1,721,014 research outputs found
Alveolar ridge preservation procedure: xenograft versus extraction alone. A randomized clinical study
No full textBone, biomaterials and beyond. Chapter 1: An introduction to guided bone regeneration.
No full textThe introduction of osseointegrated dental implants soon 50 years ago has indeed revolutionized dentistry. The scientific evaluation of their use has shown good and increasingly successful treatment outcomes. A prerequisite though is the availability of sufficient bone volumes to ensure integration and acceptable aesthetic results.
In this book various surgical techniques, using different augmentation materials, are described and explained. The aim has been to highlight minimally invasive surgical techniques, which leads to less risk of morbidity and reduces treatment time.
Readers will enjoy a comprehensive atlas providing some practical advise for every day surgical practice based on solid scientific evidence
Labial frena and frenectomy: Clinica consideration [Frenuli labiali e frenulectomie: considerazioni cliniche]
No full textAbstract
Frenectomy is one of the most debated topic in dentistry. Its importance is due to the occurrence of many clinical conditions where a frenum may be considered pathological. The aim of this literature review is to establish clinical indications of frenectomy according to aesthetical, functional, orthodontic and periodontal evaluations. The Authors found that many studies showed sucb different conclusions so that it was impossible to draw specific guide lines for frenectomy. The Authors conclude that literature data can help clinicians in choosing treatment but any single case must be individually evaluated
Immediate Implant placement after removal of a failed implant: A clinical and histological case report
No full textThe purpose of this study was to evaluate the clinical success of an implant placed immediately after the explantation of a fractured blade implant. A healthy 58-year-old male nonsmoker presented with a fractured blade implant that had been subjected to biomechanical overload. A new blade implant was placed immediately after the removal of the fractured one. The new implant was placed with a composite graft of collagen gel and corticocancellous porcine bone and covered with a bioabsorbable membrane. Radiographic evaluation at 6 months postoperation showed complete bone healing. No residual bone defect was observed or probed during the uncovering phase; moreover, no mobility, pain, suppuration, or presence of peri-implant radiolucency were observed at the second-stage surgery
Bacterial plaque colonization around dental implant surfaces
No full textPURPOSE:
To examine the distribution of bacteria into the internal and external surfaces of failed implants using histologic analysis.
MATERIALS AND METHODS:
There were 10 failed pure titanium and 5 failed hydroxyapatite-coated titanium implants consecutively removed various years after their placement. Criteria for fixture removal were peri-implant radiolucency and clinical mobility. The mobile fixtures were retrieved with the patients under local anesthesia. Fixtures were removed maintaining the abutments with the aim to observe the bacterial infiltration at the level of abutment/implant interface and on the implant surface.
RESULTS:
A thin radiolucent space was always present around all the failed implants. The abutments screws were tightly secured in all clinical cases. The bacterial cells were composed of cocci and filaments, which were adherent to the implant surface with an orientation perpendicular to the long axis of the implant. All the specimens included in this study showed bacteria at the level of implant/abutment interface.
CONCLUSIONS:
Histologic analysis at the level of abutment/implant interface in 2-stage implants identified heavy bacterial colonization. These findings appear to support those studies showing bacteria penetration at the level of the micro-gap, which can legitimate the hypothesis that the micro-gap at the bone level could present a risk for bone loss caused by bacterial colonization
Leader genes: a data mining approach for molecular genomics
No full textAbstract
A very large amount of genes is involved in each different cellular process, but only a few of them are supposed to play a central role. The leader gene approach is a data mining method, which may allow the identification of genes with potential highest importance in a given cellular process. We plan to use this method to shed new lights on molecular mechanisms of some complex oral diseases
Immediate restoration of single implants placed immediately after implant removal. A case report.
No full textThe purpose of this case report is to describe the treatment of implants placed in fresh extraction sockets and immediately restored in cases of failure. A healthy 58-year-old nonsmoking man was referred for an implant that had lost osseointegration because of infection. The prosthesis showed slight mobility. It was therefore decided to remove the implant and replace it with a new one immediately. Since the patient refused to wear a provisional removable prosthesis, the possibility of applying an immediate loading protocol was discussed. The failed implant was removed carefully and the residual extraction socket was thoroughly debrided. Subsequently, the new implant was placed with a sterile surgical technique, as described by the manufacturer. The inserted implant had a titanium plasma-sprayed surface. Immediately following implant placement and with the patient still under local anesthesia, the initial restorative treatment began. The patient was placed on a strict follow-up regimen until soft tissue healing was complete. Subsequent follow-up examinations were performed after 12 months. At each recall, the patient underwent a thorough clinical and radiographic evaluation. The healing period proceeded smoothly. At the end of the follow-up period, the implant was asymptomatic, immobile, and osseointegrated. No peri-implant bony defects were observed on probing. The results of the present case report seem to suggest that implants placed in fresh extraction sockets and restored immediately might provide a valid treatment option for the treatment of failed implants
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