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Please use this identifier to cite or link to this item: http://repository.li.mahidol.ac.th/dspace/handle/123456789/933
Title: Clinical performance and wear characteristics of veneered lithia-disilicate-based ceramiccrowns.
Authors: Kallaya Suputtamongkola
Anusavice, Kenneth J.
Chatcharee Suchatlamponga
Phira Sithiamnuaia
Chantana Tulapornchai
กัลยา ศุพุทธมงคล
ชัชรี สุชาติล้ำพงศ์
พีระ สิทธิอำนวย
ฉันทนา ตุลาพรชัย
Kallaya Suputtamongkol
กัลยา ศุพุทธมงคล
Keywords: Characteristics;Clinical performance;Ceramic;Open Access article
Issue Date: May-2008
Citation: Suputtamongkol K, Anusavice KJ, Suchatlampong C, Sithiamnuai P, Tulapornchai C. Clinical performance and wear characteristics of veneered lithia-disilicate-based ceramic crowns. Dent Mater. 2008 May;24(5):667-73.
Abstract: Objectives. The objectives of this study were to characterize the clinical performance and wear characteristics of lithia-disilicate-based ceramic crowns. Methods. Thirty posterior crowns were made using the heat-pressing technique and lithiadisilicate- based core ceramic. Subjects were recalled annually. The quality of crowns and adjacent gingival tissueswere examined using nine criteria for acceptability. All crownswere examined and ranked from 4 (Excellent) to 1 (Unacceptable) for each criterion. Impressions were made for replica models at each appointment. Wear characteristics of dental ceramic and enamelwere obtained by comparing the surface of the original model with the follow-up model using a laser scanner. Results. Twenty-nine subjects returned for the 1-year recall examination. The maximum clenching force for the 30 subjects ranged from 125 to 815N. All clinical criteria were ranked good to excellent at the 1-year recall exam and no fractures were observed. The mean occlusal wear volumes for the ceramic crowns after 1 year were 0.19 (0.065)mm3 for premolar sites and 0.34 (0.08)mm3 for molar sites. The mean occlusal wear volumes of opposing enamel after 1 year were 0.21 (0.06)mm3 for premolar teeth and 0.50 (0.22)mm3 for molar teeth. The mean occlusal wear volume of ceramic molar crowns was significantly lower than the volume of enamel wear of the opposing teeth (p?0.05). Conclusions. The quality of the overall prostheses and the gingival tissues were acceptable after 1 year. The mean occlusal wear volume of ceramic molar crowns was significantly lower than the enamel wear volume of the opposing teeth.
URI: http://repository.li.mahidol.ac.th/dspace/handle/123456789/933
ISSN: 0109-5641 (printed)
1879-0097 (electronic)
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