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Prevalence and etiology of linear enamel hypoplasia in monkeys and apes from Asia and Africa

Guatelli-Steinberg D, Skinner M

Folia Primatol., 2000 May-Jun;71(3):115-32.
PMID: 10828689

Ninety-seven specimens of sympatric monkeys and apes from East Malaysia and 115 monkeys and apes from West Africa are examined in order to evaluate the magnitude and nature of the great ape-monkey linear enamel hypoplasia (LEH) 'dichotomy'. This study demonstrates that great apes from both regions have a higher incidence of LEH and repetitive LEH than do gibbons and monkeys. However, the authors find that the dichotomy is not as clear-cut as previous research suggests, since some monkey samples exhibit high LEH frequencies. The authors evaluate the potential influence of great ape-monkey differences in crown height on this dichotomy. They show that canine crown height variation is weakly associated with LEH variation. Differences between monkeys and great apes in their crown formation spans and in their experience of environmental stress may be more likely causes of the dichotomy.

Matched MeSH terms: Dental Enamel Hypoplasia/epidemiology; Dental Enamel Hypoplasia/veterinary*
Esthetic perception and psychosocial impact of developmental enamel defects among Malaysian adolescents

Sujak SL, Abdul Kadir R, Dom TN

J Oral Sci, 2004 Dec;46(4):221-6.
PMID: 15901066

The aim of this study was to investigate the prevalence and psychosocial impact of enamel defects among 16-year-old school children on the island of Penang. The data were collected through a self-administered questionnaire survey and an oral examination, using the Modified Developmental Defects of Enamel Index (FDI, 1992). In all, 1024 subjects were selected using a multistage random sampling technique. About two-thirds of the sample (67.1%) had at least one tooth affected by enamel defects. Enamel opacities accounted for 85.6% of the total condition. Diffuse-type opacity predominated (63.5%). Among subjects who expressed dissatisfaction, 18.8% reported covering their mouths when smiling, 8.7% avoided going out with friends and 39.1% had consulted their dentists. About 17% of the subjects reported that their parents had complained about the color of their front teeth but only 5.7% had experienced being teased by their friends about the problem. Two-thirds of the subjects were affected by enamel defects involving at least one tooth; however, the esthetic perception and psychosocial impact of those affected were minor.

Matched MeSH terms: Dental Enamel Hypoplasia/diagnosis; Dental Enamel Hypoplasia/epidemiology; Dental Enamel Hypoplasia/psychology*
Distribution of Molar Incisor Hypomineralization in Malaysian Children Attending University Dental Clinic

Hussein AS, Faisal M, Haron M, Ghanim AM, Abu-Hassan MI

J Clin Pediatr Dent, 2015;39(3):219-23.
PMID: 26208065 DOI: 10.17796/1053-4628-39.3.219

Molar-Incisor Hypomineralization (MIH) is a condition of hypomineralized enamel of systemic origin affecting first permanent molars and frequently permanent incisors. It is considered a global problem and data from South-East Asian countries, including Malaysia are lacking. Hence the aim of this study were to investigate the distribution and severity of MIH in a group of children aged 7-12 year olds attending pediatric dental clinic at Faculty of Dentistry, Universiti Teknologi MARA (UiTM), Malaysia.

Matched MeSH terms: Dental Enamel Hypoplasia/classification; Dental Enamel Hypoplasia/epidemiology*
Molar incisor hypomineralisation: current knowledge and practice

