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Hypodontia

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https://www.readbyqxmd.com/read/29429779/ataxia-with-hypodontia-a-unique-leukodystrophy
#1
Amanda D Currie, Swati A Karmarkar
No abstract text is available yet for this article.
December 27, 2017: Pediatric Neurology
https://www.readbyqxmd.com/read/29407495/identification-and-appraisal-of-outcome-measures-used-to-evaluate-hypodontia-care-a-systematic-review
#2
REVIEW
Sophy Barber, Hilary L Bekker, David Meads, Sue Pavitt, Balvinder Khambay
INTRODUCTION: Identification and appraisal of the outcome measures that have been used to evaluate hypodontia treatment and deliver services are essential for improving care. A lack of alignment between outcomes and patient values can limit the scope for patient-centered care. Our objectives were to identify and appraise the outcomes selected to evaluate hypodontia care. METHODS: Data sources included 10 electronic databases and grey literature, searched using terms for hypodontia and its treatment methods...
February 2018: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/29388416/teeth-agenesis-evaluation-in-an-italian-sample-of-complete-unilateral-and-bilateral-cleft-lip-and-palate-patients
#3
Alberto DE Stefani, Giovanni Bruno, Paolo Balasso, Sergio Mazzoleni, Ugo Baciliero, Antonio Gracco
BACKGROUND: The aim of this study is to evaluate the prevalence and the distribution of teeth agenesis inside and outside the cleft area in an Italian population with a non-syndromic unilateral (UCLP) and bilateral (BCLP) cleft lip and palate. METHODS: 233 digital panoramic radiographs (151 females, 82 males) of patients between seven and fifteen years old were recruited from the maxillo-facial surgery clinic of the San Bortolo Hospital of Vicenza according with the following inclusion criteria: unilateral or bilateral cleft lip and palate, no other syndroms, no previous orthodontic treatment, no previous teeth extractions and good quality of digital panoramic radiographs...
January 31, 2018: Minerva Stomatologica
https://www.readbyqxmd.com/read/29380250/pre-maxillary-hypohyperdontia-a-report-of-two-cases
#4
L M Bowdin, S Wong, R P Anthonappa, N M King
BACKGROUND: Hypodontia and hyperdontia are considered to be at opposite ends of the dental development spectrum. Nevertheless, these anomalies may occur concomitantly (hypohyperdontia). CASE REPORT: This clinical report describes two case of hypohyperdontia occurring exclusively in the premaxillary region, and the difficulties associated with its diagnosis and management. Following 24 months of follow-up examinations, Case 1 developed a sequential supernumerary tooth in the tooth 35 region...
January 29, 2018: European Archives of Paediatric Dentistry: Official Journal of the European Academy of Paediatric Dentistry
https://www.readbyqxmd.com/read/29364501/wnt10b-mutations-associated-with-isolated-dental-anomalies
#5
P N Kantaputra, A Hutsadaloi, M Kaewgahya, W Intachai, R German, M Koparal, C Leethanakul, A Tolun, J R Ketudat Cairns
Isolated hypodontia is the most common human malformation. It is caused by heterozygous variants in various genes, with heterozygous WNT10A variants being the most common cause. WNT10A and WNT10B are paralogs that likely evolved from a common ancestral gene after its duplication. Recently an association of WNT10B variants with oligodontia (severe tooth agenesis) has been reported. We performed mutational analysis in our cohort of 256 unrelated Thai families with various kinds of isolated dental anomalies. In seven families afflicted with dental anomalies we detected four heterozygous missense variants in WNT10B...
January 24, 2018: Clinical Genetics
https://www.readbyqxmd.com/read/29336932/orthognathic-surgery-in-melnick-needles-syndrome-a-review-of-the-literature-and-report-of-two-siblings
#6
REVIEW
J E O'Connell, B Bourke, G J Kearns
Melnick-Needles syndrome (MNS) is a rare congenital X-linked dominant skeletal dysplasia, characterized by exophthalmos, a prominent forehead, and mandibular hypoplasia and retrognathism. Dental features may include anodontia, hypodontia, or oligodontia. Increased collagen content, unpredictable collagen synthesis, and abnormal bony architecture have raised concerns regarding bone splitting intraoperatively and bone healing postoperatively. This report describes the cases of two sisters with MNS, who successfully underwent orthognathic surgery consisting of bilateral mandibular ramus osteotomies combined with advancement genioplasty and iliac crest bone grafting, to correct the classical MNS facial deformity of mandibular retrognathia...
