Supernumerary and supplemental teeth: case report
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1 Supernumerary and supplemental teeth: case report G. LO GIUDICE, V. NIGRONE, A. LONGO, M. CICCIÙ ABSTRACT. Aim is to report the case of a ten year old child affected by a numeric dental anomaly showing the pathologic condition characterised by the simultaneous presence of supernumerary and supplemental teeth. The anomaly was analysed to plan the best surgical and orthodontic treatments. Case report Dental history, clinical and instrumental examinations were made to perform a correct orthodontic examination and diagnosis. A young patient was affected by numeric dental anomaly in the upper jaw. We observed a high number of teeth, specifically two normally formed supplemetary lateral permanent incisors and an unerupted mesiodens placed between the upper central incisors. Firstly, the supplemental lateral teeth were extracted. This surgical therapy and the application of a space maintainer were made to permit the eruption of the permanent canines. Then the mesiodens also underwent surgical treatment (i.e. extraction). Eventually, physiologic eruption of permanent teeth was allowed by the planned surgical-orthodontic treatment. Discussion Aim of the surgical-orthodontic treatment was extraction of the unerupted supernumerary teeth to obtain the physiologic eruption of the permanent ones. Orthodontic treatment is important to solve malocclusions and maintaining the space for the eruption of permanent teeth. Conclusion Aesthetics and function are two important parameters in modern dentistry. All clinicians should try to make a correct and rational diagnosis for both simple and complex dental pathologies. Particularly in young children, invasive and surgical disinclusive techniques can be substituted by interceptive orthodontic treatments. KEYWORDS: Dental anomaly; Hyperdontia; Supplemental and supernumerary teeth. Introduction Numeric dental anomalies can be defined as high frequency diseases, and young children are often affected. Therefore an early diagnosis is important to plan a correct therapy. The increase of this pathology over the last years should be associated with a higher attention paid by paediatricians and dentists. Numeric dental anomalies are characterised by an increased or reduced number of teeth in the jaws. Capozzi et al. [1987] in a work about hyperdontia defined two different pathologic conditions: real hyperdontia (increased number of both primary and permanent teeth) and false hyperdontia, with the concomitant presence of deciduous teeth near the corresponding permanent teeth. Other studies confirm the same results [Capozzi et al.,1987; Cassetta et al., 1994; De Michelis et al., 1992; Orlando et al., 1966; Pezzoli et al., 1969]. Department of Dentistry, University of Messina, Italy dcicciu@unime.it A classification of numeric dental anomalies was published by Tomes [1873], who defined the following. - Supplemental: tooth characterised by the same form and function of adjacent teeth with no anatomical differences. - Supernumerary: tooth characterised by an atypical anatomic form; often these teeth are smaller than normal. Bush classification [1897] analysed the different morphology of supernumerary teeth: - Conic: tooth of a small volume and conic form, its root is short and palatine. - Tubercolate: tooth with several cusps. Its root is short and hooked. - Infundibulform: tooth with a funnel form. Its root is short and conic. A study showed that supernumerary teeth are characterised by regular form and structure. Only conic teeth are affected by different mineral concentrations with irregular dentine [Pezzoli et al., 1969]. Different authors classified supernumerary teeth EUROPEAN JOURNAL OF PAEDIATRIC DENTISTRY VOL. 9/
