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Treatments for improving iron deficiency anemia are generally aimed at increasing oral iron intake and/or administration. Such treatments, however, have been unsuccessful in managing nutritional disorders, including anemia, in patients with masticatory dysfunction caused by impaired occlusion. Nevertheless, few studies have assessed the potential benefits of providing optimal occlusion in such cases. Here, we report a case involving a 53-year-old woman with iron deficiency anemia, wherein we attempted to facilitate efficient mastication by establishing functional occlusion with dental implant placement. The patient was diagnosed with iron deficiency anemia and hospitalized for blood transfusion 2 years before she visited our dental clinic. At the first visit, her hemoglobin (Hb) and mean corpuscular volume values were low; sodium ferrous citrate administration and dietary guidance led to slight improvement. However, blood transfusions and iron supplementation had been ineffective over longer duration. After dental implant placement, her Hb and mean corpuscular volume values were restored and maintained for >4 years without medication. Through this report, we highlight an alternative, non-pharmacological treatment strategy for iron deficiency anemia.