- Reconstruction and Implant-Supported Rehabilitation of an Iatrogenically Caused Maxillary Alveolar Defectby Tüz, Hakan Hifzi; Koç, Onur; Meral, Salih Eren; El, Azime Sibel on 01/10/2019 at 12:00 am
Defects of the oral and maxillofacial region may arise from several reasons such as trauma, infection, cyst, tumor, medication related osteonecrosis of the jaw, and misuse of some irritant agents. For reconstruction, autogenous grafts remain the gold standard among the alternatives. In our case, a 42-year-old woman referred to our clinic for implant-supported fixed bridge rehabilitation of her edentulous and defected left 2nd premolar and 1st molar region. In examinations, devitalizing agent–dependent large defect was observed. Anterior iliac crest (AIC) grafting technique was preferred for reconstruction. Consecutively, 16-week bone healing and 3-month implant osseointegration periods were uneventful. After fabrication of the implant-supported fixed bridge, the patient was followed up for 2.5 years with no signs of bone resorption, gingival inflammation, and pain. AIC grafting and implant-borne fixed bridges seem stable and satisfactory methods for large maxillofacial defects.
- Maxillary Sinus Augmentation Using Hydraulic Pressure by Lateral Approach and Simultaneous Implant Placement: Clinicoradiographic Studyby Bhandari, Shilpy; Thomas, Raison; Kumar, Tarun; Shah, Rucha; Mehta, Dhoom Singh on 01/10/2019 at 12:00 am
The purpose of this study was to assess clinically and radiographically efficacy of maxillary sinus augmentation using hydraulic pressure in a lateral approach with immediate implant placement. In a total of 10 patients having less than 4 to 6 mm of subantral bone height, lateral approach sinus membrane elevation procedure was performed using hydraulic pressure with the help of a specialized water lift kit followed by grafting and simultaneous implant placement. Cone beam computed tomography analysis was used to assess the change in subantral bone height from baseline to the 6 months postoperatively. Radiographically, subantral bone height increased from 3.86 ± 1.423 mm at baseline to 15.49 ± 2.73 mm at 6 months postoperatively with a gain of 11.63 + 2.63 mm (P
- Tooth-to-Implant–Supported Fixed Partial Denture: A Comprehensive Overview of Systematic Reviewsby Ting, Miriam; Faulkner, Robert J.; Donatelli, David P.; Suzuki, Jon B. on 01/10/2019 at 12:00 am
Objectives: Tooth-to-implant–connected prostheses have been described as a possible treatment option for patients with long-span edentulous situations that were not conducive for placement of an adequate number of supporting implants. In this comprehensive overview of systematic reviews, the incidence of complications and the long-term survival rates of tooth-to-implant–supported fixed partial dentures (FPDs) were evaluated to determine whether it is a viable treatment. Materials and Methods: A systematic search of 5 electronic databases was conducted for systematic reviews and meta-analyses of tooth-to-implant–supported FPDs up to January 2017. The articles were AMSTAR rated for methodological quality, and low-quality articles were eliminated. Results: The initial search yielded 369 reviews in PubMed, 248 in Web of Science, 49 in EMBASE, 63 in Cochrane Library, and 27 in Google Scholar. After removal of duplicates and after full-text analysis, 5 were selected for the overview. Conclusions: Within the limitations of this overview, it was concluded that (1) the 10-year survival rates for tooth-to-implant FPDs were lower than the 5-year survival rates, (2) the tooth-to-implant FPDs' survival was lower than the individual abutment tooth or implant supporting it, (3) the biological and technical complications were more at 10 years compared with 5 years, and (4) the intrusion of the abutment teeth was more in the nonrigid connection FPDs than the rigid connection FPDs. Therefore, tooth-to-implant FPDs are a viable option but should be considered secondary to other available options with higher long-term survival rates and lower complications.
