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Abouzeir S, Gurgel-Georgelin M, Diemer F, Esclassan R, Noirrit-Esclassan E, Canceill T. Therapeutic solutions for anterior restorations in disabled patients: Systematic review and case report. SPECIAL CARE IN DENTISTRY 2024; 44:369-380. [PMID: 37470748 DOI: 10.1111/scd.12905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 07/03/2023] [Accepted: 07/09/2023] [Indexed: 07/21/2023]
Abstract
INTRODUCTION Treating anterior restorations is a real challenge for a dentist and conventional protocols are not always applicable. The aim of this study is to determine different therapeutic to conducting anterior restorations in disabled people. CASE REPORT We begin by presenting the case of a 23-year-old, handicapped man, who was brought in consultation to compensate for the loss of the left upper central incisor (#21). MATERIALS AND METHODS We then performed a systematic literature review in December 2022, in accordance with the PRISMA guidelines. The publications, on three databases, dealing with dental treatments on disabled people were selected whether they were clinical studies or case reports. RESULTS In the end, 14 publications were included. Most of the treatments described in the studies (n = 10; 71.43%) concern people aged under 19. The patients present different types of handicaps with various degrees of severity and the oral diseases described are as heterogeneous as the handicaps retrieved. DISCUSSION It is therefore difficult to make common treatment recommendations for all these variable profiles and situations. Most of patients in this study are very young, so there is a need for preventive and therapeutic care as earlier as possible, to preserve the vitality of their teeth and dental occlusion.
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Affiliation(s)
- Salomé Abouzeir
- Faculté de Santé, Département Odontologie, Hôpitaux de Toulouse, Université Paul Sabatier, Toulouse Cedex 9, France
| | - Marie Gurgel-Georgelin
- Faculté de Santé, Département Odontologie, Hôpitaux de Toulouse, Université Paul Sabatier, Toulouse Cedex 9, France
- InCOMM (Intestine ClinicOmics Microbiota & Metabolism) UMR1297 Inserm/Université Toulouse III, French Institute of Metabolic and Cardiovascular Diseases (i2MC), Toulouse, France
| | - Franck Diemer
- Faculté de Santé, Département Odontologie, Hôpitaux de Toulouse, Université Paul Sabatier, Toulouse Cedex 9, France
- InCOMM (Intestine ClinicOmics Microbiota & Metabolism) UMR1297 Inserm/Université Toulouse III, French Institute of Metabolic and Cardiovascular Diseases (i2MC), Toulouse, France
| | - Rémi Esclassan
- Faculté de Santé, Département Odontologie, Hôpitaux de Toulouse, Université Paul Sabatier, Toulouse Cedex 9, France
- Centre d'Anthropobiologie et de Génomique de Toulouse, Faculté de Médecine Purpan, Université Paul Sabatier Toulouse III, Toulouse, France
| | - Emmanuelle Noirrit-Esclassan
- Faculté de Santé, Département Odontologie, Hôpitaux de Toulouse, Université Paul Sabatier, Toulouse Cedex 9, France
| | - Thibault Canceill
- Faculté de Santé, Département Odontologie, Hôpitaux de Toulouse, Université Paul Sabatier, Toulouse Cedex 9, France
- InCOMM (Intestine ClinicOmics Microbiota & Metabolism) UMR1297 Inserm/Université Toulouse III, French Institute of Metabolic and Cardiovascular Diseases (i2MC), Toulouse, France
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Lips A, Calvano Küchler E, Ribeiro Madalena I, Nivoloni Tannure P, Santos Antunes L, Azeredo Alves Antunes L, Castro Costa M, Proff P, Kirschneck C, Baratto-Filho F. Non-syndromic supernumerary teeth and association with a self-reported family history of cancer. J Orofac Orthop 2023:10.1007/s00056-023-00504-z. [PMID: 38051344 DOI: 10.1007/s00056-023-00504-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Accepted: 10/09/2023] [Indexed: 12/07/2023]
Abstract
