Evaluation of Shear Bond Strength of Two Dentin Bonding Agents with Two Desensitizers (An In-Vitro Study).

Background: The esthetic quality of a restoration may be as important to the mental health of the patient as the biological and technical qualities of the restoration are to his physical or dental health. In Conservative Dentistry; to mimic, repair and reconstruct the natural tooth structure for the long term, would be based on the use of a restorative material retained only by an adhesive system, whether in load bearing or non-load bearing environments. To achieve high strength, bonds between tooth structure and restorative materials have been a long term goal of dental profession. Aim: The aim of this in vitro study was to compare the shear bond strength of two different dentin bonding agents with two different desensitizers. Materials and Methods: Eighty molars were taken, which were ground to expose dentin. The teeth were divided into two major groups. Each major group was subdivided into four subgroups of 10 samples each. Groups Ia and IIa were treated as dry bonding groups, groups Ib and IIb were treated as moist bonding groups, group Ic and IIc were rewetted with Gluma desensitizer, and groups Id and IId were rewetted with Systemp® desensitizer. Major group I was treated with Gluma comfort bond and Charisma. Major group II was treated with 3M ESPE Adper™ Single Bond 2 and 3M ESPE Filtek™ Z250. The samples were thermocycled and shear bond test was performed using Instron machine. The data was analyzed using one-way analysis of variance and Tukey’s significant different test. Results: The results revealed that the specimens rewetted with Gluma desensitizer showed the higher shear bond strength compared to all other groups, irrespective of the bonding agent or composite resin used. Conclusion: It can be concluded that the moist or rewetting technique could preserve the micro-morphological integrity of the collagen resulting in the optimum penetration of adhesive resin into the demineralized layer, thus, giving higher bond strength.

Evaluation Of Shear Bond Strength Of Two Dentin Bonding Agents With Two Desensitizers – An In-Vitro Study.

Background & Objective: The aesthetic quality of a restoration may be as important to the mental health of the patient as the biological and technical qualities of the restoration are to his physical or dental health. In Conservative Dentistry; to mimic, repair and reconstruct the natural tooth structure for the long term, would be based on the use of a restorative material retained only by an adhesive system, whether in load bearing or non-load bearing environments. To achieve high strength, bonds between tooth structure and restorative materials have been a long term goal of dental profession. Objective is to compare the shear bond strength of two different dentin bonding agents with two different desensitizers. Methodology: Eighty molars were taken, which were ground to expose dentin. The teeth were divided into two major groups. Each major group was subdivided into four subgroups of 10 samples each. Groups Ia and IIa were treated as dry bonding groups, groups Ib and IIb were treated as moist bonding groups, group Ic and IIc were rewetted with Gluma desensitizer, and groups Id and IId were rewetted with Systemp® desensitizer. Major group I was treated with Gluma comfort bond and Charisma. Major group II was treated with 3M ESPE Adper™ Single Bond 2 and 3M ESPE Filtek™ Z250. The samples were thermocycled and shear bond test was performed using Instron machine. The data was analyzed using one-way analysis of variance and Tukey’s significant different test. Results: The results revealed that the specimens rewetted with Gluma desensitizer showed the higher shear bond strength compared to all other groups, irrespective of the bonding agent or composite resin used. Conclusion: It can be concluded that the moist or rewetting technique could preserve the micromorphological integrity of the collagen resulting in the optimum penetration of adhesive resin into the demineralized layer, thus, giving higher bond strength.

RADIX ENTOMOLARIS – A Case Series Of Endodontic Management Of A Rare Anatomic Variation In Mandibular Molars.

Radix Entomolarisis the presence of a distolingual supernumerary root found in the first, second, and third mandibular molars .The prevalence of three-rooted mandibular first molars appears to be less than 5% in Eurasian and Asian populations. This case series describes successful endodontic management of a series of seven cases of Radix Entomolaris

An insight into dentin desensitizing agents - In vivo study.

Aims: It is widely accepted that dentin hypersensitivity is an uncomfortable condition, which affects the function and quality of life. This study determines the difference in efficacy of four desensitizing agents. Subjects and Methods: An in vivo study was conducted to compare four dentin desensitizing agents on 40 patients. Age, sex, and place of the patient were recorded. Hydroxyapatite containing agent, potassium nitrate containing, sodium fluoride containing, and natural resin containing agents were used for the study. The baseline measurement for pain perceived due to hypersensitivity was recorded by visual analog scale (VAS). Then after application of the respective desensitizing agent, the last score was taken after 7 days. Statistical Analysis Used: The agents were compared in terms of mean differences in their VAS scale readings. Kruskall-Wallis test and Mann-Whitney tests were used to compare the efficacies of the four agents. Results: The four desensitizing agents which contain different active agents were effective in relieving dentin hypersensitivity. Not much significant difference was found among the four. However, propolis (natural resin-containing agent) showed better clinical response in patients among the four, followed by sodium fluoride-containing agent. Conclusions: Propolis proves to be a good natural and nontoxic option for treatment of dentin sensitivity.