January 11, 2018: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29316063/bilirubin-reversibly-affects-cell-death-and-odontogenic-capacity-in-shed
#7
Haruyoshi Yamaza, Erika Tomoda, Soichiro Sonoda, Kazuaki Nonaka, Toshio Kukita, Takayoshi Yamaza
OBJECTIVE: Hyperbilirubinemia in patients with biliary atresia causes deciduous tooth injuries such as green pigmentation and dentin hypoplasia. In patients with biliary atresia who received liver transplantation, tooth structure appears to be recovered radiographically. Nevertheless, little is known about cellular mechanisms underlying bilirubin-induced damage and suppression of deciduous tooth formation. In this study, we examined the effects of bilirubin in stem cells from human exfoliated deciduous teeth (SHED) in vitro...
January 9, 2018: Oral Diseases
https://www.readbyqxmd.com/read/29275100/metabolic-and-vascular-pattern-in-medial-pterygoid-muscle-is-altered-by-chronic-stress-in-an-animal-model-of-hypodontia
#8
Rodrigo Alberto Restrepo Fernández, Yamba Carla Lara Pereira, Daniela Mizusaki Iyomasa, Ricardo Alexandre Calzzani, Christie Ramos Andrade Leite-Panissi, Mamie Mizusaki Iyomasa, Glauce Crivelaro Nascimento
Psychological stress is an important perpetuating, worsening and risk factor for temporomandibular disorders of muscular or articular origin. Occlusion instability, by the way, is considered a risk factor of this pathology and can be reproduced in some experimental animal models. The exact physiologic mechanism underlying these relations however, remains unclear. Our purpose was to test the hypothesis that chronic stress and unilateral exodontia induce metabolic and vascular changes in the medial pterygoid muscle of rats...
December 21, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/29229899/phenotypic-variation-in-patients-with-homozygous-c-1678g-t-mutation-in-evc-gene-report-of-two-mexican-families-with-ellis-van-creveld-syndrome
#9
Marisol Ibarra-Ramirez, Luis Daniel Campos-Acevedo, Jose Lugo-Trampe, Laura E Martínez-Garza, Víctor Martinez-Glez, María Valencia-Benitez, Pablo Lapunzina, Víctor Ruiz-Peréz
BACKGROUND Ellis-van Creveld syndrome is an autosomal recessive chondro-ectodermal dysplasia characterized by disproportionate short stature, limb shortening, narrow chest, postaxial polydactyly and dysplastic nails and teeth. In addition, 60% of cases present congenital heart defects. Ellis-van Creveld syndrome is predominantly caused by mutations in the EVC or EVC2 (4p16) genes, with only a few cases caused by mutations in WDR35.  CASE REPORT Here, we report on two Mexican families with patients diagnosed with Ellis-van Creveld syndrome...
December 12, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/29178640/expanding-the-mutational-spectrum-in-johanson-blizzard-syndrome-identification-of-whole-exon-deletions-and-duplications-in-the-ubr1-gene-by-multiplex-ligation-dependent-probe-amplification-analysis
#10
Maja Sukalo, Eva Schäflein, Ina Schanze, David B Everman, Nima Rezaei, Jesús Argente, Isabel Lorda-Sanchez, Charu Deshpande, Tsutomu Takahashi, Alexander Kleger, Martin Zenker
BACKGROUND: Johanson-Blizzard syndrome (JBS, MIM #243800) is a very rare autosomal recessive disorder characterized by exocrine pancreatic insufficiency, nasal wing hypoplasia, hypodontia, and other abnormalities. JBS is caused by mutations of the UBR1 gene (MIM *605981), encoding a ubiquitin ligase of the N-end rule pathway. METHODS: Molecular findings in a total of 65 unrelated patients with a clinical diagnosis of JBS who were previously screened for UBR1 mutations by Sanger sequencing were reviewed and cases lacking a disease-causing UBR1 mutation on either one or both alleles were included in this study...
