Permanent Maxillary Teeth Research Articles

Evaluation of the Apical Sealing Ability of Resin and Silicon Based Sealers by Dye Extraction Method: An In Vitro Study

Introduction: Thorough, chemo-mechanical preparation of the root canal is required to completely eliminate microorganisms from the dentinal tubules. Faulty obturation in the apical area is the pathway from which bacteria and their toxins pass on to the periapical area and this leakage can be studied by sealability studies. Aim: To evaluate the apical sealing ability of three sealers i.e., AH Plus, Roekoseal and Adseal using passive dye penetration test and a dye extraction test with Methylene blue dye to evaluate the apical leakage. Materials and Methods: The present study was an experimental in-vitro study, carried out at MGM Dental College and Hospital, Navi Mumbai, Maharashtra, India over a period of 10 months (from August 2013 to May 2014). Eighty freshly extracted human permanent maxillary central incisor teeth were obtained. The crowns of the teeth were sectioned at/below cemento-enamel junction and divided into five groups: Groups I, II and III were obturated with gutta-percha and three different sealers, and groups IV and V were the two control groups. Passive dye penetration test was performed to evaluate penetration of the dye by means of capillarity followed by dye extraction test. At the end of dye extraction procedure, the supernatant solution obtained was analysed using an Ultraviolet spectrophotometer. Significance was set at 5%. Statistical analysis was performed by using IBM Statistical Package for the Social Sciences (SPSS) statistical software version 20 (Armonk, New York, United States). The normality of data in each group was tested using Shapiro-Wilk test. The mean absorbance values of the five groups were compared using one-way ANOVA. Further to compare the level of absorbance of dye among various groups, Tukey’s post-hoc test was applied. Results: The mean values of dye absorbance of all groups were as follows, AH Plus (0.02638), Roekoseal (0.06713), Adseal (0.03575), positive control group (1.36250) and negative control group (0.01894). One-way ANOVA showed p<0.001, thus indicating there was a significant difference between the dye absorbance values of all the groups. Tukey’s post-hoc test showed statistically significant difference in dye absorbance of the experimental groups when compared to positive control group. There was no significant difference in dye absorbance when experimental groups were compared to each other. When AH Plus was compared with Roekoseal, the p-value was 0.568 and 0.997 with Adseal whereas when Roekoseal was compared with Adseal the p-value was 0.778. Conclusion: The mean dye absorbance value of AH Plus was found to be least and that of Roekoseal was highest in the experimental groups. AH Plus gave the best results, as least dye was extracted from this group, indicating least dye penetration and minimum microleakage followed by Adseal and Roekoseal.

Accuracy of three different customized lingual orthodontic appliance systems in achieving predicted results on maxillary anterior teeth: A Retrospective Cohort Study.

OBJECTIVE:To comparatively evaluate the ability of three different customized lingual appliance systems in achieving predicted results with respect to the mesiodistal crown tip, labiolingual crown inclination, in–out position of Maxillary permanent anterior teeth, and Maxillary arch form.METHODS:Three commercial houses: Incognito, iLingual 3D, and Lingual matrix were analysed in this study. The final sample size consisted of 42 cases. Fourteen digital prediction and posttreatment models of the maxillary arch were provided by three orthodontic offices each using a different system. Discrepancies between the prediction and posttreatment model in mesiodistal tip, labiolingual inclination, in–out position of anterior teeth, and arch form were analyzed.RESULTS:Incognito displayed the highest accuracy in all parameters except for in–out positioning. Lingual Matrix showed greater precision in achieving planned mesiodistal positions than labiolingual inclination while it was just the opposite for iLingual 3D. All three systems proved to be clinically reliable in achieving the predicted in–out positions of permanent Maxillary anterior teeth.CONCLUSION:These systems were considerably accurate in achieving planned treatment goals with minute deviations from the predicted value.

