Effect of core design on fracture resistance of zirconia-lithium disilicate anterior bilayered crowns
2
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
PURPOSE. The effect of core design on the fracture resistance of zirconia-lithium disilicate (LS2) bilayered crowns for anterior teeth is evaluated by comparing with that of metal-ceramic crowns. MATERIALS AND METHODS. Forty customized titanium abutments for maxillary central incisor were prepared. Each group of 10 units was constructed using the same veneer form of designs A and B, which covered labial surface to approximately one third of the incisal and cervical palatal surface, respectively. LS2 pressed-on-zirconia (POZ) and porcelain-fused-to-metal (PFM) crowns were divided into “POZ_A,” “POZ_B,” “PFM_A,” and “PFM_B” groups, and 6000 thermal cycles (5/55 C) were performed after 24 h storage in distilled water at 37 C. All specimens were prepared using a single type of self-adhesive resin cement. The fracture resistance was measured using a universal testing machine. Failure mode and elemental analyses of the bonding interface were performed. The data were analyzed using Welch’s t-test and the Games-Howell exact test. RESULTS. The PFM_B (1376. 8 ± 93.3 N) group demonstrated significantly higher fracture strength than the PFM_A (915.8 ± 206.3 N) and POZ_B (963.8 ± 316.2 N) groups (P<.05). There was no statistically significant difference in fracture resistance between the POZ_A (1184.4 ± 319.6 N) and POZ_B groups (P>.05). Regardless of the design differences of the zirconia cores, fractures involving cores occurred in all specimens of the POZ groups. CONCLUSION. The bilayered anterior POZ crowns showed different fracture resistance and fracture pattern according to the core design compared to PFM.
Abstract
PURPOSE. The effect of core design on the fracture resistance of zirconia-lithium disilicate (LS2) bilayered crowns for anterior teeth is evaluated by comparing with that of metal-ceramic crowns. MATERIALS AND METHODS. Forty customized titanium abutments for maxillary central incisor were prepared. Each group of 10 units was constructed using the same veneer form of designs A and B, which covered labial surface to approximately one third of the incisal and cervical palatal surface, respectively. LS2 pressed-on-zirconia (POZ) and porcelain-fused-to-metal (PFM) crowns were divided into “POZ_A,” “POZ_B,” “PFM_A,” and “PFM_B” groups, and 6000 thermal cycles (5/55 C) were performed after 24 h storage in distilled water at 37 C. All specimens were prepared using a single type of self-adhesive resin cement. The fracture resistance was measured using a universal testing machine. Failure mode and elemental analyses of the bonding interface were performed. The data were analyzed using Welch’s t-test and the Games-Howell exact test. RESULTS. The PFM_B (1376. 8 ± 93.3 N) group demonstrated significantly higher fracture strength than the PFM_A (915.8 ± 206.3 N) and POZ_B (963.8 ± 316.2 N) groups (P<.05). There was no statistically significant difference in fracture resistance between the POZ_A (1184.4 ± 319.6 N) and POZ_B groups (P>.05). Regardless of the design differences of the zirconia cores, fractures involving cores occurred in all specimens of the POZ groups. CONCLUSION. The bilayered anterior POZ crowns showed different fracture resistance and fracture pattern according to the core design compared to PFM.