November 2017: Molecular Genetics & Genomic Medicine
https://www.readbyqxmd.com/read/29167708/tooth-abnormalities-in-individuals-with-unilateral-alveolar-clefts-a-comparison-between-sides-using-cone-beam-computed-tomography
#11
Bruno-Torres Bezerra, John-Nadson-Andrade Pinho, Luiz-Carlos-Ferreira da Silva
Background: Tooth abnormalities are most often present in individuals with oral clefts than general population, and lead to a long-term impact on facial anatomy and self-esteem. The purpose of this study was to compare the proportion of dental anomalies between the cleft side and non-cleft side in individuals with non-syndromic unilateral alveolar clefts (AC). Material and Methods: Twenty cone beam computed tomography (CBCT) scans were converted into three-dimensional (3D) virtual models...
October 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/29147600/osteoglophonic-dysplasia-phenotypic-and-radiological-clues
#12
Shwetha Kuthiroly, Dhanya Yesodharan, Aneesh Ghosh, Kenneth E White, Sheela Nampoothiri
Osteoglophonic dysplasia (OD) is an extremely rare, skeletal dysplasia with an autosomal dominant mode of inheritance. Rhizomelic dwarfism, craniosynostosis, impacted teeth, hypodontia or anodontia, and multiple nonossifying bone lesions are the salient features of this condition. We report a 14-year-old girl with clinical and radiological features consistent with OD. She presented with disproportionate short stature, craniosynostosis, a prominent supraorbital ridge, delayed teeth eruption, hypodontia, and multiple nonossifying bone lesions in the femur, tibia, and fibula...
December 2017: Journal of Pediatric Genetics
https://www.readbyqxmd.com/read/29080079/obeservations-on-association-between-third-molar-agenesis-and-craniofacial-morphology
#13
Yi Huang, Yinqiu Yan, Jing Cao, Bingjie Xie, Xueling Xiao, Mengqi Luo, Ding Bai, Xianglong Han
OBJECTIVE: This study was designed to examine the relationship between third molar agenesis and skeletal morphology in the Chinese population. MATERIALS AND METHODS: A total of 1043 patients' records were analyzed with panoramic radiographs and cephalograms. Congenitally missing third molars were assessed with respect to gender, jaw, and side, and assessed in various types of facial morphology. Linear, angular, and proportional cephalometric measurements were analyzed and compared among the samples...
November 2017: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
https://www.readbyqxmd.com/read/29064544/width-of-dental-arches-in-patients-with-maxillary-midline-diastema
#14
Anna Sękowska, Renata Chałas, Izabella Dunin-Wilczyńska
AIM: The aims of the study were following: 1. Examine the width of the dental arches of patients with maxillary midline diastema and comparison with control group. 2. Investigate the impact of the width of upper dental arch to the width of diastema. MATERIAL AND METHODS: Diagnostic orthodontic plaster models of 102 patients with permanent dentition were studied. Patients were divided into two groups: study group with diastema and control group without diastema. Patients with severe malocclusion, craniofacial diseases, hypodontia and mikrodontia of teeth and patients with periodontal disease were excluded...
October 24, 2017: Folia Morphologica (Warsz)
https://www.readbyqxmd.com/read/29034420/prevalence-of-dental-agenesis-in-a-sample-of-italian-orthodontic-patients-an-epidemiological-study
#15
Antonio L T Gracco, Serena Zanatta, Filippo Forin Valvecchi, Denis Bignotti, Alessandro Perri, Francesco Baciliero
BACKGROUND: The congenital absence of one or more teeth is a dental anomaly that frequently occurs in the world's population with a wide variability of distribution. The aim of this study is to assess the current prevalence of dental agenesis in the permanent dentition (excluding third molars) using a sample of Italian orthodontic patients. METHODS: Panoramic radiographs of 4006 Caucasian children between 9 and 16 years of age (1865 males and 2141 females) performed over a 5-year period (from 2010 to 2015) were carefully examined to identify congenital missing teeth...
