The correlation between residual bone height and the ultimate bone height was found to be moderately positive (r = 0.43) and statistically significant (P = 0.0002). A moderate inverse correlation (r = -0.53) was established between residual bone height and augmented bone height, reaching statistical significance (p = 0.0002). Trans-crestally performed sinus augmentations consistently yield favorable outcomes, with minimal variability in results between skilled clinicians. Similar evaluations of pre-operative residual bone height were obtained using both CBCT and panoramic radiographs.
CBCT pre-operative measurements of mean residual ridge height displayed a reading of 607138 mm. This finding correlated well with the analogous measurement of 608143 mm from panoramic radiographs, and the disparity was statistically insignificant (p=0.535). In every instance, the postoperative recovery process proceeded without any complications. Six months post-implantation, all thirty implants had achieved successful osseointegration. Across all operators, the mean final bone height averaged 1287139 mm; specifically, operators EM and EG recorded 1261121 mm and 1339163 mm, respectively (p=0.019). The mean post-operative bone height gain was 678157 mm, equivalent to 668132 mm for operator EM and 699206 mm for operator EG, resulting in a p-value of 0.066. Residual bone height and final bone height were found to be moderately positively correlated, as measured by a correlation coefficient of 0.43, with a highly significant p-value (p=0.0002). Residual bone height and augmented bone height exhibited a moderately negative correlation (r = -0.53, p = 0.0002). Trans-crestally performed sinus augmentations consistently produce predictable results with little variation among experienced clinicians. Pre-operative residual bone height assessments were comparable using both CBCT and panoramic radiographs.

Congenital tooth agenesis, a condition affecting children, whether or not part of a larger syndrome, can lead to oral difficulties with significant consequences for the child's physical and socio-psychological development. In this case, a 17-year-old girl demonstrated severe nonsyndromic oligodontia, which resulted in the loss of 18 permanent teeth, as well as a class III skeletal structure. Providing results that were both functional and aesthetically pleasing for temporary rehabilitation during growth and long-term rehabilitation in adulthood proved to be quite demanding. The report on this case exemplifies the novel steps in oligodontia treatment, divided into two main sections for clarity. To achieve a larger bimaxillary bone volume, the LeFort 1 osteotomy advancement procedure is performed concurrently with parietal and xenogenic bone grafting, ensuring that adjacent alveolar processes can continue to grow without impeding future implant placement. The use of screw-retained polymethyl-methacrylate immediate prostheses in prosthetic rehabilitation, in conjunction with the preservation of natural teeth for proprioception, enables the evaluation of needed vertical dimensional changes, leading to more predictable functional and aesthetic results. Preserving this article as a technical note allows for the intellectual workflow management of similar cases, documenting the difficulties encountered.

The infrequent but clinically pertinent issue of fracture within any dental implant component is a potential complication. The mechanical properties of small-diameter implants predispose them to a higher incidence of such complications. The objective of this laboratory and FEM investigation was to assess and contrast the mechanical properties of 29 mm and 33 mm diameter implants with conical connections subjected to standard static and dynamic stresses, as specified by ISO 14801-2017. Finite element analysis examined how stress was distributed across the tested implant systems under a 300 N force applied at a 30-degree incline. Static tests on experimental samples were performed using a load cell rated at 2 kN, with a force applied at an angle of 30 degrees from the implant-abutment axis, along a 55 mm lever arm. At 2 Hz, fatigue tests involved progressively lessening loads, and continued until three specimens survived 2,000,000 cycles without any indications of damage. MUC4 immunohistochemical stain In the finite element analysis, the abutment's emergence profile manifested as the area experiencing the highest stress levels; 5829 MPa for the 29 mm diameter implant and 5480 MPa for the 33 mm diameter implant complex. A 29mm diameter implant exhibited a mean maximum load of 360 Newtons, contrasting with the 370 Newtons observed for the 33mm diameter implant. Biomass pretreatment The respective fatigue limits were ascertained to be 220 N and 240 N. While 33 mm implants displayed promising results, the distinction between the different implant types was found to be clinically inconsequential. This is potentially a consequence of the conical design of the implant-abutment connection; this design pattern has been documented to yield low stress in the implant neck, thus reinforcing its resistance to fracture.