참고문헌 (25)
- Sicilia A, "Long-term stability of peri-implant tissues after bone or soft tissue augmentation. Effect of zirconia or titanium abutments on peri-implant soft tissues. Summary and consensus statements. The 4th EAO consensus conference 2015", Clin Oral Implants Res, 26, pp.148~152 (2015)
- Al-Amleh B, "Clinical trials in zirconia : A systematic review", J Oral Rehabil, 37, pp.641~652 (2010)
- Sevcan Kurtulmus-Yilmaz, "Comparison of the translucency of shaded zirconia all-ceramic systems", The Journal of Advanced of Prosthodontics, 6(5), pp.415~422 (2014), 대한치과보철학회[DOI]
- McLaren EA, "Zirconia-based ceramics:Material properties, esthetics, and layering techniques of a new veneering porcelain, VM9", Quintessence Dent Technol, 28, pp.100~ (2005)
- Näpänkangas R, "Outcome of zirconia single crowns made by predoctoral dental students: A clinical retrospective study after 2 to 6 years of clinical service", J Prosthet Dent, 113, pp.289~294 (2015)
- Håff A, "A retrospective evaluation of zirconia-fixed partial dentures in general practices : An up to 13-year study", Dent Mater, 31, pp.162~170 (2015)
- Pihlaja J, "Outcome of zirconia partial fixed dental prostheses made by predoctoral dental students: A clinical retrospective study after 3 to 7 years of clinical service", J Prosthet Dent, 116, pp.40~46 (2016)
- Solá-Ruíz MF, "A prospective evaluation of zirconia anterior partial fixed dental prostheses : Clinical results after seven years", J Prosthet Dent, 113, pp.578~584 (2015)
- Chaar MS, "Ten-year clinical outcome of three-unit posterior FDPs made from a glass-infiltrated zirconia reinforced alumina ceramic(In-ceram zirconia)", J Dent, 43, pp.512~517 (2015)
- Heintze SD, "Survival of zirconia-and metal-supported fixed dental prostheses : A systematic review", Int J Prosthodont, 23, pp.493~502 (2010)
- Ayse Gozde Turk, "Effect of different veneering techniques on the fracture strength of metal and zirconia frameworks", The Journal of Advanced of Prosthodontics, 7(6), pp.454~459 (2015), 대한치과보철학회[DOI]
- 최재원, "In vitro study of the fracture resistance of monolithic lithium disilicate, monolithic zirconia, and lithium disilicate pressed on zirconia for three-unit fixed dental prostheses", The Journal of Advanced of Prosthodontics, 9(4), pp.244~251 (2017), 대한치과보철학회[DOI]
- Lim CH, "Evaluation of fracture strength for single crowns made of the different types of lithium disilicate glass-ceramics", Odontology, 108, pp.231~239 (2020)
- Kim JH, "Effects of the thickness ratio of zirconia-lithium disilicate bilayered ceramics on the translucency and flexural strength", J Prosthodont, 29, pp.334~340 (2020)
- Wang G, "Effect of thickness ratio on loadbearing capacity of bilayered dental ceramics", J Prosthodont, 24, pp.17~24 (2015)
- Wang G, "Interface toughness of a zirconia-veneer system and the effect of a liner application", J Prosthet Dent, 112, pp.576~583 (2014)
- Yoon HI, "Effect of various intermediate ceramic layers on the interfacial stability of zirconia core and veneering ceramics", Acta Odontol Scand, 73, pp.488~495 (2015)
- Kim SH, "Evaluation of the ceramic liner bonding effect between zirconia and lithium disilicate", J Prosthet Dent, 120, pp.282~289 (2018)
- Lee ES, "Effect of silica-containing glass-ceramic liner treatment on zirconia coping retention", J Prosthet Dent, 120, pp.732~739 (2018)
- Lee YH, "Effects of lithium and phosphorus on the efficacy of a liner for increasing the shear bond strength between lithium disilicate and zirconia", J Adhes Dent, 20, pp.535~540 (2018)
- 조은혜, "Effect of liners and primers on tensile bond strength between zirconia and resin-based luting agent", The Journal of Advanced of Prosthodontics, 10(5), pp.374~380 (2018), 대한치과보철학회[DOI]
- Jeong ID, "Translucency of zirconia-based pressable ceramics with different core and veneer thicknesses", J Prosthet Dent, 115, pp.768~772 (2016)
- Sinmazisik G, "The effect of zirconia thickness on the biaxial flexural strength of zirconiaceramic bilayered discs", Dent Mater J, 34, pp.640~647 (2015)
- Woods JA, "Effects of porcelain-metal junction angulation on porcelain fracture", J Prosthet Dent, 54, pp.501~503 (1985)
- Hobo S, "Porcelain fused to metal : Tooth preparation and coping design", J Prosthet Dent, 30, pp.28~36 (1973)