Gillis I, Redlich M
Department of Orthodontics, Hebrew University-Hadassah, Faculty of Dental Medicine, Jerusalem, Israel.
Am J Orthod Dentofacial Orthop. 1998 Oct;114(4):387-92. doi: 10.1016/s0889-5406(98)70183-0.
With the increasing demand for adult orthodontics, a growing need arises to bond attachments to porcelain surfaces. Optimal adhesion to a porcelain surface should allow orthodontic treatment without bond failure but not jeopardize porcelain integrity after debonding. In this study, 90 glazed porcelain facets were divided into three groups according to different conditioning techniques: (1) roughening with a coarse diamond; (2) hydrofluoric acid 8%; (3) microetching with 60 micron aluminum oxide particles. Each group was divided into three groups and stainless steel brackets were then bonded to the conditioned porcelain with three different dental adhesives. The adhesives used were: (1) silane+Right-On; (2) silane+Concise; (3) High-Q-Bond without silane. Four additional facets (three of which conditioned as above and one intact) were analyzed macroscopically and by scanning electron microscopy. Shear bond strength was measured with an Instron universal testing machine and a macroscopic examination of the debonded porcelain surfaces was performed. Results showed that shear bond strength was highly influenced by both conditioning technique and the adhesive. Shear bond strength of the High-Q-Bond groups was significantly lower than both the silane+Right-On and the silane+Concise groups; nevertheless the shear bond strength achieved by High-Q-Bond was enough to sustain full orthodontic treatment duration (except for the group conditioned by roughening with a coarse diamond). Scanning electronic microscopy analysis revealed that diamond roughening and microetching produced only a surface-peeling pattern, whereas hydrofluoric acid conditioning produced an extensive in-depth penetrating pattern. Hydrofluoric acid preparation produced greater shear bond strength than both diamond roughening and microetching. After debonding by means of a shearing force, the percentage of damaged porcelain surfaces in the silane+Concise groups was significantly higher than the silane+Right-On and High-Q-Bond groups.
随着成人正畸需求的不断增加，将附件粘结到瓷表面的需求也日益增长。对瓷表面的最佳粘结应能使正畸治疗过程中粘结不失败，且在脱粘后不损害瓷的完整性。在本研究中，90个釉质瓷面根据不同的预处理技术分为三组：（1）用粗粒度金刚石打磨；（2）8%氢氟酸处理；（3）用60微米氧化铝颗粒进行微蚀刻。每组再分为三组，然后用三种不同的牙科粘结剂将不锈钢托槽粘结到预处理后的瓷面上。所用粘结剂为：（1）硅烷+Right-On；（2）硅烷+Concise；（3）不含硅烷的High-Q-Bond。另外对四个瓷面（其中三个按上述方法预处理，一个完整）进行了宏观分析和扫描电子显微镜分析。用英斯特朗万能试验机测量剪切粘结强度，并对脱粘后的瓷表面进行宏观检查。结果表明，剪切粘结强度受预处理技术和粘结剂的影响很大。High-Q-Bond组的剪切粘结强度显著低于硅烷+Right-On组和硅烷+Concise组；然而，High-Q-Bond组获得的剪切粘结强度足以维持整个正畸治疗疗程（粗粒度金刚石打磨预处理组除外）。扫描电子显微镜分析显示，金刚石打磨和微蚀刻仅产生表面剥离模式，而氢氟酸预处理产生广泛的深度渗透模式。氢氟酸预处理产生的剪切粘结强度高于金刚石打磨和微蚀刻。通过剪切力脱粘后，硅烷+Concise组中受损瓷表面的百分比显著高于硅烷+Right-On组和High-Q-Bond组。
