Dentists, General

• Hand instruments + foot-treadle drill1840–1864

  Hand instruments + foot-treadle drill (pre-electric era)

  The dental instruments of the 1840s were descendants of barber-surgeon tools: hand scalers, extraction forceps, and a foot-pedal-powered drill introduced around 1790 by John Greenwood (George Washington's dentist) adapted from a spinning wheel. Cavity preparation was performed by hand excavators or the slow foot-treadle drill running at 100-300 RPM. The founding of the Baltimore College of Dental Surgery in 1840 standardized the teaching of these techniques for the first time. The defining technology shift of this era was not mechanical but pharmacological: Horace Wells' discovery of nitrous oxide anesthesia in December 1844 transformed dentistry from an ordeal to a procedure patients could actually tolerate. William Morton's demonstration of ether anesthesia in 1846 confirmed the principle. Together, these discoveries expanded the pool of patients willing to seek care and the range of procedures a dentist could perform.

  Effect on the work

  Anesthesia dramatically expanded effective demand for dental services. Before 1844, many patients would endure years of dental disease rather than submit to extraction without anesthesia. The profession grew from 13,000 practitioners in 1871 to roughly 30,000 by 1900, tracking the anesthesia-driven expansion of willing patients.

• Electric dental drill1864–1896

  Electric dental drill (Green, 1864) and cavity preparation science

  In 1864, Dr. George F. Green patented the first electric-powered dental drill, which ran at a then-impressive 3,000 RPM. James B. Morrison commercialized a practical foot-engine drill in 1871 that became standard in dental offices over the following two decades. These drills were still slow by modern standards (300-3,000 RPM) and generated heat that required frequent pausing for cooling, but they were far faster and more controllable than hand excavators. G.V. Black, the "Grand Old Man of Dentistry," developed the principles of cavity preparation (extension for prevention, resistance and retention form) in the 1880s-1890s that are still taught in dental schools today. Black's classification of carious lesions (Classes I through VI) standardized the diagnosis and treatment of tooth decay across the profession for the first time.

• Dental X-ray1896–1957

  Dental X-ray (Roentgen 1895; Kells first clinical use 1896)

  Wilhelm Roentgen discovered X-rays on November 8, 1895. Within weeks, Otto Walkhoff in Germany had taken the first dental radiograph (a 25-minute exposure of his own teeth) in January 1896. New Orleans dentist Edmund Kells made the first clinical use of dental X-rays in a US practice in 1896, and by 1900 dentists recognized that radiographs could reveal interproximal caries, bone levels, and root morphology invisible to clinical examination alone. The dental X-ray transformed diagnosis from a primarily symptom-driven exercise into a systematic screen for disease the patient had not yet noticed. It also exposed a generation of early adopters to radiation: Kells, who pioneered X-ray use without knowing its dangers, lost fingers, hands, and ultimately his life to radiation-induced cancer by 1928. Radiation safety protocols were not standardized until the 1920s-1930s. By the mid-20th century, intraoral periapical and bitewing radiographs were the central diagnostic tool of every dental office.

  Effect on the work

  Radiographic diagnosis enabled dentists to detect interproximal caries earlier, when conservative treatment (small fillings) was possible, rather than after the decay had become clinically symptomatic. This shifted the economics of dental practice toward more, smaller interventions and gave dentists a diagnostic capability that technicians could not replicate.

• High-speed air-turbine handpiece1957–1987

  High-speed air-turbine handpiece (Borden Airotor, 1957) and panoramic X-ray

  In 1957 two transformative dental technologies arrived almost simultaneously. John V. Borden developed the Airotor: a high-speed air-turbine dental handpiece capable of 300,000 RPM, compared to the 3,000-10,000 RPM of previous electric drills. The high-speed turbine cut tooth structure 10-20 times faster with far less pressure and heat, reducing patient discomfort and procedure time dramatically. The first commercial panoramic X-ray unit (the Orthopantomograph, developed by Finnish scientist Yrjo Paatero and commercialized by Siemens from 1960) followed shortly after: a single X-ray image that captured all 32 teeth, both jaws, the TMJ joints, and surrounding bone. These two tools defined the equipment of the general dental office for the next three decades: the high-speed handpiece for preparation, the panoramic for screening, and periapical films for detail. Cavity preparation became faster, more comfortable, and more precise. The panoramic image enabled dentists to evaluate bone levels, detect impacted third molars, and identify pathology across the entire jaws in a single view.

