Treatment of a Mandibular Molar with Primary Failure of Eruption: A Case Report

Patient Information

A 12-year-old female patient presented to Peking University Shenzhen Hospital in January 2020 with a chief complaint of delayed eruption of her right mandibular first molar. She reported that this dental issue had persisted for six years. The patient’s familial medical history was complex, with an undiagnosed and complicated treatment history involving the left mandible; however, no direct association with primary failure of eruption (PFE) was documented.

Facial examination revealed no notable abnormalities. Intraoral examination demonstrated partial eruption of the crown of the right mandibular first molar, with only the occlusal surface visible. The contralateral left mandibular first molar exhibited normal crown development and normal eruption. The remaining dentition displayed no eruption disturbances. Occlusal assessment showed a Class I molar and canine occlusion on the left side, while the right molars exhibited an open bite with no occlusal contact.