A review of 32 studies published this month in BDJ Open found that clear aligners were associated with better periodontal health, less early treatment pain, and improved quality of life than braces.
by Genni Burkhart, Editor
Most patients considering orthodontic treatment begin with the same priorities. They want an appliance that's comfortable, discreet, and fits their daily routine. However, dentists have to answer those questions while also considering:
- How will this patient maintain oral hygiene?
- Could periodontal health become a concern?
- Is the appliance appropriate for the type of tooth movement required?
Those conversations happen every day in dental practices, yet much of the guidance has relied on individual studies and clinical experience. Now, one of the largest reviews to date, published in BDJ Open, offers a clearer picture of what the evidence shows.
The review included 32 studies comparing clear aligners with fixed orthodontic appliances and examined periodontal health, pain, and quality of life during treatment. Across those studies, patients treated with clear aligners generally had better periodontal outcomes, reported less pain during the early stages of treatment, and described a better oral health-related quality of life than patients wearing fixed appliances.
While fixed appliances can be the preferred option for many patients, the latest evidence provides a strong foundation for discussing how appliance selection can influence oral health throughout the course of treatment.
The Review's Most Consistent Finding
The strongest evidence in the review involved periodontal health, an outcome that affects every orthodontic patient regardless of case complexity.
Across this study, patients wearing clear aligners consistently accumulated less plaque, experienced less gingival inflammation, and demonstrated better periodontal measurements than patients treated with fixed appliances.
Most dentists have probably seen this in practice. Brackets and wires create more surfaces where plaque can accumulate, making brushing and flossing more difficult, even for motivated patients. However, individual studies don't always point in the same direction, and clinical experience naturally varies from one practice to another. Here, the authors found the same periodontal trends repeatedly across a much larger body of evidence. That doesn't make the findings absolute, but it does make them harder to dismiss as isolated observations.
The results also give dentists another way to personalize treatment discussions. Patients with inconsistent oral hygiene or existing gingival inflammation may benefit from understanding how different appliances could affect daily plaque control throughout treatment.
Periodontal Health, Only Part of the Story
This review goes beyond plaque scores and gingival measurements.
Researchers also compared patient-reported pain, asking whether one appliance consistently produced a different treatment experience than the other. Here again, clear aligners showed an advantage, although the findings were more nuanced than those for periodontal outcomes.
Patients wearing clear aligners generally reported less pain during the early stages of treatment. However, as treatment continued, those differences became much smaller. That distinction is important because it helps set realistic expectations. While the evidence doesn't suggest clear aligners eliminate orthodontic discomfort, it does suggest they make the transition into treatment easier for many patients. As treatment progresses, those differences become much smaller regardless of appliance choice.
Overall Treatment Experience
Pain wasn't the only patient-reported outcome that favored clear aligners.
Patients treated with clear aligners generally reported a better oral health-related quality of life than those wearing fixed appliances. The authors suggest that easier oral hygiene, less discomfort, and fewer disruptions to daily routines all contributed to those findings.
Taken together, the results point in the same direction. Patients wearing clear aligners generally found the treatment easier to manage day-to-day. That doesn't outweigh treatment mechanics or clinical outcomes, but it does reinforce that the patient's experience deserves consideration alongside the final result.
Building Stronger Clinical Conversations
Like any systematic review, this one has limitations. The authors acknowledge variation among the included studies, modest differences for several outcomes, and the continued importance of patient compliance. Essentially, clear aligners can only deliver their intended benefits when patients wear them consistently.
Even with those limitations, these findings were remarkably consistent. Patients treated with clear aligners generally maintained better periodontal health, experienced less pain during the early stages of treatment, and reported a better quality of life than those wearing fixed appliances.
No single study determines how orthodontic treatment should be planned, and no single appliance is the right choice for every patient. Yet this review reinforces what many dentists have observed for years. Appliance selection influences more than tooth movement. It can also shape oral health and the patient's experience throughout treatment, giving dentists another evidence-based way to guide initial conversations with orthodontic patients.
Author: With over 16 years as a published journalist, editor, and writer, Genni Burkhart's career has spanned politics, healthcare, law, business finance, technology, and news. She resides in Northern Colorado, where she works as the editor-in-chief of the Incisor at DOCS Education.
Reference
- Kaur, K., Quadri, S.A., Saini, R.S. et al. Comparative impact of clear aligners versus fixed orthodontic appliances on periodontal health, pain, and quality of life: a systematic review and meta-analysis. BDJ Open 12, 60 (2026). https://doi.org/10.1038/s41405-026-00450-z
