IM0210

implants2_2010 health,allofthemwerepartiallyedentulous(patients forwhomweplannedtoextractteethduringsurgery wereconsideredaspartiallyedentulousinthisstudy) and all surgeries were performed by the same sur- geon. Results It appears that antral septa are more commonly foundinedentulousatrophicmaxillaethanindentate ones, in the posterior portion of the maxillae than in theanteriorportionandintheleftsideratherthanthe rightsideofthemaxillae.ACTscanistheradiographic method of first choice for detecting the presence of septa, while panoramic radiography was found to be less sensitive and sometimes misleading in detecting sinus septa. Precise knowledge of patient’s maxillary sinus anatomy allows for exact planning of surgery and helps to avoid unexpected complications. Dr Ahmed Fadl, MSc Krems University, Sudan Evaluation of laser appli- cation to uncover dental Implantinthesecondstage surgery Lasers have been used in oralsurgeriesformanyyears withgreatsuccess. Inthisre- search (in which a diode laser 980 nm was used), 10 patientsparticipated,eachofwhomhadbeentreated with dental implants more than three months ago, with a conventional first surgical stage. Alltheimplantswereuncoveredsuccessfullywith laser aid. For each implant the procedure was com- pleted in less than 10 minutes. All patients reported very minimal postoperative discomfort or very slight pain at the one-week recall appointment. A fixture levelimpressionwastakenatthatrecallappointment. According to the results of this research, soft tis- sue laser should be considered as an effective alter- native technique for implant uncovering in the sec- ond surgical stage. Dr Hisham Abueljebain, MSc Krems University, Kuwait Stem Cell Derived Bone Implant therapy has be- comethestandardofcarefor edentulous areas of the oral cavity. Following tooth ex- traction, there is often an in- adequateamountofboneinwhichtoplacedentalim- plants. Insuchcases,aridgeaugmentationprocedure is performed prior to implant placement. Ridge aug- mentation techniques to correct these defects in- cludeguidedboneregeneration(GBR)utilizingabar- rier membrane, bone graft alone or bone graft with a membrane. In elderly patients bone grafting may cause an- other injury in the donor site which may take days or even months to heal. This is often unacceptable to many patients. We propose here a new technique whichislesstraumaticandhencemoreacceptableto the patients. Bonemarrowcontainsosteoblastprogenitorcells which appear to arise from a population of pluripo- tentialconnective-tissuestemcells,whichcanbeob- tained with aspiration. When cultured in vitro under conditions that promote an osteoblastic phenotype, osteoblast progenitor cells proliferate to form colonies of cells that express alkaline phosphatase and, subsequently, a mature osteoblastic phenotype. These cells will produce new bone at the ridge which may give an implantologist adequate bone width at the ridge where an implant should be inserted. Dr Subea Hijazi MSc Krems University, Syria Atrophied posterior man- dible. Where to start? Implant treatment is be- comingthefirstchoicetore- place missing teeth or fill free spaces in the jaws. Nowadays, the bone resorp- tion or bone defects can appear in horizontal or ver- tical direction or both. Bone reconstruction should restore bone volume in both directions. The type of handling this defect will allow the maintenance of implant and the primary stability, a favourable oc- clusal axis and an environment around implant that willfacilitateprostheticreconstructionandhygiene access to the implanted area. Therefore, the posterior mandible region is al- waysachallengefordoctorsbecauseoftheanterior alveolar nerve, especially if there is advanced bone resorptioninthearea.Overthelastdecademanyar- ticles have been written detailing the scientific dis- cussion of this problem and the search for possible solutions; we can divide them into: 1. Alternatives to implant treatment (no implant) 2. Bone augmentation techniques 3. Alveolar distraction 4. Nerve transposition or lateralization 5. Short implant 6. Subperiosteal implant Dr Ahmed Fadl (l.) Dr Hisham Abueljebain Dr Subea Hijazi (r.)