Background: Ectopic eruption of the permanent first molar is a common eruption disorder occurring during mixed dentition. The prevalence of this condition ranges from 3% to 4% in children. It is described as an abnormal mesioangular eruption path of the first permanent molar with a possibility of initiating the premature resorption of the distal root of the adjacent primary second molar. Non-treatment can result in the early loss of the second primary molar, space loss, and impaction of second premolars. Various treatment modalities have been mentioned in the literature for the management of ectopic eruption.
Aim: This article presents the case of an eight-year-old boy with irreversible bilateral ectopic eruption of the permanent maxillary first molars.
Case description: A modifed Croll\'s appliance was the treatment of choice to correct the path of eruption of the latter molars. An activation of the appliance was performed at intervals of two weeks.
Conclusion: The result was obtained six weeks later and a regular follow-up was scheduled.
Chapman H. First upper permanent molar partially impacted against second deciduous molar. Int J Orthod Oral Surg Radiogr 1923;9: 339–345. DOI: 10.1016/S0099-6963(23)80023-0.
American Academy of Pediatric Dentistry. Guideline on Management of the Developing Dentition and Occlusion in Pediatric Dentistry. Pediatr Dent 2016 Oct;37(6):289–301.
Nam OH, Ahn HJ, et al. Treatment of ectopic permanent maxillary first molar using a K-loop. J Clin Pediatr Dent 2015;39(4):387–391. DOI: 10.17796/1053-4628-39.4.387.
Nagaveni NB, Radhika NB. Interceptive orthodontic correction of ectopically erupting permanent maxillary fIrst molar. A case report. Virtual Journal of Orthodontics December 2010.
Young DH. Ectopic eruption of the first permanent molar. J Dent Child 1957;24:153–162.
Poornima P, Pathak S, et al. Simple treatment of ectopic eruption with a stainless steel crown. CHRISMED J Health Res 2015;2:289–291. DOI: 10.4103/2348-3334.158719.
Pomarico L, Guimarães L, et al. Ectopic eruption of the maxillary central permanent incisors and mandibular first permanent molars: report of an unusual case. Quintessence Int 2006;37:677–683.
Machado AW, Braga E. Unilateral impaction of a maxillary first molar treated in the transitional dentition. Pediatr Dent 2014;36: 502–504.
Badakar C, Kathariya M, et al. Management of bilateral ectopically erupting mandibular molars using Humprey's appliance – a case report. IJRID 2014;4(1):58–64.
Pulver F. The etiology and prevalence of ectopic eruption of the maxillary first permanent molar. ASDC J Dent Child 1968;35(2): 138–146.
Guzeler I, Sara S, et al. Primary tooth radicular resorption as a consequence of self-corrected ectopic eruption: 2 unusual cases. J Dent Child 2011;78(3):159–162.
Kupietzky A. Correction of ectopic eruption of permanent molars utilizing the brass wire technique. Pediatr Dent 2000;22:408–412.
Barberia-Leache E, Suarez-Clúa MC, et al. Ectopic eruption of the maxillary first permanent molar: Characteristics and occurrence in growing children. Angle Orthod 2005;75:610–615. DOI: 10.1043/0003-3219(2005)75[610:EEOTMF]2.0.CO;2.
Weinberger SJ. Correction of bilateral ectopic eruption of first permanent molars using a fixed appliance. Pediatr Dent 1992;14(6):382–383.
Mitsuhata C, Konishi Y, et al. Treatment of ectopic eruption of permanent mandibular first molars with innovative dental appliances. Eur J Paediatr Dent 2014;15(2 Suppl):181–183.
Witchel J. A Simple Treatment for Ectopic Eruption. Ontario Dentist January/February 2015;42–44.
Barberia-Leache E, Suarez-Clua M, et al. Ectopic Eruption of the Maxillary First Permanent Molar: Characteristics and Occurrence in Growing Children. Angle Orthod 2005;75(4):610–615. DOI: 10.1043/0003-3219(2005)75[610:EEOTMF]2.0.CO;2.
Roberts MW. Treatment of ectopically erupting maxillary permanent first molars with a distal extended stainless steel crown. J Dent Child 1986;53:430–432.
Hardwick F. What is ectopic eruption of the maxillary molars, and how should it be managed? JACD 2007;73(6):491–492.
Nolla CM. The development of permanent teeth. J Dent Child 1960;27:254–256.
Croll TP. Correction of first permanent molar ectopic eruption. Quintessence Int 1984;15(12):1239–1246.
Kennedy DB. Clinical tips for the Halterman appliance. Pediatr Dent 2007;29:327–329.
Ackerman JL, Proffit WR. Diagnosis and planning treatment. Graber TM, Swain BF. Current Orthodontic Concepts and Techniques. Philadelphia, Pa: WB Saunders Co, 1975; p. 51.
Kurol J, Bjerklin K. Resorption of maxillary second primary molars caused by ectopic eruption of the maxillary first permanent molar. A longitudinal and histological study. ASDC J Dent Child 1982;49: 273–279.