BACKGROUND Supernumerary teeth are an alteration of dental developmental and result in the formation of teeth above the usual number. Epidemiologic studies suggested that patients with dentofacial anomalies and their family members may present an increased risk of developing cancer, including female breast cancer and gynecologic cancers. These observations indicate that genetic alterations that result in dental anomalies may be related to cancer development. Thus, the aim of the present study was to evaluate the association between supernumerary teeth and a family history of female breast cancer and gynecologic cancers. METHODS The diagnosis of supernumerary teeth was based on clinical and radiographic examinations. For data collection, a questionnaire asking for information regarding ethnicity, age, gender, and self-reported family history of cancer up to the second generation was used. Statistical analysis was performed using the Χ2 test and Fisher's exact test with an established α of 5%. RESULTS A total of 344 patients were included; 47 of them had one or more non-syndromic supernumerary teeth (not associated with any syndrome or cleft lip and palate) and 297 were control patients. Age, ethnicity, and gender distribution were not statistically different between the group with supernumerary teeth and the control group (p > 0.05). The supernumerary teeth were most commonly observed in the incisors area. Breast cancer (n = 17) was the most commonly self-reported type of cancer, followed by uterine cervical (n = 10), endometrial (n = 2), and ovarian (n = 1) cancers. Endometrial cancer was significantly associated with the diagnosis of supernumerary teeth (p = 0.017). CONCLUSION This study suggests that patients with supernumerary teeth possess a higher risk of having family members with endometrial cancer.
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Affiliation(s)
- Andrea Lips
- Department of Dentistry, University of Joinville Region, Joinville, SC, Brazil
| | - Erika Calvano Küchler
- Department of Orthodontics, Medical Faculty, University Hospital Bonn, Welschnonnenstr. 17, 53111, Bonn, Germany.
| | - Isabela Ribeiro Madalena
- Department of Dentistry, University of Joinville Region, Joinville, SC, Brazil
- School of Dentistry, Presidente Tancredo de Almeida Neves University Center, São João del Rei, MG, Brazil
| | | | - Leonardo Santos Antunes
- Postgraduate Program in Dentistry, Health Institute of Nova Friburgo, Fluminense Federal University, Nova Friburgo, RJ, Brazil
| | - Livia Azeredo Alves Antunes
- Postgraduate Program in Dentistry, Health Institute of Nova Friburgo, Fluminense Federal University, Nova Friburgo, RJ, Brazil
| | | | - Peter Proff
- Department of Pediatric Dentistry and Orthodontics, Rio de Janeiro Federal University, Rio de Janeiro, RJ, Brazil
| | - Christian Kirschneck
- Department of Orthodontics, Medical Faculty, University Hospital Bonn, Welschnonnenstr. 17, 53111, Bonn, Germany
| | - Flares Baratto-Filho
- Department of Dentistry, University of Joinville Region, Joinville, SC, Brazil
- School of Dentistry, Tuiuti University from Parana, Curitiba, PR, Brazil
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Yalcin TY, Bektaş Kayhan K, Yilmaz A, Göksel S, Ozcan İ, Helvacioglu Yigit D. Prevalence, classification and dental treatment requirements of dens invaginatus by cone-beam computed tomography. PeerJ 2022; 10:e14450. [PMID: 36523480 PMCID: PMC9745910 DOI: 10.7717/peerj.14450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Accepted: 11/01/2022] [Indexed: 12/12/2022] Open
Abstract
Background This study aimed the evaluation of the prevalence, characteristics, types of dens invaginatus (DI) and co-observed dental anomalies to understand dental treatment requirements in anterior teeth that are susceptible to developmental anomalies by using cone-beam computed tomography (CBCT). Methods In this retrospective study, the anterior teeth of 958 patients were evaluated by using CBCT for the presence of DI. The demographic features, types of DI and treatment requirements were also recorded. The association between sex and the presence of DI was evaluated using chi-squared test. Results Seventy-three DI anomalies were detected in the anterior teeth of 49 patients (18 females, 31 males). The frequency of DI was 5.11% and the most frequently involved teeth were lateral (57.53%). Forty-six teeth were classified as Type I (63.01%), 24 as Type II (32.87%), and three as Type III (4.10%). Apical pathosis was found to be 20.54% in all DIs detected and accounted for all Type III and one-third of Type II. Conclusions CBCT imaging can be effective in the detection of dental anomalies such as DI and planning for root canal therapy and surgical treatments. Prophylactic interventions might be possible to prevent apical pathosis with the data obtained from CBCT images.