2 G. LO GIUDICE ET AL. according to their position and location. Mesiodens can be defined a tooth located between central upper incisors; paramolar a tooth placed in molar region; distomolar a tooth that lies distal to the third molar [Bolk, 1914; Sfasciotti et al., 1991]. Supernumerary position was investigated by Capozzi [1987] and De Michelis [1992] in two different scientific works, showing that tooth position can be normal, inverse, transverse or ectopic. A statistic analysis of the supernumerary teeth orientation was made by Tay et al. [1984], concluding that 16.8% of the analysed sample were in the correct position, 77.6% were inverted, and 5.6% were in transverse position. The pathogenesis of this anomaly is still debated. Familiarity is considered the main factor, while phylogenetic theories have only historical value.. Levine, Di Biase, Mckibben, Sykaras, Primosch and Liu studied in their works the high activity of the primitive dental lamina as a possible cause of dental numeric anomaly [Levine, 1961; Di Biase, 1969; Mckibben et al., 1971; Sykaras, 1975; Primosch, 1981; Liu, 1995]. Cleidocranial disostosis is a genetic syndrome characterised by numeric dental anomalies. For this reason genetic factors are highly associated with the real genesis of the disease. Orlando, Capozzi, and Cassetta underlined that numeric dental anomalies can be present also in other genetic syndromes like ectodermic displasy, Crouzon s disease and orofacial syndromes (Sture Weber, Anderson, Gardner, Down) [Orlando et al., 1966; Capozzi et al., 1987; Cassetta et al., 1994]. The frequency of this disease was analysed by Orlando, Mckibben, Primosch, Goaz, Capozzi, Nik- Hussein and Roberts. Those epidemiological reports show that there is high frequency of supernumerary teeth in permanent dentition (3.8%). Frequency in primary dentition is lower (1.8%) [Orlando et al., 1966; Mckibben et al., 1971; Primosch, 1981; Goaz et al., 1986; Capozzi et al., 1987; Nik-Hussein et al., 1996; Roberts et al., 2005]. In 2005, Bryan et al published an investigation on delayed eruption of permanent due to the presence of supernumerary teeth in relation to: root maturity, degree of vertical impaction, and degree of angle of impaction [Bryan et al., 2005]. Feng et al. [2007] in their work about oligodontia and tooth agenesis classified numeric dental anomalies into syndromic and non syndromic, and they concluded that aetiological factors can be associated with genetic mutation. On the other side, Pardo et al. published [2006] an important genetic study of a Chilean family with three different anomalies. They concluded that genetic mutations cannot be always associated with dental numeric anomalies. The development of supernumerary teeth in the mandible in cases with a history of supernumeraries in the pre-maxillary region was analysed by Hall in This work presented four cases in which delayed formation and late eruption of supernumerary teeth in the mandible occurred in patients with a history of supernumerary formation in the pre-maxilla region [Hall et al., 2006]. Chen et al. [2006] published a case report, showing a supernumerary tooth associated with a genetic syndrome, and a literature review highlighting the importance of diagnostic features and treatment options. Bayram et al. published [2006] an investigation on bilaterally impacted maxillary central incisors with surgical exposure and orthodontic treatment. This case report underlines that the origin of impacted upper incisors can be associated with local causes, supernumerary teeth or odontoma. The surgical exposure and orthodontic traction of bilaterally impacted incisors after removal of impacted supernumerary teeth is presented in this report. In the literature the frequency of supernumerary and supplemental teeth is reported to be higher in males than females, the proportion in the permanent dentition is 2:1. However in the primary dentition the ratio is 1:1 [Pezzoli et al., 1969; Brook, 1974; Ravne, 1971; Goaz et al., 1986; Hogstrum et al., 1987; Berrone et al.,1989; Goia et al., 1989; Mitchell, 1989; Cassetta et al., 1994]. Supernumerary primary teeth are found in the incisors area of both jaws. Orlando, Capozzi and Cassetta pointed out the central position of the mesiodens in permanent dentition. Mesiodens is usually located in the premaxilla (64.3%). Other positions can be represented by the third upper molar zone (29.6%), third lower molar area (7.0%), premolar area (7.0%) and lower incisors area (4.2%) [Orlando et al., 1966; Capozzi et al., 1987; Cassetta et al., 1994]. Complications of numeric dental anomalies were analysed by Orlando, Primosch, Capozzi and Cassetta, who concluded that malocclusion is the most frequent complication; it may also be associated with maxillary cysts and neuralgic manifestations [Orlando et al., 1966; Primosch, 1981; Capozzi et al., 1987; Cassetta et al., 1994]. The diagnosis of numeric dental anomaly is 98 EUROPEAN JOURNAL OF PAEDIATRIC DENTISTRY VOL. 9/2-2008
