — can help mothers adopt better oral care habits for their infants, preventing early childhood caries. Researchers will enroll 228 mother-infant pairs in Malaysia, with half rec…

This study will test a new self-sticking dental material against a standard sealant to see which better prevents cavities in children's permanent molars. About 88 healthy kids aged 6-8 with high cavity risk will take part. The goal is to find out which material stays on teeth lon…

This trial tests whether a toothpaste with calcium sodium phosphosilicate reduces tooth sensitivity better than a regular fluoride toothpaste. About 192 adults with sensitive teeth will brush twice daily for 8 weeks. Researchers measure how teeth respond to a puff of air and a ge…

This trial asks whether a newer 'bulk-fill' composite filling causes less tooth sensitivity after cavity repair than the traditional layer-by-layer method. Dentists often apply standard fillings in thin layers to avoid shrinkage gaps, but bulk-fill materials can be placed in thic…

This study tests two simple treatments for tooth sensitivity caused by worn enamel: a blue diode laser and a bioactive glass powder. Thirty adults with two similarly sensitive teeth will each receive both treatments (one per tooth) to see which works better. The goal is to find a…

This study tests whether three different desensitizing toothpastes can reduce tooth sensitivity in people with braces. About 200 adults aged 18-40 with mild to moderate sensitivity will use one of the toothpastes or a placebo for 8 weeks. The goal is to see if the special toothpa…

This study tests whether a special adhesive filled with strontium-doped bioactive glass-ceramic can reduce tooth sensitivity. 142 adults with sensitive teeth will receive a single application of either the new adhesive or a standard one. Pain levels will be checked right after an…

This study compares two ways to remove cavities in children's baby molars: a special gel that softens decay, versus scraping by hand. The goal is to see which method causes less pain and is more acceptable to kids. Twenty-eight healthy children aged 5 to 9 will take part, and the…

This study tests whether a gel made from the Libidibia ferrea plant can reduce tooth sensitivity after professional whitening. Seventy-five adults will receive either the experimental gel, a standard desensitizing gel, or a placebo before bleaching with hydrogen peroxide. Partici…

This study tests whether a gel made from propolis (a bee product) can reduce tooth sensitivity after professional whitening. 66 adults will receive either propolis gel, a standard desensitizer, or a placebo before bleaching. Their pain and color change will be tracked for two wee…

This study compares two self-ligating bracket systems (Damon Ultima and Pitts 21 Pro) in 40 people with mild-to-moderate crowding. Researchers will measure treatment time, pain, root resorption, and alignment quality to see if one system works better. The goal is to find which br…

This study tests a gel called Cariclast that softens tooth decay, allowing dentists to remove cavities without a drill. It will involve 24 children aged 4-7 with cavities in their back baby teeth. The goal is to see if this method causes less pain and is more accepted by kids tha…

This study tests whether applying a dipotassium oxalate gel before placing a filling can reduce tooth sensitivity afterward. 64 adults with sensitive tooth cavities will be randomly assigned to get the gel or standard treatment. Pain is measured at 24 hours, 7 days, and 30 days u…

This study compares different numbing methods to reduce pain during dental cavity treatment. About 204 adults with tooth decay will receive either a light-based device, a numbing gel, or a placebo before local anesthesia. Researchers will measure pain during and after the procedu…

This study compares two treatments for dentin hypersensitivity (tooth sensitivity). One group gets a special varnish (CPP-ACPF) alone, the other gets the varnish plus a low-level laser treatment. 70 adults with sensitive teeth will rate their pain before and after. The goal is to…

This study tests a new gel that dissolves tooth decay without drilling, aiming to reduce patient anxiety. Eighty adults with cavities in lower molars will be randomly assigned to either the gel or a standard drill. The main goal is to see which method causes less pain and discomf…

This study compares two methods for fixing cavities in children's back teeth: the Hall Technique (a less invasive approach) and traditional stainless-steel crowns. Researchers will measure bite force, jaw changes, and child comfort in 22 kids aged 6-9. The goal is to see if the g…

This study compares a single-shade flowable composite resin to a multi-shade composite for filling cavities in back teeth. Thirty adults with at least four cavities will receive both types of fillings and be followed for five years. Researchers will check how well the fillings ma…

This study will compare two treatments—low-level laser therapy and hyaluronic acid gel—to see which helps children's gums heal better after removing a badly decayed first permanent molar. Thirty-six children aged 6 to 10 will receive one of the treatments right after extraction. …

This study tests whether applying Gluma desensitizer before a filling can reduce tooth sensitivity afterward. Sixty adults with cavities in their back teeth will be randomly assigned to get either the desensitizer plus a standard filling or just the standard filling. Their pain r…

