Journal of long-term effects of medical implants最新文献

The main aim of the paper is to critically analyze advanced technologies and innovations in the field of dentistry. The following databases are utilized to assess relevant studies: Google Scholar, PubMed, NCBI, Scopus, Elsevier, and Web of Science. The analysis involves the transition from a subtractive manufacturing technique to an additive manufacturing technique. Three-dimensional printing has become popular in designing prostheses. Moreover, the paper discusses the sintering distortion of zirconia prosthesis. Similarly, multi-layering of titanium implants decreased the chances of implant failure. In conclusion, the paper focuses on both the benefits and related drawbacks of the advancements in the field of dentistry.

In 2011, a clinical trial of total hip arthroplasty with Biolox DeltaŴ ceramic on ceramic started in Japan before the clinical approval. We report the result with 33 hips as a mid-term one. No wear-related complication and no dislocation occurred with the maximum of 13.2 years follow-up. After the trial and the approval, we have continued to use Biolox DeltaŴ ceramic on ceramic even for difficult cases and the bearing couple is now our first choice for young and active patients.

Despite the generally high success rate of dental implant treatments, some complications may also occur. One of the most common mechanical problems is screw loosening of the abutment. This study aims to assess the impact of abutment type (original vs. non-original) and angle of abutment (angled vs. straight) on torque reduction and screw loosening under cyclic loading conditions. Thirty titanium implants were divided into three groups (n = 10): original straight abutments, non-original straight abutments, and original 15° angled abutments. Each implant, and its respective abutments, were embedded in prepared acrylic blocks and torqued to 25 N.cm. twice, with a 10-minute interval between each torque application. Reverse torque values (RTV) were evaluated before and after 500,000 cycles of cycling loading at 75 Hz with a 100 N load, using an electrical torque meter. Data analysis was conducted using SPSS software (version 21), employing descriptive statistics, ANOVA, and independent t-tests. After cyclic loading, the mean RTV was 18.41 ± 1.86 N.cm in the group of original straight abutments, 13.18 ± 1.75 N.cm in the group of non-original straight abutments, and 14.76 ± 1.04 N.cm in original 15° angled abutments. Statistically significant differences were observed in mean RTV between the two groups of original and non-original abutments as well as between angled and straight abutments (< 0.001). Original straight abutments demonstrated lower torque loss after cyclic loading compared with both non-original and 15° angled abutments. The findings suggest that using original straight abutments may have better outcomes in preventing screw loosening and ensuring proper performance in clinical settings. However, it is essential to thoughtfully evaluate alternative abutment types and angles when necessary.

Purpose: The popularity of dental implants as a solution for missing teeth continues to grow, and so do the challenges associated with them. The intrusion of a natural tooth adjacent to a non-splinted dental implant is one such challenge recently observed in implant prostheses. In this comprehensive review, we delve into several potential theories that could elucidate the reasons behind tooth intrusion adjacent to a lone-standing dental implant.

Materials and method: The following search terms were used for the data search: (dental implant) AND (intrusion of natural tooth). Articles written only in the English language in PubMed, Scopus, and Embase databases ranging from 1987-2023 were scrutinized and only 6 articles were included in the review.

Results: Freestanding implants surrounding the intruded teeth are an uncommon occurrence that can be caused by extremely tight proximal contacts that are below the height of the contour of adjacent implants. Given the absence of a periodontal ligament in implants, their response to pressure is limited, resulting in minimal movement. However, the tooth in between them could still undergo apical intrusion. The achievement of proper proximal contact of prostheses is crucial when a natural tooth is located between implant-supported prostheses. To restore the tooth's proper contours and proximal contacts, it's suggested that the proximal contacts first be relieved. This will allow the tooth to erupt again. Clinicians need to be aware of this phenomenon and should be ready to treat it if it occurs.

Background: After implant installation, there is an immediate inflammatory reaction. Therefore, exploring the inflammatory mediators around different surface treated dental implants is essential for long term survival of implants. The goal of this study was to compare the levels of Tumor necrosis factor-α (TNF-α) and Interleukin-10 (IL-10) in patients with sandblasted acid-etched (SLA, SLActive) and anodized (TiUnite) dental implants.

Materials and methods: In this prospective clinical study, 78 patients who had undergone implant placement for missing single posterior tooth in mandible using sandblasted acid-etched and anodized surface dental implants from September 2020 to January 2021 were enrolled according to strict inclusion and exclusion criteria and were categorized into Group 1: SLA (n = 27), Group 2: SLActive (n = 26), Group 3: TiUnite (n = 25) based on the surface modification of the implants. Utilizing an ELISA kit, the levels of TNF-α and IL-10 were measured in the peri-implant crevicular fluid (PICF) at 3 months and 1-year intervals and then subjected to statistical analysis.

Results: Compared to groups 1 and 2, TNF-α was high and IL-10 level was less in implants from group 3 (p < 0.05). At baseline (p < 0.05) and the 1-year follow-up (p < 0.05), there was a statistically significant difference in TNF-α and IL-10 levels between the groups on pairwise comparison. Also, an intragroup comparison revealed that in all three groups, there was a statistically significant difference from the baseline (p < 0.05).

Conclusion: Higher TNF-α and lower IL-10 levels in the peri-implant crevicular fluid was observed among patients with anodized dental implants as compared to sandblasted acid-etched dental implants.

