Refine your search
Collections
Co-Authors
Journals
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
Bansal, Ajay
- An in Vitro Comparison of the Apical Seal Produced by Three Different Thermoplasticized Guttapercha Obturation Techniques in Oval Canals
Abstract Views :291 |
PDF Views:116
Authors
Affiliations
1 Department of Conservative Dentistry & Endodontics, Himachal Institute of Dental Sciences, Himachal Pradesh, IN
2 Department of Prosthodontics, Bhojia Dental College & Hospital, Himachal Pradesh, IN
3 Department of Conservative Dentistry & Endodontics, Swami Devi Dyal Dental College, Haryana, IN
1 Department of Conservative Dentistry & Endodontics, Himachal Institute of Dental Sciences, Himachal Pradesh, IN
2 Department of Prosthodontics, Bhojia Dental College & Hospital, Himachal Pradesh, IN
3 Department of Conservative Dentistry & Endodontics, Swami Devi Dyal Dental College, Haryana, IN
Source
Dental Journal of Advance Studies, Vol 3, No 1 (2015), Pagination: 39-46Abstract
The aim of this study was to evaluate and compare the sealing ability to obturate oval canals with three thermoplasticized guttapercha obturation techniques taking lateral condensation technique as the control. Ninety-five freshly extracted teeth were decoronated at2mmcoronal to CEJ. Biomechanical preparation was done using step back technique. The teeth were divided into three experimental groups of 30 teeth each and one control group of 5 teeth. The group I (control group) was obturated with lateral condensation technique, group II obturated with injectable thermoplasticized guttapercha technique, group III obturated with thermoplasticized guttapercha with downpack and backfill technique and group IV obturated with core carrier thermoplasticized guttapercha technique. The sealability of each technique was assessed by a dye penetration method. The ischolar_mains were given two full layers of nail polish varnish except apical 2mm. Specimens were then immersed in India ink for 48 hours. Robertson's technique was used to clear the specimens. The linear dye penetration was measured from anatomic apex to the deepest extent of dye penetration in a coronal direction using triocular stereomicroscope at 10 x magnification. The mean dye leakage of group I was 2.6700mm; group II 0.1713mm; group III 3.3977mm; group IV 2.3210mm . When the means of all the four groups were compared using KruskalWallis test the difference was found to be very highly significant with the value<.001**, meaning there by that group II is significantly better than the other three groups as far as sealing ability is concerned.Keywords
Apical Seal, Lateral Condensation, Injectable Thermoplasticized Guttapercha, Downpack and Backfill, Thermaflo.Full Text
- Estimation of Vertical Dimension of Occlusion in Edentuleous Patients Using Cephalometric Analysis
Abstract Views :331 |
PDF Views:94
Authors
Affiliations
1 Bhojia Dental College and Hospital, Haryana, IN
2 Haryana, IN
3 Rajasthan Dental College, Rajasthan, IN
4 Mullana Dental College, Haryana, IN
1 Bhojia Dental College and Hospital, Haryana, IN
2 Haryana, IN
3 Rajasthan Dental College, Rajasthan, IN
4 Mullana Dental College, Haryana, IN
Source
Dental Journal of Advance Studies, Vol 5, No 1 (2017), Pagination: 30-38Abstract
Thus, there is a need to replace the lost teeth and the supporting structures for the patient's social demands and functional rehabilitation. Prosthetic treatment with complete dentures is a very common treatment modality; the biggest challenge in its fabrication is to duplicate the normal vertical dimension. Failure can be avoided by completing the treatment without changing the vertical dimension and obtaining an optimal facial proportion. There are many methods to record VD. Radiographic cephalometry has been used as a diagnostic tool in Prosthodontics for over five decades and numerous authors, like Ricketts (1981), McNamara (1984) and Slavicek (1984) developed and computerized these techniques to co-relate and record VD in patients. However cephalometric analysis can help to visualize skeletal and facial proportion relation. The present study was done to use the lateral radiographs with cephalometric analysis, as it could be a simple, non-technique sensitive, non-invasive and atraumatic way to determine VD for complete denture patients and also to compare physiologic methods (swallowing/phonetics) with cephalometric method to record lower facial height.Keywords
Cephalometrics, Legan-Burstone Analysis, Mc Namara Analysis, Vertical Dimension of Rest, Vertical Dimension of Occlusion, Postural Rest Position.Full Text
References
- Zarb-Bolender et al. Prosthodontic treatment for edentulous patients.12th ed. 2004, Mosby, West line Industril Drive,St.Louis MO:268-97.
