Studies on Maintenance Plan for Periodontal Disease in Prosthodontic Treatment for Partially Edenturous Dentition

为明确局部义齿患者义齿修复治疗中牙周病的维护计划，对局部义齿佩戴者基牙牙周组织的临床评价、基牙下软组织塑性变形的临床检查、义齿适合度披露方法的改进、新型衬材的开发进行了研究。腭下黏膜塑性变形的研究1)无压力支撑区粘膜在义齿插入后立即发生肿胀，下后区肿胀高度在3天内达到最大值的80%左右。之后，变化非常缓慢。2)无压力区和有压力区之间边界的清洁度在牙槽嵴区域高，而在该区域的颊缘侧低。义齿适合度揭露方法的改进1)揭露方法通常应用于义齿适合度比较高的地方，在对白硅胶记录的密度分析中，记录最接近区域的适合度超过70%，而低于50%的适合度是不合适的。2)当粘膜静止印模对基面产生不等的支撑载荷时，义齿适合度逐渐下降，而当粘膜功能印模对基面产生等量的支撑载荷时，义齿适合度变化不大。义齿基托衬材料的发展1)义齿基托衬材料提高了义齿的贴合度，但常用的义齿基托材料在制作过程中容易产生刺激性和不良口感。为此，开发了一种新的无刺激性的直接补料法补料材料。2)有许多病例难以准备因底层组织薄而引起疼痛的主诉。对于这些患者，需要在基底表面和软组织之间放置一种有弹性的材料。因此，开发了一种适用于直接补布法的新型弹性补布材料。基牙牙周组织的临床评价1)采用揭露液调查发现牙颊面菌斑沉积程度最小，舌面菌斑沉积明显较多。牙菌斑在靠近牙基的表面沉积最多。2)牙周袋在舌侧和靠近牙根的一侧比颊侧略深。少

To clarify the maintenance plan for periodontal disease in prosthodontic treatment for partially edentulous patients, clinical examination for plastic deformation of underlying soft tissues, improvement of disclosing method for denture fitness, development of new relining material and clinical evaluation of periodontal tissues on the abutment teeth of partial denture wearer were investigated.1. Study on the plastic deformation of underlying palatal mucosa1) Swelling of mucousa membrane in the non-pressure-supporting area are occurred immediately after denture insertion, and the swelling height reaches about 80% of it's maximum value in three days in the lower posterior region. Thereafter, but, it changes very slow.2) A cleanliness of the border between the non-pressure- and pressure-supporting area is high in the alveolar crest region and low in the buccal border side of the area.2. Improvement of disclosing method for denture fitness1) Disclosing method is usually applying on the chec … More king of denture fitness, on the densitmetry anarisis for the record of white silicone, more than 70% of the ratio of the most closest area of the record shows good fitness, however, it is ill-fitting to the ratio of less than 50%.2) The denture fitness goes down gradually when the mucous membrane bears unequal supporting load on the basal surface made by the mucostatic impression, however, it is scarcely change when the mucous membrane bears an equal supporting load on the basal surface made by the the functional impression.3. Development of new relining material1) Relining for the denture base improves denture fitness, however, usual material of the relining makes much irritation and bad taste during preparation. Therefore, a new nonirritating relining material for direct relining method is developed.2) There are many cases difficult to prepare the complaint of pain caused by thin underlying tissues. For these patients, it is needed to seat a resilient material between basal surface and soft tissue. Therefore, a new resilient relining material for direct relining method is developed.4. Clinical evaluation on the periodontal tissues of abutment teeth1) Investigations employing a disclosing solution showed that the smallest degree of plaque deposit occurred on the buccal surface of the teeth and that plaque deposit was clearly greater on the lingual surface. Plaque deposit tended to be greatest on the surface adjacent to the base.2) Periodontal pockets tended to be slightly deeper on the lingual side and the side adjacent to the base than on the buccal side. Less