Background The overlying maxillary sinus frequently restrains the height of the posterior maxillary bones. Purpose Evaluating the effect of downsizing the antrostomy side‐window on the stability of the installed implants and vertical bone gain, after employing a graftless antral membrane balloon elevation (AMBE). Materials and methods The study is a randomized controlled clinical trial conducted on 20 patients with 30 deficient maxillary alveolar ridges underwent graftless (AMBE) after being allocated into a (5 mm) entry antrostomy group (the test group) and a (10 mm) entry antrostomy group (the control group) implementing a radiographic linear bone height and implant stability quotations (ISQ) comparison among both groups immediately after the placement of 38 Implants and 6 months after. Results Radiographic bone gain of the test group (5.55 ± 0.93 mm) was significantly higher than the control group (2.86 ± 0.60 mm) (p <0.001). There was no significant difference in primary stability between the test (65 ± 5.32) and control groups (62.67 ± 4.46) (p = 0.202); while the test group (73.43 ± 4.39) showed significantly higher secondary stability than the control group (64.83 ± 6.05) (p <0.001). ISQ values recorded at 6 months were significantly higher than those recorded at insertion in the test group (p <0.001), while they were insignificant in the control group (p = 0.148). Conclusion Undersizing the antrostomy window deemed beneficial concerning the vertical bone gain and the simultaneously placed root form dental implants' secondary stability.

Background Following free fibula flaps (FFF) reconstruction of mandibular defects the patients need an early dental rehabilitation to regain their masticatory function and enhance their feeding and nutrition. Methods This study included 10 patients, with mandibular defects previously reconstructed with FFF that span the area between the two mandibular angles. They received a full arch fixed restoration supported by four implants using a pilot drilling guide to perform a flapless operation. The stability of the placed dental implants was assessed along with the changes in bone density. Results There was a statistically significant increase in stability after 3 and 6 months, and there was a decrease in density after 6 months. The patient satisfaction improved over the follow‐up period. Conclusion The All‐on‐Four technique is reliable and economic for early functional rehabilitation of resected jaws reconstructed with FFF; however, further studies are needed to investigate the changes in fibula bone density over time and with function.

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To determine the outcome of dental implants inserted immediately in chronically infected sites. Patients and methods: 40 implants were inserted immediately in chronically infected sites. Results: Implants were successfully osseo-integrated with a success rate exceeding 90%. Summary and conclusion: Using the proper protocol to ensure proper debridement of residual infection, Implants can be successfully inserted immediately in chronically infected sites.

To examine the outcome of graftless sinus floor elevation with simultaneous implant placement. Patients and methods: 18 implants were inserted with simultaneous implant placement in grafted versus non grafted sinus lifting. Results: Comparable results were obtained from both groups regarding the quality and stability of the newly formed bone. Summary and conclusion: Graftless sinus lifting with simultaneous implant placement is a predictable technique.