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Hypodontia

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https://www.readbyqxmd.com/read/27895972/genetic-basis-of-nonsyndromic-and-syndromic-tooth-agenesis
#1
REVIEW
Xiaoqian Ye, Ali B Attaie
Human dentition development is a long and complex process which involves a series of reciprocal and sequential interactions between the embryonic stomodeal epithelium and the underlying neural crest-derived mesenchyme. Despite environment disturbances, tooth development is predominantly genetically controlled. To date, more than 200 genes have been identified in tooth development. These genes implied in various signaling pathways such as the bone morphogenetic protein, fibroblast growth factor, sonic hedgehog homolog, ectodysplasin A, wingless-type MMTV integration site family (Wnt), and transform growth factor pathways...
December 2016: Journal of Pediatric Genetics
https://www.readbyqxmd.com/read/27895346/association-between-hypodontia-and-angles-malocclusion
#2
Batool Ali, Syed Sheeraz Hussain
This study was planned to determine the prevalence of hypodontia in permanent dentition and to test whether an association was present between hypodontia and Angle's malocclusion. The retrospective study was conducted at a tertiary care hospital, Karachi, and comprised record of all patients visiting the orthodontic clinics of the hospital from 2005 to 2015. Orthodontic records of 790(79%) subjects, including 189(23.9%) males and 601(76.1%) females, were reviewed. Their mean age was 17 ± 5.06 years. A tooth was considered missing if no evidence of tooth germ was observed on orthopantomograms and dental casts...
October 2016: JPMA. the Journal of the Pakistan Medical Association
https://www.readbyqxmd.com/read/27874918/kooperation-von-kieferorthop%C3%A3-die-kieferchirurgie-und-prothetik-bei-der-umfassenden-rehabilitation-von-dysgnathiepatientinnen-teil-2-fallbeispiel-klasse-ii-malokklusion-tiefbiss-hypodontie
#3
Dagmar Schnabl, Martin Brock, Wolfgang Puelacher
Dental aplasia of heterogenous etiology may cause jaw growth disturbance, malocclusion, esthetic discontent and psychosocial impairment. By a case report of a young patient suffering from hypodontia, class II malocclusion and a deep bite the intricate interdisciplinary diagnosis- and treatment-protocol targeting the functional and esthetic rehabilitation is illustrated.
2016: Swiss Dental Journal
https://www.readbyqxmd.com/read/27860241/second-premolar-agenesis-as-a-subclinical-phenotype-of-isolated-cleft-palate
#4
J P Schwartz, R C M C Lauris, G Dalbén, D G Garib
OBJECTIVE: To compare the prevalence of dental anomalies in patients with isolated cleft palate with or without hypodontia of the second premolar. SETTING AND SAMPLE POPULATION: A total of 653 patients with isolated cleft palate aged 8-12 years were divided into two groups: G1-subjects without hypodontia of second premolar (n = 546) and G2-subjects with hypodontia of at least one-second premolar (n = 107). The control group consisted of 107 non-cleft orthodontic patients...
November 14, 2016: Orthodontics & Craniofacial Research
https://www.readbyqxmd.com/read/27812891/hypodontia-of-all-primary-canines
#5
R P Anthonappa, N M King
BACKGROUND: Several hypotheses have been proposed to explain hypodontia of the various tooth types with evolutionary and anatomic models. Hypodontia of all primary canines in a healthy individual is exceptionally rare and has not been previously reported in the dental literature. CASE REPORT: This clinical report describes a 4-year-old southern Chinese female with the congenital absence of the primary canines in all quadrants. Furthermore, all of the permanent tooth germs excluding the third molars were evident on a panoramic radiograph and were developing consistent with the subject's chronological age...
November 3, 2016: European Archives of Paediatric Dentistry: Official Journal of the European Academy of Paediatric Dentistry
https://www.readbyqxmd.com/read/27805878/evaluation-of-the-orthodontic-component-of-the-hypodontia-care-pathway
#6
Aliki Tsichlaki
No abstract text is available yet for this article.
