Effect of anatomic, semi-anatomic and non-anatomic occlusal surface tooth preparations on the adaptation of zirconia copings
2
조회
0
다운로드
2
인용
0
참고문헌
키워드
초록
PURPOSE. To compare the accuracy of marginal and internal adaptation of zirconia (Zr) copings fabricated on anatomic (A), semi-anatomic (SA) and non-anatomic (NA) occlusal surface preparations. MATERIALS AND METHODS. 45 extracted bicuspid teeth were prepared for receiving zirconia crowns, with different occlusal preparation designs A=15, SA=15 & NA=15. The Zr copings were fabricated by using CAD4DENT, CAD/CAM. The copings were adjusted, cemented and were cross sectioned centrally from buccal cusp tip to lingual cusp tip into mesial and distal halves. The copings were examined under electron microscope at ×200 magnification and the measurements were recorded at 9 predetermined areas in micrometers. RESULTS. Overall mean gap values for the three groups was found to be 155.93±33.98 μm with Anatomical Occlusal preparation design having the least gap value of 139.23±30.85 μm showing the best adaptation among the groups. Post Hoc Tukey’s test showed a statistically significant difference (P=.007) between the means of gap for A & NA preparation designs. Measurements recorded at 9 predetermined points showed variations for the three groups. CONCLUSION. Anatomical occlusal preparation designs resulted in better marginal and internal adaptation of Zr copings. There is a considerable variation between the measured marginal and internal gap values for the Zr copings fabricated by the (CAD4DENT-CAD/CAM). This variation may be associated with the lack of standardization of the preparation of teeth, computerized designing of the coping for each tooth, cement used, uniform pressure application during the cementation of the copings, sectioning of the copings and the microscopic measurements.
Abstract
PURPOSE. To compare the accuracy of marginal and internal adaptation of zirconia (Zr) copings fabricated on anatomic (A), semi-anatomic (SA) and non-anatomic (NA) occlusal surface preparations. MATERIALS AND METHODS. 45 extracted bicuspid teeth were prepared for receiving zirconia crowns, with different occlusal preparation designs A=15, SA=15 & NA=15. The Zr copings were fabricated by using CAD4DENT, CAD/CAM. The copings were adjusted, cemented and were cross sectioned centrally from buccal cusp tip to lingual cusp tip into mesial and distal halves. The copings were examined under electron microscope at ×200 magnification and the measurements were recorded at 9 predetermined areas in micrometers. RESULTS. Overall mean gap values for the three groups was found to be 155.93±33.98 μm with Anatomical Occlusal preparation design having the least gap value of 139.23±30.85 μm showing the best adaptation among the groups. Post Hoc Tukey’s test showed a statistically significant difference (P=.007) between the means of gap for A & NA preparation designs. Measurements recorded at 9 predetermined points showed variations for the three groups. CONCLUSION. Anatomical occlusal preparation designs resulted in better marginal and internal adaptation of Zr copings. There is a considerable variation between the measured marginal and internal gap values for the Zr copings fabricated by the (CAD4DENT-CAD/CAM). This variation may be associated with the lack of standardization of the preparation of teeth, computerized designing of the coping for each tooth, cement used, uniform pressure application during the cementation of the copings, sectioning of the copings and the microscopic measurements.
