Mouthguards for a childhood hypophosphatasia patient to protect periodontal tissue of immature permanent teeth – Case report

Abstract Hypophosphatasia (HPP) is an inherited skeletal disorder that features early exfoliation of primary teeth as a major dental manifestation. A 6Y4M Japanese girl diagnosed with childhood HPP came to our clinic. Deep probing depth for all teeth and severe mobility of primary incisors were observed. At 7Y1M, the mandibular central incisors received a traumatic injury, with no treatment performed and slight mobility observed thereafter. Such traumatic injuries were repeated, thus mouthguards (MGs) to protect weak periodontal tissue were applied, which helped to maintain stable conditions. Use of a MG may be helpful for HPP patients.