Porto TS, Tonetto MR, Lorenzetti CC, Bandéca MC, Borges AH, Neto STP, de Campos EA, Dinelli W. Surface Roughness Analysis of Dental Ceramics Treated with Hydrofluoric Acid and Aluminum Oxide Jet. World J Dent 2014;5(1):1-5.

This study evaluated the microhardness and compressive strength of composite and light curing characterizing materials (LCCMs) by intrinsic technique.

Eighty composite specimens with a cylindrical shape were prepared and divided into eight groups (n = 10): Group E—composite-Enamel shade (ES); Group T— composite-Translucent shade (TS); Group W—White Tetric Color Pigment (Ivoclar/Vivadent) LCCM; Group B—Black Tetric Color Pigment (Ivoclar/Vivadent) LCCM; Group E/W/E—TS/ White Tetric Color Pigment LCCM/ES; Group E/B/E—ES/ Black Tetric Color Pigment LCCM/ES; Group E/W/T—ES/White Tetric Color Pigment LCCM/TS; Group E/B/T—ES/Black Tetric Color Pigment LCCM/TS. The specimens were submitted to a microhardness and compressive strength tests. Data were subjected to ANOVA, Tukey tests (5%) and pearson correlation.

There were significant differences among the groups (p = 0.00). The Pearson correlation showed a p = 0.85. The mean values for microhardness: Group E—73.30a; Group T—66.47b; Group E/W/T—63.71bc; Group E/W/E—62.08bc; Group E/B/E—57.47c; Group E/B/T—55.61c; Group W—39.69d; Group B—37.87d. The mean values for compressive strength: Group E—493.12a; Group T—481.96a; Group E/B/E—359.45b; Group E/W/T—358.64b; Group E/B/T— 357.01b; Group E/W/E—353.73b; Group W—136.62c; Group B—41.22d. The use of LCCM by intrinsic technique reduced the microhardness and compressive strength of composite. There is a strong correlation between microhardness and compressive strength.

The use of light curing characterizing materials combined with direct resin restorations can adversely reduce microhardness and compressive strength of direct esthetic restorations.

Barcellos DC, Batista GR, Pleffken PR, Valera MC, Torres CRG, de Araújo MAM. Evaluation of Compressive Strength and Microhardness of Composites Associated to Light Curing Characterizing Materials. World J Dent 2014;5(1):6-10.

The objective of this study was to graphically display the pattern and magnitude of stress distribution along the periodontal ligament and the alveolar bone of upper first molars on application of intrusive forces using microscrew implants.

A computer simulation of threedimensional model of maxillary first molars and second molars bilaterally with their periodontal ligament and alveolar bone, with microscrew implants, force element and a transpalatal arch were constructed on the basis of average anatomic morphology. Finite element analysis was done to evaluate the amount of stress and its distribution during orthodontic intrusive force.

Overall maximum stress in this study was seen in the alveolar bone in the implant insertion area of 7.155 N/mm^2. Maximum stress in the periodontal ligament was seen in middle third distocervical palatal root surface of the first molar (0.008993 N/mm²). Maximum stress in the enamel was seen in the distal aspect of the cementoenamel junction (0.423 N/mm²). Maximum stress in the dentin was observed in apical one-third of the mesiobuccal root surface of first molar (0.1785 N/mm²).

In this study with the use of palatal implant and transpalatal arch, we found that there was no tipping observed during intrusion. This study demonstrates that significant true intrusion of maxillary molars could be obtained in a wellcontrolled manner by using fixed appliances with microscrew implant as bony anchorage.

Pavithra AS, Prashanth GS, Mathew S, Shekar SE. Analysis of Stress in the Periodontal Ligament and Alveolar Bone of the Maxillary First Molars during Intrusion with Microscrew Implants: A 3D Finite Element Study. World J Dent 2014;5(1):11-16.

Eye is one of the organs that is disposed to many hazards among dental practitioners due to the long strenuous working hours and various kinds dental equipment. These workrelated eye hazards range from eye injuries, fatigue, hazards due to lasers and light-curing units. Awareness among dental practitioners regarding the same is important so that they employ protective measures to avoid any eye hazards.

The aim of this study was to find the awareness regarding the occupational eye hazards among dental practitioners of Bengaluru city by assessing the usage of protective eye wear among them.

A questionnaire-based survey was conducted among 150 dental practitioners of Bengaluru city.

The questionnaire comprised of questions regarding their age and gender and whether they used protective eye wear while working.

Using percentage, the number of dental practitioners using protective eye wear and those not using the same were compared.

It was found that slightly more than half of the surveyed dental practitioners used protective eye wear while the rest did not use any eye protection while working. There is need to make more and more dental practitioners aware about the eye hazards that can happen due to work and emphasis needs to be laid on the use of protective eye wear while working so that these hazards can be minimized.

