PDF(Pubmed)
Abstract：
UNASSIGNED: This prospective study evaluated the effects of the metal-free crowns on the periodontal tissues of abutment teeth during a 12-month follow-up.
UNASSIGNED: A sample of 24 patients (N = 32 abutment teeth) who needed a single-tooth restoration were enrolled to receive either a metal-ceramic (n = 21) or lithium disilicate (n = 11). The single-unit crowns were evaluated at baseline, 3-and 12-month follow-up. The periodontal parameters were evaluated: plaque index (PI), gingival bleeding index (GBI), bleeding on probing (BOP), probing depth (PD), clinical attachment loss (CAL), radiographically and clinical crown fitting, bone resorption, and marginal finish lines. Statistical analyses were performed using the Exact Fisher and Mann-Whitney tests, and the Wilcoxon signed-rank test as a post hoc test for Friedman (95 % confidence interval).
UNASSIGNED: The marginal finish line showed a statistical difference with a biomaterial type (p =.004). After a 12-months, a significant increase was observed in PI and mean PD for abutment teeth of metal-ceramic crowns. The metal-free crowns presented higher values for GBI and CAL (p2 < 0.05). Only distal cervical evaluation and dental biofilm formation in the abutment teeth showed a statistical difference between the groups at the 12-month follow-up. The supragingival margin metal-ceramic group revealed higher PI values (p2 = 0.005) between the period and the subgingival margin of both biomaterials showed greater GBI scores (p2 < 0.05).
UNASSIGNED: Metal-free crowns showed better periodontal outcomes compared to metal-ceramic crowns. Single-unit crown marginal location affects the periodontal tissue condition of the abutment teeth. The marginal fit was not changed regarding the biomaterial type.
UNASSIGNED: A sample of 24 patients (N = 32 abutment teeth) who needed a single-tooth restoration were enrolled to receive either a metal-ceramic (n = 21) or lithium disilicate (n = 11). The single-unit crowns were evaluated at baseline, 3-and 12-month follow-up. The periodontal parameters were evaluated: plaque index (PI), gingival bleeding index (GBI), bleeding on probing (BOP), probing depth (PD), clinical attachment loss (CAL), radiographically and clinical crown fitting, bone resorption, and marginal finish lines. Statistical analyses were performed using the Exact Fisher and Mann-Whitney tests, and the Wilcoxon signed-rank test as a post hoc test for Friedman (95 % confidence interval).
UNASSIGNED: The marginal finish line showed a statistical difference with a biomaterial type (p =.004). After a 12-months, a significant increase was observed in PI and mean PD for abutment teeth of metal-ceramic crowns. The metal-free crowns presented higher values for GBI and CAL (p2 < 0.05). Only distal cervical evaluation and dental biofilm formation in the abutment teeth showed a statistical difference between the groups at the 12-month follow-up. The supragingival margin metal-ceramic group revealed higher PI values (p2 = 0.005) between the period and the subgingival margin of both biomaterials showed greater GBI scores (p2 < 0.05).
UNASSIGNED: Metal-free crowns showed better periodontal outcomes compared to metal-ceramic crowns. Single-unit crown marginal location affects the periodontal tissue condition of the abutment teeth. The marginal fit was not changed regarding the biomaterial type.
摘要：
■这项前瞻性研究评估了无金属牙冠在12个月的随访中对基牙牙周组织的影响。
■24例需要单齿修复的患者（N=32个基牙）被纳入接受金属陶瓷（n=21）或二硅酸锂（n=11）的样本。在基线时评估单单元冠，3个月和12个月的随访。评估牙周参数：菌斑指数（PI），牙龈出血指数（GBI），探查出血(BOP),探测深度(PD),临床附着丧失(CAL)，影像学和临床冠配件，骨吸收，和边缘终点线。使用精确的Fisher和Mann-Whitney检验进行统计分析，和Wilcoxon符号秩检验作为弗里德曼的事后检验(95%置信区间)。
■边缘终点线显示出与生物材料类型的统计学差异（p=.004）。12个月后,金属陶瓷牙冠基牙的PI和平均PD显着增加。对于GBI和CAL,无金属冠部呈现较高的值(p2<0.05)。在12个月的随访中，仅颈椎远端评估和基牙中的牙体生物膜形成显示出两组之间的统计学差异。在此期间，牙龈上边缘金属陶瓷组显示出更高的PI值（p2=0.005），两种生物材料的牙龈下边缘显示出更高的GBI评分（p2<0.05）。
■与金属陶瓷冠相比，无金属冠显示出更好的牙周结局。单个单元冠边缘位置影响基牙的牙周组织状况。关于生物材料类型的边际拟合没有改变。
■24例需要单齿修复的患者（N=32个基牙）被纳入接受金属陶瓷（n=21）或二硅酸锂（n=11）的样本。在基线时评估单单元冠，3个月和12个月的随访。评估牙周参数：菌斑指数（PI），牙龈出血指数（GBI），探查出血(BOP),探测深度(PD),临床附着丧失(CAL)，影像学和临床冠配件，骨吸收，和边缘终点线。使用精确的Fisher和Mann-Whitney检验进行统计分析，和Wilcoxon符号秩检验作为弗里德曼的事后检验(95%置信区间)。
■边缘终点线显示出与生物材料类型的统计学差异（p=.004）。12个月后,金属陶瓷牙冠基牙的PI和平均PD显着增加。对于GBI和CAL,无金属冠部呈现较高的值(p2<0.05)。在12个月的随访中，仅颈椎远端评估和基牙中的牙体生物膜形成显示出两组之间的统计学差异。在此期间，牙龈上边缘金属陶瓷组显示出更高的PI值（p2=0.005），两种生物材料的牙龈下边缘显示出更高的GBI评分（p2<0.05）。
■与金属陶瓷冠相比，无金属冠显示出更好的牙周结局。单个单元冠边缘位置影响基牙的牙周组织状况。关于生物材料类型的边际拟合没有改变。