Sexual Dimorphism in the Permanent Maxillary First Molar Teeth in the Rajasthan Population

ABSTRACT Introduction Sex estimation in forensic science is an essential step for medicolegal purposes. Teeth are an excellent material for anthropological, odontological, genetic, and forensic investigations as they are known to resist a variety of ante-mortem and post-mortem insults. Sexual dimorphism is an indicator of gender differences that can be observed in several aspects of the human skeleton such as the pelvis, cranium, femur, humerus, canines, and other structures. Maxillary first molars are the first permanent teeth to erupt into the oral cavity at the mean age of 6–7 years and are less commonly impacted as compared to canines. The purpose of this study was to indicate whether sexual dimorphism also exists in the first maxillary molar of humans. Aim To determine the sexual dimorphism in the permanent maxillary first molar teeth using the mesiodistal and buccolingual crown width. Materials and methods The present study was performed on 80 patients from the National Institute of Medical Sciences and Research, Jaipur. Mesiodistal and buccolingual width were measured on the basis of intraoral examination and plaster modal with the help of Vernier caliper. Sexual dimorphism (in percentage) was calculated from these measured parameters. Results The mean values of right and left mesiodistal width and buccolingual width were less for females than for males and the differences were statistically significant for buccolingual width but nonsignificant for mesiodistal width. The sexual dimorphism was slightly greater on the right side than the left side. Buccolingual width of right maxillary molar teeth shows maximum sexual dimorphism among all measurements (both intraoral 5.13% and cast 5.18%). Conclusion This study signifies the possible role of morphometric study of canine teeth in estimation of gender and it can be used in forensic investigations where gender determination of skeletal remains is difficult. How to cite this article Sharma S, Sharma S. Sexual Dimorphism in the Permanent Maxillary First Molar Teeth in the Rajasthan Population. J Mahatma Gandhi Univ Med Sci Tech 2020;5(1):4–8.

Location and shape of the apical foramina in posterior teeth: an in-vitro analysis.

To analyze the morphology of shapes and positions of the apical foramina in permanent maxillary and mandibular posterior teeth. Examination of the apical foramina was performed with a stereomicroscope at a magnification of 10×. The anatomic parameters evaluated were the shapes of the peripheral contours of the apical foramina (rounded, oval, asymmetric, and semilunar). The location of the apical foramen was recorded as a center, buccal, lingual, mesial, and distal surface. Results have shown that the frequency of deviation was 68% in all teeth being assessed, while the most frequent location of the apical foramen was in the center, with 32% followed by distal with 18%. The common shape of apical foramina was round shape in all the teeth. The variation in the location and shapes of apical foramina in teeth. The commonest deviation in location of apical foramina was distal and the frequent shape was of a round shape.

Periodontal plastic surgery for the management of an ankylosed permanent maxillary lateral incisor: A clinical report with 5-year follow-up

Anterior maxillary tooth ankylosis disturbs the development of the alveolar bone process, leading to discrepancies between the cervical gingival margin and incisal edge position of the affected tooth, and therefore, the esthetics is compromised. Proposed treatments in adults and growing patients have been used successfully, but they have disadvantages and are contraindicated in some circumstances. This article proposes an alternative treatment for an ankylosed permanent maxillary anterior tooth with a slow replacement resorption rate in an adult patient, for whom a combination of a periodontal plastic surgery procedure and a fixed dental prosthesis was used to correct the esthetics. This treatment has less risk of complications, preserves the ankylosed tooth as long as possible, creates an optimal gingival contour, and maintains the alveolar bone for further treatment should the tooth be lost.

An in-vitro Comparison of the Bleaching Efficacy of 35 Percent Carbamide Peroxide with Established Intracoronal Bleaching Agents

Introduction: Intracoronal bleaching is the simplest, least invasive, and least expensive means available to lighten non-vital discolored teeth. The objective of the study: To evaluate the intra coronal bleaching efficacy of 35% Carbamide peroxide relative to 35% Hydrogen peroxide and Sodium perborate using artificially stained extracted human teeth. Materials and Methods: Eighty extracted human permanent maxillary and mandibular anterior teeth and single-rooted premolars were artificially stained using whole human blood and root canal treatment was completed. They were bleached twice 7 days apart using: Group I (n=20) – 35% Carbamide peroxide gel, Group II (n=20) – 35% Hydrogen peroxide gel, Group III (n=20) – 2 gm Sodium perborate mixed with per ml of distilled water, Group IV (n=20)– Distilled water only (control). Evaluation of shade was performed on day 0,7,14. Results: On day 7, In Groups I and Group II, there was a reduction in the shade by 2 vita tab positions, whereas Group IIIlightened by 1-tab position only. On day 14, CP and HP lightened by overall 3-tab positions and SP by 2-tab positions. There were no statistical differences between the groups on day 7 and day 14. Conclusion: 35% Carbamide peroxide, 35% Hydrogen peroxide and Sodiumperborate were equally effective for Intra coronal bleaching.