A successful outcome is characterized by satisfactory function, aesthetically pleasing design, phonetically sound characteristics, long-term stability, and a minimum of complications. This case report describes a mandibular subperiosteal implant that has achieved a successful follow-up spanning 56 years. Success in the long term was a consequence of many factors, including careful patient selection, adherence to essential anatomical and physiological knowledge, the superior design of the implant and superstructure, meticulous surgical technique, the application of appropriate restorative principles, scrupulous hygiene, and a well-structured re-care schedule. The surgeon, restorative dentist, laboratory technical staff, and the patient's unwavering compliance exemplify the intense cooperation and coordination crucial to this case's success. Employing the mandibular subperiosteal implant technique, this patient emerged from their former state as a dental cripple and regained oral health. The most important element of this case is the fact that it represents the longest confirmed period of success in the history of any type of implant treatment.

Implant-supported bar-retained overdentures with cantilever extensions, subjected to heightened posterior loading, experience amplified bending moments on the implant abutments adjacent to the cantilever and increased stress within the prosthetic components. Employing a new abutment-bar structural connection, this study investigated how to minimize bending moments and the associated stresses by facilitating enhanced rotational mobility of the bar on the abutment points. For the bar structure, the copings were altered to include two spheres, their shared center positioned at the centroid of the coping screw head's upper surface. To achieve a modified overdenture, a novel connection design was implemented on a four-implant-supported mandibular overdenture. Deformation and stress distribution in both the classical and modified models, each boasting bar structures with cantilever extensions placed in the first and second molar areas, were scrutinized using finite element analysis. This approach was also used to examine the overdenture models without these cantilever bar extensions. Prototypes of both models, featuring cantilever extensions, were created at real-scale, assembled onto implants set within polyurethane blocks, and then put through fatigue tests. Pull-out tests were performed on the implants of both models. The rotational mobility of the bar structure was expanded, bending moment effects were decreased, and stress in the peri-implant bone and overdenture components, whether cantilevered or not, was lessened by the new connection design. Our research conclusively confirms the effects of bar rotational mobility on abutments, thereby validating the critical role of the abutment-bar connection geometry in structural design.

The purpose of this investigation is to create a method for treating dental implant-related neuropathic pain using a combination of medical and surgical approaches. Based on the good practice guidelines set forth by the French National Authority for Health, the methodology was developed, with data sourced from the Medline database. Following a series of qualitative summaries, a working group has formulated an initial draft of professional recommendations. The members of an interdisciplinary reading committee revised the successive drafts. Eighty-one publications were not selected; the twenty-six publications chosen included one randomized clinical trial, three controlled cohort studies, thirteen case series, and nine case reports, comprising the evidence base for the recommendations. When post-implant neuropathic pain is suspected, a rigorous radiological evaluation, using at least a panoramic radiograph (orthopantomogram) or a cone-beam computed tomography scan, is highly recommended to ensure the implant tip is appropriately positioned more than 4 mm away from the anterior loop of the mental nerve for anterior implants and 2 mm away from the inferior alveolar nerve for posterior implants. Prompt administration of a high steroid dosage, possibly in conjunction with either partial or complete implant removal ideally within the first 36 to 48 hours following implantation, is recommended. Employing a combined pharmacological treatment, consisting of anticonvulsants and antidepressants, could help to curb the risk of chronic pain becoming persistent. A nerve lesion consequent to dental implant surgery necessitates treatment within 36 to 48 hours, involving possible implant removal (partial or complete) and immediate pharmacologic intervention.

Polycaprolactone, a biomaterial, has demonstrated swiftness in preclinical trials of bone regenerative procedures. learn more This report, featuring two case studies from the posterior maxilla, is the first to report the clinical application of a customized 3D-printed polycaprolactone mesh in alveolar ridge augmentation. Due to the need for extensive ridge augmentation, two patients were chosen for dental implant treatment.