Ankylosis, mechanical and primary failure of eruption of molar teeth are rare and often difficult to distinguish between. All may have significant repercussions on the occlusion and successful management may involve invasive procedures. We present a case where an initial presentation characteristic of mechanical failure of eruption (ankylosis) of a first permanent molar tooth was excluded following a period of monitoring. Subsequent relief of crowding using a removable and then sectional fixed orthodontic appliance allowed spontaneous eruption of the tooth obviating the need for surgical intervention. This case highlights the utilisation of conservative treatment options until a diagnosis was confirmed to minimise the risk of iatrogenic damage and unnecessary treatment.
AhmadS, BisterD, CobourneMT. 2006. The clinical features and aetiological basis of primary eruption failure. Eur J Orthod. 28:535–540.
2.
AnderssonL, BlomlofL, LindskogS, FeiglinB, HammarstromL.1984. Tooth ankylosis. Clinical, radiographic and histological assessments. Int J Oral Surg. 13(5):423–431.
3.
AnderssonL, MalmgrenB.1999. The problem of dentoalveolar ankylosis and subsequent replacement resorption in the growing patient. Aust Endod J. 25(2):57–61.
4.
AndreasenJO, KristersonL.1981. The effect of limited drying or removal of the periodontal ligament. Periodontal healing after replantation of mature permanent incisors in monkeys. Acta Odontol Scand. 39(1):1–13.
5.
BansalA, PrakashAT, DeepthiNA. 2015. A noble, easy and conceptual radiographic analysis to assess the type of tooth movement (molar distalization). J Clin Diagn Res. 9(8):Zc22–Zc25.
6.
BrezniakN, WassersteinA.2002. Orthodontically induced inflammatory root resorption. Part I: the basic science aspects. Angle Orthod. 72(2):175–179.
7.
DeckerE, Stellzig-EisenhauerA, FiebigBS, RauC, KressW, SaarK, RuschendorfF, HubnerN, GrimmT, WeberBH. 2008. PTHR1 loss-of-function mutations in familial, nonsyndromic primary failure of tooth eruption. Am J Hum Genet. 83(6):781–786.
8.
EnaiaM, BockN, RufS.2011. White-spot lesions during multibracket appliance treatment: a challenge for clinical excellence. Am J Orthod Dentofacial Orthop. 140(1):e17–e24.
9.
Frazier-BowersSA, KoehlerKE, AckermanJL, ProffitWR. 2007. Primary failure of eruption: further characterization of a rare eruption disorder. Am J Orthod Dentofacial Orthop. 131(5):578e1–11.
10.
Frazier-BowersSA, SimmonsD, WrightJT, ProffitWR, AckermanJL. 2010. Primary failure of eruption and PTH1R: the importance of a genetic diagnosis for orthodontic treatment planning. Am J Orthod Dentofacial Orthop. 137(2):160e161–160e167.
11.
FurutaM.2001. Measurement of orbital volume by computed tomography: especially on the growth of the orbit. Jpn J Ophthalmol. 45(6):600–606.
12.
GroverPS, LortonL.1985. The incidence of unerupted permanent teeth and related clinical cases. Oral Surg Oral Med Oral Pathol. 59(4):420–425.
13.
HammarströmL, BlomlöfL, LindskogS.1989. Dynamics of dentoalveolar ankylosis and associated root resorption. Dent Traumatol. 5(4):163–175.
14.
KangSH, KimMK, LeeJY. 2016. Single-tooth dento-osseous osteotomy with a computer-aided design/computer-aided manufacturing surgical guide. J Korean Assoc Oral Maxillofac Surg. 42(2):127–130.
15.
KurolJ.2006. Impacted and ankylosed teeth: why, when, and how to intervene. Am J Orthod Dentofacial Orthop. 129(4 Suppl):S86–S90.
16.
LangJ.1983. Clinical anatomy of the head. Berlin: Springer-Verlag.
17.
LittlewoodSJ, TaitAG, MandallNA, LewisDH. 2001. Orthodontics: The role of removable appliances in contemporary orthodontics [10.1038/sj.bdj.4801170]. Br Dent J. 191(6):304–310.
18.
McKeownHF, SandlerJ.2001. The two by four appliance: a versatile appliance. Dent Update. 28(10):496–500.
19.
MistryVN, BarkerCS, James SpencerR.2017. The first permanent molar: spontaneous eruption after a five-year failure. Int J Paediatr Dent. 27(5):428–433.
20.
PithonMM. 2016. Surgical luxation and orthodontic traction of an ankylosed upper first molar. J Clin Orthod. 50(5):299–306.
21.
ProffitWR, VigKW. 1981. Primary failure of eruption: a possible cause of posterior open-bite. Am J Orthod. 80(2):173–190.
22.
RaghoebarGM, BoeringG, VissinkA, StegengaB.1991. Eruption disturbances of permanent molars: a review. J Oral Pathol Med. 20(4):159–166.
23.
RhoadsSG, HendricksHM, Frazier-BowersSA. 2013. Establishing the diagnostic criteria for eruption disorders based on genetic and clinical data. Am J Orthod Dentofacial Orthop. 144(2):194–202.
24.
SharmaG, KneafseyL, AshleyP, NoarJ.2016. Failure of eruption of permanent molars: a diagnostic dilemma. Int J Paediatr Dent. 26(2):91–99.
25.
Valmaseda-CastellónE, De-la-Rosa-GayC, Gay-EscodaC.1999. Eruption disturbances of the first and second permanent molars: results of treatment in 43 cases. Am J Orthod Dentofacial Orthop. 116(6):651–658.