October 16, 2017: Progress in Orthodontics
https://www.readbyqxmd.com/read/29034274/prevalence-and-characteristics-of-developmental-dental-anomalies-in-iranian-orofacial-cleft-patients
#16
Shabnam Ajami, Hamidreza Pakshir, Hedyeh Samady
STATEMENT OF THE PROBLEM: Individuals with oral clefts exhibit considerably more dental anomalies than individuals without clefts. These problems could initially be among the symptoms of their disease and/or they may be the side effect of their treatments. Pushback palatoplasty could cause some interference during the development of teeth and result in tooth defects. PURPOSE: The study was performed to assess the prevalence and characteristics of developmental dental anomalies in orofacial cleft patients who attended Shiraz Orthodontics Research Center-Cleft Lip and Palate Clinic...
September 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/29016739/association-between-severity-of-hypodontia-and-cephalometric-skeletal-patterns-a-retrospective-study
#17
Waleed Taju, Martyn Sherriff, Dirk Bister, Sophia Shah
Objective: To assess if severity of hypodontia is related to a specific skeletal pattern. Study design: Lateral cephalometric radiographs and dental panoramic tomographs of 182 hypodontia patients were analysed. The severity of hypodontia was recorded and the sample was divided into groups with mild (n = 71), moderate (n = 56) and severe (n = 55) hypodontia. According to ethnicity, the sample was further subdivided into White Caucasians, African-British, and Arabian/Indian subgroups...
July 11, 2017: European Journal of Orthodontics
https://www.readbyqxmd.com/read/28992378/grem2-nucleotide-variants-and-the-risk-of-tooth-agenesis
#18
Adrianna Mostowska, Barbara Biedziak, Małgorzata Zadurska, Agnieszka Bogdanowicz, Aneta Olszewska, Katarzyna Cieślińska, Ewa Firlej, Paweł P Jagodziński
OBJECTIVE: The etiology of tooth agenesis is multifactorial and still not fully understood. The aim of the study was to test whether variants of GREM2, encoding a BMP antagonist, are associated with the risk of this common dental anomaly in a Polish population. SUBJECTS AND METHODS: Direct sequencing of the GREM2 coding sequence including exon/intron boundaries was performed in 95 patients with both hypodontia and oligodontia. All identified GREM2 variants were then further tested in an independent group of patients (n=163) and controls (n=184)...
October 9, 2017: Oral Diseases
https://www.readbyqxmd.com/read/28933802/invesigation-of-prevalence-of-dental-anomalies-by-using-digital-panoramic-radiographs
#19
Nebiha Hilal Bilge, Selin Yeşiltepe, Kübra Törenek Ağırman, Fatma Çağlayan, Osman Murat Bilge
BACKGROUND: This study was performed to evaluate the prevalence of all types and subtypes of dental anomalies among 6 to 40 year-old patients by using panoramic radiographs. MATERIALS AND METHODS: This cross-sectional study was conducted by analyzing digital panoramic radiographs of 1200 patients admitted to our clinic in 2014. Dental anomalies were examined under 5 types and 16 subtypes. Dental anomalies were divided into five types: (a) number (including hypodontia, oligodontia and hyperdontia); (b) size (including microdontia and macrodontia); (c) structure (including amelogenesis imperfecta, dentinogenesis imperfecta and dentin dysplasia); (d) position (including transposition, ectopia, displacement, impaction and inversion); (e) shape (including fusion-gemination, dilaceration and taurodontism); RESULTS: The prevalence of dental anomalies diagnosed by panoramic radiographs was 39...
September 21, 2017: Folia Morphologica (Warsz)
https://www.readbyqxmd.com/read/28917830/al-awadi-raas-rothschild-syndrome-with-dental-anomalies-and-a-novel-wnt7a-mutation
#20
Piranit Nik Kantaputra, Seema Kapoor, Prashant Verma, Massupa Kaewgahya, Katsushige Kawasaki, Atsushi Ohazama, James R Ketudat Cairns
Al-Awadi-Raas-Rothschild syndrome (AARRS; OMIM 276820) is a very rare autosomal recessive limb malformation syndrome caused by WNT7A mutations. AARRS is characterized by various degrees of limb aplasia and hypoplasia. Normal intelligence and malformations of urogenital system are frequent findings. Complete loss of WNT7A function has been shown to cause AARRS, however, its partial loss leads to the milder malformation, Fuhrmann syndrome. An Indian boy affected with AARRS is reported. A novel homozygous base substitution mutation c...
September 14, 2017: European Journal of Medical Genetics
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