Mesiodense; a common dental problems in pediatric patient. A case report

A mesiodense is a most common supernumerary tooth which is one of the most significant dental anomalies at the primary and early mixed dentition stages. The reported prevalence of mesiodense in general population ranges between 0.15% to 1.9% and more frequently found in the permanent dentition but rarely found in primary dentition. Mesiodense are primarily responsible for eruption disturbances or delay of the maxillary anterior permanent teeth emergence. Therefore the dentists and parents are great concern about malocclusion and esthetic problems which is caused by mesiodense. Early detection, diagnosis and treatment of mesiodense is important to prevent further complications in permanent dentition. A case of mesiodense of 8 years old child in upper anterior region in mixed dentition and their management have been discussed.
 Update Dent. Coll. j: 2020; 10 (2): 26-28

Disorders of Dental Hard Tissues Induced by Radioiodine-131 (I-131) Therapy Used in Differentiated Thyroid Cancer: An In Vitro Study.

This study aimed to evaluate, in vitro, the effects of I-131 on enamel and dentin in healthy human incisive permanent maxillary teeth. Our in vitro model analogue with the in vivo conditions of differentiated thyroid carcinoma patients treated with I-131, consisted in a solution of I-131 dissolved in artificial saliva. A total of 48 teeth were divided into eight groups (n = 6): control, irradiation groups at 3, 6, 12, 24, 36, 48, and 192 h, respectively. At the end of radiation exposure, radioiodine activity of specimens was assessed. Fine microstructure, nanostructure, surface roughness, and hidroxyapatite (HAP) crystallite diameter were investigated by atomic force microscopy (AFM) to both enamel and dentin structures. There is a constant increase of radioactivity in dental structures at 3, 6, 12, 24 h, due to progressive retention and I-131 migration, with a maximum at 36 h. Enamel showed notable alterations, which was correlated with the increase of the treatment time. A relevant visible distance between the HAP prisms was observed after 24 h. The surface suffered a loss in its compact structure. I-131 acts in the same way on HAP crystallites in dentin as in those in enamel. It was noticed that their morpho-dimensional changes occurred only after 12 h of treatment. Radioiodine-131 determines degradation of enamel and dentin by starting from the alteration of the crystalline network of HAP prisms, transforming them from compact materials into an agglomeration of rocky submicron structures.

Association between the Mesiobuccal Canal Configuration, Interorifice Distance, and the Corresponding Root Length of Permanent Maxillary First Molar Tooth: A Cone-beam Computed Tomographic Study

IntroductionThe aim of this cone-beam computed tomographic study was to evaluate the association between the mesiobuccal root canal configuration (RCC), interorifice distance (IOD), and the corresponding root length of a permanent maxillary first molar tooth. MethodsOne hundred cone-beam computed tomographic scans obtained from the computerized data bank of the institute were studied. The IOD between the first mesiobuccal and second mesiobuccal canal was measured in the axial section where the second mesiobuccal canal was first visualized. The root length was measured from the cementoenamel junction to the root apex in the coronal and sagittal section. The associations of these parameters with the RCC (based on Vertucci’s classification) were evaluated. ResultsThe predominant RCC was observed to be Vertucci type II (89%). The mean root length with this configuration was 11.19 ± 1.35 mm. In type IV RCC, the mean root length was 9.13 ± 0.52 mm. A statistically significant association was established between the root length and RCC (P < .05). In roots with type II and type IV RCC, the mean IOD was 2.58 ± 0.04 mm and 2.62 ± 0.1 mm, respectively. No statistically significant relation was established between the IOD and the type of RCC (P > .05). ConclusionsThe length of the mesiobuccal root is an important anatomic parameter for predicting the type of RCC in the permanent maxillary first molar tooth.

