Venugopalan V, Satheesh G, Balatandayoudham A, Duraimurugan S, Balaji T S
Department of Oral and Maxillofacial Surgery, Indira Gandhi Institute of Dental Sciences, Puducherry, India.
Ann Maxillofac Surg. 2020 Jul-Dec;10(2):287-291. doi: 10.4103/ams.ams_20_20. Epub 2020 Nov 4.
Erich arch bar used for maxillomandibular fixation (MMF) since decades has several disadvantages such as risks of injury, additional operating room time, and gingival trauma. To overcome these downsides, modified Erich arch bar was introduced; however, there is not much available literature, indicating the efficacy of modified Erich arch bar over that of conventional arch bar wire. Therefore, the present study focuses on comparing efficiency of modified arch bar with conventional arch bar.
This comparative randomized study was conducted on 32 patients that required MMF and were divided into Group A patients who received intermaxillary fixation (IMF) with modified Erich arch bars and Group B patients with conventional Erich arch bars. The parameters recorded were average surgical time required, wire prick injuries, IMF stability, occlusal stability, screw loosening, oral hygiene status, and vitality response of the teeth. The variables were statistically analyzed using Student's -test and Wilcoxon signed-rank test.
The wire prick injury, intraoperative time noted in Group A was significantly reduced in comparison to Group B ( < 0.0001). Debris indices were significantly good in Group A in comparison to Group B ( < 0.0001). Nonvitality response of tooth was significantly more in Group B than in Group A patients ( < 0.05).
The efficiency of modified Erich arch bar group was superior to the conventional arch bar with very limited restrictions.
几十年来一直用于上颌下颌固定（MMF）的埃里希牙弓夹板有几个缺点，如存在受伤风险、增加手术室时间以及牙龈创伤。为克服这些缺点，引入了改良的埃里希牙弓夹板；然而，现有文献不多，表明改良的埃里希牙弓夹板比传统牙弓夹板丝更有效。因此，本研究着重比较改良牙弓夹板与传统牙弓夹板的效率。
本比较随机研究对32例需要MMF的患者进行，分为A组，接受改良埃里希牙弓夹板进行颌间固定（IMF）的患者，以及B组，使用传统埃里希牙弓夹板的患者。记录的参数有所需的平均手术时间、钢丝刺伤、IMF稳定性、咬合稳定性、螺钉松动、口腔卫生状况以及牙齿的活力反应。使用学生t检验和威尔科克森符号秩检验对变量进行统计学分析。
与B组相比，A组记录的钢丝刺伤和术中时间显著减少（P<0.0001）。与B组相比，A组的碎屑指数显著更好（P<0.0001）。B组患者牙齿的无活力反应明显多于A组患者（P<0.05）。
改良埃里希牙弓夹板组的效率优于传统牙弓夹板组，且限制非常有限。
