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Semantics of Dental Terminology

Oral health professionals should consider using terminology that facilitates better chronic oral disease management.

While the semantics of dental terminology may not seem highly significant, I believe that using the correct verbiage greatly impacts the practice and profession of dentistry. In this Guest Editorial, I make a case for using the plural term “periodontal diseases” over the singular term “periodontal disease.”

Early in my dental career, it appeared as if many in dentistry were intellectually hypnotized by the incredible successes of modern dentistry. The term “permanent” was commonly used to characterize many dental treatments. This concept of permanence was not without merit because many dental procedures provided long-lasting (in some cases, lifelong) biological and functional solutions. Indeed, my own mouth has amalgam and gold restorations that have served well for decades, some for 60 years or more.

Back then nearly all dentists seemed to believe that treating periodontitis was a one-shot-done-for-good endeavor. Later on, as we came to know more about the biology and biochemistry of periodontitis, periodontal specialists commonly found themselves befuddled by referrers’ requests that the former “just do the perio and get the patient back to me ASAP.” Unfortunately, this mindset remains common. Therefore, it is no surprise that most patients believe there are straightforward, permanent solutions to every oral disease.

As we all know, this concept of permanence is more hope than fact in all areas of dentistry—but especially in the context of common forms of periodontitis. Thus, as a profession that cares about our patients, we need to work to limit the problematic effects of such beliefs.


So what might this mean in the context of calling periodontitis periodontal diseases instead of using the traditional term “periodontal disease?” Calling periodontitis a disease is not semantically incorrect. In fact, the formal definition of disease is loose and inclusive. But those who are interested in how to best manage maladies—especially chronic ones like periodontitis—ought to encourage and adopt terminology that facilitates better management, rather than persist in using terms that can hinder such management. This is why the widespread adoption of the term periodontal diseases in place of periodontal disease is both important and useful. Here’s why:

1. Periodontitis has many causes that almost always involve myriad microbial species in the context of varied host responses. When considering the many microbial, anatomical, and biochemical permutations of periodontitis, the term “disease” can be misleading in the context of how patients and, even many practitioners, think. This is because periodontitis differs from person to person, from site to site, and even from time to time in the same individual.

2. The use of the singular term “disease” is not uncommon in similar contexts, (eg, heart disease). However, the casual use of a singular term is misleading in the context of how patients tend to envision a disease, namely a malady with a singular (and usually known) cause, with a fairly predictable course, straightforward and successful treatments, and a predictable end state. For example, measles, scarlet fever, and many others disorders have known etiologies, similar clinical presentations, and predictable courses. Periodontitis fits this continuum only in its clinical presentation; it occurs at what might be considered a “weak spot” in the anatomy. An anatomy that was an evolutionary compromise that provided animals hard, articulating oral structures that incise or chew, thus facilitating the digestion of food that, in turn, allowed animals to mature, successfully reproduce, and rear their offspring, but nothing more. This same observation can be made for all so-called “chronic diseases of aging.” In other words, evolution did not select against these maladies because they tend to occur past age 40.

3. Because patients can be misled by the singular term “disease,” it increases the difficulty of getting patients involved in the management of periodontitis, which is almost always a chronic malady that responds best if managed daily. In reality, the singular term “disease” may encourage fatalism. For example, the continuing casual use of the scary, generic, and largely outmoded term “cancer” is a good example because al­though all cancers share a few dynamics, they have different clinical courses, with many cancers now curable. Yet many lay people don’t know this. Indeed, a relative of mine recently died from a skin cancer that’s almost always easily and successfully treated. She suffered from a fatalistic view regarding a cancer diagnosis—a fear that scared her away from timely assessment and intervention, and cost her her life.

4. Perhaps periodontitis might better be termed a syndrome instead of a disease in order to facilitate patient education and daily participation in its management.

5. If periodontitis is not to be termed periodontal syndrome or periodontal destructive syndrome,1 it might better be called periodontal diseases in contexts in which practitioners seek to maximize both the effectiveness and efficiency of professional and self management.


Is there a downside to using a different term? It seems to me that there is little downside to labeling periodontitis as periodontal diseases instead of periodontal disease. Indeed, for a time, the use of the improved term periodontal diseases was common in scientific publications. Unfortunately, in recent years, this practice has largely fallen by the wayside, but there is no reason that dental hygienists can’t continue to lead the way on this matter. Some might argue that using this better term is far from overwhelmingly important. They may be correct, but with negligible downsides, why not husband all of our resources as we seek to better manage periodontal diseases?


  1. Rethman M. Letter to the editor. J Periodontol. 1993;64:583.

From Dimensions of Dental Hygiene. September 2019;17(8):12–13.

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