- Does the Drilling Technique for Implant Site Preparation Enhance Implant Success in Low-Density Bone? A Systematic Reviewby El-Kholey, Khalid E.; Elkomy, Aamna on 01/10/2019 at 12:00 am
Purpose: The objective of this systematic review was to investigate the possible association between the drilling technique and proper implant integration and survival in areas with low bone density. Materials and Methods: An electronic search using the MEDLINE/PubMed database was performed including studies published up to April 2018. Animal and clinical studies that evaluated the association between the drilling technique and proper implant integration and survival in low-density bone were included. Results: Fifteen studies met the inclusion criteria, including 7 experimental and 8 clinical. Undersized, osteotome, Piezosurgery, and osseodensification drilling were the 4 techniques found in the literature to enhance osseointegration of implants in low-density bone. Owing to the methodological variation, meta-analysis was not performed. The 4 drilling protocols were effective in increasing primary stability, but the long-term outcome is comparable with that of the conventional surgical drilling protocol. Conclusion: There is weak evidence suggesting that any of the previously mentioned surgical techniques could enhance successful osseointegration and survival of the implants placed in low-density bone.
- Next-Generation Biomaterials for Bone and Periodontal Regenerationby Wallace, Stephen S. on 01/10/2019 at 12:00 am
No abstract available
- Maxillary Sinusitis Associated With Peri‐implantitis at Sinus Floor Augmented Sites: Case Seriesby Park, Won-Bae; Han, Ji-Young; Oh, Se-Lim on 01/10/2019 at 12:00 am
Purpose: The purpose of this case series was to investigate treatment outcomes of maxillary sinusitis associated with peri‐implantitis at sinus floor augmented sites for a 3-year follow-up. Materials and Methods: Eighteen implants in 8 patients diagnosed with maxillary sinusitis associated with peri‐implantitis were reviewed. Four patients were treated with implant removal and antibiotics, and 4 patients were treated with implant removal, the modified Caldwell-Luc operation (CLOP), and antibiotics. Seven patients, who had 7 survived implants, were followed up to 3 years after treatment. The characteristics between failed and survived implants were compared. Radiographic parameters of survived implants were analyzed using the Friedman test. Results: Eleven failed implants from 8 patients exhibited approximately 10-mm pocket depths and mobility at diagnosis. Seven survived implants from 7 patients exhibited no significant changes in crestal bone loss at the facial side for 3 years after the treatments. Sinus mucosal thickening was significantly reduced during the 3-year follow-up after the treatments. Conclusion: The progression of peri‐implantitis in sinus floor augmented sites may lead to maxillary sinusitis. To confirm the efficacy of the intraoral approaches, such as the modified CLOP, systematic clinical studies with a large sample size and a long-term follow-up should be conducted.
- Thermal Testing of Titanium Implants and the Surrounding Ex-Vivo Tissue Irradiated With 9.3um CO2 Laserby Froum, Scott H.; Cantor-Balan, Roni; Kerbage, Charles; Froum, Stuart J. on 01/10/2019 at 12:00 am
Purpose: To measure the temperature rise and surface damage of titanium dental implants and the surrounding tissue in a pig jaw during 9.3-μm carbon dioxide (CO2) laser irradiation at various durations of time. Materials and Methods: Thermal analysis tests were performed on 12 implants with the same surface. Twelve implants mounted alone or in pig jaws were laser-irradiated with a 9.3-μm CO2 laser using 3 different power settings. The temperature of the implant body and the proximal tissues was measured with a J-Type Thermocouple after being laser-irradiated with 3 different power setting for 30, 60 seconds, and 2 minutes. Scanning electron microscope (SEM) and digital microscope images were also taken of the all the implants before and after laser irradiation to detect the presence or absence of surface damage. Results: Temperature analysis showed that in all cases the implant and the proximal tissue temperatures remained around the start temperatures of the implant and tissues with fluctuations of ±3°C but never reached the upper threshold of 44°C, the temperature at which thermal injury to bone has been reported. Digital and SEM images that were taken of the implants showed an absence of surface damage at the cutting speed of 20% (0.7 W); however, cutting speeds of 30% to 100% (1.0–4.2 W) did yield surface damage. Conclusions: Laser irradiation of titanium implant surfaces using a 9.3-μm carbon dioxide laser with an average power of 0.7 W showed no increase in thermal temperature of the implant body and tissue temperatures as well as no evidence of implant surface damage.