This study compares a computer-controlled injection device (Starpen) to a standard syringe for numbing and extracting upper baby molars in 38 children aged 6-8. The goal is to see if the new device causes less pain during the injection. Children will rate their pain using a faces…

Researchers at Kırıkkale University are studying how GLP-1 receptor agonists, drugs prescribed for type 2 diabetes and obesity, affect saliva and oral health. Fifty adults aged 18 to 65 who are newly prescribed these drugs provide saliva samples and undergo dental exams at the st…

This study aims to understand why some teeth fail to erupt (come in) properly. Researchers will look at dental records and test for changes in the PTH1R gene in 50 patients with eruption problems. The goal is to improve diagnosis and distinguish between different causes, such as …

This study aims to find biological markers in saliva, mouth rinse, blood, or tissue that could help identify and predict the course of oral cancer, gum disease, and tooth decay. Researchers will collect health information and samples from 4,000 adults with these conditions and he…

This study looks at how common cavities are in the first permanent molars of 6- to 7-year-old Egyptian children and whether diet and tooth-brushing habits play a role. Researchers will examine 272 children's teeth and ask parents about their child's eating and oral hygiene routin…

This study looks at saliva from people with osteoporosis to measure certain immune markers and an enzyme called MMP-8. Researchers also check participants' dental cavities. The goal is to better understand how osteoporosis might affect oral health. No treatments are given—only sa…

This study looks at how well 3D-printed resin fillings hold up in back teeth with large cavities. Researchers will compare two different ways of shaping the tooth before placing the filling. Fifty adults will be followed for 18 months to see which design leads to fewer cracks or …

This study tests how well three different toothpastes repair early tooth damage (enamel lesions) in 30 healthy adults aged 18-70. Participants wear a removable mouth device with human enamel pieces for 14 days per toothpaste, with breaks in between. Researchers measure mineral ga…

This study asks 200 practicing midwives in Germany about their role in oral health for pregnant women and young children. Through an anonymous online survey, researchers will learn how confident midwives feel giving dental advice, what barriers they face, and what training they n…

This study follows 400 obese adults in Norway to see how weight loss from lifestyle changes, medication, or surgery affects their oral health. Researchers will measure gum disease, cavities, and tooth erosion before and after weight loss. The goal is to understand the link betwee…

This study looks at how stainless steel crowns placed on weak permanent molars (due to a condition called MIH) affect a child's bite and jaw function. Forty-six children will have their teeth scanned before, right after, and up to 3 months after crown placement. The goal is to un…

This study will test five different types of tooth-colored fillings (bulk-fill composites) in 70 adults who need a cavity filled. The fillings use different technologies, like heating or sound waves, to see which one works best. Dentists will check the fillings right after placem…

This study looks at the teeth, mouth, and face health of 25 people with Mowat-Wilson syndrome, a rare genetic condition. Researchers will check for cavities, gum disease, and facial features, and ask about quality of life. No treatment is given—the goal is to gather information t…

This observational study looks at whether eating lots of ultra-processed foods (like chips, soda, and packaged snacks) is linked to cavities and gum disease. Researchers will track the diets and oral health of 200 adults aged 18 to 65. No treatments or changes are given—just care…

This study looks at how two types of dental cement used to attach stainless steel crowns affect gum health in 45 children aged 6-10. Researchers measured gum inflammation and certain immune markers before and one week after placing the crowns. The goal is to see if one cement cau…

This study looks at 1,200 preschool children to understand why some get severe tooth decay. Instead of just looking at teeth, researchers will also study family stress, parenting burnout, children's sleep, and diet. The goal is to create a tool that predicts which kids are most a…

This study looks at how well a special type of dental filling called Giomer works in people with and without diabetes. Researchers will place fillings in cavities on the tooth neck and check them over 18 months to see if they stay in place and prevent new decay. The goal is to un…

This study looks at whether sending short dental health videos through WhatsApp can improve how much 10-12 year old children in Cairo know about taking care of their teeth, and whether it changes their brushing and eating habits. About 150 children will take part, with one group …

This study looks at people with Enamel Renal Syndrome, a rare genetic condition that causes calcium deposits in the body, leading to kidney and blood vessel problems. Researchers will measure kidney function and test how the body handles calcium, phosphate, water, and acid. The g…

This study looks at 58 children with deep cavities in their baby molars. Dentists will perform a pulpotomy (removing the infected nerve and sealing the tooth) and measure levels of cytokines—substances that signal inflammation—in the pulp. The goal is to see if these levels can p…