European Journal of Molecular & Clinical Medicine

Background: Pulp necrosis denotes the cessation of the metabolic processes of this tissue, with consequent loss of its structure, as well as its natural defenses. A great variety of endodontic sealers are available commercially and they are divided into different groups according to their chemical composition (Eg: Zinc oxide eugenol based, MTA based, Epoxy resin based). Hence; the present study was undertaken for comparing the marginal adaptation of epoxy resin based sealer (AH Plus) and MTA based sealer (MTA Fillapex) at dentin sealer interface at apical one third of the root canals.
Materials & methods: 50 Straight maxillary central incisors (each root with curvature less than 5◦), free from any open apices, cracks, calcified canals, canal curvature, and resorptive defects teeth were used. The canals were dried with absorbent paper points and were randomized into two groups of 25 teeth each, as following. Group 1: Obturation using AH PLUS, and Group 2: Obturation using MTA fillapex. All the sample teeth were obturated using single cone obturation technique. All specimens were dehydrated using aqueous ethanol and then were gold sputtered. Specimens were observed under Scanning Electron Microscope (SEM). Overall average gaps at this interface were calculated for each sample and results were tabulated.

Background: Accurate implant impressions play a significant role and serve as a starting
point in the process of producing good working casts. The present study was conducted to
assess accuracy of different materials used in impressions for fixed partial dentures.
Materials & Methods: It comprised of alginate, polysulphide, polyether and condensation
silicone impression material. Digital photographs of the master model and of the stone casts
were taken to evaluate the impression materials’ accuracy and the discrepancies between
them were measured.
Results: The mean discrepancies between the prepared tooth edges in the master model and
in the stone casts in group I was 0.32 mm, in group II was 0.18 mm, in group III was 0.14
mm and in group IV was 0.36 mm. The difference was significant (P< 0.05).
Conclusion: Different impression materials and techniques influenced the stone casts’
accuracy in a way that polyether, polysulfide and condensation silicone were more accurate
than the other materials

Introduction: The ill effects of tobacco on human health have been well demonstrated yet tobacco continues to find a very special place in the present day to day life probably because of the stimulant effects of nicotine.5, The present study was conducted to assess failure rate of dental implant in smokers and healthy subjects. Materials & methods: 54 smokers (group I) and equal number of healthy subjects (group II) who received dental implant in last 5 years of both genders were recruited. Amount of bone loss around the implant over 1mm of bone loss in the first year and over 0.3 mm bone loss every subsequent year were considered as failures. Results: Group I consisted of 68 patients (smokers) with 76 dental implants. Group II consisted of 54 patients (healthy subjects) with 78 implants. In group I, there were 16 and in group II, there were 3 dental implant failures. At first year, in group I, mean bone loss around implant was 1.21 mm and 0.5 mm in group II. Upto 5 years, in group I, mean bone loss around implant was 2.7 mm and 1.4 mm in group II. The difference was significant p< 0.05).Conclusion: Smokers had higher dental implant failure rates as compared to healthy subjects.