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Affiliation(s)
- Turgut Yagmur Yalcin
- Department of Endodontics, Faculty of Dentistry, Istanbul University, Istanbul, Turkey
| | - Kıvanç Bektaş Kayhan
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Istanbul University, Istanbul, Turkey
| | - Ayca Yilmaz
- Department of Endodontics, Faculty of Dentistry, Istanbul University, Istanbul, Turkey
| | - Sevde Göksel
- Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Istanbul University, Istanbul, Turkey
| | - İlknur Ozcan
- Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Istanbul University, Istanbul, Turkey
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Smith-Guzmán NE. A paleoepidemiological approach to the challenging differential diagnosis of an isolated 1500-year-old anomalous molar from Panamá. INTERNATIONAL JOURNAL OF PALEOPATHOLOGY 2022; 39:1-13. [PMID: 36029689 DOI: 10.1016/j.ijpp.2022.07.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 07/02/2022] [Accepted: 07/03/2022] [Indexed: 06/15/2023]
Abstract
OBJECTIVE This study seeks to quantify the presence and prevalence of specific genetic and infectious diseases in the pre-Colombian Panamanian population and uses these data to consider the plausibility of these diseases as causative factors in the development of an abnormal supernumerary cusp morphology in a 1500-year-old isolated molar recovered from Cerro Juan Díaz (Los Santos, Panama). MATERIALS 267 individuals from pre-Columbian sites throughout Panama. METHODS The anomalous tooth was analyzed through macroscopic, odontometric, and radiographic means. Tentative differential diagnosis was performed using inferences from paleopathological features of the broader regional population. RESULTS The regional sample showed evidence of treponemal infection and developmental anomalies in 10.1% and 10.9% of individuals, respectively. CONCLUSIONS While not able to rule out three potential genetic conditions, more evidence was found to support the differential diagnosis of congenital syphilis as the causative agent leading to the development of abnormal supernumerary cusps in the isolated molar. SIGNIFICANCE This study demonstrates how characterizing disease experience in the population can assist in differential diagnoses at the individual level and cautions against the assumption that any one lesion in isolation is unique to only one specific pathological condition. LIMITATIONS The timing discrepancy between clinical descriptions of congenital syphilis and genetic disorders, lack of knowledge on pathophysiological mechanisms of the former, poor preservation of Treponema pathogen ancient DNA, and deficiencies in modern public health data from Panama limit the differential diagnosis. SUGGESTIONS FOR FURTHER RESEARCH Inclusion and serious contemplation of genetic diseases in paleopathological differential diagnoses is necessary.
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Chalakkal P, De Souza N, Martires S, Soares R. Oral manifestations of Nance–Horan syndrome: A report of a rare case. Contemp Clin Dent 2019; 10:174-177. [PMID: 32015664 PMCID: PMC6975004 DOI: 10.4103/ccd.ccd_490_18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Nance–Horan syndrome (NHS) or X-linked cataract dental syndrome is an extremely rare condition affecting multiple systems. It is characterized by ophthalmological, dental, and facial anomalies. Individuals display facial dysmorphism, mandibular prognathism, congenital cataract, and strabismus. Common dental findings include notching of incisors, supernumerary teeth, and mulberry molars. This article aims to provide an update on NHS while reporting previously unreported findings such as talon's cusp and taurodontism.
