Aim To compare the clinical and radiographic results of immediate versus delayed implant placement within the aesthetic zone of the maxilla. Materials and methods In the maxillary aesthetic zone, a sum of 20 implant sites were selected, with 10 in the immediate implant group and 10 in the delayed implant group. Atraumatic extraction was carried out with a periotome in immediate group. After prepping the osteotomy site, the selected implants were placed in both groups. Soft and hard tissue parameters were assessed in both groups after 1 week,1 month, 3 months, and 6 months following the surgical procedure. The aesthetic outcome was evaluated using implant esthetic score (IES), while Cone Beam Computed Tomography (CBCT) was employed to measure the loss of crestal bone around implants. Results At follow-up, both groups had acceptable implantestheticscore. However, the immediate implant group exhibited significantly higher scores compared to the delayed implant group (P<0.05). A significant difference was noted (P<0.001) in mean peri-implant crestal bone loss at buccal site, with the immediate implant group exhibiting a higher value (1.41 +/- 0.15) compared to the delayed implant group (1.15 +/- 0.12). There was no significant difference in peri-implant bone loss observed at the palatal, mesial, and distal sites (P>0.05). Conclusions The immediate implants had better aesthetic outcome regarding soft tissue changes around the implant site. At the buccal site, the delayed implant group exhibited a reduced amount of crestal bone resorption compared to the immediate implant group.
Introduction Implant-supported fixed prostheses are the preferred treatment for restoring missing teeth in the posterior maxilla. In cases of severe atrophy, conventional implant placement becomes difficult, and alternative approaches such as pterygoid implants may be necessary. Aim of Study: This study aimed to evaluate prosthetic screw loosening and postoperative pain after immediate loading of single-piece pterygoid implants combined with multi-unit abutments in the posterior atrophic maxilla. Methodology A prospective, single-group clinical study was conducted on 15 patients (8 males and 7 females; mean age 60.07 years) who received three implants: one pterygoid implant and two compressive implants. All implants were immediately restored with screw-retained prostheses using multi-unit abutments. Postoperative care included antibiotics, analgesics, and chlorhexidine rinses. Followup was performed for three months to assess prosthetic complications. Results Out of 15 patients, 12 (8095) experienced no complications, while 3 patients (2095) presented with prosthetic screw loosening after three months. The issue was resolved by re-tightening the screws with a torque of 30 Ncm, and no recurrence was observed. Conclusion Within the limitations of this study, immediate loading of single-piece pterygoid implants with multi-unit abutments appears to be a reliable option for rehabilitation of the atrophic posterior maxilla. Prosthetic screw loosening may occur as a short-term complication butcan be successfully managed with proper torque protocols.
Objective Although several biomaterials have been tried for alveolar ridge preservation post tooth extraction. There is still no ideal biomaterial suggested for socket preservation. Among the various bone grafts used, xenografts such as De-proteinized bovine bone mineral (DBBM) have been widely used. It has a slow substitution rate and takes several months to years to resorb which could be detrimental to bone-to-implant contact (BIC). In this scenario, platelet concentrates, especially third generation such as advanced platelet-rich fibrin (A-PRF) have been used for regenerative therapy. It has a unique advantage of sustained release of growth factors, apart from the presence of elevated levels of leucocytes which not only reduces the inflammatory reaction but also helps in the recruitment of osteoprogenitor cells, thereby facilitating new bone formation. The present study aimed to evaluate the effectiveness of the combination of DBBM and A-PRF in alveolar ridge preservation. Materials and Methods Thirty-nine patients requiring extraction of teeth and replacement with dental implants were randomized into one of the three ridge preservation approaches: DBBM, A-PRF, and DBBM+A-PRF. Four months post socket preservation, bone cores were harvested before implant placement. The bone samples were then subjected to histological and histomorphometric analysis. Results Significantly more vital bone was present in the DBBM+A-PRF group compared to the A-PRF group and DBBM group (P =0.00). However, the connective tissue formed was more in the DBBM group and A-PRF group compared to the DBBM+A-PRF group (P =0.00), which was statistically significant. Conclusion New bone formation was qualitativelysuperior in the DBBM+A-PRF group compared to when DBBM and A-PRF were individually used which could be detrimental to BIC thereby providing better osseointegration.
Aim The zygoma implant has proven to be a viable treatmentoption for atrophic edentulous maxillae as well as in post maxillectomy conditions. This study aimed to assess the accuracy of implant placement using the conventional technique versus dynamic navigation technology. Methods Zygomatic implant placementswere performed using the freehand technique in the control group and the dynamic navigation system in the test group. The deviations were assessed by comparing pre and post-operative CBCT scans using the "Evalunav" module in the software. Results The mean deviations at the entry site (2D) were significantly lower with the navigation system than with the freehand technique. At the apex (3D), the deviation in implant placement was greater in the freehand group compared to the navigation group. A further comparison was done between the right and left sides of the arch, where a greater deviation on the right side of the arch than on the left was observed with no statistical significance. Conclusion The Dynamic navigation system in implant surgeryfor accurately placingzygomatic implants in patients with atrophic maxilla requiring full-arch rehabilitation reduces variability/errors, ensuring more precise treatment outcomes.
This study evaluated the color stability and microhardness of four resin composite materials after 30 days of immersion in red wine, tea, and coffee. Four materials were tested: G-aenial ACHORD (GC), Venus Pearl (Kulzer), Filtek Universal (3M), and Clearfil Majesty ES-2 (Kuraray). A total of 120 disc-shaped specimens (30 per material) were fabricated and exposed to the staining agents. Color stability was assessed using DE, calculated from CIE Lab values (L, a, b), and microhardness was measured using a Vickers microhardness tester. Descriptive statistics (mean +/- sd) were calculated for each group. A one-way ANOVA was performed to assess significant differences in color change (DE) and microhardness between groups at T0 and T1. Post hoc Tukey's HSD test was used to identify specific group differences, with a significance level set at p < 0.05.bResults showed that red wine caused the most significant discoloration (highest DE), with significant differences between solutions (p < 0.05). Filtek Universal exhibited the highest DE values in both tea (DE = 14.46 +/- 0.24) and coffee (DE = 14.11 +/- 1.13), and the most pronounced discoloration in red wine compared to the other materials (p < 0.05). Clearfil Majesty ES-2 showed the lowest microhardnessvalues inwine (Vickers hardness = 45.2 +/- 2.3) and tea (Vickers hardness = 48.4 +/- 3.1), while Venus Pearl exhibited the highest microhardness values (Vickers hardness = 54.8 +/- 4.0 and 55.2 +/- 3.8, respectively). These findings indicate that Material C is more prone to color change, particularly in staining agents like wine, while Materials B and C demonstrate superior wear resistance. This study provides valuable insights for clinicians selecting composite materials based on aesthetic longevity and mechanical durability.
