Mahoorkar S.,HKES SN Institute of Dental science and Research |
Jain A.,Dental XPERTS |
Cauvery K.,PDU Dental College |
Kumar P.,Al Badar Rural Dental College and Hospital |
Havale R.,AMES Dental College
Journal of Clinical and Diagnostic Research | Year: 2014
An implant-level impression is often desired for designing and fabricating an implant-supported fixed restoration. This clinical report describes the use of modified press-fit metal implant fixture mount as an impression coping for making an impression of closely placed implants. The fixture mount is easier to manipulate, time saving and more comfortable for both the clinician and patient because the implant fixture mount is connected to the implant by pressing on instead of screwing. As compared to plastic press fit impression coping, metal fixture mount will not distort when modification of fixture mount are required in convergently or closely placed implants. It has the advantage of both the open-tray and closed-tray implant impression techniques.
PubMed | HKES SN Institute of Dental science and Research, NITTE University and Al Badar Rural Dental College and Hospital
Type: Journal Article | Journal: Journal of conservative dentistry : JCD | Year: 2016
To ascertain the role of One hundred and twenty human single-rooted extracted teeth divided into five groups. Group I (control): intact teeth, Group II: no apical treatment done, Group III divided into two subgroups. In Groups IIIa and IIIb, root apex treated with lactic acid of acidic and neutral pH, respectively. Group IV: apical root cementum exposed to lactic acid and roughened to mimic the apical resorption. Group V: apical treatment done same as Group IV and root-end filling done using mineral trioxide aggregate (MTA). Apical one-third of all samples immersed in Adhesion and penetration was observed in Group IIIa and Group IV. Only adhesion in Group II and IIIB and no adhesion and penetration in Group I and V.Adhesion and penetration of
Comparative Evaluation of Friction Resistance of Titanium, Stainless Steel, Ceramic and Ceramic with Metal Insert Brackets with Varying Dimensions of Stainless Steel Wire: An In vitro Multi-center Study
PubMed | Rajiv Gandhi Institute of Medical science, HKES SN Institute of Dental science and Research, Saraswati Dhanwantari Dental College and Hospital and SB Patil Dental College and Hospital
Type: Journal Article | Journal: Journal of international oral health : JIOH | Year: 2014
The orthodontist seeks an archwire-bracket combination that has both good biocompatibility and low friction. Hence, the aim of this multicenter in vitro study was to evaluate and compare the frictional resistance generated between titanium (Ti), stainless steel (SS), ceramic and ceramic with metal insert (CMI) brackets with SS wires of varying dimensions in a specially designed apparatus.The material used in this study were Ti, SS, Ceramic and CMI with 0.018 slot manufactured with zero degree tip and -7 torque premolar brackets (3M, Unitek) and SS wires of varying dimensions (0.016 round, 0.016 0.016 square, 0.016 0.022 rectangular and 0.017 0.025 rectangular) used. The frictional resistance was measured using Instron Universal testing machine (Model no. 4301). The specimen population in each center composed each of 160 brackets and wires. Differences among the all bracket/wire combinations were tested using (one-way) ANOVA, followed by the student Newman Keuls multiple comparisons of means ranking (at P < 0.05) for the determination of differences among the groups.Ti bracket in combination with 0.017 0.025 SS rectangular wire produced significant force levels for an optimum orthodontic movement with least frictional resistance.Ti brackets have least resistance and rectangular wires produced significant force. These can be used to avoid hazards of Nickel. SS brackets revealed higher static frictional force values as the wire dimension increased and showed lower static friction than Ti brackets for all wires except the thicker wire. Our study recommends the preclusion of brackets with rough surface texture (Ti brackets) with SS ligature wire for ligating bracket and archwire are better to reduce friction.