3 SUPERNUMERARY AND SUPPLEMENTAL TEETH generally easy, and it can be made during a clinical examination or radiographic analysis. Supernumerary and supplemental teeth diagnosis was investigated by Olivera and Cozza [Cozza, 2001; Olivera, 2002]. This case report shows the rare presence of supplemental and supernumerary teeth. The early non invasive treatment can be considered the best treatment option. Case report A 10 year old male child was observed at the Department of Dentistry of Messina University. The case history was negative for systemic and local genetic diseases. Clinical examination showed a normal mixed dentition, and the patient was found caries free. Intra-oral examination showed two normal-form supplemental lateral permanent incisors and clinical evidence of malocclusion (Fig. 1). Radiographic analysis showed physiologic mixed dentition and confirmed the presence of two normalform supplemental lateral permanent incisors, and also an unerupted mesiodens between the upper central incisors (Fig. 2, 3). For this reason an orthodontic check-up was performed. Treatment planning was divided into a first surgical phase and a subsequent interceptive orthodontic therapy. Correction of malocclusion aiming to obtain a I molar Class was considered an important parameter to obtain the physiologic upper canine eruption. Surgical extractions of the supplemental teeth and positioning of a space maintainer were made to allow eruption of the permanent canines. Then the inverted mesiodens was also extracted (Fig. 4, 5). After some months, the canines erupted and a good dental alignment in the front upper jaw was obtained. FIG. 1 - Clinical intra-oral view of the two normal-form twins lateral permanent incisors. FIG. 2 - OPT. FIG. 3 - Radiographic view of two normal-form twins lateral permanent incisors and also a no erupted mesiodens placed between superior central incisors. Discussion Case report showed a rare clinical condition: the concomitant presence of supplemental and supernumerary teeth. Robertson et al. reported in 1984 a case of two supplemental lateral incisors in the upper jaw and described the therapy underlining the prognosis. Aim of the therapy was surgical extraction of supernumerary teeth to obtain the physiologic eruption of permanent teeth [Foley et al., 2004]. Surgical therapy is often associated with tooth germ extraction as Sfasciotti et al. showed in 1987 [Sfasciotti et al., 1987] Orthodontic treatment is important to solve malocclusions and maintain the space for permanent EUROPEAN JOURNAL OF PAEDIATRIC DENTISTRY VOL. 9/
4 G. LO GIUDICE ET AL. FIG. 4 - Lateral view Dx e Sn of lateral and central incisors in the upper jaw after treatment. therapeutic option for promoting physiologic tooth eruption. FIG. 5 - Front view. teeth eruptions. Orthodontic treatment was analysed by Orlando, Capozzi, De Michelis, Burrone, Cassetta and Cozza. All authors describe the interceptive treatment to solve these pathologies [Orlando et al., 1966; Capozzi et al., 1987; De Michelis et al., 1992; Burrone et al., 1989; Cassetta et al., 1994; Cozza et al., 2001]. Conclusion Based on the data from the literature and our clinical experience, the following can be concluded. - Dynamic eruptive alterations, influenced by numeric dental anomalies, can be treated by multidisciplinary planning and early diagnosis [Cozza et al., 2006]; - Interceptive orthodontic treatment must be considered important to avoid invasive and traumatic surgical operations. - Radiographic analyses, such as O.P.T. and CT, help early diagnosis and treatment planning. - Numeric dental anomalies can be detected by early diagnosis based on clinical and radiological examinations and plan an adequate therapy. In cases of supernumerary teeth the surgical orthodontic treatment can be considered the best References Alberti G, Mondani PM, Parodi V. Eruption of supernumerary permanent teeth in a sample of urban primary school population in Genoa, Italy. Eur J Paediatric Dent 2006;2: Bayram M, Ozer M, Sener I. Bilaterally impacted maxillary central incisors: surgical exposure and orthodontic treatment: a case report. J Contemp Dent Prat. 2006sep;7(4): Berrone S, Defabianis P, Gallesio C. Valutazione clinicochirurgica delle anomalie dentarie in sovrannumero. Min Stomat 1989;38: Bolk L. Supernumerary teeth in the molar region in man. Dental cosmos 1914;56,154. Brook AH. Dental anomalies of number, form, and size: their prevalence in British Schoolchildren. Journal International Association Dentistry for Children 1974;5: Bryan RAE, Cole