- Jayashree V Dikshit and Firoze D Mirza. Muscle relaxant and rest position - A cephalometric Study. J Prosthet Dent 1979;42:579-83.
- Alex Coulouriotes. A.B. Free Way Space. J Prosthet Dent 1955; 5:194-9.
- J.D. Orthlieb, M Laurent and O Laplanche. Cephalometric estimation of Vertical Dimension of Occlusion. J Oral Rehabil 2000;27:802-7.
- C Millet, C Jeannin, B Vincent & G Malquarti. Report on the determination of occlusal vertical dimension and centric relation using swallowing in edentulous patients. J Oral Rehabil 2003;30:1118-22.
- Douglas Allen Atwood. A cephalometric study of the clinical rest position of the mandible. Part I. The Variability of the Clinical Rest Position following the Removal of Occlusal Contacts. J Prosthet Dent 1955;10:504-9.
- Brian D Monteith. A cephalometric method to determine the angulation of the occlusal plane in edentulous patients. J Prosthet Dent 1985;54:81-7.
- M M Koller, L Merlini, G Spandre and S Palla. A comparative Study of two methods for the orientation of the occlusal plane and the determination of the vertical dimension of occlusion in edentulous patients. J Oral Rehabil 1992;19:413-25.
- Jay P Fitzgerald, Ram S Nanda, G Frans Currier. An evaluation of the nasolabial angle and the relative inclinations of the nose and upper lip. Am J Orthod Dentofac Orthop 1992;102:328-34.
- Ales Obrez, Jens C Turp. The effect of musculosketal facial pain on registration of maxillomandibular relationships and treatment planning: A synthesis of the literature. J Prosthet Dent 1998;79:194-9.
- H W Preiskel. Some observations on the postural position of the mandible. J Prosthet Dent 1965;15:625-33.
- Robert S Freeman. Adjusting A-N-B Angles to Reflect the Effect of Maxillary Position. Angle Orthod 1981;51(2):162-71.
- Charles J Burstone, Randal B James, H Legan, G A Murphy, and Louis A Norton. Cephalometrics for Orthognathic surgery. J Oral Surg 1978;36:269-77.
- Dr. S I Bhalajhi. Orthodontics, The Art and Science. 2nd ed. Arya (Medi) Publishing house, Darya Ganj, New Delhi 2001;148-50.
- Athanasios E Athanasiou. Orthodontic Cephalometry.1995 Mosby-Wolfe, Times Mirror International Publishers Limited.
- Thomas Rakosi. An Atlas and Manual of Cephalometric Radiography. 1982 Lea & Febiger-600 Washington Square, Philadelphia, Pennsylvania 19106 USA.
- Glenn L Gittelson. Vertical Dimension of Occlusion in Implant Dentistry: Significance and Approach. Implant Dentistry 2002;2:33-8.
- Herbert Swerdlow, B A, Bethesda. Roentgen cephalometric Study of Vertical Dimension Change in Immediate Denture patients. J Prosthet Dent 1964;14:635-49.
- H W Preiskel. Some observations on the postural position of the mandible. J Prosthet Dent 1965;15:625-33.
- Brian D Monteith. Cephalometrically programmed adjustable plane: A new concept in occlusal plane orientation for complete denture patients. J Prosthet Dent 1985;54:388-94.
- Allen M Kleinman and Irving M Sheppard. Mandibular rest levels with and without dentures in place in edentulous and complete denture wearing subjects. J Prosthet Dent 1972; 28:478-83.
- Franklin D Lo and W Stuart Hunter. Changes in Nasolabial angle related to maxillary incisor retraction. Am J Orthod 1982;82:384-90.
- D Brzoza, N Barrera, G Contasti and A Hernandez. Predicting vertical dimension with cephalograms,for edentulous patients. Gerodontology 2005;22:98-103.
- Charles J Burstone, Randal B James, H Legan, G A Murphy, and Louis A Norton. Cephalometrics for Orthognathic surgery. J Oral Surg1978;36:269-77.
- Robert M Ricketts. Perspective in the Clinical Application of Cephalometrics: The first fifty years. The Angle Orthod 1981;51:115-47.