참고문헌 (33)
- Abduo J., "Fit of zirconia fixed partial denture : a systematic review", J Oral Rehabil, 37, pp.866~876 (2010)
- Beuer F., "Marginal and internal fits of fixed dental prostheses zirconia retainers", Dent Mater, 25, pp.94~102 (2009)
- Beuer F., "Influence of preparation angle on marginal and internal fit of CAD", CAM-fabricated zirconia crown copings, 2009, pp.40, 243~250
- Beuer F., "Precision of fit : zirconia three-unit fixed dental prostheses", Clin Oral Investig, 13, pp.343~349 (2009)
- Colpani JT., "Evaluation of marginal and internal fit of ceramic crown copings", Dent Mater, 29, pp.174~180 (2013)
- Grenade C., "Fit of single tooth zirconia copings : comparison between various manufacturing processes", J Prosthet Dent, 105, pp.249~255 (2011)
- Wettstein F., "Clinical study of the internal gaps of zirconia and metal frameworks for fixed partial dentures", Eur J Oral Sci, 116, pp.272~279 (2008)
- Kohorst P., "Different CAD", CAM-processing routes for zirconia restorations : influence on fitting accuracy, 2011, pp.15, 527~536
- Matta RE., "Circumferential fit assessment of CAD", CAM single crowns-a pilot investigation on a new virtual analytical protocol, 2012, pp.43, 801~809
- Jacobs MS., "An investigation of dental luting cement solubility as a function of the marginal gap", J Prosthet Dent, 65, pp.436~442 (1991)
- McLean JW, "The estimation of cement film thickness by an in vivo technique", Br Dent J, 131, pp.107~111 (1971)
- Boening KW., "Non-cast titanium restorations in fixed prosthodontics", J Oral Rehabil, 19, pp.281~287 (1992)
- Fransson B., "The fit of metal-ceramic crowns, a clinical study", Dent Mater, 1, pp.197~199 (1985)
- Kokubo Y., "Clinical marginal and internal gaps of Procera AllCeram crowns", J Oral Rehabil, 32, pp.526~530 (2005)
- Quintas AF., "Vertical marginal discrepancy of ceramic copings with different ceramic materials, finish lines, and luting agents : an in vitro evaluation", J Prosthet Dent, 92, pp.250~257 (2004)
- Molin MK., "Influence of film thickness on joint bend strength of a ceramic", resin composite joint, 1996, pp.12, 245~249
- Tsukada G., "Film thickness and fluidity of various luting cements determined using a trial indentation meter", Dent Mater, 22, pp.183~188 (2006)
- Moldovan O., "Threedimensional fit of CAD", CAM-made zirconia copings, 2011, pp.27, 1273~1278
- Kohorst P., "Marginal accuracy of four-unit zirconia fixed dental prostheses fabricated using different computer-aided design", computer-aided manufacturing systems, 2009, pp.117, 319~325
- Wakabayashi K., "New evaluation method by microfocus radiograph CT for 3D assessment of internal adaptation of all-ceramic crowns", Dent Mater J, 24, pp.362~367 (2005)
- Gonzalo E., "A comparison of the marginal vertical discrepancies of zirconium and metal ceramic posterior fixed dental prostheses before and after cementation", J Prosthet Dent, 102, pp.378~384 (2009)
- Beuer F., "Influence of preparation angle on marginal and internal fit of CAD", CAM-fabricated zirconia crown copings, 2009, pp.40, 243~250
- Azar MS., "Effect of preparation depth differences on the marginal fit of zirconia crown copings : an in vitro study", Int J Prosthodont, 24, pp.264~266 (2011)
- Renne W., "Predicting marginal fit of CAD", CAM crowns based on the presence or absence of common preparation errors, 2012, pp.108, 310~315
- Oyar P., "Finite element analysis of stress distribution in ceramic crowns fabricated with different tooth preparation designs", J Prosthet Dent, 112, pp.871~877 (2014)
- Motta AB., "Influence of substructure design and occlusal reduction on the stress distribution in metal ceramic complete crowns : 3D finite element analysis", J Prosthodont, 23, pp.381~389 (2014)
- Shillingburg HT., "Fundamentals of fixed prosthodontics", pp.131~148 (2012), Quintessence Pub Co.
- Rosenstiel SF., "Contemporary Fixed Prosthodontics", pp.323~330 (2006), Mosby Elsevier
- Black S., "Measurement of forces applied during the clinical cementation of dental crowns", Physiol Meas, 14, pp.387~392 (1993)
- Quintas AF., "Vertical marginal discrepancy of ceramic copings with different ceramic materials, finish lines, and luting agents : an in vitro evaluation", J Prosthet Dent, 92, pp.250~257 (2004)
- Iwai T., "Influence of convergence angle and cement space on adaptation of zirconium dioxide ceramic copings", Acta Odontol Scand, 66, pp.214~218 (2008)
- Colpani JT., "Evaluation of marginal and internal fit of ceramic crown copings", Dent Mater, 29, pp.174~180 (2013)
- Att W., "Marginal adaptation of three different zirconium dioxide three-unit fixed dental prostheses", J Prosthet Dent, 101, pp.239~247 (2009)