Implant Dentistry最新文献

Objectives: The aim of this review was to systematically screen the literature on surgical non-regenerative treatments of periimplantitis, especially for radiologic and clinical outcomes, and to determine predictable therapeutic options for the clinical management of periimplantitis lesions.

Material and methods: The potentially relevant literature was assessed independently by 2 reviewers to identify clinical studies, trials, and case series in humans describing the surgical non-regenerative treatment outcomes of periimplantitis with a follow-up of at least 6 months. MEDLINE, EMBASE, and the Cochrane Library were searched for studies reporting changes in probing depth (PD) and/or bleeding on probing (BOP) and/or radiologic marginal bone-level changes.

Results: A total of 10 publications were included: 6 prospective randomized controlled trials, 1 prospective cohort study, 2 retrospective controlled studies, and 1 case series. Clinical parameters can be reduced by surgical non-regenerative treatments. Concerning 3 year follow-ups, BOP and PD values decreased more efficiently after implantoplasty than using systematic administration of antibacterials. Adjunctive local chemical irrigations or diode laser have no long-term effects. The non-regenerative surgical approach in combination with implantoplasty also shows improved radiographic parameters.

Conclusions: Surgical non-regenerative treatment of periimplantitis can reduce the amount of inflammation in the short-term follow-up. Using implantoplasty may result in the improvement of clinical and radiographic parameters. Because of limited evidence and heterogeneity in study design, there is a need for randomized controlled studies with proper design and powerful sample size in the future.

Purpose: Patient-administered and professionally administered periimplant maintenance have been recommended to ensure long-term periimplant tissue health. In this narrative review, the effectiveness of patient and professionally administered interventions and the current level of evidence that periimplant maintenance therapy is effective in preventing the occurrence of periimplant disease were examined.

Materials and methods: A systematic literature search was performed in Ovid MEDLINE, EMBASE, Cochrane Library, and Web of Science, for evidence-based articles in support of the above topics.

Results: Twenty-six clinical trials were included and stratified into categories based on topics.

Conclusions: The following conclusions were reached: (a) mechanical plaque removal is the foundation of successful periimplant therapy; (b) patient- and professionally administered plaque control has been shown to reduce periimplant inflammation, although complete resolution of inflammation is not always evident; (c) the use of adjunctive chemical agents in maintaining periimplant health still remains to be determined; and (d) regular periimplant maintenance plays a significant role in maintaining periimplant soft and hard tissue health.

Purpose: The purpose of this review was to search in international published peer-review articles, data regarding prosthetic risk indicators affecting the incidence, prevalence, or treatment outcome of periimplant diseases.

Materials and methods: A literature search was performed in MEDLINE via PubMed database of the US National Library of Medicine of articles published until February 2018; a manual search was also added. Randomized controlled trials, controlled trials, prospective and retrospective cohort studies with a minimum of 20 subjects, having cases with/without exposure to the risk indicator were included. Articles written in another language than English were not included.

Results: The 17 articles reviewed indicated the cement residuals at abutments were identified as risk factors for both mucositis and periimplantitis. Among the screw-retained prosthetic reconstructions, prostheses screwed directly to the implants have higher risk to develop periimplant disease. The accessibility and the possibility to perform adequate plaque control around the prosthetic suprastructure decreases the risk for periimplant disease; convex emergence profiles seem to increase it. The crown margins located submucosa may impair the periimplant treatment outcome.

Conclusion: Prosthetic reconstruction on implants should be designed in a way to allow accessibility to proper plaque control. Screw-retained suprastructure and crown margins located supra-mucosa should be preferred when possible. When using cement-retained suprastructure, attention should be given to remove cement residuals.

Background: The aim of this article is to review the current understanding regarding periimplant soft-tissue conditions to minimize risk of periimplant mucositis and periimplantitis.

Materials and methods: An electronic search was performed in 4 different databases. Articles were reviewed and summarized if the following criteria were met: published evidence with recommendations on soft-tissue conditions around dental implants.

Results: An evaluation of various soft-tissue parameters, including the need of keratinized mucosa, periimplant mucosal height and phenotype, midfacial tissue level, and papillary fill, was performed based on the currently available evidence.

Comments: The need of keratinized mucosa is the parameter investigated the most. A trend favors a need of a wide band of nonmobile keratinized mucosa is seen with the benefit of less incidence of periimplant mucositis. In addition, the influence of the mucosal height and tissue phenotype on periimplant tissue health remains inconclusive. Although other soft-tissue parameters, including papillary fill and midfacial tissue level, are not yet proven to be related to periimplantitis, they play a crucial role to achieve successful esthetics.

Conclusion: A limited amount of evidence was identified to correlate periimplant soft-tissue parameters with periimplantitis. However, a wide band of nonmobile keratinized mucosa, an adequate periimplant mucosal height, and a thick tissue phenotype might reduce the incidence of tissue inflammation and future complications.

Purpose: The purpose of this study was to evaluate the clinical, histological and radiographic outcomes of the calcium phosphate double-coated anorganic bovine bone (InduCera; Oscotec Inc., Seongnam, Gyeonggi, Republic of Korea) compared with that of anorganic bovine bone (Bio-Oss; Geistlich Biomaterials, Wolhusen, Switzerland) in maxillary sinus augmentation, prospectively.