Lumbar interbody fusion is widely accepted as a useful tool for treating lumbar spinal pathology. Appropriately choosing the correct sized implant to decrease risk of subsidence, as well as choosing the correct approach for the vertebral level, maximizes chances of success. Interbody fusion allows for indirect decompression and can increase lumbar lordosis. There are multiple approaches to lumbar interbody fusion including: anterior, oblique, lateral, transforaminal and posterior. Patient specific and anatomic factors determine which is most appropriate.

A dental implant is a surgical fixture that is placed into the jawbone and allowed to fuse with the bone over the span of a few months. It acts as an alternative for a lacking teeth.The implant surgical guide comprises a teeth formed contour which stimulates natural teeth and prosthesis. Dental implants preserve the bone that results in loss of jaw height and appearance of aging.The prefabricated dental implant can be used to locate single implants or couple of implants in a continuous manner permitting verification of implant site, angulation and rotational positions prior to the implant placement and thereby allowing more esthetic, functional and stable prosthesis. CAD/CAM has been used for decades in restorative dentistry and have improved its software in implant dentistry. Surgical guide plays an important role in optimal positioning and angulation of implants. Surgical guides have not only reduced the chances of damage to anatomic landmarks but also increased the esthetic. Guided surgery is a complete treatment concept for diagnosis, treatment planning and placement of implants with high accuracy. The main aim of this review is to know the importance, accuracy and advantages of CAD/CAM surgical guide for virtual implant placement.

Dental implants offer a reliable solution for tooth replacement, but peri-implant diseases, especially peri-implantitis, jeopardize long-term success by causing inflammation and bone loss. Mechanical debridement is the primary treatment, though its effectiveness is limited by the complex implant surface. Adjunct therapies, particularly natural bioactive compounds, like thymoquinone from Nigella sativa, have shown promise in improving treatment outcomes due to their antimicrobial, anti-inflammatory, and regenerative properties. The aim of this study was to assess the clinical efficacy of locally applied thymoquinone gel combined with mechanical debridement in treating peri-implantitis. This prospective study included 40 participants with peri-implantitis, randomized into two groups. Group 1 received mechanical debridement alone, while Group 2 received debridement with 0.2% thymoquinone gel. Clinical parameters, including plaque index (PI), gingival index (GI), peri-implant probing depth (PPD), and clinical attachment level (CAL), were measured at baseline and after 3 months. Statistical analysis was performed using paired and independent t-tests. At the 3-month follow-up, Group 2 showed significantly better outcomes in PI (0.50 ± 0.20), GI (0.62 ± 0.11), PPD (3.02 ± 0.14 mm), and CAL (3.17 ± 0.31 mm) compared to Group 1 (p < 0.05). Thymoquinone gel as an adjunct to mechanical debridement significantly improves peri-implantitis management, offering a promising therapeutic option. Further studies with longer follow-up are needed to confirm its long-term effectiveness.

Smoking is a risk factor for poor outcomes after total knee arthroplasty (TKA). The purpose of this study was to identify factors that could be modified to increase smoking abstinence and prevent relapse in these patients that would hopefully lead to more satisfactory outcomes. It involved a retrospective analysis of medical records and a survey of 200 patients (100 preoperative smokers and 100 preoperative nonsmokers) who underwent TKA at a single institution between 2018 and 2021. Ages ranged from 28 to 86 years old (mean 65.20). Nonsmokers were slightly older than smokers (67.59 vs. 62.82, respectively). Medical records of the preoperative nonsmokers were reviewed to obtain their postoperative Knee Injury and Osteoarthritis Outcome Score for Joint Replacement (KOOSJR) and demographic data. Based on KOOSJR scoring, preoperative nonsmokers had significantly better outcomes compared with preoperative smokers. Nonsmokers had significantly lower overall KOOSJR total scores compared with smokers (P = 0.016). Nonsmokers also demonstrated higher overall knee health than smokers as shown by the KOOSJR converted score and performed better in terms of functional movements. We concluded that nonsmokers have better outcomes than smokers after TKA, as they experienced less pain from movement and better knee health. Smoking-cessation interventions should be implemented both before and after surgery to improve outcomes and prevent smoking relapse.

The purpose of this study was to evaluate the amount and distribution of stress in the implant-supported fixed partial dentures and the surrounding bone in six different models by computer-simulated mastication. Finite element analysis was used to conduct the study. The three-dimensional (3D) model of a 3-unit implant-supported fixed partial denture was created. Six different material combinations were nominated. Full zirconia crown (ZZT), zirconia framework with feldspathic veneer (FZT), full lithium disilicate crown (LLT), lithium disilicate framework and feldspathic veneer (FLT), Ni-Cr framework with feldspathic porcelain veneer (NiCrT), full hybrid ceramic (HHT) and also a type 3 bone was created. The oblique load (534 N) and the horizontal load (76.5 N) were applied on the bridge, and stress values and distribution patterns were examined. The distribution pattern was the same in all the models. The full zirconia crown (ZZT) showed the highest stress values in the bone in both the oblique and the horizontal forces. The highest concentration was around the fixture on the surface of the bone in the cervical area. This study showed that restoration material of the fixed partial dentures does not affect the pattern and the location of maximum and minimum stress concentration. However, as expected, the magnitude of stress values can be changed by switching restoration materials.