Prosthodonic implications and effects of orthognathic surgery on oral functions in the patients with mandibular prognathism

下颌前突患者的修复意义及正颌手术对口腔功能的影响

• 批准号: 04671202
• 负责人: KISHIMOTO Yasuo
• 金额: $ 1.41万
• 依托单位: Aichi-Gakuin University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04671202/
• 关键词: Mandibular prognathism; Light-curing resin; Splint; Sagittal split osteotomy of the mandibular ramus; Jaw jerk reflex; Onset latency; Peak latency; Amplitudes; 下顎枝矢状分割法; 下顎前突症; 外科的矯正; 筋電図; モデリサージェリー

Orthognathic surgery is generally employed for serious mandibular prognathism patients. In the intermaxillary fixation of orthognathic surgery, a splint is usually used due to the ease in determining the position of a segment. Accuracy of the splint effects the positioning of a segment in sagittal split ramus osteotomy. Simple and accurate materials are necessary for a splint. In the first study, we investigated the preparation time and dimensions of three resins (heat-curing, self-curing and light-curing). The test results are that the light-curing resin was the best material of the three for an orthognatic surgery splint. In sagittal split ramus osteotomy, the masseter muscle is detached from the masseric tuberosity so that the length of the masseter muscle may be changed. Furthermore, intermaxillar fixation of about 6 weeks causes the distinct atrophy of the masseter muscle. The purpose of the second study was to examine the influence of these operations on the masseter muscle elect … More romyographically (EMG). While the jaw jerk reflex was evoked by mechanical tap stimulation of the menton, the onset and peak latencies of the responses of the bi-lateral masseter muscles were measured. These latencies were compared between normal subjects and patients with mandibular prognathism before surgery. Changes in these latencies and amplitudes were also examined in patients on three different days after surgery. The results showed no significant difference in the onset and peak latencies between the normal subjects and patients before the surgery. In patients with the surgery, it was found that these latencies and amplitudes did not significantly change after the surgery.In spite of the probable decrease of muscle length and the atrophy of the muscle fibers, no change could be found in either onset and peak latencies or amplitude. This evidence suggests that the muscle spindles may not be influenced by the atrophy of the muscle fibers. The stretch reflex mechanism which remains intact after the surgery is helpful for the patients in acquiring a new jaw position and becoming skillful in oral functions as soon as possible. Less

对于严重的下颌骨多颌畸形患者，通常采用颌外科手术。在正颌外科的颌间固定中，由于易于确定节段的位置，通常使用夹板。在下颌升支矢状劈开截骨术中，夹板的准确性影响节段的定位。简单而精确的材料是制作夹板所必需的。在第一项研究中，我们研究了三种树脂（热固化，自固化和光固化）的制备时间和尺寸。结果表明，光固化树脂是制作正颌外科夹板的最佳材料。在下颌升支矢状劈开截骨术中，咬肌与咬肌粗隆分离，从而改变咬肌的长度。此外，约6周的颌间固定导致咬肌明显萎缩。第二项研究的目的是检查这些手术对咬肌选择的影响， ...更多信息 肌电（EMG）。在机械刺激门顿诱发颌反射的同时，测量双侧咬肌反应的起始和峰值潜伏期。比较正常人和下颌骨多突畸形患者术前的各项指标。还在手术后三个不同的日子检查了患者的这些潜伏期和振幅的变化。结果表明，正常人与术前患者的潜伏期和潜伏期峰值无显著性差异。在手术患者中，发现这些潜伏期和振幅在手术后没有显著变化。尽管肌肉长度可能减少和肌纤维萎缩，但在起始和峰值潜伏期或振幅中没有发现任何变化。这一证据表明，肌梭可能不受肌纤维萎缩的影响。牵张反射机制在手术后仍然保持完整，有助于患者获得新的颌位，并尽快熟练掌握口腔功能。少

项目成果

YASUO KISHIMOTO: "Introduction of Light Curing Resin for Surgical Splint." Maxillofacial Prosthetics. 15(1). 9-14 (1992)

YASUO KISHIMOTO：“用于手术夹板的光固化树脂简介。”

岸本康男: "光重合レジンを用いた外科矯正用スプリントに関する実験的研究" 顎顔面補綴. 15. 9-14 (1992)

Yasuo Kishimoto：“使用光聚合树脂的正畸手术夹板的实验研究”颌面修复学。 15. 9-14 (1992)

岸本 康男: "光重合レジンを用いた外科矯正用スプリントに関する実験的研究" 顎顔面補綴. 15. 9-14 (1992)

Yasuo Kishimoto：“使用光聚合树脂的正畸手术夹板的实验研究”颌面修复学。 15. 9-14 (1992)