Rodd HD, Graham A, Tajmehr N, Timms L, Hasmun N

Int Dent J, 2020 Oct 08.
PMID: 33031573 DOI: 10.1111/idj.12624

BACKGROUND: Molar incisor hypomineralisation (MIH) is a common developmental dental condition that presents in childhood. Areas of poorly formed enamel affect one or more first permanent molars and can cause opacities on the anterior teeth. MIH presents a variety of challenges for the dental team as well as functional and social impacts for affected children.
OBJECTIVES: Here, we provide an up-to-date review of the epidemiology, aetiology, diagnosis and clinical management of MIH.
MATERIALS AND METHODS: A review of the contemporary basic science and clinical literature, relating to MIH, was undertaken using information obtained (up to 10 April 2020) from the electronic databases PubMed, Scopus, Web of Science and the Cochrane Library.
RESULTS: There is a growing body of evidence relating to the aetiology, presentation and clinical management of MIH. Current knowledge appears to be focused on potential genetic aspects, as well as the development and validation of indices for the diagnosis and management of MIH. There has also been increasing recognition of the global and individual burden of this common condition.
CONCLUSIONS: Dental health professionals should regularly appraise the basic science and clinical MIH literature to ensure that they provide the best possible short- and long-term care for their young patients.

Matched MeSH terms: Dental Enamel Hypoplasia
Fulltext Dental rehabilitation of amelogenesis imperfecta using thermoformed templates

Sockalingam S

J Indian Soc Pedod Prev Dent, 2011 Jan-Mar;29(1):53-6.
PMID: 21521920 DOI: 10.4103/0970-4388.79938

Amelogenesis imperfecta represents a group of dental developmental conditions that are genomic in origin. Hypoplastic AI, hypomineralised AI or both in combination were the most common types seen clinically. This paper describes oral rehabilitation of a 9-year-old Malay girl with inherited hypoplastic AI using transparent thermoforming templates. The defective surface areas were reconstructed to their original dimensions on stone cast models of the upper and lower arches using composite, and transparent thermoform templates were fabricated on the models. The templates were used as crown formers to reconstruct the defective teeth clinically using esthetically matching composite. The usage of the templates allowed direct light curing of the composite, accurate reproducibility of the anatomic contours of the defective teeth, reduced chair-side time and easy contouring and placement of homogenous thickness of composite in otherwise inaccessible sites of the affected teeth.

Matched MeSH terms: Dental Enamel Hypoplasia/rehabilitation
Oral health status of 16-year-old school children in Malaysia

Nik-Hussein NN, Abdul Muttalib K, Junid NZ, Wan MN, Abang A

Singapore Dent J, 2004 Dec;26(1):30-8.
PMID: 15736839

The aim of the present study was to determine the oral health status of 16-year-old Malaysian school children. The prevalence of caries was 75.5%. More than 60% of subjects had caries experience by teeth (DMFT) scores of 0-3. The largest component of the DMFT and caries experience by surface index was the filled component. Females had higher caries prevalence and caries scores than males. The mouth and tooth prevalences of enamel defects were 56% and 21.8%, respectively. The most common type of enamel defects observed were diffuse opacities, affecting 95.5% of affected subjects and 92.1% of affected teeth. One-third of subjects had healthy gingival conditions, 8.6% had bleeding gingivae, 55.1% had calculus and 3% had pockets. Less than 1% of subjects wore or required dentures. Cleft lip and/or palate was uncommon. This study shows that the prevalence of caries and DMFT scores have declined over the last 30 years.

Matched MeSH terms: Dental Enamel Hypoplasia/epidemiology
The prevalence of enamel opacities in permanent teeth of 11-12 year-old school children in Kuala Lumpur, Malaysia

Yusoff N, Jaafar N, Razak IA, Chew YY, Ismail N, Bulgiba AM

Community Dent Health, 2008 Mar;25(1):55-8.
PMID: 18435236

To determine the prevalence, distribution, severity and treatment need of enamel opacities among 11-12 year-old school children in a fluoridated urban community.

