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排序方式: 共有221条查询结果,搜索用时 15 毫秒
1.
Christian Lee Norman Tinanoff Glenn Minah Elaine Romberg 《Journal of public health dentistry》2008,68(1):57-60
OBJECTIVES: Visible plaque on the maxillary anterior teeth of young children has been identified as a risk indicator for early childhood caries. The present study examined whether this plaque is related to the colonization of children's teeth with Mutans streptococci (MS) or toothbrushing frequency. METHODS: Thirty-nine children, aged 12 to 36 months, had plaque scores, and plaque samples were taken from the labial surfaces of the maxillary incisors at baseline and repeated 3 days after suspended oral hygiene (plaque regrowth). RESULTS: A positive correlation was found between the baseline percent MS and regrowth plaque score and between baseline and regrowth plaque scores. Plaque scores of those that brushed zero to one time a day were not different from those who brushed two or more times a day. CONCLUSIONS: This study suggests that the presence of plaque on the anterior teeth of young children is consistent and related to MS colonization. 相似文献
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Elizabeta Evtimovska DDS MS Radi Masri BDS MS PhD Carl F. Driscoll DMD & Elaine Romberg PhD 《Journal of prosthodontics》2009,18(6):479-483
Purpose: The aim of this study was to examine early changes in retentive values of implant overdenture attachments during multiple pulls.
Materials and Methods: Two implant attachment systems (Hader bar and clip, Locator system) were used in this study. The experimental groups were divided into yellow Hader clips, white Locator attachments, and green Locator attachments. Each group consisted of 21 matrix attachments. The attachments were placed into a custom-made acrylic resin block seated passively on another acrylic block containing a Hader bar or two Locator abutments with different angulations. Each attachment was subjected to 20 consecutive pulls using a universal testing machine. The peak load-to-dislodgement of the attachments after each pull was documented, and the percent reduction of the peak load-to-dislodgement was calculated. One-way ANOVA and Tukey's honestly significant difference test were used for data analyses. A p ≤ 0.05 was considered significant.
Results: There was a significant difference in the percent reduction in peak load-to-dislodgement between the attachments after the first pull ( p = 0.005) and after the final pull ( p = 0.0001). The yellow Hader clips exhibited the least percent reduction in peak load-to-dislodgement (6.50 ± 3.59%) after the first pull, followed by the white Locator attachments (8.60 ± 4.42%); the green Locator attachments exhibited the greatest reduction (11.05 ± 4.94%).
Conclusion: The results of this in vitro study demonstrate that retentive values of the Locator attachments are reduced significantly after multiple pulls. Although this reduction might not be noticeable to the patient, it is recommended that the clinician place and remove the overdenture multiple times before delivery. 相似文献
Materials and Methods: Two implant attachment systems (Hader bar and clip, Locator system) were used in this study. The experimental groups were divided into yellow Hader clips, white Locator attachments, and green Locator attachments. Each group consisted of 21 matrix attachments. The attachments were placed into a custom-made acrylic resin block seated passively on another acrylic block containing a Hader bar or two Locator abutments with different angulations. Each attachment was subjected to 20 consecutive pulls using a universal testing machine. The peak load-to-dislodgement of the attachments after each pull was documented, and the percent reduction of the peak load-to-dislodgement was calculated. One-way ANOVA and Tukey's honestly significant difference test were used for data analyses. A p ≤ 0.05 was considered significant.
Results: There was a significant difference in the percent reduction in peak load-to-dislodgement between the attachments after the first pull ( p = 0.005) and after the final pull ( p = 0.0001). The yellow Hader clips exhibited the least percent reduction in peak load-to-dislodgement (6.50 ± 3.59%) after the first pull, followed by the white Locator attachments (8.60 ± 4.42%); the green Locator attachments exhibited the greatest reduction (11.05 ± 4.94%).
Conclusion: The results of this in vitro study demonstrate that retentive values of the Locator attachments are reduced significantly after multiple pulls. Although this reduction might not be noticeable to the patient, it is recommended that the clinician place and remove the overdenture multiple times before delivery. 相似文献
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Elbel Nippe Dubitscher Beil Mueller B. Peters Gerd Notz-Schwarz I. v. Krber Gerstenberg Hebestreit Steiger Estler Bergerhoff Lochtkemper Graf Romberg Whrer Kanitz Sjvall Einar Klauer Wachholz L. 《International journal of legal medicine》1940,33(4):311-319
International Journal of Legal Medicine - 相似文献
5.
H. W. Romberg und J. Pavlok 《Clinical and experimental medicine》1944,113(5-6):677-688
Zusammenfassung Zusammenfassend k?nnen wir feststellen: Die psychischen und psychomotorischen Funktionen, die wir prüften, und ebenso die
Zeitreserve, wurden durch eine angemessene Pervitindosis, die zur Beseitigung eines Ermüdungszustandes genommen wurde, nicht
nachteilig beeinflu?t. Es werden im Gegenteil die Leistungen bei der L?sung der gestellten Aufgaben um 5–15% verbessert und
die Zeitreserve um ein geringes verl?ngert. 相似文献
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