MyMedR

Fulltext Teeth in osteogenesis imperfecta: a light microscopic study

Siar CH

Med J Malaysia, 1986 Jun;41(2):161-5.

The light microscopic features of the dentine in three teeth from two cases of osteogenesis imperfecta (OJ) are presented. Results show that teeth in OJ distinctively have a more uniform and tubular mantle dentine, and a characteristic laminated circumpulpal dentine formed by distorted incremental bands alternating with parallel rows of interglobular dentine and interrupted by comet-shaped vascular canals. The study indicated that in the absence of overt OJ features, the changes in dentine alone are sufficiently characteristic to establish such a diagnosis.

Matched MeSH terms: Molar/pathology

The prevalence and distribution of enamel defects in 11-12 year old Malaysian schoolchildren

Nik-Hussein NN, Razak IA

Ann Acad Med Singap, 1989 Sep;18(5):591-3.

PMID: 2619248

The prevalence and symmetrical distribution of enamel defects were studied in 218 Malaysian school children aged 11-12 years old. The tooth prevalence of enamel defect was 40.3 per cent. The first permanent molars were the most severely affected, whereas the lower incisors were the least severely affected. Overall there was no sex difference. Distribution of symmetry was assessed between the right and left tooth pairs as well as for upper and lower teeth. A higher proportion of symmetry was observed for the right and left tooth pairs and the lingual surfaces showed a greater percentage of bilateral distribution.

Matched MeSH terms: Molar/pathology

Fulltext Prevalence and severity of Molar-Incisor Hypomineralisation in children in Fujairah, United Arab Emirates

Brejawi MS, Venkiteswaran A, Ergieg SM, Sabri B

Eur J Paediatr Dent, 2023 Jun 09;24(2):139-143.

PMID: 37042091 DOI: 10.23804/ejpd.2023.1646

AIM: This study aims to find the prevalence of MIH in children in the city of Fujairah, United Arab Emirates, utilising the current standardised guidelines for diagnosis and calibration.

BACKGROUND: Molar-Incisor Hypomineralization (MIH) prevalence in paediatric patients has been widely studied. However, most of the available studies have utilised criteria that did not offer consistent diagnostic and calibration tools, which resulted in incomparable results.

METHODS: Cross-sectional study. One hundred sixty-two school children aged 7-9 years in the city of Fujairah, UAE have been randomly selected and orally examined for the presence of MIH lesions. This was conducted following Ghanim et al. [2015] guidelines and after calibrating examiners following Ghanim et al. [2017] training manual.

CONCLUSION: MIH prevalence was high in the city of Fujairah, UAE. More studies utilising the standardised criteria are required for valid comparisons. Further research on the aetiology of MIH is also needed.

Matched MeSH terms: Molar/pathology

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: Molar/pathology

Proximal tooth surface quality and periodontal status

Yusof Z

J Oral Rehabil, 1991 Jan;18(1):95-102.

PMID: 2051253

The aim of this study was to determine the periodontal status in relation to the quality of the adjacent proximal tooth surface. The gingival index (GI) and probable pocket depth (PD) were measured in 144 contra-lateral pairs of sound vs. restored and 95 contra-lateral pairs of sound vs. carious surfaces in 124 patients. The restorations studied were silver amalgams and tooth-coloured filling materials, the margins of which were supragingival or level with the gingival margins. The results showed that the GI and PD were greater for both restored and carious tooth surfaces than for the contra-lateral sound surfaces. When all the teeth were grouped together, the differences in the mean values of GI and PD were statistically significant at the P less than or equal to 0.05 level. A comparison between restored and carious (non-paired) tooth surfaces revealed higher mean values of GI and PD for the latter, which were highly significant at the P less than 0.001 level. Thus the present study shows that proximal tooth surface quality influences the health status of the adjacent periodontium.

Matched MeSH terms: Molar/pathology

Cross-sectional morphology and minimum canal wall widths in C-shaped roots of mandibular molars

Chai WL, Thong YL

J Endod, 2004 Jul;30(7):509-12.

PMID: 15220648

The cross-sectional canal morphology and minimum widths of buccal and lingual canal walls were studied in 20 mandibular molars with C-shaped roots and canal orifices. The roots were mounted in clear resin blocks and sectioned transversely at 1-mm intervals. A total of 154 cross-sections were evaluated with an image analyzer. Twelve different longitudinal canal configurations were identified. The most prevalent were types 1-2 and 1-2-1 with each type occurring in four roots. Evaluation of the cross-sectional morphology showed that the configurations were complete "C" (27%), incomplete C (64%), and non-C (9%). The mean value for the minimum width of the lingual canal wall was 0.58 +/- 0.21 mm and the buccal wall was 0.96 +/- 0.26 mm. This suggests that there is a higher risk of root perforation at the thinner lingual walls of C-shaped canals during shaping and post canal preparation procedures. Both buccal and lingual canal walls were frequently narrower at mesial locations.

