Prosthodontic treatment must remain grounded in science

Winemaking is often described in poetic terms. Growers refer to wind, rain, sunlight, soil, and season, and to the way each harvest reflects the character of a particular year. Because many variables affect the final result, wine is sometimes said to be created by nature rather than produced by human hands. Behind this language, however, lies a simpler truth: fine wine depends on science.¹ Decisions about ripeness, acidity, fermentation, timing, and mineral balance are not made by intuition alone. Experience matters, but experience is most reliable when guided by a sound understanding of events in the vineyard and in the grape.¹

Prosthodontic treatment is similar in this respect. Many variables, including anatomy, mandibular movement, oral biology, patient adaptation, restorative materials, laboratory procedures, and operator skill, shape the field of prosthodontics. These factors all influence the outcome. Because of this complexity, experienced clinicians often describe prosthodontic care in terms of philosophy, judgment, and experience. That description is reasonable. Prosthodontics is not a purely mechanical exercise. It is a clinical discipline carried out in individual patients under conditions that are rarely ideal and never fully predictable. Complexity, however, should not move the profession away from science. Complexity makes science more necessary.

The greater the number of variables that cannot be fully controlled, the more important it becomes that treatment decisions are anchored in scientifically understood principles. Clinical experience is indispensable, but experience alone is insufficient. Experience can refine treatment, but it should not replace the scientific basis on which treatment rests.

In daily practice, prosthodontists make decisions in the presence of uncertainty. No two patients are identical. No restoration behaves in exactly the same manner in every mouth. No articulation scheme, material, or technique can be applied without interpretation. For that reason, clinical experience naturally carries considerable weight. Experience detached from scientific reasoning, however, can become a habit.² The habit protected by authority rather than examined by evidence can obstruct progress even when a better understanding is available.³,⁴

This tension is not unique to prosthodontics, but it is particularly visible in this field because prosthodontic treatment lies at the intersection of biology, mechanics, and human variability. Scientific thinking in prosthodontics cannot be reduced to one form of evidence. Randomised controlled trials are essential for some questions, particularly when comparative outcomes are under evaluation. Prosthodontic knowledge, however, is also built on biomechanics, anatomy, physiology, materials science, observational research, and quantitative analysis of human function. These are not inferior forms of knowledge. They address different questions.

Occlusal rehabilitation provides a clear example. Concepts developed to guide occlusal treatment were not created arbitrarily. Such concepts emerged from attempts to understand mandibular movement and the functional relationships among anterior guidance, posterior disocclusion, and occlusal morphology.⁵,⁶,⁷ These concepts may be modified as further evidence accumulates, and all clinically influential concepts should remain open to critical scrutiny. Nevertheless, dismissal of a scientifically reasoned clinical concept simply because every element has not been tested by a single preferred study design reflects a misunderstanding of how clinical science develops.

Not every important clinical principle begins with a randomised trial or with a meta-analysis of randomised trials. Some principles arise from the mechanics of movement. Others begin with measurable observations and statistical inference. Still others begin with biological plausibility and are later tested, revised, or limited through research and practice. Science does not consist only of final answers. Science also consists of disciplined ways of asking questions, constructing models, testing assumptions, and refining judgement.

For this reason, the familiar contrast between theory and real practice is often misleading.⁸ Good clinical practice does not stand apart from theory; good clinical practice depends on theory.⁸ Clinical judgement, at its best, is not an alternative to science, but the careful application of science to the individual patient. The patient in the chair is never a statistical average. However, treatment should not be governed by personal conviction alone. Scientific knowledge provides the foundation; clinical expertise interprets that knowledge; patient-specific factors complete the decision.⁹

This principle has become more important as prosthodontics enters a period of rapid technological change. Digital workflows, new restorative materials, and evolving manufacturing systems promise greater accuracy and efficiency. These developments deserve interest, but not uncritical acceptance. Novelty is not evidence. Before a new method is widely adopted, accuracy, reproducibility, biological appropriateness, and clinical relevance should be examined. Those are scientific questions, and they require scientific habits of mind.

Readers of this journal should therefore recognise that scientific thinking is not only the responsibility of researchers. Scientific thinking is also the responsibility of clinicians. To think scientifically is not to deny uncertainty, dismiss experience, or reduce care to numbers. It is to recognise that the complexity of patient care demands more than personal confidence. Patient care demands reasoning that is transparent, disciplined, and open to evaluation.

The art of prosthodontics should be valued. That art reflects judgement, technical skill, and sensitivity to the individual patient. Like the art of winemaking, however, prosthodontic art reaches its highest form only when grounded in science. Without that foundation, craftsmanship may impress; with that foundation, prosthodontic treatment can endure.¹⁰