A Novel Open C-shaped Molar Band for Orthodontic Applications: Mechanical Characterizations and Clinical Trials
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2016年第5期
论文作者：周珊 GUO Yang WANG Peijun FU Wei XU Shiqian 张斌
文章页码：1174 - 1180
摘 要：To evaluate the retention properties of the novel ‘C’-shaped molar bands at a laboratory level. Resin-modified glass ionomer cement（RMGIC） was used as a luting agent for the novel C-shaped molar band. The mechanical properties of the band were examined and the retention performance was characterized in the mesial, distal and vertical directions. A clinical trial was conducted using a spilt-mouth design on 50 patients. The novel C-shaped molar bands fit most molars without a repeated try-in process.The use of both nanoHA coating and RMGIC enhanced the tensile（8.00 ± 1.8 MPa） and shear strengths（27.17 ± 8.6 MPa） of the molar bands, leading to high retention in vertical, mesial and distal directions（ p < 0.001）. In clinical trials, the C-shaped molar bands had a failure rate（15%） comparable to that of traditional bands, and 93% of the failed bands demonstrated an adhesive remnant index score of 0, corroborating the observation that no luting agent residue remained on the tooth surface in most cases. The novel C-shaped molar bands appear to be a promising appliance that requires further clinical investigations, and may be used effectively in orthodontics.
周珊1，GUO Yang2，WANG Peijun1，FU Wei1，XU Shiqian3，张斌4
1. Department of Orthodontics, the Second Affiliated Hospital of Harbin Medical University2. Department of Endodontics, the Second Affiliated Hospital of Harbin Medical University3. School of Materials, Science and Engineering of Harbin Institute of Technology4. Department of Implantology, the Second Affiliated Hospital of Harbin Medical University
摘 要：To evaluate the retention properties of the novel ‘C’-shaped molar bands at a laboratory level. Resin-modified glass ionomer cement（RMGIC） was used as a luting agent for the novel C-shaped molar band. The mechanical properties of the band were examined and the retention performance was characterized in the mesial, distal and vertical directions. A clinical trial was conducted using a spilt-mouth design on 50 patients. The novel C-shaped molar bands fit most molars without a repeated try-in process.The use of both nanoHA coating and RMGIC enhanced the tensile（8.00 ± 1.8 MPa） and shear strengths（27.17 ± 8.6 MPa） of the molar bands, leading to high retention in vertical, mesial and distal directions（ p < 0.001）. In clinical trials, the C-shaped molar bands had a failure rate（15%） comparable to that of traditional bands, and 93% of the failed bands demonstrated an adhesive remnant index score of 0, corroborating the observation that no luting agent residue remained on the tooth surface in most cases. The novel C-shaped molar bands appear to be a promising appliance that requires further clinical investigations, and may be used effectively in orthodontics.
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