Extraction of Maxillary Teeth Without a Palatal Injection: A Randomized Control Trial

ABSTRACT Purpose: The aim of this research was to assess the clinical effectiveness of buccal infiltration of 4% Articaine hydrochloride in comparison to routine buccal and palatal infiltration during the extraction of maxillary molars. Patients and Methods Current research were carried out on 200 patients where study group included 100 patients, and 100 were controls. Unilateral extractions were made to patients in the research group. All patients were injected with 1.8 ml of 4% Articaine hydrochloride with 1:100.000 epinephrine in the buccal vestibule of chosen tooth for removal without performing palatal injection. The maxillary tooth was removed after 8 minutes. One hundred participants in the control group were subject to the same procedure with palatal injection. Upon extracting, every patient completed a face pain scale (FPS) and visual analog scale (VAS). Results: According to the FPS and VAS scores, the difference in pain rates was statistically non-significant (p>0.05) when compared with permanent maxillary dental removal with or without palatal injection. Conclusion: Permanent maxillary tooth extraction is possible when 1.8 mL of 4% Articaine is deposited in the buccal vestibule of the tooth without palatal anesthesia.

Palatal Soft Tissue Thickness on Maxillary Posterior Teeth and Its Relation to Palatal Vault Angle Measured by Cone-Beam Computed Tomography

Objective Analyzing palatal soft tissue thickness in cone-beam computed tomography (CBCT) images and evaluating the relationship between tissue thickness and palatal vault angulation. Methods Out of 1,737 CBCT images, fifty-six images met the inclusion criteria and were included in this cross-sectional study. The palatal vault angle on the maxillary first molar was measured and divided the images into 3 groups. The soft tissue thickness between the maxillary first premolar and second molar was measured at a distance of 3, 6, 7, 8, and 9 mm from the cementoenamel junction. All the image measurements were performed using CBCT-viewer software. Result In this study, 56 CBCT images with full permanent maxillary posterior teeth and absence of light scattering were found. The mean age of the patients was 31.59 ± 13.92 years. The moderate and deep palatal vault angle patterns had the greatest and least prevalence, respectively. The average thickness on shallow, moderate, and deep palatal vault groups was 4.02 ± 0.58, 3.75 ± 0.73, and 3.43 ± 0.38 mm, respectively. Furthermore, the mean palatal mucosal thickness was statistically different between the deep and shallow palatal vault angle groups (p < 0.05, power of test 0.8). Based on the Pearson correlation coefficient, there was a negative correlation between the palatal mucosal thickness and palatal vault angle (p < 0.05, power of test 0.85). Conclusion A negative correlation between the palatal mucosal thickness and palatal vault angle was observed. Furthermore, this study suggested that the shape of the palatal vault can be one of the supporting data for evaluating the graft dimensions.

Accurate Detection of Non-Cavitated Proximal Caries in Posterior Permanent Teeth: An in vivo Study.

PurposeThis study aimed to compare the sensitivity and specificity of DIAGNOdent versus bitewing radiographs in detecting non-cavitated proximal caries.Patients and MethodsThis observational prospective study included 120 proximal surfaces, without obvious cavitation, on permanent mandibular and maxillary posterior teeth in patients over 16 years old. The DIAGNOdent test was performed, and digital bitewing radiographs were obtained; these were compared with a standard reference method, which comprised a clinical assessment of the proximal surfaces following the application of an orthodontic separator between the teeth for 7 days. Each test was performed by a different investigator blinded to the assessment results of the other examiners.ResultsThe DIAGNOdent device exhibited a higher sensitivity in detecting enamel proximal caries (95%) than digital bitewing radiographs (64%), and the specificity of DIAGNOdent (89%) was greater than that of bitewing radiographs (77%). Regarding the detection of dentin caries, the sensitivities of DIAGNOdent and bitewing radiographs were similar (both 62%); however, the specificity of DIAGNOdent was higher (98% versus 88%). The results of the Kruskal–Wallis test revealed a significant difference in DIAGNOdent scores across the three diagnoses (sound tooth surfaces, enamel caries, dentin caries) (p-value <0.001).ConclusionThe diagnostic accuracy of DIAGNOdent in detecting enamel caries is significantly higher than that of digital bitewing radiography. The routine use of DIAGNOdent can facilitate an accurate diagnosis of early carious lesions and inform the implementation of preventive treatment.

