Larkin Clark1, Martha H Wells2, Edward F Harris3, Jennifer Lou4. 1. Private practice, West Memphis, Ark., USA. 2. Graduate Pediatric Dentistry Program, Department of Pediatric Dentistry and Community Health, College of Dentistry, University of Tennessee Health Science Center, Memphis, Tenn., USA. mwells@uthsc.edu. 3. Department of Bioscience Research, College of Dentistry, University of Tennessee Health Science Center, Memphis, Tenn., USA. 4. Department of Pediatric Dentistry and Community Health, College of Dentistry, University of Tennessee Health Science Center, Memphis, Tenn., USA.
Abstract
PURPOSE: To determine if aggressiveness of primary tooth preparation varied among different brands of zirconia and stainless steel (SSC) crowns. METHODS: One hundred primary typodont teeth were divided into five groups (10 posterior and 10 anterior) and assigned to: Cheng Crowns (CC); EZ Pedo (EZP); Kinder Krowns (KKZ); NuSmile (NSZ); and SSC. Teeth were prepared, and assigned crowns were fitted. Teeth were weighed prior to and after preparation. Weight changes served as a surrogate measure of tooth reduction. RESULTS: Analysis of variance showed a significant difference in tooth reduction among brand/type for both the anterior and posterior. Tukey's honest significant difference test (HSD), when applied to anterior data, revealed that SSCs required significantly less tooth removal compared to the composite of the four zirconia brands, which showed no significant difference among them. Tukey's HSD test, applied to posterior data, revealed that CC required significantly greater removal of crown structure, while EZP, KKZ, and NSZ were statistically equivalent, and SSCs required significantly less removal. CONCLUSIONS: Zirconia crowns required more tooth reduction than stainless steel crowns for primary anterior and posterior teeth. Tooth reduction for anterior zirconia crowns was equivalent among brands. For posterior teeth, reduction for three brands (EZ Pedo, Kinder Krowns, NuSmile) did not differ, while Cheng Crowns required more reduction.
PURPOSE: To determine if aggressiveness of primary tooth preparation varied among different brands of zirconia and stainless steel (SSC) crowns. METHODS: One hundred primary typodont teeth were divided into five groups (10 posterior and 10 anterior) and assigned to: Cheng Crowns (CC); EZ Pedo (EZP); Kinder Krowns (KKZ); NuSmile (NSZ); and SSC. Teeth were prepared, and assigned crowns were fitted. Teeth were weighed prior to and after preparation. Weight changes served as a surrogate measure of tooth reduction. RESULTS: Analysis of variance showed a significant difference in tooth reduction among brand/type for both the anterior and posterior. Tukey's honest significant difference test (HSD), when applied to anterior data, revealed that SSCs required significantly less tooth removal compared to the composite of the four zirconia brands, which showed no significant difference among them. Tukey's HSD test, applied to posterior data, revealed that CC required significantly greater removal of crown structure, while EZP, KKZ, and NSZ were statistically equivalent, and SSCs required significantly less removal. CONCLUSIONS: Zirconia crowns required more tooth reduction than stainless steel crowns for primary anterior and posterior teeth. Tooth reduction for anterior zirconia crowns was equivalent among brands. For posterior teeth, reduction for three brands (EZ Pedo, Kinder Krowns, NuSmile) did not differ, while Cheng Crowns required more reduction.
Authors: Mebin George Mathew; Korishettar Basavaraj Roopa; Ashu Jagdish Soni; Md Muzammil Khan; Afreen Kauser Journal: J Family Med Prim Care Date: 2020-03-26
Authors: Sara Douf Alzanbaqi; Rakan Mishaal Alogaiel; Mohammed Ali Alasmari; Ahmed Mohammed Al Essa; Layla Nizar Khogeer; Basim Salem Alanazi; Eyad Sami Hawsah; Ahmed Mohammed Shaikh; Maria Salem Ibrahim Journal: Int J Environ Res Public Health Date: 2022-02-28 Impact factor: 3.390