Department of Stomatology, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China.
Beijing Institute of Dental Research, Beijing Stomatological Hospital and School of Stomatology, Capital Medical University, No.4 Tiantanxili, Dongcheng District, Beijing, China.
Am J Dent. 2024 Jun;37(3):121-125.
To evaluate the effect of sandblasting on the microtensile strength between sclerotic dentin and resin composite.
32 premolars with noncarious cervical lesions (NCCLs) were collected, and the teeth were randomly assigned to the control group (C group) and the sandblasted group (S group). Teeth in the S group were sandblasted with 110 µm Al₂O₃ particles at a pressure of 75 psi, while those in the C group received no further treatment. The characteristics of the tooth surface were observed by scanning electron microscopy (SEM), and the relative area of open dentin tubules (OTs) was calculated by IPP6.0 software. Surface roughness (Ra) was also assessed. The noncarious cervical lesions of all teeth were restored with a resin composite and subsequently sectioned into sticks to measure the microtensile bond strength (µTBS).
The mean ± SD µTBS (in MPa) of the sandblasted group was 17.9 ± 0.69 and 14.23 ± 0.44 in the control group (P< 0.05). The relative area of OTs at the gingival wall of the sandblasted group was 69.74 ± 5.23%, and 47.24 ± 7.67% in the control group (P< 0.05). The average surface roughness (µm) was 1.01 ± 0.05 in the sandblasted group and 0.16 ± 0.03 in the control group. Sandblasting could increase the bond strength of sclerotic dentin and resin restorations.
After sandblasting, the microtensile strength of sclerotic dentin on the surface of noncarious cervical lesions increased, prolonging the resin adhesion longevity. Sandblasting could also alleviate the pain of patients during the treatment process and achieve a minimally invasive treatment.
评估喷砂处理对牙本质硬化区和树脂复合材料之间微拉伸强度的影响。
收集 32 颗有非龋性颈壁缺损（NCCLs）的前磨牙，将牙齿随机分配到对照组（C 组）和喷砂组（S 组）。S 组的牙齿用 110 µm Al₂O₃颗粒以 75 psi 的压力喷砂处理，而 C 组则不做进一步处理。用扫描电子显微镜（SEM）观察牙面特征，并通过 IPP6.0 软件计算开放牙本质小管（OTs）的相对面积。还评估了表面粗糙度（Ra）。所有牙齿的非龋性颈壁缺损均用树脂复合材料修复，然后切成棒状以测量微拉伸粘结强度（µTBS）。
喷砂组的平均微拉伸粘结强度（µTBS）（MPa）为 17.9 ± 0.69，对照组为 14.23 ± 0.44（P<0.05）。喷砂组龈壁 OTs 的相对面积为 69.74 ± 5.23%，对照组为 47.24 ± 7.67%（P<0.05）。喷砂组的平均表面粗糙度（µm）为 1.01 ± 0.05，对照组为 0.16 ± 0.03。喷砂处理可以提高牙本质硬化区和树脂修复体的粘结强度。
喷砂处理后，非龋性颈壁缺损表面牙本质硬化区的微拉伸强度增加，延长了树脂的粘结寿命。喷砂处理还可以减轻患者在治疗过程中的疼痛，实现微创治疗。