December 2016: Journal of Orthodontics
https://www.readbyqxmd.com/read/27773763/development-of-a-measure-of-hypodontia-patients-expectations-of-the-process-and-outcome-of-combined-orthodontic-and-restorative-treatment
#7
Afnan Ben Gassem, Richard Foxton, Dirk Bister, Tim Newton
OBJECTIVES: To devise and assess the psychometric properties of a measure that investigates hypodontia patients' expectations of the process and outcome of combined orthodontic/restorative treatment. SETTING: Specialised secondary care facility for individuals with hypodontia. MATERIALS AND METHODS: Mixed research design with three phases: (a) Thematic analysis of data from individual interviews with 25 hypodontia patients/16 parents to generate the questionnaire items...
October 20, 2016: Journal of Dentistry
https://www.readbyqxmd.com/read/27767023/radiographic-study-of-the-prevalence-and-distribution-of-hypodontia-associated-with-unilateral-and-bilateral-clef-lip-and-palate-in-a-hungarian-population
#8
Ádám Berniczei-Roykó, Jan-Hendrik Tappe, Axel Krinner, Tomasz Gredes, András Végh, Katona Gábor, Kamila Linkowska-Świdzińska, Ute Ulrike Botzenhart
BACKGROUND Cleft defects are one of the most frequent birth-deformities of the orofacial region and they are commonly associated with anomalies of the tooth structure, size, shape, formation, eruption, and tooth number. The aim of our study was to evaluate the prevalence, distribution, and potential association of combined hypodontia in cleft-affected patients with regard to all types of teeth in both jaws in the permanent dentition. MATERIAL AND METHODS This retrospective radiographic analysis included patients with various types of clefts treated orthodontically in the Department of Orofacial Orthopedics and Orthodontics at Heim Pàl Children's Hospital, Budapest...
October 21, 2016: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/27736875/mutations-in-tspear-encoding-a-regulator-of-notch-signaling-affect-tooth-and-hair-follicle-morphogenesis
#9
Alon Peled, Ofer Sarig, Liat Samuelov, Marta Bertolini, Limor Ziv, Daphna Weissglas-Volkov, Marina Eskin-Schwartz, Christopher A Adase, Natalia Malchin, Ron Bochner, Gilad Fainberg, Ilan Goldberg, Koji Sugawara, Avital Baniel, Daisuke Tsuruta, Chen Luxenburg, Noam Adir, Olivier Duverger, Maria Morasso, Stavit Shalev, Richard L Gallo, Noam Shomron, Ralf Paus, Eli Sprecher
Despite recent advances in our understanding of the pathogenesis of ectodermal dysplasias (EDs), the molecular basis of many of these disorders remains unknown. In the present study, we aimed at elucidating the genetic basis of a new form of ED featuring facial dysmorphism, scalp hypotrichosis and hypodontia. Using whole exome sequencing, we identified 2 frameshift and 2 missense mutations in TSPEAR segregating with the disease phenotype in 3 families. TSPEAR encodes the thrombospondin-type laminin G domain and EAR repeats (TSPEAR) protein, whose function is poorly understood...
October 2016: PLoS Genetics
https://www.readbyqxmd.com/read/27733874/prevalence-of-dental-anomalies-in-permanent-dentition-of-brazilian-individuals-with-down-syndrome
#10
Osmar Aparecido Cuoghi, Francielle Topolski, Lorraine Perciliano de Faria, Carla Machado Occhiena, Nancy Dos Santos Pinto Ferreira, Camila Ribeiro Ferlin, Marcos Rogério de Mendonça
OBJECTIVE: The aim of this study was to evaluate the incidence of dental anomalies in the permanent dentition of individuals with Down Syndrome (DS) to increase the knowledge on the dental issues in this syndrome. METHOD: One hundred and five panoramic X-rays of patients with DS (61 males and 44 females), aged 7 to 42 years were used. The data were statistically analyzed using bivariate analyses test (p <0.05). RESULTS: Dental anomalies were observed in 50...