  Effect on the work

  The high-speed handpiece reduced the time required for cavity preparation by 50-70%, enabling dentists to see more patients per day. The productivity increase supported the rapid growth of dental practices and contributed to the rising incomes of the profession in the 1960s-1970s.

• Digital radiography1987–2010

  Digital radiography (RVG, 1987) and CAD/CAM chairside milling (CEREC, 1987)

  By coincidence, two landmark dental technologies launched in the same year. Trophy Radiology in France introduced the RadioVisioGraphy (RVG) digital intraoral sensor in 1987: the first intraoral digital X-ray system, reducing patient radiation dose by up to 80% compared to conventional film and eliminating the 90-second film-development step. Dr. Werner Mormann and Dr. Marco Brandestini at the University of Zurich simultaneously launched CEREC (Chairside Economical Restoration of Esthetic Ceramics), the first CAD/CAM dental milling system, enabling a dentist to take a digital optical impression, design a ceramic crown on a computer, mill it from a ceramic block, and deliver it in a single appointment. Digital radiography gradually displaced film-based radiographs over the following 20 years; by 2010 the majority of new dental offices in the US were film-free. CEREC spread more slowly due to initial cost (units were $100,000+) but established that a dentist could own a digital workflow for restoration fabrication without a dental laboratory.

  Effect on the work

  Digital radiography eliminated the darkroom, the chemical developer, and the film consumable cost from every dental office. CEREC demonstrated that the dental laboratory step (historically a 2-week turnaround for porcelain crowns) could be compressed to a single appointment, reducing lab fees and enabling same-day delivery of ceramic restorations.

• Intraoral scanning2010–2021

  Intraoral scanning and cone-beam CT (CBCT) in general practice

  The 2010s brought two imaging modalities from specialty practice into mainstream general dentistry. Intraoral scanners (iTero launched for general dentistry 2011; 3Shape TRIOS 2010) replaced physical impressions for crown and bridge cases with real-time 3D digital captures, reducing patient discomfort and eliminating the polyvinyl siloxane impression material that had been standard since the 1960s. Cone-beam computed tomography (CBCT) units, previously used only in oral surgery and orthodontics, dropped in price enough to appear in general practices: by 2015 the cost had fallen from $250,000 to under $80,000, making pre-surgical 3D bone imaging for implant placement accessible to general dentists. Dental implant placement by general dentists grew substantially in this period as CBCT-guided surgical planning reduced the risk of nerve injury and implant failure. Invisalign's ClinCheck aligner-planning platform also matured in this decade, enabling general dentists to offer comprehensive orthodontic treatment without orthodontist training for the first time at scale.

• AI radiographic analysis2021–present

  AI radiographic analysis (Pearl, Overjet, VideaHealth: FDA-cleared 2021-2022)

  In 2021, Pearl Second Opinion (K211016) and Overjet (K212171) received FDA 510(k) clearance as AI-based dental radiographic analysis tools, followed by VideaHealth (K213201, 2022). These systems superimpose real-time AI findings (caries, bone loss, calculus, periapical lesions, restoration defects) directly onto dental X-rays within the dentist's existing viewer, requiring no change to the radiographic workflow. Peer-reviewed validation studies documented meaningful diagnostic improvements: Pearl increased caries detection sensitivity from 55% to 74% in a blinded study (Journal of Dentistry, 2024); VideaHealth AI showed an 18.2% improvement in caries detection accuracy vs. dentist-alone in a multi-site blinded RCT of 50 general dentists (JADA, 2025). By 2025, over 10,000 US dental offices were using AI radiographic analysis, and 34% of dentists reported using AI diagnostic tools, up from 8% in 2022. The ADA Ethics Code (2025) explicitly defines these tools as decision-support: the dentist of record retains full diagnostic accountability and must review and approve all AI findings before any clinical action. Adoption is moving fastest among Dental Support Organization (DSO)-affiliated practices: 61% of DSO dentists vs. 22% of solo-practice dentists reported using AI imaging tools in 2025.

  Effect on the work

  AI radiographic analysis has not reduced dentist employment but has shifted what dentists are valued for within the examination: from manual detection (finding the lesion on the X-ray) toward clinical integration (deciding what the AI-flagged finding means in the context of this patient's full clinical picture). Practices using AI imaging tools report 18-30% improvements in case acceptance rates, suggesting the technology increases revenue per dentist rather than displacing dentist positions.

What's changing in your day

Three parts of your work where AI is already doing real lifting, and what stays yours.