Comparison of the buccal injection versus buccal and palatal injection for extraction of permanent maxillary posterior teeth using 4% articaine: a split mouth study

In spite of the development of modern injection techniques, palatal injection is still a painful experience for patients. A plethora of techniques has been tested to reduce this. One such technique that has been claimed to work is administering articaine on the buccal side alone for the extraction of maxillary teeth due to its ability to diffuse through soft and hard tissues more reliably than other local anaesthetics. This split mouth study evaluated the efficacy of 4% articaine with 1:100000 adrenaline to avoid the painful palatal injection for bilateral permanent maxillary tooth extraction in 50 patients. The 100mm 10 point Visual Analog Scale/Wong Baker Facial Pain Scale was used to rate the amount of pain felt on injection, on probing the tissues prior to, or during, extraction, and one hour postoperatively. Although the buccal injection alone resulted in lower pain while injecting the anaesthetic, it did not result in the absence of pain before tooth extraction as has been suggested by various studies. A total of 74% patients required a palatal injection on the study side. We conclude that in most cases, when using a buccal injection alone, one cannot rely on the diffusion of articaine for effective palatal anaesthesia. Despite this, we suggest that as an initial option in young patients, the operator can consider avoiding the painful palatal injection by the use of articaine to prevent aversion to dental treatment. Postoperatively, the difference in pain levels was not statistically significant and no patient showed signs of lesions at the injection sites.

Enamel print pattern in Deutero-Malay sub race based on extracted female permanent maxillary central incisors

Introduction: Enamel print pattern is a series of lines representing the enamel rod ends pattern. These lines are seen running in varying directions creating distinct sub-patterns; thus, enamel print pattern allows for personal identification. This study was aimed to investigate the enamel print pattern in Deutero-Malay sub race based on extracted female permanent maxillary central incisors. Methods: This study used descriptive-analytic methods. The population of this study was Deutero-Malay sub-race female individuals who came to Batu Pahat Dental Surgery, Johor, Malaysia. The samples were 31 post-extracted permanent maxillary central incisors teeth in good condition, with closed root apex. Photomicrographs and a digital photo of samples were taken, then analysed using SourceAFIS-1.7.0 biometric software. Results: The results showed that there was a combination of few sub-patterns. The most prominent sub-pattern was linear-branched (21.36%), in decreasing orders of prominence were the wavy-branched (19.42%), wavy-unbranched (16.50%) and linear-unbranched (15.53%). The less common sub-patterns were the whorl-open (9.71%), loop (6.80%), whorl-closed (5.83%) and stem-like (4.85%). Conclusion: The enamel print pattern in every central incisor has no similarity; hence can be a possible tool for personal identification.

Early childhood tooth bud removal practice (“Ibyinyo”): preventable dental damage

Tooth bud removal called Ibyinyo is the practice of removing the developing tooth buds, usually done on an infant, typically performed by traditional healers who believe that this practice will reduce fever and diarrhoea in children. This practice is most prevalent in East-African countries, including Rwanda. These procedures are mostly performed in non-sterile conditions using basic sharp instruments. We will discuss the case of a 10-year-old female patient who was presented at the dental clinic, with two malformed permanent canine teeth. Clinical examination revealed malformed enamel and elongated permanent right maxillary canine tooth left mandibular canine tooth with crown malformation. She was also presented with retained (primary) left maxillary lateral incisor tooth and missing left maxillary canine tooth. In addition, the ectopic eruption of left maxillary central incisor tooth and missing permanent right mandibular canine tooth were noted. All these complications resulted from tooth bud removal that the patient had experienced in her early childhood. Her malformed right maxillary and left lower mandibular canine teeth were reshaped, using composite filling materials, to improve her appearance aesthetically. Ibyinyo is preventable damage, done out of ignorance and superstitious practices that can be stopped by growing social awareness. Therefore, educating parents through community-based campaigns on the detrimental consequences of early childhood tooth bud removal through Ibyinyo practice might be helpful to eradicate this harmful and unnecessary practice.