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Sacks L. Multiple supernumerary teeth in a likely syndromic individual from prehistoric Illinois. Arch Oral Biol 2018; 93:100-106. [PMID: 29886284 DOI: 10.1016/j.archoralbio.2018.06.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Revised: 05/10/2018] [Accepted: 06/02/2018] [Indexed: 10/14/2022]
Abstract
OBJECTIVE This paper reports the first published case of a prehistoric human with five or more supernumerary teeth. Such cases are often neglected in paleopathology, in part due to a gap between the medicodental and anthropological literature leading to the view in anthropology that supernumerary teeth are curious anomalies rather than pathologies. DESIGN Reconstruction and pathological description of the skeletal remains were performed according to standard osteological protocols. Each supernumerary tooth was categorized based on its morphology, location, and orientation. The dental characteristics of the individual were compared to published norms for incidences of syndromic and non-syndromic supernumerary teeth and a differential diagnosis was subsequently performed. RESULTS Six supernumerary teeth and one deciduous tooth were identified. Additionally, the individual suffered from impacted teeth, dilacerated roots, and extensive sutural anomalies (including retention of the metopic suture into adulthood and an unusually high number of sutural bones). The morphology and location of the supernumerary teeth, in conjunction with the suite of other symptoms, are highly unusual among non-syndromic patients and therefore are indicative of a complex genetic disorder. CONCLUSIONS The individual reported here almost certainly suffered from a genetic disorder or syndrome resulting in extensive dental and sutural abnormalities. Despite a lack of post-cranial involvement, a tentative diagnosis of Cleidocranial Dysplasia was made on the basis that mutations in the RUNX2 gene may cause the dental symptoms without any pathology of the clavicle.
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Affiliation(s)
- Lita Sacks
- Anthropology Department, Indiana University, 701 E. Kirkwood Avenue, Room 130, Bloomington, IN 47401, USA.
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A novel small deletion in the NHS gene associated with Nance-Horan syndrome. Sci Rep 2018; 8:2398. [PMID: 29402928 PMCID: PMC5799206 DOI: 10.1038/s41598-018-20787-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Accepted: 01/24/2018] [Indexed: 11/29/2022] Open
Abstract
Nance-Horan syndrome is a rare X-linked recessive inherited disease with clinical features including severe bilateral congenital cataracts, characteristic facial and dental abnormalities. Data from Chinese Nance-Horan syndrome patients are limited. We assessed the clinical manifestations of a Chinese Nance-Horan syndrome pedigree and identified the genetic defect. Genetic analysis showed that 3 affected males carried a novel small deletion in NHS gene, c.263_266delCGTC (p.Ala89TrpfsTer106), and 2 female carriers were heterozygous for the same variant. All 3 affected males presented with typical Nance-Horan syndrome features. One female carrier displayed lens opacities centered on the posterior Y-suture in both eyes, as well as mild dental abnormalities. We recorded the clinical features of a Chinese Nance-Horan syndrome family and broadened the spectrum of mutations in the NHS gene.
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Gjørup H, Haubek D, Jacobsen P, Ostergaard JR. Nance-Horan syndrome-The oral perspective on a rare disease. Am J Med Genet A 2016; 173:88-98. [PMID: 27616609 DOI: 10.1002/ajmg.a.37963] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Accepted: 08/21/2016] [Indexed: 11/11/2022]
Abstract
The present study describes seven patients with Nance-Horan syndrome, all referred to a specialized oral care unit in the Central Denmark Region. A literature search on "Nance Horan Syndrome" resulted in 53 publications among which 29 reported on dental findings. Findings reported in these papers have been systematized to obtain an overview of the reported findings and the terminology on dental morphology. All seven patients included in the present study showed deviations of crown morphology on incisors and/or molars. The only consistent and very clear dental aberration was alterations in the tooth morphology that is screwdriver-shaped incisors and bud molars being most pronounced in the permanent dentition, but were also present in the primary dentition. In addition, three patients had supernumerary teeth, and three had dental agenesis. In conclusion, a dental examination as a part of the diagnostic process may reveal distinct characteristics of the dental morphology, which could be of diagnostic value and facilitate an early diagnosis. In the description of molar morphology in NHS patients, it is recommended to use the term "bud molar." The combination of congenital cataract, screwdriwer-shaped incisors and bud-shaped molars is a strong clinical indication of Nance-Horan syndrome. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Hans Gjørup
