A Study of Porcelain Fused to Ni-Cr-Co System Alloy. Part VI. Clinical evaluation for crown and bridge

One of the authors, Ito (1976), reported on the application of the plasma spray coating method for the dental restorations, and discussed about bonding strength of porcelain fused to non-precious metal. The technique consists of coating the surface of Ni-Cr-Co system alloy restorations with Al_2O_3 or ZrO_2 powders by plasma spraying. He suggested that the bonding strength of porcelain fused to non-precious metal by this method was larger than that of porcelain fused to precious metal by conventional crown and bridge laboratory procedures. We have applied this technique to the crown and bridge and these were observed about for 16 months. From the results of this observation, the following conclusions were obtained. 1) The margin of castings were fitted well for the prepared teeth in all of 13 cases. 2) In almost all cases, we were not observed the periodontal deseases. 3) Positive problems were not found any variation of coating method. 4 ) There were not observed attrition, wearing, cracking, and destruction during 16 months after cementation

Spectrophotometric Analysis of Dental Porcelain and Hard-resin for Crown and Bridge

Dental hard-resin have been used actively for facing metal crown restorations in recent years. However, dental hard-resin is not as good as dental porcelain in color reproductability. We measured spectral absorption and scattering coefficients of Kuraray-Cesead-hard-resin by the microspectrophotometric-method. Spectral absorption and scattering coefficients were compared using Kuraray-Cesead-hard-resin to Noritake-Super-Porcelain-AAA. The results were as follows; 1) The color of hard-resin depended on its thickness more than color of porcelain. 2) Transmittance of light on hard-resin was very high and depended on wavelength of light. Especially, nondiffused transmittance of Transparent-Hard-resin was high. Therefore, color of the under layers changed according to thickness of upper layers and color of surface depended directly on the color of under layers. 3) The color reproductability of dental hard-resin was not to the same level as dental porcelain

Assistant for the patients of home health care in naso pharyngeal field-The effectiveness of interviews for the outpatients by nurses-

耳鼻咽喉科領域における外来面接中の患者31名に対して問題点を整理分析し，面接開始後3年間の看護婦による介入方法について検討した。外来面接指導における問題点は心理，失声，栄養，呼吸，気管孔，疼痛，排泄，清潔，家族に関するもの，その他の10項目に分類できた．患者1人の平均訴え個数は5.0個でありそのうち95.4％が面接により改善した．また，退院時に医師が捉えた問題点数（18個）6名と外来面接時に患者が訴えた問題点数（156個）31名とに差が見られ看護婦による介入の必要性が示唆された．殆どの問題に永久気管孔による失声が影響していると考えられ，永久気管孔形成患者に対しては患者と共にキーパーソンヘの支援の必要性が明確になった