Background: Evidence on the use of low-level laser photobiomodulation in immediate implant placement is limited. The study aimed at describing the outcomes of low-level laser biostimulation for immediate implant placement in the maxillary premolars zone.Materials and methods: The study was conducted on 10 patients with unrestorable maxillary premolars with Type-I socket. Patients received immediate implant with laser bio stimulation. Implant stability were appraised using radiofrequency analysis. Radiographic evaluation was conducted for the analysis of bone density.Results: Implant stability analysis showed a significant improvement in the reported secondary stability values in the irradiated implants. None of the irradiated patients reported clinical or wound healing complications. A 14.30% increase in the secondary implant stability, and 19.71% increase in the calculated mean bone density was reported.Conclusion: Laser Bio stimulation presented favorable secondary implant stability outcomes with only bipartite photo biomodulation sessions. Furthermore, the radiographic assessment showed consistent and predictable outcomes.
Background: The consecutive evolution of guided tooth preparation concept, along with monolithic translucent zirconia systems for Computer-Aided Design and Manufacturing (CAD-CAM) technologies, have allowed for virtual, minimally invasive treatment plan.Purpose: The aim was to reproduce and objectively evaluate the quality of virtually guided minimally invasive preparation.Methods: A typodont model with a missing lower first molar was 3D scanned. Grouping was according to preparation mode: Group I:(n=10) virtually guided minimally invasive with 0.5 mm finish line, 6º axial taper, and were guided by a 3D printed occlusal template, and Group II:(n=1) reference virtual preparation following the same minimally invasive parameters. Using reverse engineering (RE), the as-received group I was compared to the reference Group II to test its quality. After correction, the final guided preparations underwent assessment of undercuts, margin width, and the axial taper angle. The data obtained were analyzed statistically.Results: Group I was free from undercut and had a common path of insertion. There was no statistically significant difference between the overall practically practiced value mean (μ̅) of group I (0.5146±0.01755 for molars and 0.5217 ± 0.04655 for premolars) and the hypothesized reference mean (μ0) of margin thickness of group II (0.50575 for molars, 0.482 for premolars). There was no statistically significant difference between (μ̅) (6.5502±0.3939ºfor molars, 6.427±0.3305º for premolars) and (μ0) of axial taper (6.231ºfor molars, 6.35025ºfor premolars).Conclusions: Virtually guided preparation may help to enhance manual tooth preparation quality with the least amount of tooth reduction while permitting convenient restorative space.
Introduction: Surgical removal of impacted third molars is a commonly applied oral surgery operation. It can be quite discomforting for the patients because of postoperative complications, such as bleeding, pain, swelling, trismus, wound dehiscence, and alveolar osteitis. Many attempts have been made to reduce those complications, and the use of various flap designs have been investigated. Aim of the study: to evaluate the effect of flap designs, Envelope Flap (EF) and Modified Triangular Flap (MTF) on postoperative pain and soft tissue healing after mandibular wisdom tooth extraction. Materials and Methods: Twenty patients with unilateral impacted third molars completed the study with an envelope flap and a modified triangular flap design for third molar removal. Clinical parameters, including pain and soft tissue healing, were assessed postoperatively. Results: The VAS percentage decrease (%) was statistically significantly better (more decrease) in the Envelope Flap group than in the Modified triangular flap group. The Healing Index was statistically significantly higher in the Modified Triangular Flap Group compared with the Envelope Flap Group postoperatively. Conclusion: The study revealed that the modified triangular flap had higher postoperative healing compared with the envelope flap, although the envelope flap had lower postoperative pain scores.
Various material combinations in telescopic implant-retained overdentures have been investigated as primary and secondary crowns to improve their stability, biocompatibility, and peri-implant tissue health.Aim: this study was conducted to understand how various materials influence peri-implant conditions, which is important for the success of telescopic implant-retained mandibular overdentures. Methods: Twelve completely edentulous patients were included in this study. Every patient received two implants in the canine region bilaterally to retain mandibular overdentures with milled telescopic crowns. The primary crowns were milled from pre-milled titanium abutments. The participants were randomly assigned to two groups based on the material used for the construction of the secondary crowns: the CoCr group, which utilized milled cobalt-chromium alloy, and the PEEK group, which used milled polyether-etherketone. Bleeding on Probing (BOP) and Gingival Index (GI) were evaluated at baseline (0 months), 6, 9, and 12 months post prosthetic loading. The assessments of BOP and GI scores were conducted using a single coded periodontal probe and visually, respectively. Results At baseline,6 months, 9 months, and 12 months, there were no statistically significant differences in bleeding on probing and gingival index scores between the CoCr and PEEK groups. Conclusion: No statistically significant differences in peri-implant health outcomes regarding BOP and GI between the CoCr and PEEK groups when utilized as secondary crowns in implant-retained overdentures after 1-year post-prosthetic loading indicating that both materials may be acceptable for use in telescopic implant-retained overdentures regarding peri-implant soft tissue health.
Introduction: Although the remaining ceramic buttons can be recycled and repressed after pressing, the shear bond strength of repressed ceramic to resin cement is still unknownObjectives: To evaluate the effect of additional pressing on shear bond strength of lithium disilicate to a dual cure resin cement. Materials and methods: Twenty-four Ceramic specimens (Ø10*2mm) were fabricated by pressing and additional pressing of Lithium disilicate (LDS) (n=12). Hydrofluoric acid etching and silane coupling agent were used to make surface treatment of the specimens. Twenty-four composite discs (Ø3*3) were cemented to the specimens with a dual cure resin cement. Thermocycling was performed for 2000 cycles. The specimens were subjected to shear force in a universal testing machine till failure. The failed specimens were examined by Stereomicroscope to investigate the mode of failure. Results:. SBS of the repressed group 9.32 (3.24) MPa was slightly higher than the pressed group 8.44 (2.44) MPa with no statistically significant difference (p=0.46). Conclusion: SBS of lithium disilicate was not affected by additional pressing