- Section of Oral Health in Rare Diseases, Department of Maxillofacial Surgery, Aarhus University Hospital, Aarhus, Denmark
| | - Dorte Haubek
- Section for Pediatric Dentistry, Department of Dentistry, Health, Aarhus University, Aarhus, Denmark
| | - Pernille Jacobsen
- Department of Specialized Oral Health Care, Viborg Regional Hospital, Central Jutland, Viborg, Denmark
| | - John R Ostergaard
- Center for Rare Diseases, Department of Pediatrics, Aarhus University Hospital, Aarhus, Denmark
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Lubinsky M, Kantaputra PN. Syndromes with supernumerary teeth. Am J Med Genet A 2016; 170:2611-6. [DOI: 10.1002/ajmg.a.37763] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2016] [Accepted: 05/12/2016] [Indexed: 01/24/2023]
Affiliation(s)
| | - Piranit Nik Kantaputra
- Center of Excellence in Medical Genetics Research; Chiang Mai University; Chiang Mai Thailand
- Division of Pediatric Dentistry; Faculty of Dentistry; Department of Orthodontics and Pediatric Dentistry; Chiang Mai University; Chiang Mai Thailand
- Dentaland Clinic; Chiang Mai Thailand
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Capar ID, Ertas H, Arslan H, Tarim Ertas E. A retrospective comparative study of cone-beam computed tomography versus rendered panoramic images in identifying the presence, types, and characteristics of dens invaginatus in a Turkish population. J Endod 2015; 41:473-8. [PMID: 25595467 DOI: 10.1016/j.joen.2014.12.001] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2014] [Revised: 11/28/2014] [Accepted: 12/01/2014] [Indexed: 12/17/2022]
Abstract
INTRODUCTION This study assessed the presence, characteristics, and type of dens invaginatus (DI) by using cone-beam computed tomography (CBCT) and panoramic images rendered from CBCT images. In addition, the findings of the imaging techniques were compared. METHODS We evaluated 300 CBCT images to determine the type of DI, the presence of an impacted tooth near the DI, and the presence of apical pathosis. The McNemar test was used to compare the prevalence of DI according to CBCT and panoramic images rendered from CBCT images. RESULTS The presence of DI was lower on panoramic images rendered from CBCT images (3% of the patients) compared with on CBCT images (10.7% of the patients) (P < .001). According to the CBCT images, the distribution of teeth with DI was as follows: maxillary lateral incisors (75%), maxillary central incisors (6.8%), mandibular premolars (4.6%), mesiodens (9%), maxillary canines (2.3%), and mandibular canines (2.3%). Type I DI was the most commonly observed type of invaginatus (65.9%), followed by type II (29.5%) and type III (4.6%). All patients with type III DI and 25% of the patients with type II DI had apical pathosis at the time of referral, but periapical lesions were not observed in teeth with type I DI. In total, 13.6% of DI cases had impacted teeth. CONCLUSIONS CBCT can be recommended as an effective diagnostic device for identifying DI because it provides an accurate representation of the external and internal dental anatomy.
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Affiliation(s)
- Ismail Davut Capar
- Faculty of Dentistry, Department of Endodontics, İzmir Katip Çelebi University, İzmir, Turkey.
| | - Huseyin Ertas
- Faculty of Dentistry, Department of Endodontics, İzmir Katip Çelebi University, İzmir, Turkey
| | - Hakan Arslan
- Faculty of Dentistry, Department of Endodontics, Atatürk University, Erzurum, Turkey
| | - Elif Tarim Ertas
- Faculty of Dentistry, Department of Oral Diagnosis and Radiology, İzmir Katip Çelebi University, İzmir, Turkey
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Abstract
The aim of the present work is to analyze all scientific evidence to verify whether similarities supporting a unified explanation for odontomas and supernumerary teeth exist. A literature search was first conducted for epidemiologic studies indexed by PubMed, to verify their worldwide incidence. The analysis of the literature data shows some interesting similarities between odontomas and supernumerary teeth concerning their topographic distribution and pathologic manifestations. There is also some indication of common genetic and immuno-histochemical factors. Although from a nosological point of view, odontomas and supernumeraries are classified as distinct entities, they seem to be the expression of the same pathologic process, either malformative or hamartomatous.