Kaul R, Shilpa PS, Sanjay CJ. Usage of Protective Eye Wear among the Dental Practitioners of Bengaluru City: A Survey with Review of Literature. World J Dent 2014;5(1):17-20.

Chachada AD, Kamble RH. Influence of Morphology of Maxillary Central Incisor on Expression of Torque using 2D Surface Scanning and Confirmation with 3D Photographic Model: An in vitro Study. World J Dent 2014;5(1):21-27.

Palatal injection, in spite of many modernized injection techniques, remains a painful experience for the patient. The aim of this study was to demonstrate if maxillary third molars could be extracted using only buccal infiltration of 2% lignocaine hydrochloride (HCl) with adrenaline 1:80,000 without the need for supplemental palatal injection.

Three hundred patients were selected randomly and divided into two groups of 150 each. In the experimental group, 2 ml of 2% lignocaine hydrochloride with 1:80000 adrenaline was injected into the buccal vestibule of the tooth to be extracted. Extraction was performed after a waiting period of 7 minutes postinjection. Equal number of 150 patients were used as control and were subjected to the same protocol, with additional palatal injection. Pain experienced during extraction of both groups were recorded using visual analog scale and faces pain scale. Mann-Whitney test was used to analyze pain between both the groups.

Statistical analysis of the two groups, experimental and control groups do not defer with respect to visual analog and faces pain score.

Palatal injection for extraction of maxillary third molar is not mandatory.

Pawar S, Desai RA, Padhye M, Shevale V, Khosa R, Keswani E, Thakker S, Shah V. Palatal Injection: A Myth or a Reality in Maxillary Third Molar Extraction. World J Dent 2014;5(1):28-32.

AlShahrani I. Diagnosis and Referral of Orthodontic Cases: An Institutional Survey among Dental Graduates. World J Dent 2014;5(1):33-36.

This study evaluated the microbial effects of a single subgingival irrigation of chlorhexidine and benzydamine in advanced periodontitis on a comparative basis in the absence of physical debridement using the microbiological parameter.

Patients who attended the Department of Periodontia, Madras Dental College were selected. The experimental site consisted of two teeth with Chronic Periodontitis, a pocket depth of 4 to 6 mm and a Gingival Index score of 2. The study has been designed to cover the following three groups:

A sample of 30 were selected, 10 samples in each group. The experimental sites of the three groups were assessed using the following Microbiological parameters: (1) spirochetes, (2) motile bacteria, (3) cocci, (4) other microorganisms.

The microbiological analysis showed that the response of the Saline and Chlorhexidine with regard to the Spirochetes followed a concave pattern. But Benzydamine showed a slow tapering effect in annihilating the Spirochetes. In the case of Motile bacteria also the variation in the Saline was negligible and in the chlorhexidine group the trough occurred between first week and second week and then revived, whereas in Benzydamine alone there was no question of revival but the Motile bacteria followed the pattern of sine curve. With regard to Cocci though Saline showed good response it was not significant, whereas chlorhexidine and benzydamine recorded a highly appreciable response. In the case of other microorganisms Saline had no significant effect, whereas Chlorhexidine had significant effect at the end of 1 week and Benzydamine had a sea-saw effect throughout the different periods of time.

The subgingival action of Benzydamine can be favored and preferred to that of Chlorhexidine and Saline because of its sustained progressive response.

Wesley SJ. Microbial Evaluation of a Single Subgingival Irrigation with Chlorhexidine and Benzydamine in Advanced Periodontitis. World J Dent 2014;5(1):37-41.

The literature suggests that periodontal disease and diabetes mellitus share a two-way relationship. The aim of this study was to evaluate and compare the levels of adrenomedullin (ADM) in gingival crevicular fluid (GCF) of periodontally healthy and periodontitis patients with or without type 2 diabetes with different glycemic controls.

Ninety patients were included in the study and were divided into five groups based on CPI scores and ADA classification of diabetes. Probing pocket depth (PPD) and clinical attachment level (CAL) were measured in all the subjects. GCF was collected from all the participants using micropipettes. ADM levels were measured in GCF samples by enzyme-linked immunosorbent assay.

The results showed higher levels of ADM in patients with periodontitis as compared to healthy group. Significant correlation was present between PPD and CAL and ADM levels in all periodontitis patients with or without type 2 diabetes.

Increase in GCF levels of ADM from periodontal health to disease and in periodontitis patients with type 2 diabetes with the worsening of glycemic control underlines the possible role of ADM in mounting a protective response to worsening disease state.

Garg A, Suchetha A, Sapna N, Apoorva SM, Bhat D, Puzhankara L. GCF Adrenomedullin Levels in Healthy and Periodontitis Patients with or without Type 2—Diabetes Mellitus: Clinicobiochemical Study. World J Dent 2014;5(1):42-46.