- Portuguese Abstract Translationson 01/10/2019 at 12:00 am
No abstract available
- Osseointegration of Dental Implants in Organ Transplant Patients Undergoing Chronic Immunosuppressive Therapyby Radzewski, Rafal; Osmola, Krzysztof on 01/10/2019 at 12:00 am
Introduction: The depressive impact of immunosuppressive medications used by patients after organ transplantations is commonly known and well proven. The aim of research is the assessment of functional and esthetic results of implantoprosthetic treatment in patients subject to immunosuppressive treatment after organ transplants. Materials and Methods: The study encompassed a group of 21 patients in the course of maintenance immunosuppression after transplantation procedures, in whom altogether 24 implants were inserted. The control group comprised 15 people with 15 implants in place. The research protocol assumed replacing a single missing tooth with a titanium implant. After 4 months, a prosthetic reconstruction in the form of a single crown was performed. After 24 months, the preliminary assessment of treatment results was attempted. The measured parameter was crestal bone level (CBL). The mechanical assessment was performed by measuring the torque indispensable to locate the implant and by an objective measurement of implant stability. Results: The basic measured parameter of CBL median in the experimental group and in the control group amounted to 0.325 mm (min 0–max 0.95) and 0.5 mm (min 0.15–max 1.8), respectively. The comparison of CBL medians revealed lack of significant differences between the experimental group and the control group (P = 0.089). Conclusion: Patients with organ transplants can safely and effectively undergo dental implant treatment.
- Alveolar Ridge Preservation Using Autologous Demineralized Tooth Matrix and Platelet-Rich Fibrin Versus Platelet-Rich Fibrin Alone: A Split-Mouth Randomized Controlled Clinical Trialby Ouyyamwongs, Warisara; Leepong, Narit; Suttapreyasri, Srisurang on 01/10/2019 at 12:00 am
Objective: To assess the potential of using autologous demineralized tooth matrix (aDTM) in combination with platelet-rich fibrin (PRF) membrane (aDTM/PRF) or PRF membrane alone (control) to preserve the ridge dimension and facilitate bone healing after tooth extraction. Materials and Methods: Forty premolar sockets were assigned to either the aDTM/PRF or control group. Horizontal and vertical ridge changes were evaluated at the baseline 2, 4, 6, and 8 weeks using cast-based and periapical radiographs. Results: aDTM was well tolerated in all sites without incidences of postoperative complication. The change in horizontal ridge width was significantly greater in the control compared with the aDTM/PRF group. The overall vertical marginal bone resorption on the mesial, distal, and central site in the aDTM/PRF group was not statistically different from the control group. During the first 6 weeks, the bone healing density in the aDTM/PRF group was significantly higher than that of the control group, then it converged at week 8. Conclusion: Application of aDTM with PRF membrane is useful for ridge preservation by reducing the horizontal ridge collapse and promoting bone healing as shown clinically and radiographically.
- Effect of 5 Popular Disinfection Methods on Microflora of Laboratory: Customized Implant Abutmentsby Homayouni, Ali; Bahador, Abbas; Moharrami, Mohammad; Pourhajibagher, Maryam; Rasouli-Ghahroudi, Amir Alireza; Alikhasi, Marzieh on 01/10/2019 at 12:00 am
Purpose: To compare the efficacy of 5 different decontamination methods of titanium abutments and to assess their possible effects on surface roughness of titanium. Materials and Methods: Micrococcus luteus, Acinetobacter baumannii, Enterococcus faecalis, and Candida albicans were cocultured to form a multispecies biofilm on 18 titanium discs. In another group, Bacillus subtilis, a spore-forming species, was cultivated on another set of 18 titanium discs. Each group was further divided into 5 test groups: high-pressure steam cleaning (4 Mpa, 5 seconds), NaOCl (1% active chlorine, 5 minutes), H2O2 (3%, 5 minutes), GaAlAs laser (810 nm, CW, 1 W, 400-μm fiber, 1-mm distance, 1 minute), Er:YAG laser (2940 nm, pulse mode, 100 mJ, 10 Hz, 230-μm noncontact handpiece, 4-mm distance, 50/50% air/water, 1 minute), and a control group of no treatment. After each decontamination procedure, the remaining microbial load was reported as colony-forming unit/disc. To evaluate the effect of each treatment on titanium discs, surface roughness parameters including Sa, Sq, Ssk, Sku, Sal, and Sdr were measured at 6 points of each disc using an atomic force microscope. Results: Complete disinfection was achieved using high-pressure steam, NaOCl, H2O2, and Er:YAG laser. GaAlAs laser was able to reduce microbial count over 90%. Sa and Sq parameters were only increased significantly in diluted NaOCl group in comparison with control group, whereas Sdr was increased significantly in both absolute and diluted NaOCl groups. Conclusion: All the methods could decontaminate machined titanium surfaces, although complete microbial elimination was not achieved by diode laser. None of the treatments altered surface roughness significantly, except for sodium hypochlorite (NaOCl).
