部分床義歯の予後に関する臨床的研究 (II) : 第2報部分床義歯の使用状態について

概要

論文の詳細を見る
In order to estimate the long-term clinical effects of wearing partial dentures, the authors undertook follow-up on 2140 dentures with which 1564 patients were fitted at Tokyo Medical and Dental University. Clinical examinations were performed at the time when the dentures were inserted. Six months to five and a half years thereafter a questionnaire was sent out to each case to ask several simple questions on the dentures, and to attend for re-examination. 1158 cases replied to the questionnaires, and 772 of them appeared for re-examination. As based on the results derived chiefly from the replies to the questionnaires, the following conclusions were drawn : 1. The patients were asked if they were wearing their dentures. The 28.03 percent of examined partial dentures were discarded. In these examined dentures the 21.78 percent of the dentures made of cast cobalt-chromium or gold alloy skeleton with acrylic resin saddles were discarded, and also the 32.56 percent of dentures in acrylic resin with clasps and bars in wrought metal discarded. The rate of discarded dentures in the former was remarkably higher than in the later, and the chi-square test at 5 percent level showed a significant difference between them. But in the rate of discarded dentures was no discrepancy between maxillary and mandibular dentures, among dentures provided for patients of different ages, and between those of men and women. The rate of discarded dentures remained about 10 percent for a year and a half after the examined dentures were inserted. But afterwards it increased to 30 percent after three years and three months following their insertion. And it approached 40 percent after four years and nine months. Furthermore it increased rapidly to 64 percent after five years and three months. In unilateral free-end posterior dentures, unilateral bounded posterior dentures and unilateral combined posterior dentures, the rate of discarded dentures reached 30 percent as early as two years after they were inserted. But in bilateral combined posterior dentures the rate increased to 30 percent after three years following their insertion, and in both bilateral free-end posterior denturesand bilateral bounded posterior dentures, it rose rather slower to 30 percent until fourth year. With the exception of unilateral combined anterior and posterior dentures in which the rate rose to 30 percent after three years, the rate of anterior and posterior dentures increased considerablys lower to 30 percent. Namely the rate of bilateral combined anterior and posterior dentures reached 30 percetat after four years. In both bilateral free-end anterior and posterior dentures, and bilateral bounded anterior and posterior dentures, it increased to 30 percent until fifth year. In unilateral free-end anterior and posterior dentures, and in unilateral bounded anterior and posterior dentures, the rate of discarded dentures did not reach to 30 percent within five years following their insertion, although a small number of them. 2. In 7.76 percent of the constantly worn dentures, aesthetic effects of dentures were dissatisfied by the wearers. Approximate 10 percent of them showed the insufficiency of mastication and pronounciation. In 10.14 percent of the constantly worn dentures the abutment teeth became so movable that the patient could move them with his tongue. The retention and the stability of 11. 58 percent dentures were found to be rather poor. Denture fractures occured in 21.17 percent of the worn dentures, and some of them had been repaired. The constantly worn dentures were divided according to their materials into the appliances made of cast metal skeleton with acrylic resin saddles and those in acrylic resin with clasps and bars in wought metal. With the exception of the insufficiency of mastication the above-mentioned severe side effects of the former were significantly in a less degree than those of the later. 3. As already described the 28.03 percent of examined dentures were discarded for diverse causes. The most frequent cause was the denture fracture. It was found in 29.32 percent of the discarded dentures, especially in 32.61 percent of discarded acrylic resin dentures. Secondly, poor retention and instability of dentures occured in 24.43 percent. The other causes were arranged in order of their frequency : The carious destruction or missing of abutment teeth in 22.48 percent of the discarded dentures, the pain in 10.75 percent, and the incomfortableness of wearing dentures in 5.86 percent. In two years after the dentures were inserted, both of the pain and the incomfortalcleness together were as frequent as 31 percent for the dentures being discarded. But in the periecl from third year to fifth year they decreased to 10 percent. On the contrary the carious destruction and missing of abutment teeth increased from 10 percent to about 30 percent in the same period. 4. One hundred and seventy of 295 cases who discarded their dentures, were wearing the newly constructed dentures, but 125 cases, namely 42.37 percent of them, were not at all wearing the new dentures. The 26.55 percent of the cases discarding maxillary dentures, and the 47.75 percent of those discarding mandibular dentures were never wearing the new dentures. The difference between them was statistically significant. And we found a distinct difference between the cases who had worn the dentures before insertion of the examined dentures and those having not worn them. In the rate of cases not wearing dentures the later exceeded significantly the former. The rate of cases never wearing dentures became higher according as the remaining teeth increased. Namely all of the cases having one or two remaining teeth were wearing the newdentures. But 50 to 70 percent of the cases having twelve to fourteen remaining teeth were not at all wearing the dentures. The cases of the anterior dentures showed the lower rate of cases never wearing dentures than those of the posterior dentures. Obviously aesthetics played acausative role in encouraging the patient to wear the denture. But in the rate of cases never wearing dentures was no significant difference between men and women, and also anaong patients of different ages.
日本補綴歯科学会の論文
1968-07-31

部分床義歯の予後に関する臨床的研究 (II) : 第2報部分床義歯の使用状態について

スポンサーリンク

概要

著者

関連論文

スポンサーリンク

部分床義歯の予後に関する臨床的研究 (II) : 第2報 部分床義歯の使用状態について

スポンサーリンク

概要

著者

関連論文

スポンサーリンク

部分床義歯の予後に関する臨床的研究 (II) : 第2報部分床義歯の使用状態について