A comparative evaluation of the fracture resistance of endodontically treated teeth with simulated invasive cervical resorption cavities restored with different adhesive restorative materials: An in vitro study.

Aim:The aim of the study was to compare the fracture resistance of endodontically treated teeth with simulated invasive cervical resorption cavities, restored with different restorative materials, namely, conventional glass-ionomer cement (CGIC), resin-modified glass-ionomer cement (RMGIC), flowable composite (FC), and giomer.Methods:Sixty extracted human permanent maxillary central incisor teeth were assigned to six groups,which were, Group 1 (intact teeth, control), Group 2 (teeth with biomechanical preparation and resorption cavity), Group 3 (CGIC), Group 4 (RMGIC), Group 5 (FC), and Group 6 (giomer). Except for Group 1, other groups were subjected to endodontic treatment. Teeth of Group 2 were left unobturated and teeth of Groups 3–6 were obturated. A simulated resorption cavity was prepared labially in the specimens belonging to Groups 2–6 and restored with respective restorative materials. The specimens were subjected to compressive load until failure in an Instron testing machine and the load at failure was recorded in Newtons.Statistical Analysis:The data obtained were statistically analyzed using one-way ANOVA, pair-wise comparison was made with Tukey's multiple comparison test, and P < 0.05 was considered statistically significant.Results:There was a statistically significant difference in the fracture resistance of intact teeth and endodontically treated teeth with simulated invasive cervical resorption cavities restored with different adhesive restorative materials. Among the restored teeth, there was no significant difference.Conclusion:Intact teeth were found to have the highest resistance to fracture followed by those restored with giomer, FC, RMGIC, and CGIC in that order.

Evaluation of the bond strength of reattached incisal fragments using different techniques: An In vitro study

Aim: The aim of this study is to compare the bond strength of fractured teeth reattached using four different techniques, i.e., simple reattachment, overcontour, internal dentinal groove, and enamel bevelling using nanohybrid resin composite. Materials and Methods: A total of eighty extracted permanent maxillary central incisor teeth was used in this study. Sample was uniformly divided into four groups, i.e., (n = 20). Group I: Fracture teeth reattached with a simple technique. Group II: Fracture teeth reattached with overcontouring technique. Group III: Fracture teeth reattached with the internal dentinal groove technique. Group IV: Fracture teeth reattached with enamel bevelling technique. After the fracture teeth reattachment, the specimens were mounted on a custom-made fixture and were kept in saline till the specimens were subjected to the bond strength testing. The universal testing machine was used for the determination of bond strength. One-way ANOVA test was used to analyze the data and post hoc test was used for comparing (testing) three or more means (groups or variables) for statistical significance. SPSS 17.0 version was the software used in this analysis, and the level of significance was set at P = 0.002. Results: Highest bond strength was seen with Group II (reattached with overcontour technique) (9.04 ± 4.94) followed by Group III (inter-dentinal groove technique) group (8.04 ± 2.48), then Group IV (enamel bevelling technique) (5.87 ± 3.77), and least bond strength was with Group I (simple reattachment) (5.17 ± 1.59). Conclusion: Overcontour fracture reattachment technique displayed significantly higher bond strength as compared to simple reattachment, internal dentinal groove, and enamel bevelling techniques.

Effect of calcium hydroxide intracanal medicament on the push-out bond strength of RelyX Unicem self-adhesive cement