- F Bassi, A Rizzatti, G Schierano & G Pret. Evaluation of the utility of cephalometric parameters in constructing complete denture. Part-II: placement of anterior teeth. J Oral Rehabil 2001;28:349-453.
- Geroge A Wessberg, Michael C Washburn, Frace N Epker and Kent O Dana. Evaluation of mandibular rest position in subjects with diverse dentofacial morphology. J Prosthet Dent 1982;48:451-9.
- Franklin D Lo and W Stuart Hunter. Changes in Nasolabial angle related to maxillary incisor retraction. Am J Orthod 1982;82:384-90.
- To Evaluate the Marginal Fit of Metal Copings Fabricated by Conventional Casting Procedure and Direct Metal Laser Sintering Technology-An in Vitro Study
Abstract Views :285 |
PDF Views:89
Materials and method: Forty tooth preparations were carried out over extracted mandibular molars. They were divided into two groups A and B of 20 each. For group A Co-Cr copings were fabricated by direct metal laser sintering (DMLS) and for group B by lost wax technique (LW). Glass-ionomer cement (GIC) was used to tack the copings over their preparations. Marginal fit was then evaluated directly under the stereomicroscope.
Results: The mean marginal gap of group A was 27.9±2.4 μm and group B was 40.4 μm. Statistical analysis using t-test showed highly significant difference (P>.05) between the marginal mean of the DMLS (group A) compared to LW (group B).
Conclusion: The DMLS copings demonstrated superior marginal fit compared to that of conventional Co-Cr casted copings.
Authors
Affiliations
1 Dept. of Prosthodontics, Bhojia Dental College and Hospital, Himachal Pradesh, IN
1 Dept. of Prosthodontics, Bhojia Dental College and Hospital, Himachal Pradesh, IN
Source
Dental Journal of Advance Studies, Vol 5, No 1 (2017), Pagination: 39-46Abstract
Purpose: The purpose of this in vitro study was to evaluate marginal fit of cobalt- chromium (Co-Cr) copings fabricated by direct metal laser sintering system (DMLS) and conventional lost-wax technique (LW).Materials and method: Forty tooth preparations were carried out over extracted mandibular molars. They were divided into two groups A and B of 20 each. For group A Co-Cr copings were fabricated by direct metal laser sintering (DMLS) and for group B by lost wax technique (LW). Glass-ionomer cement (GIC) was used to tack the copings over their preparations. Marginal fit was then evaluated directly under the stereomicroscope.
Results: The mean marginal gap of group A was 27.9±2.4 μm and group B was 40.4 μm. Statistical analysis using t-test showed highly significant difference (P>.05) between the marginal mean of the DMLS (group A) compared to LW (group B).
Conclusion: The DMLS copings demonstrated superior marginal fit compared to that of conventional Co-Cr casted copings.
Keywords
Cobalt Chromium, Direct Metal Laser Sintering, Porcelain Fused Metal Crowns.Full Text
References
- Petteno D, Schierano G, Bassi F, Bresciano ME, Carossa S. Comparison of marginal fit of 3 different metal-ceramic systems: an in vitro study. Int J Prosthodont 2000; 13:405-408.
- Hunter AJ, Hunter AR. Gingival margins for crowns: a review and discussion. Part 2. Discrepancies and configurations. J Prosthet Dent 1990;64:636-42.
- Kim KB, Kim WC, Kim HY, Kim JH. An evaluation of marginal fit of three-unit fixed dental prostheses fabricated by direct metal laser sintering system. Dent Mater 2013;29(7):e91-6.
- Bindl A, Mormann WH. Marginal and internal fit of all-ceramic CAD/CAM crowncopings on chamfer preparations. J Oral Rehabil 2005;32:441-7.
- Valderhaug J, Birkeland JM. Periodontal conditions in patients 5 years following insertion of fixed prostheses. Pocket depth and loss of attachment. J Oral Rehabil 1976;3: 237-43.
- Valderhaug J, Heloe LA. Oral hygiene in a group of supervised patients with fixed prostheses. J Periodontol 1977;48:221-4.
- Lang NP, Kiel RA, Anderhalden K. Clinical and microbiological effects of subgingival restorations with overhanging or clinically perfect margins. J Clin Periodontol 1983;10:563-78.
- Ucar Y, Akova T, Akyil M, Brantley W. Internal fit evaluation of crowns prepared using a new dental crown fabrication technique: laser-sintered Co-Cr crowns. J Prosthet Dent 2009;102:253-259.