Matched MeSH terms: Dental Enamel Hypoplasia/ethnology; Dental Enamel Hypoplasia/epidemiology
Fulltext Dental anomalies and their treatment modalities/planning in orthodontic patients

Roslan AA, Rahman NA, Alam MK

J Orthod Sci, 2018;7:16.
PMID: 30271761 DOI: 10.4103/jos.JOS_37_18

OBJECTIVE: This study was carried to study the prevalence of dental anomalies and treatment modalities/planning among the orthodontic patients.
MATERIALS AND METHODS: A total of 370 orthodontic records including their pre-treatment orthopantomographs (OPG) and study models of orthodontic patients in permanent dentition who attended dental clinic were assessed for impaction, hypodontia, supernumerary, supraocclusion, infraocclusion, and any other anomalies excluding the third molars. The association of anomalies with gender status and racial status was analyzed using Pearson's Chi-square test. A P value of <0.05 is considered as significant. The confidence interval at 95% (CI) was set.
RESULTS: Among the 370 subjects, 105 (28.4%) presented with at least one anomaly. Eighty-five (23%) demonstrated a single anomaly and 20 (5.4%) with more than one anomaly. The most prevalent anomaly was impaction (14.32%), followed by hypodontia (7.03%). The less common anomalies were microdontia (1.08%), dilacerations (0.27%), and generalised enamel hypoplasia (0.27%). Maxillary right lateral incisors and canines were the most common affected teeth and these are located on the maxillary right quadrant. It was evident that dental anomalies were statistically dependant on race (P = 0.025), but independent of gender. The most common treatment planned for these patients was fixed appliance.
CONCLUSIONS: Impaction was predominant among 28.4% subjects observed with anomaly and most patients with anomaly are treated with fixed appliances (49%).
CLINICAL RELEVANCE: These anomalies play a great role in occlusion and alignment in treatment planning and relapse for orthodontic treatment.

Matched MeSH terms: Dental Enamel Hypoplasia
Amelogenesis imperfecta: enamel ultra structure and molecular studies

Gopinath VK, Al-Salihi KA, Yean CY, Ann MC, Ravichandran M

J Clin Pediatr Dent, 2004;28(4):319-22.
PMID: 15366620

Amelogenesis imperfecta (AI) is a hereditary disorder resulting in generalized defects in the enamel. The case reported here is of a seven-year-old male child with yellow color of all his teeth. Two of his primary molars were extracted due to dental abscess with advanced root resorption. Histologically hypoplastic enamel layer, positively birefringent, generalized pitting, roughness with irregular general cracked borders were observed. Scanning electron microscope, revealed extensive irregular, disorganized rough superficial enamel layer. The enamel was irregularly decussate with filamentous prisms accompanied by small rounded formations. The morphological and histological examination of the tooth revealed that this patient has the features of AI. For genetic study blood sample were collected from the patient and PCR analysis revealed that there is no mutation in exons 1-7 of AMELX gene on the X chromosome of the patient. Hence, it is probable that the AI of this patient is not X-linked. It is more likely to be an autosomal mutation.

Matched MeSH terms: Dental Enamel Hypoplasia/pathology
Fulltext Dental management of patient with Williams Syndrome - A case report

Wong D, Ramachandra SS, Singh AK

Contemp Clin Dent, 2015 9 1;6(3):418-20.
PMID: 26321847 DOI: 10.4103/0976-237X.161908

Williams syndrome is a multisystemic rare genetic disorder caused by deletion of 26-28 genes in the long arm of chromosome 7. It is characterized by developmental and physical abnormalities including congenital cardiovascular abnormalities, mental retardation, neurological features, growth deficiency, genitourinary manifestations, gastrointestinal problems, musculoskeletal problems, unique behavioral characteristics, and dental problems. Dental abnormalities include malocclusion, hypodontia, malformed teeth, taurodontism, pulp stones, increased space between teeth, enamel hypoplasia, and high prevalence of dental caries. Authors report a 17-year-old female patient with underlying Williams syndrome. Oral features and problems seen in the patient are listed. Malocclusion and screwdriver shaped teeth were noticed. Generalized widening of the periodontal ligament space with vital teeth was seen. This finding has not been reported in cases of Williams syndrome earlier. Precautions taken during dental treatment in patients with Williams syndrome are also discussed.

Matched MeSH terms: Dental Enamel Hypoplasia