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Affiliation(s)
- Roberto Pippi
- “Sapienza” University of Rome - Department of Odontostomatological and Maxillo Facial Sciences - Via Caserta 6, 00161 Rome - Italy
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The first missense mutation of NHS gene in a Tunisian family with clinical features of NHS syndrome including cardiac anomaly. Eur J Hum Genet 2011; 19:851-6. [PMID: 21559051 DOI: 10.1038/ejhg.2011.52] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
Nance-Horan Syndrome (NHS) or X-linked cataract-dental syndrome is a disease of unknown gene action mechanism, characterized by congenital cataract, dental anomalies, dysmorphic features and, in some cases, mental retardation. We performed linkage analysis in a Tunisian family with NHS in which affected males and obligate carrier female share a common haplotype in the Xp22.32-p11.21 region that contains the NHS gene. Direct sequencing of NHS coding exons and flanking intronic sequences allowed us to identify the first missense mutation (P551S) and a reported SNP-polymorphism (L1319F) in exon 6, a reported UTR-SNP (c.7422 C>T) and a novel one (c.8239 T>A) in exon 8. Both variations P551S and c.8239 T>A segregate with NHS phenotype in this family. Although truncations, frame-shift and copy number variants have been reported in this gene, no missense mutations have been found to segregate previously. This is the first report of a missense NHS mutation causing NHS phenotype (including cardiac defects). We hypothesize also that the non-reported UTR-SNP of the exon 8 (3'-UTR) is specific to the Tunisian population.
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Wang XP, Fan J. Molecular genetics of supernumerary tooth formation. Genesis 2011; 49:261-77. [PMID: 21309064 DOI: 10.1002/dvg.20715] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2010] [Revised: 01/02/2011] [Accepted: 01/06/2011] [Indexed: 01/07/2023]
Abstract
Despite advances in the knowledge of tooth morphogenesis and differentiation, relatively little is known about the aetiology and molecular mechanisms underlying supernumerary tooth formation. A small number of supernumerary teeth may be a common developmental dental anomaly, while multiple supernumerary teeth usually have a genetic component and they are sometimes thought to represent a partial third dentition in humans. Mice, which are commonly used for studying tooth development, only exhibit one dentition, with very few mouse models exhibiting supernumerary teeth similar to those in humans. Inactivation of Apc or forced activation of Wnt/β(catenin signalling results in multiple supernumerary tooth formation in both humans and in mice, but the key genes in these pathways are not very clear. Analysis of other model systems with continuous tooth replacement or secondary tooth formation, such as fish, snake, lizard, and ferret, is providing insights into the molecular and cellular mechanisms underlying succesional tooth development, and will assist in the studies on supernumerary tooth formation in humans. This information, together with the advances in stem cell biology and tissue engineering, will pave ways for the tooth regeneration and tooth bioengineering.
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Affiliation(s)
- Xiu-Ping Wang
- Department of Developmental Biology, Harvard School of Dental Medicine, Harvard University, Boston, Massachusetts 02115, USA.
