利用口腔内扫描仪对四种冠体的乳磨牙进行体内釉质磨损评价。
In vivo evaluation of the enamel wear of primary molar against four types of crowns using the intra-oral scanner.
机构信息
Pediatric Dentistry Department, Faculty of Dentistry, Mansoura University, Mansoura, Egypt.
出版信息
BMC Oral Health. 2024 Nov 27;24(1):1438. doi: 10.1186/s12903-024-05206-5.
BACKGROUND
Primary tooth wear is a common phenomenon that affects chewing ability, dental sensitivity, aesthetics, and occlusion. This study was conducted to compare the antagonistic enamel wear of primary molars opposed to four different crown materials.
METHODS
Forty lower second primary molars of children aged 4-8 years were allocated into 4 groups: Group 1 (n = 10): received stainless steel crowns; Group 2 (n = 10): received prefabricated commercially available zirconia crowns (NuSmile); Group 3 (n = 10): received locally manufactured zirconia crowns created via the CAD/CAM system; and Group 4 (n = 10): received locally manufactured hybrid ceramic (Vita Enamic) crowns created via the CAD/CAM system. All the crowns were cemented with resin-modified glass ionomer cement. The upper arch was scanned with a 3D intraoral scanner immediately (baseline), 6 months, and 1 year after crown cementation to evaluate the wear of the natural enamel of the antagonistic primary molar. The resultant scans were compared via Exocad software to measure the amount of linear wear of the mesiopalatal cusp of the primary upper second molar.
RESULTS
The analysed data revealed statistically significant differences between the studied groups. The highest mean wear was detected in the CAD/CAM zirconia crown group, followed by the NuSmile zirconia crown group and then the CAD/CAM hybrid crown group, and the lowest mean wear was detected for the stainless-steel crown group.
CONCLUSION
Compared with stainless steel crowns, aesthetic crowns cause more wear in the antagonistic primary molar enamel. CAD/CAM zirconia crowns induce the greatest amount of wear, followed by NuSmile zirconia crowns. The CAD/CAM hybrid crown is an aesthetic tooth-coloured crown that causes less wear of the opposing enamel than zirconia crowns do.
TRIAL REGISTRATION
The ClinicalTrials.gov Protocol Registration and Results System (PRS) has this RCT registered as (NCT06456879) on 07/06/2024.
背景
乳牙磨损是一种常见现象，会影响咀嚼能力、牙齿敏感性、美观和咬合。本研究旨在比较四种不同冠材料对下颌第二乳磨牙的拮抗釉质磨损。
方法
将 40 颗 4-8 岁儿童的下颌第二乳磨牙分为 4 组：第 1 组（n=10）：不锈钢冠；第 2 组（n=10）：预成商用氧化锆冠（NuSmile）；第 3 组（n=10）：CAD/CAM 系统制作的本地制造氧化锆冠；第 4 组（n=10）：CAD/CAM 系统制作的本地制造混合陶瓷（Vita Enamic）冠。所有牙冠均用树脂改良型玻璃离子水门汀粘结。在牙冠粘结后即刻（基线）、6 个月和 1 年，用 3D 口内扫描仪对上颌弓进行扫描，以评估对颌乳磨牙天然釉质的磨损情况。使用 Exocad 软件对扫描结果进行比较，以测量上颌第二乳磨牙近中腭尖的线性磨损量。
结果
分析数据显示，研究组之间存在统计学差异。CAD/CAM 氧化锆冠组的平均磨损量最大，其次是 NuSmile 氧化锆冠组，然后是 CAD/CAM 混合冠组，不锈钢冠组的平均磨损量最小。
结论
与不锈钢冠相比，美观牙冠会导致对颌乳磨牙釉质磨损增加。CAD/CAM 氧化锆冠引起的磨损最大，其次是 NuSmile 氧化锆冠。CAD/CAM 混合冠是一种美观的牙色冠，对釉质的磨损小于氧化锆冠。
试验注册
ClinicalTrials.gov 协议注册和结果系统（PRS）将本 RCT 注册为（NCT06456879）于 2024 年 7 月 6 日。
Zotero 插件