使用不同功率输出的干法与湿法 Er,Cr:YSGG 激光剥离二硅酸锂贴面的效率。

IF 4.3 2区 医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE Journal of Prosthetic Dentistry Pub Date : 2024-09-30 DOI:10.1016/j.prosdent.2024.09.008
Soha Raafat, Maged Zohdy, Mohamed Eldemellawy, Rami Ghali, Doaa Taha
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引用次数: 0

摘要

问题简介:由于水是铒铬钇钪镓石榴石(Er,Cr:YSGG)激光的发色团,因此到达修复部位的激光能量会因部分能量被水吸收而降低。从理论上讲,减少水分或采用干法剥离可以减少水分消耗的能量,从而提高激光效率。目的:这项体外研究的目的是评估使用不同功率输出的 Er,Cr:YSGG激光进行湿法和干法脱粘时,贴面的脱粘时间、膜内温度和透光度:将 63 颗上颌中切牙的唇侧压平,以接受陶瓷试样。粘结后,用 Er,Cr:YSGG 激光器照射陶瓷试样,使用不同的功率输出和水百分比进行脱粘处理(N=70):子组 A1,4 瓦和 1%的水;A20,4 瓦和 20%的水;A40,4 瓦和 40%的水;B1,5 瓦和 1%的水;B20,5 瓦和 20%的水;B40,5 瓦和 40%的水;C1,6 瓦和 1%的水;C20,6 瓦和 20%的水;C40,6 瓦和 40%的水。在脱粘过程中,评估了温升和脱粘时间,然后评估了脱粘试样的半透明度和表面形貌。数据分析采用了双向方差分析(ANOVA)和邓尼特检验(α=.05):结果:B 组和 C 组(PConclusions.Dry Er,Cr:YSGG)之间的平均管内温升差异显著:干法Er,Cr:YSGG激光剥脱在使用高功率输出时会导致髓内温度升高,但不会超过牙髓温度的临界阈值。干法脱粘也限制了激光能量的传输,影响了脱粘效率。如果打算重新使用二硅酸锂贴面,5 W 的功率输出和 20% 的水份可被视为高效、安全的脱粘激光参数。
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Efficiency of dry versus wet Er,Cr:YSGG laser debonding of lithium disilicate veneers using different power outputs.

Statement of problem: Since water is the chromophore for the erbium, chromium-yttrium scandium gallium garnet (Er,Cr:YSGG) laser, the laser energy reaching the restoration decreases as part of it is absorbed by water. Theoretically, reducing the water or implementing dry debonding could reduce the energy consumed by water, increasing laser efficiency. Studies on whether it is suitable for removing veneers without using coolant are lacking.

Purpose: The purpose of this in vitro study was to evaluate the debonding time, intrapulpal temperature, and translucency of veneers during wet versus dry debonding with an Er,Cr:YSGG laser using different power outputs.

Material and methods: Sixty-three maxillary central incisors were flattened labially to receive ceramic specimens. After cementation, ceramic specimens were irradiated with an Er,Cr:YSGG laser for debonding with different power outputs and water percentages (N=70): subgroup A1, 4 W and 1% water; A20, 4 W and 20% water; A40, 4 W and 40% water; B1, 5 W and 1% water; B20, 5 W and 20% water; B40, 5 W and 40% water; C1, 6 W and 1% water; C20, 6 W and 20% water; C40, 6 W and 40% water, and a control group of unbonded ceramic specimens. During debonding, the temperature rise and debonding time were evaluated, followed by the evaluation of the translucency and surface topography of the debonded specimens. Two-way analysis of variance (ANOVA) and the Dunnett test were used to analyze the data (α=.05).

Results: The mean intrapulpal temperature rise varied significantly among groups B and C (P<.001), with the highest mean temperature rise found in subgroup B1 (4.00 ±0.00 ºC) and the lowest mean temperature rise in subgroup C20 (1.20 ±0.45 ºC). For the debonding time, the mean values of time required for debonding varied significantly among different groups (P<.001), with the longest time recorded in subgroup A1 (333.4 ±74.8 s) and the shortest time recorded in subgroup C20 (17.0 ±6.0 s). Only subgroups C1 (18.89 ±0.2) and C40 (18.60 ±0.2) showed a significantly lower translucency than the control group (19.44 ±0.06) (P<.001).

Conclusions: Dry Er,Cr:YSGG laser debonding resulted in increased intrapulpal temperature when using high power outputs, but without exceeding the critical threshold of dental pulp temperature. Dry debonding also limited the transmission of laser energy, affecting the debonding efficiency. A power output of 5 W and 20% water can be considered efficient and safe laser parameters for debonding lithium disilicate veneers if their reuse is intended.

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来源期刊
Journal of Prosthetic Dentistry
Journal of Prosthetic Dentistry 医学-牙科与口腔外科
CiteScore
7.00
自引率
13.00%
发文量
599
审稿时长
69 days
期刊介绍: The Journal of Prosthetic Dentistry is the leading professional journal devoted exclusively to prosthetic and restorative dentistry. The Journal is the official publication for 24 leading U.S. international prosthodontic organizations. The monthly publication features timely, original peer-reviewed articles on the newest techniques, dental materials, and research findings. The Journal serves prosthodontists and dentists in advanced practice, and features color photos that illustrate many step-by-step procedures. The Journal of Prosthetic Dentistry is included in Index Medicus and CINAHL.
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