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Durack C, Patel S. The use of cone beam computed tomography in the management of dens invaginatus affecting a strategic tooth in a patient affected by hypodontia: a case report. Int Endod J 2011; 44:474-83. [PMID: 21314830 DOI: 10.1111/j.1365-2591.2011.01866.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
AIM To report on the use of cone beam computed tomography (CBCT) in the diagnosis and management of dens invaginatus. SUMMARY Chronic apical periodontitis of an invaginated maxillary lateral incisor was diagnosed in a patient suffering from hypodontia and awaiting active orthodontic therapy. Loss of the tooth would have complicated orthodontic treatment. Conventional periapical radiographs provided insufficient information about the nature of the invagination and its relation to the root canal to formulate an appropriate plan for treating the tooth. A small volume CBCT scan of the tooth revealed that the invagination and the root canal were completely separate, non-communicating spaces and that the wall of the invagination acted as an obstruction to the effective chemomechanical debridement of the infected root canal. An innovative method of accessing the infected root canal, based on information from the CBCT images, was adapted to permit its instrumentation, disinfection and filling. KEY LEARNING POINTS • Teeth with dens invaginatus requiring endodontic treatment present diagnostic and technical challenges. • CBCT can provide essential information in the management of dens invaginatus.
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Affiliation(s)
- C Durack
- Department of Conservative Dentistry, Dental Institute, Kings College London, London, UK.
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Ding X, Patel M, Herzlich AA, Sieving PC, Chan CC. Ophthalmic pathology of Nance-Horan syndrome: case report and review of the literature. Ophthalmic Genet 2010; 30:127-35. [PMID: 19941417 DOI: 10.1080/13816810902822021] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
BACKGROUND Nance-Horan syndrome (NHS) is a rare X-linked disorder typified by dense congenital central cataracts, microcornea, anteverted and simplex pinnae, brachymetacarpalia, and numerous dental anomalies due in most cases to a mutation in the NHS gene. MATERIAL AND METHODS We present a case of clinical manifestation and ocular pathology in a patient with NHS. This article also reviews and discusses the relevant literature. RESULTS Classic and novel ocular pathological findings of a young male with NHS are described, including congenital cataracts, infantile glaucoma, scleral staphyloma, and severe retinal cystoid degeneration. CONCLUSIONS We report a new pathological finding of severe retinal cystoid degeneration in this NHS patient and confirm abnormal development of the anterior chamber angle structure. These findings, coupled with our analysis of the available NHS literature, provide new understanding of the histopathological basis of ocular abnormalities and vision loss in NHS.
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Affiliation(s)
- Xiaoyan Ding
- Immunopathology Section, Laboratory of Immunology, National Eye Institute, Bethesda, Maryland 20892-1857, USA
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Kirzioğlu Z, Ceyhan D. The prevalence of anterior teeth with dens invaginatus in the western Mediterranean region of Turkey. Int Endod J 2009; 42:727-34. [PMID: 19548935 DOI: 10.1111/j.1365-2591.2009.01579.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
AIM To assess the prevalence and type of dens invaginatus in anterior teeth of a selected population and to report associated dental complications. METHODOLOGY The records of patients examined in the Department of Paedodontics, Faculty of Dentistry, Süleyman Demirel University, Isparta, Turkey between 1999 and 2006 were screened and a total of 2477 patients who had complete records with satisfactory radiographs were selected. The type of dens invaginatus and the presence of apical pathosis was determined from radiographs. Other dental abnormalities, syndromes and systemic diseases were noted. Variations in crown shape were also recorded. RESULTS Dens invaginatus was detected in 300 out of 2477 patients, with a prevalence of 12%; 82% of affected patients had dens invaginatus bilaterally. Maxillary lateral incisors were the most affected teeth. The majority of the teeth had normal crown morphology (95%). The most commonly seen type of dens invaginatus was type I (94%). Overall 33% of the patients with type III dens invaginatus and 4% of the patients with type II dens invaginatus had apical pathosis. No associations with other systemic diseases and syndromes and some limited association with hypodontia and dens evaginatus were detected. CONCLUSION A careful oral examination, radiographs, a suitable treatment plan and follow-up programme are crucial for early diagnosis and treatment for teeth with dens invaginatus.
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Affiliation(s)
- Z Kirzioğlu
- Faculty of Dentistry, Department of Paedodontics, Süleyman Demirel University, Isparta, Turkey.
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Bishop K, Alani A. Dens invaginatus. Part 2: clinical, radiographic features and management options. Int Endod J 2008; 41:1137-54. [DOI: 10.1111/j.1365-2591.2008.01469.x] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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