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Research on Vibration Mechanism of Plant Cell Membrane with Ultrasonic Irradiation

Chinese Physics Letters 2015年第3期32卷 63-65页

作者：曹辉黄婉君乔佳婷王云鹏赵海君 Shaanxi Key Laboratory of Ultrasound Institute of AcousticsShaanxi Normal University

The vibration mechanism of the cell membrane of plant seeds is analyzed based on the physical effect of ultrasound. The vibration model of cell rectangular membrane of plant seeds is then proposed and the expression of resonance frequency is obtained. The resonance frequency of cell membrane under the built model in the case of knowing the surface tension, surface density and size of cell membrane are calculated. The results of the theoretical calculations are in accordance with the previous experimental results. The built vibration model of cell membrane has certain rationality and certain reference significance to the determination of parameters in ultrasonic breeding in physical agriculture.

关键词： PLANT cell membranes RESEARCH SEEDS -- Irradiation PERMEABILITY ULTRASONIC transducers resonance frequency analysis

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Survival of Chemically Modified Titanium Surfaced Implants in Irradiated Jaws of Oral Cancer Patients

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Open Journal of Stomatology 2015年第7期5卷 202-209页

作者： Mehmet Yaltirik Bilge Gokcen Rohlig Meltem Ozdemir Karatas Melike Ordulu Sübay Rustu Cem Tanyel Meltem Koray Department of Oral and Maxillofacial Surgery Faculty of DentistryIstanbul UniversityIstanbulTurkey Department of Prosthodontics Faculty of DentistryIstanbul UniversityIstanbulTurkey

Objective: To investigate the clinical performance of implants with chemically modified surfaces in irradiated bone in a period of five-years. Patients & Methods: 15 (6 females, 9 males, 50.2 years with a range of 38 - 60 years) patients who had been operated for oral tumors and had undergone radiotherapy were enrolled and 40 SLActive surface implants were placed (24 in the maxilla, 16 in the mandible). Implants were allowed to integrate for a period of 90 days and the stability of the implants was measured with resonance frequency Analyzer/Osstell? Mentor (Integration Diagnostics, Savedalen, Sweden) at implant placement, 30 days later and at the end of the 90th day. Patients follow up periods after the implant placement varied from 20 months to 60 months (mean: 45 months). Results: Two implants were lost in maxilla in healing period as a result of osseointegration failure. The survival rate was 95%. During the observation period, totally 4 implants were lost. The overall success rate was 90%. 3 of the lost implants were in maxilla and one was in mandible. The initial ISQ values of the implants differed from 20 - 71;the second values were between 24 - 71 and the last values were between 30 - 89. The implants which were lost could not show a value greater than 35. Conclusion: There was no any complication on the SLActive surface implant placed bones due to irradiation. Within the limitations of this study, it may be concluded that osseointegrated implants can be placed in irradiated bones, unless a careful patient selection and treatment planning is performed.

关键词： Irradiation resonance frequency analysis SLActive Success Criteria

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A Preliminary Clinical Study of Early Loaded Implants

A Preliminary Clinical Study of Early Loaded Implants

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中华口腔医学会第14次全国口腔医学学术会议（2012年会）

作者： Cong Wang Supervisor:Prof.Feilong Deng

Objective: *** the changes of implant stability after insertion by resonance frequency analysis *** the short-term clinical consequence of early loaded dental implant *** how patients’ individual factors influence the marginal bone resorption and tissue around the implants after insertion Materials and methods: Patients,who required partially edentulous or edentulous rehabilitation,were enrolled in the study from Mar,2011 to Sep,*** stability quotient(ISQ)and marginal bone level were assessed on the insertion day,while the patients’ individual factors included gender,age,smoking,inserted location,type of rehabilitation, diameter and length of implant,insertion torque and bone quality(Lekholm&Zarb classify)were also *** frequency analysis(RFA)measurements were performed at 4 weeks and 6weeks *** were loaded at 8 weeks postoperatively,marginal bone level and ISQ were ***-implant marginal bone level,modified plaque index(mPI),modified sulcus bleeding index (mSBI)and probing depth(PD)were recorded at 3- and 6-month follow-up visits at all *** were reported using descriptive *** stepwise regression analysis was used to evaluate the marginal bone resorption and soft tissue condition. Results: Twenty patients(13 males,7 females)were invited in present study and 49 Biomet 3i OSSEOTITE NT CERTAIN implants were *** means of insertion torque is 44.6±*** primary implant stability quotient were 75.1±*** value of ISQ showed such a changing mode:a relatively high primary stability,a decrease from implant placement to 4 weeks and a consequent increase after 6 weeks and 8 weeks,the value of 8 weeks(77.6±3.8)were even higher than the primary(P<0.05,ANOVA).During the observation(6-10months)all implants were all survived,obtained a clinical survival rate of 100%.The peri-implant bone resportion rate was 0.10±0.13mm per month from implant inserted to loaded.3 months af

关键词： early loading dental implant implant stability resonance frequency analysis

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