Patients and methods: Twenty-eight sinuses in 25 patients (3 bilateral) with vertical alveolar bone height from 2 to 5 mm were included in this study. The maxillary sinus was augmented with InduCera or Bio-Oss, followed by a healing period of 6 months. Trephine cores were obtained for histomorphometric evaluation with the implant placement. Cone-beam computed tomography (CBCT) scans were taken at 1 week and 6 months after sinus augmentation.

Results: The graft sites were healed without any notable complications in both groups. In histomorphometric analysis, the area of the newly formed bone was measured as 21.37 ± 8.87% for InduCera and 23.02 ± 5.88% for Bio-Oss, with no significant differences. Radiographically, no statistically significant differences were calculated between the groups in bone height at baseline, the height of bone augmentation, the final alveolar bone height (alveolar bone height + augmented height) after 6 months in panoramic radiograph. There were also no significant differences in the shrinkage rate of the grafted area volume in CBCT.

Conclusion: Although calcium phosphate double-coated anorganic bovine bone showed no additional effect compared with anorganic bovine bone from a histological and radiographical point of view, it could be used as the bone graft material in maxillary sinus augmentation.

Purpose: The objective of the present study was to assess patient satisfaction and esthetic implant outcome 10 years after maxillary sinus floor augmentation with autogenous bone graft from the mandibular ramus.

Materials and methods: Maxillary sinus floor augmentation with autogenous bone graft from the mandibular ramus was conducted in 48 consecutive patients from 2002 to 2006. Records and radiographs were retrospectively analyzed. Twenty-four patients including 34 sinus augmentation procedures and 37 implants were evaluated after 10 years. Subjective and professional evaluations of the final periimplant soft tissue, implant crown, and total implant treatment were conducted.

Results: The 10-year survival of suprastructures and implants was 84% and 100%, respectively. The patients were highly satisfied with the esthetic and implant treatment outcome expressed by scores >90 on the visual analog scale. Most implants were characterized by scores of 1 or 2, resulting in a mean pink esthetic score of 9 (maximum 14) and a white esthetic score of 8 (maximum 10).

Conclusion: Maxillary sinus floor augmentation with autogenous bone graft is characterized by high long-term implant survival rate and patient satisfaction.

Objective: The aim of this study was to review potential deviation factors in stereolithographic surgical guides for dental implantology, warnings, and limitations of the system.

Methods: An electronic search in databases EMBASE, the Cochrane Library, and PubMed were conducted by 3 researchers to collect information on the accuracy of static computer-guided implant placement to summarize and analyze the overall accuracy. The latter included a search for correlations between factors such as support (teeth/mucosa/bone), number of templates, use of fixation pins, jaw, template production, guiding system, and guided implant placement in articles related to guided surgery with stereolithographic static systems. Studies published between 2012 and 2017 were reviewed.

Results: From 761 identified articles, a total of 24 articles were reviewed, which included 2767 dental implants. Data from studies analysis had shown a mean deviation of 3.08 degrees in angular position, 1.14 at the entry point, and 1.46 at apex position. Involved deviation factors were related to planning, laboratory, and surgical phases.

Conclusion: Guided surgery may have a limited precision as technique, which surgeons need to be aware in the planning process. This review suggests some security measures in guided surgery process.

The aim of this case report was to describe the inferior alveolar nerve (IAN) lateralization technique using the piezoelectric device for the posterior rehabilitation of an atrophic mandible with implants. The patient presented the absence of elements 35 and 36 associated with a vertical defect impairing the adequate dental implant placement without IAN damage. A full-thickness mucoperiosteal flap was raised, and a bone window was made with a piezoelectric device centralized on the IAN canal position. After dissection, the IAN was moved buccally with a sterile elastic strip. Morse cone 4.0 × 1.5-mm implants were inserted while the IAN remained retracted. At the 4-month follow-up, the screw-retained prosthesis was installed guaranteeing the recovering masticatory function. In conclusion, the case report showed that the IAN lateralization performed with an adequate surgical technique can be successfully indicated for longer implant placement in edentulous atrophic posterior mandible with no permanent neural damage.

Objectives: To use resonance frequency analysis to evaluate tapered implants placed at maxillary posterior sites after lateral sinus augmentation.

Materials and methods: Patients who had missing teeth in the maxillary posterior area and required lateral sinus augmentation before implant placement were enrolled in this study. After a 6-month healing period, a tapered implant (Osstem TSIV) was placed. Implant success rate, survival rate, and marginal bone loss of the implants were measured. For resonance frequency analysis, implant stability quotient (ISQ) values were measured at each visit during a 1.5-year follow-up period.

Results: Twenty-four patients completed the study procedure. The residual bone height was 2.57 ± 1.10 mm (mean ± SD). Healing of the grafted area was uneventful in all cases, and 55 tapered implants were installed. The implant success rate was 95.56%, and the survival rate was 100% throughout the observation period. The marginal bone loss was limited to 0.22 ± 0.44 mm. ISQ increased gradually from 68.40 ± 11.14 to 82.24 ± 4.75 during the 1.5-year follow-up period.

Conclusion: The tapered implants showed good initial and final stability after placement in the soft bone of the maxillary posterior area after lateral sinus augmentation.