- Effect of Implant-Abutment Connection Type on Bone Around Dental Implants in Long-Term Observation: Internal Cone Versus Internal Hexby Szyszkowski, Adam; Kozakiewicz, Marcin on 01/10/2019 at 12:00 am
Purpose: The purpose of this study was to evaluate the influence of the implant-abutment connection type on the bone level around dental implants in long-term observation and the survival rate for the different types of implant-abutment connections. Materials and Methods: Two groups of implants made of titanium grade 23 alloy and with sandblasted and acid‐etched (SLA) surface were included in the study: (a) the internal hex implant-abutment connection group (480 SPI dental implants; Alpha-Bio Tec, Petach Tikwa, Israel, 184 patients) and (b) the internal cone implant-abutment connection group (60 C1 dental implants; MIS Implant Technologies, Shlomi, Israel, 34 patients). Certain inclusion and exclusion criteria were applied. Marginal bone loss (MBL) around the dental implants was measured in intraoral radiographs taken with parallel technique with a film holder and by bite recording index. X-rays were performed at the moment of functional loading, and at 12, 24, 36, and 60 months after loading. The digital analysis was conducted using Dental Studio 2.0 computer software. Results: Average MBL was significantly lower in the conical connection compared with internal hex group—0.68 ± 0.59 versus 0.99 ± 0.89 mm (12 months), 0.78 ± 0.80 versus 1.12 ± 1.00 mm (24 months), 0.83 ± 0.87 versus 1.22 ± 1.03 mm (36 months), and 0.96 ± 1.02 versus 1.30 ± 1.15 mm (60 months after loading). Both groups of implants achieved a 100% survival rate. Conclusion: The internal cone connection reduced bone resorption compared with the internal hex. Both groups of implants had a 100% survival rate.
- Clinical Factors and Cellular Responses of In Situ Human Alveolar Bone–Derived Mesenchymal Stromal Cells Associated With Early Periimplant Marginal Bone Loss: A Prospective Cohort Pilot Studyby Kim, Dong-Jun; Kim, Seul-Ki; Cha, Jae-Kook; Lee, Jung-Seok; Kim, Chang-Sung on 01/10/2019 at 12:00 am
Purpose: To investigate clinical factors and cellular responses of in situ human alveolar bone–derived mesenchymal stromal cells involved in early periimplant marginal bone loss. Materials and Methods: Thirty-seven completely or partially edentulous patients were enrolled in this study. Periapical radiographs were taken at the time of implant surgery, at 3-month follow-up, and at 1-year follow-up. Univariate analysis and multiple logistic regression were performed to investigate the associations between marginal bone loss and study variables. The mRNA expression levels of 21 bone-remodeling– and tissue-healing–associated genes were analyzed by subgroup. Results: Thirty-one patients with 98 implants were followed. The incidence and mean amount of bone loss were higher for overdentures than for other prosthesis and higher for the maxilla than for the mandible. The bone loss group showed lower mRNA expression levels of runt-related transcription factor-2, bone morphogenetic protein-2, and peroxisome proliferator–activated receptor gamma-2 and higher receptor activator of NKκB ligand/osteoprotegerin (RANKL/OPG) ratio. Conclusion: Within the limitations of the study, certain genes involved in bone remodeling (runt-related transcription factor-2 [Runx-2], bone morphogenetic protein-2 [BMP-2], and peroxisome proliferator–activated receptor gamma-2 [PPARγ-2]) and RANKL/OPG are correlated with early periimplant bone loss, with the type of suprastructure and the involved jaw being significant clinical factors.