Aim: This study was aimed to determine the use of calcium hydroxide (Ca(OH)2) intracanal medicament effect on the push-out bond strength of RelyX Unicem self-adhesive cement onto the root canal wall. Materials and Methods: A total of 50 extracted human maxillary permanent incisor teeth were randomly divided into control and experimental groups (n = 25 for each group). The control group was prepared for routine root canal treatment followed by post space preparation. RelyX Unicem self-adhesive cement is used for the cementation of fiber post in the root canal, as in experimental group, Ca(OH)2intracanal dressing was placed into the root canal for a week, followed by root canal filling, post space preparation, and cementation of fiber post using RelyX Unicem cementation. Each sample was divided into coronal, middle, and apical root sites. They were horizontally sliced and examined using scanning electron microscope (SEM). Three slices from each of the three sites were subjected to push-out test for bond strength measurement. Independent t-test was used to compare the push-out bond strength of RelyX Unicem on the root canal wall. One-way analysis of variance and pairwise comparison test were used for the statistical analysis. The significant level was set as P Results: The significant differences in bond strength were demonstrated between the different sites of the root, where the coronal and apical with the P value 0.031 and 0.020, respectively. However, the middle third of the root showed no statistically significant difference, where P = 0.072. Conclusions: Intermediate Ca(OH)2dressing has an effect on the bond strength of RelyX Unicem self-adhesive resin cementation on the root canal wall.

Permanent tooth eruption based on chronological age and gender in 6-12-year old children on Madura

Background: Tooth eruption, the movement of teeth toward the oral cavity clinically marked by the emergence of the cusp or incisal edge, is very important in determining the chronological age of a child. Unfortunately, tooth eruption in 6-12-year olds on the island of Madura has yet to be investigated. Purpose: This study aimed to analyze differences in permanent tooth eruption between boys and girls aged 6 to 12 years old on Madura. Methods: This study employed an observational analytic design in combination with a cross-sectional approach. The samples used in this study were selected by means of simple random sampling technique. Post-selection informed consent of the child subjects was obtained with their chronological age being assessed and determined prior to tooth eruption. The normality of the data was subsequently analyzed by application of a one sample non-parametric Kolmogorov Smirnov test. Thereafter, repeated Anova tests were conducted to determine differences in the permanent tooth eruption of the subjects. Results: Based on the normality test results, the significance value of the permanent maxillary teeth in the male subjects was 0.993, while that of their permanent mandibular teeth was 0.695. In contrast, the significance value of the permanent maxillary teeth in the female subjects was 0.970, while that of their permanent mandibular teeth was 0.918. According to the results of the repeated measure ANOVA test, differences existed in the eruption of the permanent maxillary and mandibular teeth between the males and females with a significance value (ρ) of 0.020. The mean value of permanent mandibular tooth eruption in the females was 56.59 ± SD 33.403, while that of their permanent maxillary tooth eruption was 50.77 ± SD 34.201. The mean value of the permanent mandibular tooth eruption in the males was 55.31 ± 33.024, while that of their permanent maxillary tooth eruption was 48.77 ± SD 34.201. Conclusion: On Madura, the permanent teeth of chronological 6-12-year old females, particularly their permanent mandibular canine teeth, erupt earlier than those of their male counterparts.

Prevalence of second canal in the mesiobuccal root of permanent maxillary molars from a Turkish subpopulation: a cone-beam computed tomography study

Permanent maxillary molar teeth have the most complex root and canal systems. This study aimed to determine the frequency and the localisation of secondary mesiobuccal canal (MB2) in the mesiobuccal roots of permanent maxillary molars in a Turkish subpopulation using cone-beam computed tomography (CBCT) and compare them by different age groups and gender. In this retrospective study, a total of 800 maxillary molar teeth in 200 subjects were investigated. The distances between canals were calculated from the centre point of the MB2 canal (PMB2) to the centre point of the mesiobuccal canal (PMB1) and the centre point of the palatal canal (PP). The incidence of MB2 canals was found to be 33.5% (23.2% in females, 43.6% in males) in 200 subjects. A significant difference was found between age groups and genders in terms of the frequency of MB2 (p < 0.05). The distances between PMB1- -PMB2 were 2.95 ± 0.58 mm, 3.08 ± 0.67 mm for 1MM and 2MM, respectively. For 1MM and 2MM, the averages of PMB2-PP distances were 5.81 ± 1.09 mm and 5.55 ± 1.09 mm, respectively. The contralateral formation of the MB2 canals was 90.5% (16, 26) in the first molars and 93.9% in the second molars (17, 27). The contingency rate in the first quadrant was 86.0% (16, 17) and 83.5% (26, 27) in the second quadrant. It is important for the clinician to know the high probability of finding the MB2 canal in the maxillary first and second molars. CBCT imaging can facilitate the clinician to detect complex and variable root canal anatomy.