Treatment of perio-endo lesions is challenging for the clinician. A combination of root canal treatment and periodontal treatment is needed in order to provide good results. There is a high failure rate due to the difficulty in eliminating the microflora that colonizes and complicates the lesion. Conventional root canal treatment (RCT) sometimes is not enough to prevent failure in such lesions. Hence the Aim of this study was to evaluate of use of LSTR (Lesion Sterilization Tisssue Repair) therapy in conjunction with, periodontal therapy and RCT in management of combined perio-endo lesions.

This study was conducted on 26 patients with perio-endo lesions, The affected teeth were tender to percussion, presented no mobility, and meticulous periodontal probing revealed all pockets to be more than 6 mm in depth. Periapical radiographs of the teeth confirmed the extensive coronal carious lesion involving the pulp and revealed large periapical lesion. The patients were classified into two groups, each of 14 patients, control group (A) RCT done by using conventional sealer, and group (B), RCT done by mixing sealer with LSTR material in equal proportions. All teeth were treated by open flap debridement.

In group B patients, after follow-up for 3, 6, 9 and 12 months, we found excellent prognosis (98%), with no symptoms of pain and there was marked improvement in periodontal parameters for all teeth. However, on the other hand, in group A patients, the prognosis was found to be 90%.

According to results of this study, we highly recommend the use of LSTR with sealer in RCT together with periodontal treatment in management of perio-endo lesions to decrease the rate of failure and improve the periodontal condition.

Saleh AA, Eid HA, Abdelaziz KM. Lesion Sterilization Tissue Repair as Adjunct to Conventional Root Canal Treatment of Combined Periodontic-Endodontic Cases. World J Dent 2014;5(1):47-52.

This study focused on the Modified Dental Anxiety Scale to determine the prevalence of dental anxiety and assess the psychometric properties in Nigerian population.

Included in the study were 619 participants (204 males and 415 females) chosen conveniently from among the dental patients, students of post basic nursing and staff nurses, all from University of Benin Teaching Hospital, Benin City, Nigeria. The mean age was 31.34 (11.77) years. Participants completed a questionnaire containing the Modified Dental Anxiety Scale.

The prevalence of high dental anxiety was found to be 10.7% at the cut-off point ≥ 19. Cronbach's alpha for the present Nigerian sample was 0.80. Factor analysis revealed one factor with an eigenvalue greater than 2. This factor explained 55.9% of the variance of the items. In addition, the MDAS showed a significant difference between the genders, with the female (X̄ =13.86;SD= 4.64) reporting higher dental anxiety score than the male (X̄ =12.62;SD= 4.73).

MDAS demonstrated satisfactory and acceptable psychometric properties. Therefore, dental surgeons, clinical psychologists, psychiatrists and other therapists can use MDAS as an objective tool for detecting and possible management of high dental anxiety in Nigeria.

Koleoso ON, Akhigbe KO. Prevalence of Dental Anxiety and the Psychometric Properties of Modified Dental Anxiety Scale in Nigeria. World J Dent 2014;5(1):53-59.

Mascarenhas VI, de Molon RS, Tavares LJ, Mendes LMF, Tonetto MR, Bandeca MC. The use of Computer Guided Implant Surgery in Oral Rehabilitation: A Literature Review. World J Dent 2014;5(1):60-63.

Digit sucking is a common childhood behavior, which has an adaptive value for children up to the fourth year of life. Chronic prolonged habit may cause deleterious effects on dentofacial structures. Reminder therapy using blue grass appliance has been proven successful to intercept thumb sucking habit.

Four cases of digit sucking were corrected by nonpunitive reminder therapy using customized blue grass appliance.

Four patients’ digit sucking habit ceased after the insertion of the customized bluegrass appliance. These appliances were very comfortable to the patient and successful in intercepting the habit within a short period of time. It is an effective treatment option with limited treatment complications.

Surendran S, Amarlal D, Asokan S, Thomas E. Customized Bluegrass Appliance. World J Dent 2014;5(1):64-66.

de Campos Neves ATS, Volpato LER, Oliveira TM, Palma VC, Tonetto MR, Bandeca MC, Borges AH. Root Resorption of Maxillary Incisors caused by Bilaterally Impacted Canines: An Evaluation by Cone-Beam Computed Tomography. World J Dent 2014;5(1):67-71.

Bandéca MC, Pinto SCS, Tonetto MR, Frizzera F, de Figueiredo Pereira K, Borges AH, Saad JRC, dos Santos RSS. Interactions between Restorative Dentistry and Periodontics: Luting Post Nonmetallic (Part II). World J Dent 2014;5(1):72-75.

Radhika MB, Paremala K, Sudhakara M, Soumya M. Talons Cusp: A Report of Seven Cases and Review of Literature. World J Dent 2014;5(1):76-79.