- Spanish Abstract Translationson 01/10/2019 at 12:00 am
No abstract available
- Radiological and Histomorphometric Outcomes of Homologous Bone Graft in Postextractive Implant Sites: A 6-Year Retrospective Analysisby Baldi, Domenico; Pesce, Paolo; Musante, Bruno; Pera, Francesco; Fulcheri, Ezio; Romano, Filomena; Menini, Maria on 01/10/2019 at 12:00 am
Objectives: The aim was to investigate the in vivo efficacy of a cancellous particulate allograft bone in the regeneration of postextractive atrophic sites. Material and Methods: Ten patients were selected, and after a minimally invasive extraction of the teeth (T0), a cone beam computed tomography was performed (T1). Seven days after extraction, Puros cancellous particulate homologous graft was inserted into the elected sites together with a membrane (T2). After 4 months, a cone beam computed tomography of the sites was performed (T3). After 5 months, samples of the regenerated sites were taken contextually to implant insertion (T4). The samples were histologically and histomorphometrically analyzed. Intraoral periapical radiographs were accomplished at T4 and at the 6-year follow-up appointment (T5). Results: The mean vertical bone augmentation was of 4.1 mm in the lower jaw and of 3.35 mm in the maxilla at T3 appointment. The mean horizontal bone augmentation in the lower jaw was 2.02 and 2.15 mm in the maxilla. At T4, the mean total bone was 60.01% and the mature bone was 98.41. At the 6-year follow-up visit, the mean periimplant bone resorption was 0.14 mm (range 0–0.5 mm). Conclusions: Cancellous particulate allograft bone demonstrated excellent bone regeneration behavior both in terms of quantity and quality, and stable results over a 6-year period. Clinical Relevance: Cancellous allograft bone can be successfully used to regenerate atrophic sites.
- Japanese Abstract Translationson 01/10/2019 at 12:00 am
No abstract available
- Concentrate Growth Factors Regulate Osteogenic Dysfunction of MC3T3-E1 Cells Induced by High Glucose Through PI3K/Akt Signaling Pathwayby Dong, Kai; Hao, Pengjie; Zhou, Wenjuan; Liu, Zhonghao on 01/10/2019 at 12:00 am
Introduction: The aim of this study is to investigate the effects of Concentrate Growth Factors Extract (CGF-e) on the proliferation and osteogenic differentiation of MC3T3-E1 cells under high glucose condition. Materials and Methods: MC3T3-E1 cells were divided into 4 groups including normal glucose (5.5-mM) group (control), high glucose (25.5-mM) group, normal glucose + CGF-e group, and high glucose + CGF-e group. The proliferation, osteogenic differentiation and mineralization of osteoblasts were evaluated, respectively, by the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT) assay, cytoskeleton analysis, alkaline phosphatase activity assay, alizarin red staining, and real-time polymerase chain reaction. Western blots analysis was used to explore the role of PI3K/Akt pathway. Results: The viability, osteogenic differentiation, and mineralization of MC3T3-E1 cells were significantly decreased by high glucose. All observed osteogenic dysfunction were inhibited by CGF-e. Moreover, the PI3K/Akt pathway was activated by CGF-e. Conclusions: It was concluded that the soluble factors released by CGF could significantly attenuate high glucose-mediated MC3T3-E1 cells osteogenic dysfunction through the PI3K/Akt pathway.
- Turkish Abstract Translationson 01/10/2019 at 12:00 am
No abstract available
- Implant Specialization: A Logical Progression or a Quagmire?by Judy, Kenneth W. M. on 01/10/2019 at 12:00 am
No abstract available
- Μενού Περιοδικών
- The New England Journal of Medicine
- Journal of Oral and Maxillofacial Surgery
- International Journal of Oral and Maxillofacial Surgery
- Journal of Cranio-Maxillofacial Surgery
- British Journal of Oral and Maxillofacial Surgery
- Oral and Maxillofacial Surgery (DGMKG)
- Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
- Oral and Maxillofacial Surgery Clinics
- Oral Oncology
- Clinical Oral Implants Research
- Otolaryngology — Head and Neck Surgery
- Implant Dentistry
- Head & Neck
- American Journal of Orthodontics and Dentofacial Orthopedics