2016: Open Dentistry Journal
https://www.readbyqxmd.com/read/27730036/christ-siemens-touraine-syndrome-with-palmoplantar-keratoderma-a-rare-association
#11
Sunil K Kothiwala, Mahesh Prajapat, C M Kuldeep
Christ-Siemens-Touraine syndrome is a form of anhidrotic ectodermal dysplasia (ED) characterized by triad of hypodontia, hypotrichosis, and hypohidrosis. Palmoplantar keratoderma is a characteristic feature of hidrotic forms of ED. Till date, only two cases have been reported of Christ-Siemens-Touraine syndrome with palmoplantar keratoderma; here we report a similar case emphasizing this rare association.
September 2016: Indian Dermatology Online Journal
https://www.readbyqxmd.com/read/27702401/evaluation-of-the-orthodontic-component-of-the-hypodontia-care-pathway
#12
M O'Keeffe, J M Collins, S J Cunningham
INTRODUCTION: This study evaluated patients' experiences of the Hypodontia Care Pathway at a large teaching hospital at key stages: specifically patient expectations/experience following the diagnosis of hypodontia and then patient satisfaction with the orthodontic care received and the outcome at the end of active orthodontic treatment. METHODOLOGY: In-depth, semi-structured interviews were conducted with 20 hypodontia patients following completion of orthodontic treatment but prior to any planned prosthodontic treatment commencing...
October 5, 2016: Journal of Orthodontics
https://www.readbyqxmd.com/read/27692419/tooth-replacements-in-young-adults-with-severe-hypodontia-orthodontic-space-closure-dental-implants-and-tooth-supported-fixed-dental-prostheses-a-follow-up-study
#13
Christina L Hvaring, Bjørn Øgaard, Kari Birkeland
INTRODUCTION: Children with severe hypodontia have a substantial impairment of their dental health starting early in life. The purpose of this study was to describe types and locations of substitutes for missing teeth in patients with severe hypodontia and to compare the crown and soft tissue morphologies of orthodontic space closure, dental implants, and tooth-supported fixed dental prostheses for replacing teeth in the anterior region. METHODS: Fifty patients missing 6 or more teeth and aged 18 years or older (mean age, 25...
October 2016: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/27692418/craniofacial-characteristics-of-children-with-mild-hypodontia
#14
Strahinja Vucic, Brunilda Dhamo, Mette A R Kuijpers, Vincent W V Jaddoe, Albert Hofman, Eppo B Wolvius, Edwin M Ongkosuwito
INTRODUCTION: The aim of our study was to evaluate the craniofacial characteristics of children with mild hypodontia using conventional and principal component (PC) analysis. METHODS: We used radiographic images of 124 children (8-12 years old) with up to 4 missing teeth (55 boys, 69 girls) and of 676 reference children (365 boys, 311 girls) from the Rotterdam Generation R Study and the Nijmegen Growth Study in The Netherlands. Fifteen cephalometric measurements of children with hypodontia were compared with those of the reference children...
October 2016: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/27689858/long-term-effect-of-chemotherapy-intensity-modulated-radiation-therapy-chemo-imrt-on-dentofacial-development-in-head-and-neck-rhabdomyosarcoma-patients
#15
Adepitan A Owosho, Paul Brady, Suzanne L Wolden, Leonard H Wexler, Cristina R Antonescu, Joseph M Huryn, Cherry L Estilo
Dentofacial developmental abnormalities have been reported in head and neck rhabdomyosarcoma (HNRMS) patients treated with conventional radiotherapy technique and chemotherapy. This current study investigates dentofacial long-term effects among HNRMS survivors managed with intensity-modulated radiotherapy (IMRT) and chemotherapy. In general, IMRT is a more effective 3D-conformal radiotherapy technique, which delivers high doses of radiation to the tumor target while minimizing doses received by the surrounding normal tissues...
