ABSTRACT
This study is an attempt to compare the NiTi rotary and K-files hand instrumentation on root canal preparation of primary and permanent molars for their efficiency in preparation time, instrument failure and shaping the canals. About 20 primary mandibular second molar (I) and 20 permanent mandibular first molar (II) were selected. Each was further divided into 10 for K-files (a) and 10 for NiTi (b) groups, respectively. Results showed that preparation time Ib Ia and IIab<IIa, which was highly significant. In instrument failure, Ia (40%), IIa (30%) showed more deformation but not fracture and Ib (10%), IIb (20%) showed fracture, but not deformation. Profiles showed good canal taper and smoothness compared to the K-files. To conclude profile 0.04 taper 29 series, prepared canal rapidly than conventional K-file with good taper, smoothness though the flow was not satisfactory. Instrument failure with K-files was less. In primary teeth preparation time, instrument failure with profile was less compared to the permanent. To conclude it's encouraging to use the profiles in primary teeth.
Subject(s)
Dental Alloys/chemistry , Dental Pulp Cavity/anatomy & histology , Efficiency , Equipment Design , Equipment Failure , Humans , Materials Testing , Molar/anatomy & histology , Nickel/chemistry , Root Canal Preparation/instrumentation , Stainless Steel/chemistry , Time Factors , Titanium/chemistry , Tooth, Deciduous/anatomy & histologyABSTRACT
A nasopalatine duct cyst is that which occurs in or near the incisive canal. A case of nasopalatine duct cyst in a 14-year-old male is reported here.
Subject(s)
Adolescent , Humans , Male , Maxillary Diseases/pathology , Nonodontogenic Cysts/pathology , Nose Diseases/pathology , Palate/pathologyABSTRACT
The common devices used for oral hygiene measures are toothbrush, dentifrice and oral rinses. Present study was carried out to know the level of contamination of toothbrush after brushing and at the same time, to know the efficacy of various disinfecting solution in reducing their contamination. Thirty two children in the age group of 12-14, residing in Government Hostel were selected. They were divided into four groups of 8 each, and were supplied with toothbrushes. Toothbrushes were cultured to assess the contamination at different time intervals. Control group had shown the highest percentage of contamination. It was concluded that cleaning of the oral cavity is not the only procedure in maintaining the oral hygiene, the oral hygiene devices should also be kept clean.