BOI, Welbury RR. Retrospective analysis of factors influencing the eruption of delayed permanent incisors after supernumerary tooth removal. Eur J Paediatric Dent 2005; 2: Bush F. Ueber verschmelzung und verwachsung der zähne. Deutshe Mschr Zahneilk 1897;15,480. Capozzi L, Gombos F, Masi P, Modica R, Valletta G. Patologia speciale odontostomatologica. Firenze: Ed. U.S.E.S.; Cassetta M, Russomanno MR. L'iperodontia nei settori lateroposteriori; indagine epidemiologica su pazienti. R.I.S.1994;63(11): Chen ZF, Wu JH, Zhao B, Hao XH, Wu JN. Supernumerary teeth: report of a rare case and review of the literature. Shangai Kou Qiang Yi Xue 2006 Aug; 15 (4) : Cozza P, Mucedero M, Ballanti F, De Toffol L. Supernumerary teeth and mental retardation:the importance of early surgical intervention. Eur J Paediatric Dent 2006;7(1): Cozza P. Supernumerary teeth: diagnosis and treatment. Dent Cadmos 2001;5: De Michelis B, Modica R, Re G. Trattato di clinica 100 EUROPEAN JOURNAL OF PAEDIATRIC DENTISTRY VOL. 9/2-2008
5 SUPERNUMERARY AND SUPPLEMENTAL TEETH odontostomatologica. Torino: Ed. Minerva Medica; Di Biase DD. Midline supernumeraries and eruption of the maxillary central incisor. Dental Practitioner Dental Record 1969;20: Feng HL, Zhang XX, Wu H. Research advances in tooth agenesis. Beijing Da Xue Xue Bao. 2007Feb;39(1):13-7. Foley J. Surgical removal of supernumerary teeth and the fate of incisor eruption. Eur J Paediatric Dent 2004;5(1): Goaz PW, White SC. Radiologia odontoiatrica. Padova: Ed. Piccin; Goia F, Bonello P, Tesi U, Carezzana G. Denti soprannumerari. Min Ortognat1989;7: Hall A, Onn A. The development of supernumerary teeth in the mandible region in cases with a history of supernumeraries in the pre-maxilla region. J Orthod 2006 Dec;33(4): Hogstrum A, Andersson L. Complications related to surgical removal of anterior supernumerary teeth in children. ASDC J Dentistry Children 1987;54: Humerfelt D, Hurlen B, Humerfelt S. Hyperdontia in children below four years of age: a radiographic study. ASDC J Dentistry Children 1985;52: Levine N. The clinical management of supernumerary teeth. J Canadian Dental Association 1961;28: Liu JF. Characteristics of pre-maxillary supernumerary teeth: a survey of 112 cases. ASDC J Dentistry children 1995;62: Luten JR. The prevalence of supernumerary teeth in primary and mixed dentitions. ASDC J Dentistry Children 1967;34: Mckibben DR, Brearly LJ. Radiographic determination of the prevalence of selected dental anomalies in children. ASDC J Dentistry Children 1971;28: Mitchell L. Supernumerary teeth. Dental Update 1989;16: Nik-Hussein N, Majid Z. Dental anomalies in the primary dentition: distribution and correlation with the permanent dentition. J Clin Pediatr Dent 1996;21:15-9. Olivera LM, Primo LG. Radiographic diagnosis of supernumerary teeth: report of six unusual cases. ASDC J Dent Child 2002;69: Orlando S, Bernardini UD. Considerazioni sulle anomalie dentali numeriche per eccesso. RIS 1966;21(12): Pardo VR, Castillo TSR,Viera A. Genetic studies of Chilean family with three different dental anomalies. Rev Med Chil 2006 Dec;134(12): Pezzoli M, Vercellino V, Borio PS. Considerazioni cliniche sulle anomalie dentarie di numero, per eccesso, nella dentizione permanente. Min Stomat 1969;18: Primosch R. Anterior supernumerary teeth-assessment and surgical intervention in children. Pediatric Dentistry 1981;3: Ravn JJ. Aplasia, supernumerary teeth and fused teeth in the primary dentition. An epidemiological study. Scandinavian J Dental Research 1971;79:1 6. Roberts A, Barlow ST, Collard M, Hunter ML. An unusual distribution of supplemental teeth in the primary dentition. J Clin Pediatr Dent 2005;15: Robertson NR, Jones ML, Roberts WR. Bilateral supplemental laterals: an unusual transplantation approach. Br J Orthod 1984;11(1):21-3. Sfasciotti GL, Ciangola R. Valutazione critica di un caso di iperodontia in zona molare. Quaderni di Odontostomatologia 1991;8 (3): Sfasciotti M, Isidori F. Indicazioni all'uso dei sindesmotomi di Bernard. Riv Ital Odont Prot Dent 1987;5:6-11. Sykaras SN. Mesiodens in primary and permanent dentition. Oral Surgery, Oral Medicine, Oral Pathology 1975;39: Tay F, Pang A, Yuen S. Un-erupted maxillary anterior supernumerary teeth: report of 204 cases. ASDC J Dentistry Children 1984;51: Tomes TC. Traité de chirurgie dentarie. Paris: Ed. Savy; EUROPEAN JOURNAL OF PAEDIATRIC DENTISTRY VOL. 9/
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