September 2016: Pediatric Hematology and Oncology
https://www.readbyqxmd.com/read/27688427/prevalence-and-pattern-of-non-syndromic-hypodontia-in-a-group-of-turkish-children
#16
Berna Gokkaya, Betul Kargul
OBJECTIVE: The aim of this study was to assess the prevalence and pattern of congenital missing teeth in the permanent dentition (excluding wisdom teeth), among Turkish children in a 4-year period (2009-2012). METHODS: The study group comprised 1658 children (873 girls, 785 boys). The children were examined in Department of Pediatric Dentistry, Dental School of Marmara University. A chi square test was used to determine the difference in the prevalence of hypodontia between genders...
March 2016: Acta Stomatologica Croatica
https://www.readbyqxmd.com/read/27665865/mutation-analysis-by-direct-and-whole-exome-sequencing-in-familial-and-sporadic-tooth-agenesis
#17
Alessandro Salvi, Edoardo Giacopuzzi, Elena Bardellini, Francesca Amadori, Lia Ferrari, Giuseppina De Petro, Giuseppe Borsani, Alessandra Majorana
Dental agenesis is one of the most common congenital craniofacial abnormalities. Dental agenesis can be classified, relative to the number of missing teeth (excluding third molars), as hypodontia (1 to 5 missing teeth), oligodontia (6 or more missing teeth), or anodontia (lack of all teeth). Tooth agenesis may occur either in association with genetic syndromes, based on the presence of other inherited abnormalities, or as a non-syndromic trait, with both familiar and sporadic cases reported. In this study, we enrolled 16 individuals affected by tooth agenesis, prevalently hypodontia, and we carried out direct Sanger sequencing of paired box 9 (PAX9) and Msh homeobox 1 (MSX1) genes in 9 subjects...
September 19, 2016: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/27659091/trauma-due-to-self-aggression-in-patient-with-waardenburg-syndrome-associated-with-congenital-anomalies
#18
Sara Nader Marta, Roberto Yoshio Kawakami, Claudia Almeida Prado Piccino Sgavioli, Ana Eliza Correa, Guaniara D'Árk de Oliveira El Kadre, Ricardo Sandri Carvalho
Waardenburg syndrome (WS) is an inherited autosomal dominant genetic disorder presenting variable penetrance and expressivity, with an estimated prevalence of 1:42,000. Clinical characteristics of WS include lateral displacement of the internal eye canthus, hyperplasia of the medial portion of the eyebrows, prominent and broad nasal base, congenital deafness, pigmentation of the iris and skin, and white forelock. A 24-year-old male patient, previously diagnosed with WS, was referred to the Special Needs Dental Clinic of Sacred Heart University, Bauru, Brazil...
2016: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/27612211/neonatal-progeriod-syndrome-associated-with-biallelic-truncating-variants-in-polr3a
#19
Allison M Jay, Robert L Conway, Isabelle Thiffault, Carol Saunders, Emily Farrow, John Adams, Helga V Toriello
Wiedemann-Rautenstrauch syndrome, also known as neonatal progeroid syndrome, is a rare condition with fewer than 40 patients reported in the literature. Characteristic physical findings include neonatal progeroid appearance, sparse scalp hair, prominent scalp veins, and lipoatrophy; in addition, neonatal teeth are often a distinctive finding. The inheritance pattern of this disorder has been postulated to be autosomal recessive, although a specific gene has not been identified. Here we report an infant with the characteristic phenotypic features of Wiedemann-Rautenstrauch syndrome in whom exome sequencing identified two pathogenic variants in POLR3A: c...
September 9, 2016: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/27602401/langer-giedion-syndrome-a-rare-case-report
#20
Farhin Ali Katge, Bhavesh Dahyabhai Rusawat, Pooja Ravindra Shivasharan, Devendra Pandurang Patil
Langer-Giedion syndrome is a very uncommon autosomal dominant genetic disorder caused by the deletion of chromosomal material. It is characterized by multiple bony exostosis, short stature, mental retardation, and typical facial features. The characteristic appearance of individuals includes sparse scalp hair, rounded nose, prominent philtral area and thin upper lip. Some cases with this condition have loose skin in childhood which typically resolves with age. Oral and dental manifestations include micrognathia, retrognathia, hypodontia, and malocclusion based on cephalometric analysis...
September 2016: Journal of Dentistry
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