Discussion
Dental crowding is usually a result of the discrepancy between tooth and jaw size. In this case report, the severe dental crowding was likely a result of constricted jaw bones rather than larger teeth since the patient exhibited very narrow maxillary and mandibular arches. This also demonstrates that SJS could have effects not only on general bones but also craniofacial skeletons. Good oral hygiene helps prevent premature loss of primary teeth that could worsen the arch length discrepancy. Therefore, routine dental care and regular dental check-up should be emphasized. The patient’s maxilla is constricted anteriorly and even more so laterally. The mandible is also retrognathic. This could illustrate the effects of myotonia on craniofacial development. Because maxillary and mandibular hypoplasia could be a risk factor in developing pediatric OSA.8 This could mean that patients with SJS are at risks to develop OSA as the patient in this report. However, this correlation has not been previously raised, possibly due to the rarity of SJS. This is the first case report of SJS from Thailand. It is also the first SJS report with a detailed description of craniofacial morphology.