Matched MeSH terms: Molar/pathology*

Validity and reproducibility of ICDAS II in primary teeth

Shoaib L, Deery C, Ricketts DN, Nugent ZJ

Caries Res, 2009;43(6):442-8.

PMID: 19907175 DOI: 10.1159/000258551

The aim of this in vitro study was to assess the validity and reproducibility of the ICDAS II (International Caries Detection and Assessment System) criteria in primary teeth. Three trained examiners independently examined 112 extracted primary molars, ranging from clinically sound to cavitated, set up in groups of 4 to mimic their anatomical positions. The most advanced caries on the occlusal and approximal surfaces was recorded. Subsequently the teeth were serially sectioned and histological validation was undertaken using the Downer and Ekstrand-Ricketts-Kidd (ERK) scoring systems. For occlusal surfaces at the D(1)/ERK(1) threshold, the mean specificity was 90.0%, with a sensitivity of 75.4%. For approximal surfaces, the specificity and sensitivity were 85.4 and 66.4%, respectively. For occlusal surfaces at ICDAS code > or =3 (ERK(3) threshold), the mean specificity and sensitivity were 87.0 and 78.1%, respectively. For approximal surfaces, the equivalent values were 90.6 and 75.3%. At the D(3) threshold for occlusal surfaces, the mean specificity and sensitivity were 92.8 and 63.1%, and for approximal surfaces 94.2 and 58.3%, respectively. Mean intraexaminer reproducibility (Cohen's kappa) ranged from 0.78 to 0.81 at the ICDAS code > or =1 cut-off and at the ICDAS code > or =3 cut-off from 0.74 to 0.76. Interexaminer reproducibility was lower, ranging from 0.68 to 0.70 at the ICDAS code > or =1 cut-off and from 0.66 to 0.73 at the ICDAS code > or =3 cut-off. In conclusion, the validity and reproducibility of the ICDAS II criteria were acceptable when applied to primary molar teeth.

Matched MeSH terms: Molar/pathology

Effect of a single dose of low-level laser therapy on spontaneous and chewing pain caused by elastomeric separators

Qamruddin I, Alam MK, Fida M, Khan AG

Am J Orthod Dentofacial Orthop, 2016 Jan;149(1):62-6.

PMID: 26718379 DOI: 10.1016/j.ajodo.2015.06.024

The aim of this study was to see the effect of a single dose of low-level laser therapy on spontaneous and chewing pain after the placement of elastomeric separators.

Matched MeSH terms: Molar/pathology

Proximal caries lesion detection using the Canary Caries Detection System: an in vitro study

Jan J, Wan Bakar WZ, Mathews SM, Okoye LO, Ehler BR, Louden C, et al.

J Investig Clin Dent, 2016 Nov;7(4):383-390.

PMID: 26012784 DOI: 10.1111/jicd.12163

OBJECTIVE: This study investigated the accuracy of the Canary System (CS) to detect proximal caries lesions in vitro, and compared it with conventional methods: International Caries Detection and Assessment System (ICDAS) II and bitewing radiography (BW).

METHODS: Visible proximal surfaces of extracted human teeth were assessed by ICDAS-II before setting them in five manikin mouth models. Then contacting proximal surfaces in mouth models were assessed by BW and CS. Histological validation with polarized-light microscopy served as a gold standard. Pairwise comparisons were performed on area under the curve (AUC), sensitivity, and specificity of the three methods, and corrected using Bonferroni's method. Sensitivities and specificities were compared using a test of proportions and AUC values were compared using DeLong's method.

RESULTS: The CS presented significantly higher sensitivity (0.933) than ICDAS-II (0.733, P = 0.01) and BW (0.267, P

Matched MeSH terms: Molar/pathology

Fulltext Proliferative activity of cells from remaining dental pulp in response to treatment with dental materials

Lutfi AN, Kannan TP, Fazliah MN, Jamaruddin MA, Saidi J

Aust Dent J, 2010 Mar;55(1):79-85.

PMID: 20415916 DOI: 10.1111/j.1834-7819.2009.01185.x

The biological examination of pulp injury, repair events and response of dental pulp stem cells to dental restorative materials is important to accomplish restorative treatment, especially to commonly used dental materials in paediatric dentistry, such as glass ionomer cement (GIC) and calcium hydroxide (Ca(OH)(2)) lining cement.

Matched MeSH terms: Molar/pathology

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