Mini-implant assisted palate expansion and digital design in junctional epidermolysis bullosa and amelogenesis imperfecta: Case report.

Background: Junctional epidermolysis bullosa (JEB) is one of the four major types of EB caused by genetic variants in the genes coding the proteins of the lamina lucida. All patients with this major type of EB present syndromic hypoplastic amelogenesis imperfecta (AI), with either a pits and fissures or generalized hypoplastic phenotype. Severe forms of AI are associated with compromised oral health-related quality of life (QoL) mostly due to poor dental aesthetics, dentofacial anomalies, and oral pain.

Aim: To present the comprehensive dental treatment of a patient with JEB and AI from the age of 20 months until the age of 18 years, including complex orthodontics and digital oral rehabilitation.

Materials and methods: A male patient with intermediate JEB (homozygous c.3228+1G>A LAMB3 variant) has been under the care of the special care dentistry clinic of the University of Chile since the age of 20 months. His complex dental needs include structural enamel abnormalities in primary and permanent dentition (hypoplastic generalized AI), severe dental crowding with maxillary compression, Class III skeletal pattern, agenesia (#45), and gingivitis.

Results: Pediatric dental care included oral hygiene education and preventive strategies (prophylaxis and fluoride applications), maintaining the dentition free of caries. Due to AI, severe tooth sensitivity hindered proper oral hygiene and required early rehabilitation with temporary polycarbonate and metallic crowns. At the age of 16, the patient began orthodontic treatment. A maxillary expansion was performed with two consecutive mini-implant assisted rapid palate expansion (MARPE) bonded to four mini-implants in the palate. After finishing orthodontic treatment metallic multibrackets (duration 19 months), a definitive oral rehabilitation based on digital smile design with feldspathic crowns of all anterior teeth and premolars was performed.

Conclusion: Patients with severe generalized hypoplastic syndromic AI associated with JEB benefit from long-term preventive oral care. Complex orthodontic techniques, such as MARPE, and multibrackets can be successfully. Digital smile design provides a definitive oral rehabilitation technique improving oral function, aesthetics, and QoL.