- Faucher RR, Nicholls JI. Distortion related to margin design in porcelainfused-to-metal restorations. J Prosthet Dent 1980;43:149-55.
- Buchanan WT, Svare CW, Turner KA. The effect of repeated firings and strength on marginal distortion in two ceramometal systems. J Prosthet Dent 1981;45:502-6.
- Huang Z,Lu Zhang, Zhu J, Zhang X. Clinical marginal and internal fit of metal ceramic crowns fabricated with a selective laser melting technology. J Prosthet Dent 2015;113:623-27.
- Anusavice KJ. Phillips' science of dental materials. 11th ed. Phialdelphia: W.B. Saunders; 2003. p. 565, 584, 585.
- Vandenbroucke B, Kruth JP. Selective laser melting of biocompatible metals for rapid manufacturing of medical parts. Rapid Prototyping J 2007;13:196-203.
- Wu L, Zhu H, Gai X, Wang Y. Evaluation of the mechanical properties and porcelain bond strength of cobalt-chromium dental alloy fabricated by selective laser melting. J Prosthet Dent 2014;111:51-5.
- Yang X, Xiang N, Wei B. Effect of fluoride content on ion release from castand selective laser melting-processed Co-Cr-Mo alloys. J Prosthet Dent 2014;112:1212-6.
- Zeng L, Xiang N, Wei B. A comparison of corrosion resistance of cobaltchromium-molybdenum metal ceramic alloy fabricated with selective laser melting and traditional processing. J Prosthet Dent 2014;112:1217-24.
- Quante K, Ludwig K, Kern M. Marginal and internal fit of metal-ceramic crowns fabricated with a new laser melting technology. Dent Mater 2008;24:1311-1315.
- Ortorp OA, Jonsson D, Mouhsen A, Von Steyern PV. The fit of cobalt-chromium three-unit fixed dental prostheses fabricated with four different techniques: A comparative in vitro study. Dent Mater 2011;27:356-363.
- Oyague RC, Sanchez-Turrion A, Lopez-Lozano JF, Suarez Garcia MJ. Vertical discrepancy and microleakage of laser-sintered and vacuum-castimplant-supported structures luted with different cement types. J Dent 2012;40(2):123-30.
- Kim KB, Kim WC, Kim HY, Kim JH. Evaluation of the marginal and internal gap of metal-ceramic crown fabricated with a selective laser sintering technology: two- and three-dimensional replica techniques. J Adv Prosthodont 2013; 5(2): 179-186.
- Xu D,Xiang N,Wei B. The marginal fit of selective laser melting- fabricated metal crowns: an in vitro study. J Prosthet Dent 2014;112:1437-1440.
- Shillingburg HT. Fundamentals of fixed prosthosthodontics. 4th ed. USA: Quintessence publishing; 2012.p.149-164.
- Att W, Komine F, Gerds T, Strub JR. Marginal adaptation of three different zirconium dioxide three-unit fixed dental prostheses. J Prosthet Dent 2009;101:239-247.
- Bhaskaran E, Azhagarasan NS, Miglani S, Gajapathi B.Comparative Evaluation of Marginal and Internal Gap of Co-Cr Copings Fabricated from Conventional Wax Pattern, 3D Printed Resin Pattern and DMLS Tech: An In Vitro Study. J Indian Prosthodont Soc 2013; 13(3): 189-195.
- Akova T, Ucar Y, Tukay A, Balkaya MC, Brantley WA. Comparison of the bond strength of laser-sintered and cast base metal dental alloys to porcelain. Dent Mater 2008;24(10):1400-4.
- Beschnidt SM, Strub JR. Evaluation of the marginal accuracy of different all-ceramic crown systems after simulation in the artificial mouth. J Oral Rehabil 1999;26(7):582-93.
- Nawafleh NA, Mack F, Evans J, Mackay J, Hatamleh MM. Accuracy and reliability of methods to measure marginal adaptation of crowns and FDPs: a literature review. J Prosthodont 2013;22(5):419-28.
- McLean JW, von Fraunhofer JA. The estimation of cement film thickness by an in vivo technique. Br Dent J 1971;131:107-11.
- Li JM, Wang WQ, Ma JY. Comparison of the clinical effects of selective laser melting deposition basal crowns and cobalt chromium alloy base crowns. Shanghai Kou Qiang Yi Xue 2014;23:350-3.