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Molar-incisor-hypomineralisation (MIH). Retrospective clinical study in Greek children. I. Prevalence and defect characteristics.
Eur Arch Paediatr Dent. 2008 Dec; 9(4):200-6.EA

Abstract

AIM

This was to evaluate the prevalence and the clinical characteristics of MIH in a group of Greek children.

METHODS

During the years 2003--2005, all MIH cases diagnosed according to the recently set criteria were selected from the new patients clinic of a Community Dental Centre for Children (Athens). Age, gender and teeth involved were recorded. The severity of MIH was determined collectively by dividing the affected teeth in two groups; a) mild defect (demarcated opacities) and b) moderate/severe defect (enamel breakdown and atypical restorations). Evaluation of the distribution of the affected teeth within MIH cases was performed in a separate group of 225 affected children aged 8-12 years with their entire 12 'index' teeth erupted.

RESULTS

From the 3,518, 5.5 to 12 year old children that were examined, there were 360 (10.2%) children with MIH, 211 (58.6%) females and 149 (41.4%) males, with 1,926 affected teeth, 1,231 molars and 695 incisors. In the molars group, maxillary molars were more frequently affected (87.8/90.3%) than mandibular (81.7/82.2%). In the central incisor group, maxillary teeth were also more frequently affected (50/55%) than mandibular (24.4/25%), while laterals were the least affected. In all there were 37.9% molars with moderate/severe defects as compared with 4.9% incisors, the remaining 62.1% and 95.1% respectively being mild. The various associations between the affected teeth were evaluated in the sub-group of 225 MIH children with all 'index' teeth erupted (1,286 affected teeth, 776 molars and 510 incisors), with mean number of affected teeth per child being 5.7; separately for molars 3.4 and for incisors 2.2. In these cases 28.4% of the children had only molars affected and 71.6% had both molars and incisors. In descending order the associations of affected teeth more frequently found were: 4 molars/2 incisors (23.5%), 4 molars/4 incisors (16.8%), 4 molars alone (15.1%) and 2 molars alone (9.7%), the remaining being much less.

STATISTICAL ANALYSIS

As age increased the clinical severity of the affected teeth became more prevalent (p=0.0001), and when the total number of affected teeth was assessed the likelihood of having severe defect was also increased (p=0.001).

CONCLUSION

The prevalence of the defect in the present study was 10.2% with maxillary teeth being more frequently affected. Severity increased with age. Mild defects were much more frequent, particularly in incisors. The total number of teeth affected and the most frequently found associations were, 4 molars/2 incisors, 4 molars/4 incisors, 4 molars alone and 2 molars alone.

Authors+Show Affiliations

Dept of Paediatric Dentistry, Community Dental Center for Children, Athens, Greece. lygidakis@ath.forthnet.grNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

19054473

Citation

Lygidakis, N A., et al. "Molar-incisor-hypomineralisation (MIH). Retrospective Clinical Study in Greek Children. I. Prevalence and Defect Characteristics." European Archives of Paediatric Dentistry : Official Journal of the European Academy of Paediatric Dentistry, vol. 9, no. 4, 2008, pp. 200-6.
Lygidakis NA, Dimou G, Briseniou E. Molar-incisor-hypomineralisation (MIH). Retrospective clinical study in Greek children. I. Prevalence and defect characteristics. Eur Arch Paediatr Dent. 2008;9(4):200-6.
Lygidakis, N. A., Dimou, G., & Briseniou, E. (2008). Molar-incisor-hypomineralisation (MIH). Retrospective clinical study in Greek children. I. Prevalence and defect characteristics. European Archives of Paediatric Dentistry : Official Journal of the European Academy of Paediatric Dentistry, 9(4), 200-6.
Lygidakis NA, Dimou G, Briseniou E. Molar-incisor-hypomineralisation (MIH). Retrospective Clinical Study in Greek Children. I. Prevalence and Defect Characteristics. Eur Arch Paediatr Dent. 2008;9(4):200-6. PubMed PMID: 19054473.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Molar-incisor-hypomineralisation (MIH). Retrospective clinical study in Greek children. I. Prevalence and defect characteristics. AU - Lygidakis,N A, AU - Dimou,G, AU - Briseniou,E, PY - 2008/12/5/pubmed PY - 2009/5/8/medline PY - 2008/12/5/entrez SP - 200 EP - 6 JF - European archives of paediatric dentistry : official journal of the European Academy of Paediatric Dentistry JO - Eur Arch Paediatr Dent VL - 9 IS - 4 N2 - AIM: This was to evaluate the prevalence and the clinical characteristics of MIH in a group of Greek children. METHODS: During the years 2003--2005, all MIH cases diagnosed according to the recently set criteria were selected from the new patients clinic of a Community Dental Centre for Children (Athens). Age, gender and teeth involved were recorded. The severity of MIH was determined collectively by dividing the affected teeth in two groups; a) mild defect (demarcated opacities) and b) moderate/severe defect (enamel breakdown and atypical restorations). Evaluation of the distribution of the affected teeth within MIH cases was performed in a separate group of 225 affected children aged 8-12 years with their entire 12 'index' teeth erupted. RESULTS: From the 3,518, 5.5 to 12 year old children that were examined, there were 360 (10.2%) children with MIH, 211 (58.6%) females and 149 (41.4%) males, with 1,926 affected teeth, 1,231 molars and 695 incisors. In the molars group, maxillary molars were more frequently affected (87.8/90.3%) than mandibular (81.7/82.2%). In the central incisor group, maxillary teeth were also more frequently affected (50/55%) than mandibular (24.4/25%), while laterals were the least affected. In all there were 37.9% molars with moderate/severe defects as compared with 4.9% incisors, the remaining 62.1% and 95.1% respectively being mild. The various associations between the affected teeth were evaluated in the sub-group of 225 MIH children with all 'index' teeth erupted (1,286 affected teeth, 776 molars and 510 incisors), with mean number of affected teeth per child being 5.7; separately for molars 3.4 and for incisors 2.2. In these cases 28.4% of the children had only molars affected and 71.6% had both molars and incisors. In descending order the associations of affected teeth more frequently found were: 4 molars/2 incisors (23.5%), 4 molars/4 incisors (16.8%), 4 molars alone (15.1%) and 2 molars alone (9.7%), the remaining being much less. STATISTICAL ANALYSIS: As age increased the clinical severity of the affected teeth became more prevalent (p=0.0001), and when the total number of affected teeth was assessed the likelihood of having severe defect was also increased (p=0.001). CONCLUSION: The prevalence of the defect in the present study was 10.2% with maxillary teeth being more frequently affected. Severity increased with age. Mild defects were much more frequent, particularly in incisors. The total number of teeth affected and the most frequently found associations were, 4 molars/2 incisors, 4 molars/4 incisors, 4 molars alone and 2 molars alone. SN - 1818-6300 UR - https://www.unboundmedicine.com/medline/citation/19054473/Molar_incisor_hypomineralisation__MIH___Retrospective_clinical_study_in_Greek_children__I__Prevalence_and_defect_characteristics_ L2 - https://dx.doi.org/10.1007/BF03262636 DB - PRIME DP - Unbound Medicine ER -