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Evaluation of 4 different bone graft substitutes and autogenous bone grafting in root-end resection osteotomies after retrograde root-filling with Intermediate Restorative Material(IRM):An experimental study in dogs

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Open Journal of Stomatology 2013年第2期3卷 203-208页

作者： Dan-Ake Walivaara peter abrahamsson Maxillofacial Unit Halmstad Hospital HallandHalmstadSweden

Purpose: To investigate the periapical tissue response after root end filling with intermediate restorative material (IRM) and filling of the root-end resection bone defects with autogenous bone or a bone graft substitute in comparison to empty controls. Materials and Methods: Vital roots of the second, third and fourth mandibular premolars in six healthy mongrel dogs were apectomized. The root canals were prepared and sealed with IRM following a standardized surgical procedure. The resection bone defects were either filled with autogenous bone (PB) or one of the bone graft substitutes;CERAMENTTM|BONE VOID FILLER, ChronOS?, TigranTM PTG, Easygraft? CLASSIC or left empty. After 120 days the animals were sacrificed and the specimens were analyzed radiologically and histologically. Kruskal-Wallis and Mann-Whitney tests were performed for statistical evaluation. Results: 34 sections were analyzed histologically. The evaluation revealed a variation in the outcome amongst the tested options, regarding reestablishment of the periapical bone healing and inflammatory infiltration in the sections. According to the tested variables, there was no statistical significant difference between the materials when comparing all groups as a whole. When comparing individual materials to each other there was statistical differences among some of the tested materials. Conclusion: The healing outcome after periapical surgery of a five-wall resection defect could not be increased by infill with autogenous bone or bone graft substitutes. The most important factor for the healing outcome in periapical surgery is the quality of the root-end sealing. The healing outcome after some of the tested bone substitutes, might be improved by longer healing time.

关键词： Bone Graft Substitutes Periapical Surgery Autogenous Bone Intermediate Restorative Material

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Short-term postoperative discomfort in patients receiving flapless contra open implant surgery

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Open Journal of Stomatology 2013年第5期3卷 298-305页

作者： Alexander Aizenberg Jesper Jansson peter abrahamsson Department of Oral and Maxillofacial Surgery and Oral Medicine Faculty of OdontologyMalmo UniversityMalmoSweden Maxillofacial Unit Halmstad HospitalHalmstadSweden

Purpose: The aim of this pilot study was to evaluate subjective and objective findings on short-term post-operative discomfort in patients receiving flapless implant surgery compared to traditional open flap surgery. Materials and Methods: A two-centre, prospective survey study was conducted, using a customized questionnaire. Between December 2010 and January 2012, 20 patients were consecutively included. Eleven received conventional open-flap surgery and nine received flapless surgery. Inflammatory signs, analgesic consumption and sleeping difficulties were evaluated up to seven days postoperatively. A clinical examination was made one week postoperatively. Results: Significantly less experienced swelling was noted 24 hours after flapless surgery compared to open flap surgery for patients receiving four implants or more, and at three days postoperatively for patients receiving single implants. No difference concerning sleeping difficulties, pain or analgesic consumption was found. Clinical examination one week postoperatively showed no differences in wound gaps, redness of the mucosa, or presence of pus between the groups. Conclusions: In conclusion, flapless surgery seems to have a limited effect on postoperative comfort and short-term post-operative signs of soft tissue healing compared to open flap surgery. There is a need for larger randomized trials for evaluating differences in postoperative discomfort between the two surgical techniques.

关键词： Postoperative Discomfort Flapless Surgery Guided Implant Surgery

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Resource management in radio access and IP-based core networks for IMT Advanced and Beyond

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Science China(Information Sciences) 2013年第2期56卷 102-117页

作者： SU Gang HIDELL Markus abrahamsson Henrik AHLGREN Bengt LI Dan SJDIN peter TANYINGYONG Voravit XU Ke Department of Electronics and Information Engineering Huazhong University of Science and Technology School of Information and Communication Technology KTH Royal Institute of Technology

The increased capacity needs, primarily driven by content distribution, and the vision of Internet-of-Things with billions of connected devices pose radically new demands on future wireless and mobile systems. In general the increased diversity and scale result in complex resource management and optimization problems in both radio access networks and the wired core network infrastructure. We summarize results in this area from a collaborative Sino-Swedish project within IMT Advanced and Beyond, covering adaptive radio resource management, energy-aware routing, OpenFlow-based network virtualization, data center networking, and access network caching for TV on demand.

关键词： IMT Advanced and Beyond resource management resource optimization traffic engineering network virtualization

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