摘要:

SummaryStimulus‐response latencies of low‐frequency transcutaneous electrical neuromuscular stimulation (TENS) were studied in 15 healthy subjects, applying the two different pulse configurations delivered by the Biotens and the Myomonitor instruments. Latencies, in milliseconds, were determined on bipolar raw surface electromyograms (EMG) of the suprahyoid muscles, using the skin surface over the sigmoid notches of the mandible as the site of stimulation. Stimulus‐response times were measured from the onset of the stimulus artefact to the first response peak on EMG, and their mean values showed ranges of 3.79–4.49 ms for Biotens and 5.10–5.34 ms for Myomonitor. It was concluded that low‐frequency TENS caused direct stimulation of motor nerves, and that the timing of the contraction response was not affected by altered electrode placement, lead‐wire reversal or unbalanced (right/left

ISSN:0305-182X    

DOI:10.1111/j.1365-2842.1991.tb00034.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

摘要:

SummaryThe aim of this study was to determine the periodontal status in relation to the quality of the adjacent proximal tooth surface. The gingival index (GI) and probable pocket depth (PD) were measured in 144 contra‐lateral pairs of sound vs. restored and 95 contra‐lateral pairs of sound vs. carious surfaces in 124 patients. The restorations studied were silver amalgams and tooth‐coloured filling materials, the margins of which were supragingival or level with the gingival margins. The results showed that the GI and PD were greater for both restored and carious tooth surfaces than for the contra‐lateral sound surfaces. When all the teeth were grouped together, the differences in the mean values of GI and PD were statistically significant at the P≤0.05 level. A comparison between restored and carious (non‐paired) tooth surfaces revealed higher mean values of GI and PD for the latter, which were highly significant at the P<0.001 level. Thus the present study shows that proximal tooth surface quality influences the health status of the adjacent p

ISSN:0305-182X    

DOI:10.1111/j.1365-2842.1991.tb00035.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY

ISSN:0305-182X    

DOI:10.1111/j.1365-2842.1991.tb00036.x

出版商:Blackwell Publishing Ltd    

年代:1991

数据来源: WILEY