Residual bone height and final bone height demonstrated a statistically significant (P = 0.0002) moderate positive correlation (r = 0.43). There was a moderately negative correlation between residual bone height and the augmented bone height, as evidenced by the correlation coefficient (r = -0.53) and statistical significance (p = 0.0002). Trans-crestally performed sinus augmentations consistently yield favorable outcomes, with minimal variability in results between skilled clinicians. Both CBCT and panoramic radiographs demonstrated a consistent assessment of pre-operative residual bone height.
Pre-operative CBCT assessments of the mean residual ridge height showed a value of 607138 mm. Correspondingly, panoramic radiograph analysis produced a similar result, 608143 mm, revealing no statistically significant discrepancy (p=0.535). No issues were encountered during the postoperative healing process in any case. The osseointegration of all thirty implants was successfully completed by the end of the six-month period. A mean final bone height of 1287139 mm was observed, with operators EM and EG showing values of 1261121 mm and 1339163 mm, respectively (p=0.019). The average post-operative bone height gain was 678157 mm, with a p-value of 0.066. Operator EM's gain was 668132 mm and operator EG's gain was 699206 mm. 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). Statistically significant (p = 0.0002) moderate negative correlation was observed between the residual bone height and the augmented bone height, with a correlation coefficient of r = -0.53. Consistent results are observed in trans-crestally performed sinus augmentations, with negligible differences in outcomes between experienced surgical personnel. A similar pre-operative residual bone height assessment was obtained via both CBCT and panoramic radiographs.
Congenital absence of teeth, whether syndromic or not, in children can result in oral dysfunction, impacting overall well-being and potentially causing socio-psychological issues. The subject of this case was a 17-year-old girl suffering from severe nonsyndromic oligodontia, a condition causing the loss of 18 permanent teeth, and exhibiting a class III skeletal pattern. It was not an easy task to achieve functional and aesthetically pleasing outcomes for temporary rehabilitation during growth and for long-term rehabilitation later in life. This case report illustrates a novel approach to oligodontia treatment, described in two primary segments. Improving the large bimaxillary bone volume by utilizing LeFort 1 osteotomy advancement with concurrent parietal and xenogenic bone grafting will allow for the implantation procedure earlier in the future without affecting the growth of the adjacent alveolar processes. Polymethyl-methacrylate immediate prostheses, retained by screws and used in prosthetic rehabilitation, alongside preserving natural teeth for proprioceptive purposes, provide a way to assess the required vertical dimensional changes, aiming at improving the predictability of both aesthetic and functional results. In order to understand and manage this type of case within the intellectual workflow, the difficulties highlighted in this article could be collected as a technical note.
Implant component fractures, while comparatively rare among dental implant complications, represent a clinically significant concern. Due to their inherent mechanical design, implants with small diameters are more susceptible to complications of this nature. This study, encompassing both laboratory and FEM analysis, aimed at comparing the mechanical performance of 29 mm and 33 mm diameter implants with conical connections under standard static and dynamic loads, adhering to the protocols outlined in ISO 14801-2017. The stress distribution on the tested implant systems subjected to a 300 N, 30-degree inclined force was contrasted via finite element analysis. Static tests on the experimental samples incorporated a 2 kN load cell; the force was exerted at a 30-degree angle to the implant-abutment axis via a lever arm of 55 mm. Load-decreasing fatigue tests, operating at a 2 Hz frequency, were carried out until three specimens successfully completed 2 million cycles without sustaining any structural damage. wilderness medicine Finite element analysis revealed the abutment's emergence profile as the area of highest stress, reaching 5829 MPa for a 29 mm implant diameter and 5480 MPa for a 33 mm diameter complex. 360 Newtons was the mean maximum load for 29 mm diameter implants; 33 mm diameter implants, conversely, registered a mean maximum load of 370 Newtons. find more Recorded fatigue limits were 220 N and 240 N, respectively, based on the observations. The 33 mm implants performed better overall, however the differences between the tested implants were considered to be clinically negligible. A conical implant-abutment connection design, studies have shown, results in minimal stress concentration in the implant neck, ultimately boosting fracture resistance.
Metrics for a successful outcome encompass satisfactory function, aesthetic appeal, clear phonetics, prolonged stability, and a low incidence of complications. This case report documents a mandibular subperiosteal implant, achieving a remarkable 56-year successful follow-up period. The long-term favorable outcome was the product of multiple contributing factors, including patient selection, rigorous adherence to anatomical and physiological principles, well-conceived implant and superstructure design, the skill of the surgical procedure, the implementation of appropriate restorative techniques, diligent oral hygiene, and a systematic re-care regimen. Exceptional cooperation and coordination between the surgeon, restorative dentist, lab technicians, and the patient's enduring compliance characterized this case. The mandibular subperiosteal implant treatment successfully liberated this patient from their dental dependency. The case's most significant aspect is its status as the longest-running successful implant treatment in documented history.
In implant-supported bar-retained overdentures featuring cantilever bars, higher posterior loads result in elevated bending moments on the implants nearest the cantilever, and concomitant increased stress on the overdenture's constituent parts. This study details the introduction of a novel abutment-bar connection, designed to minimize undesirable bending moments and their consequent stresses, accomplished by boosting the rotational movement of the bar on its supporting abutments. 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. A four-implant-supported mandibular overdenture underwent a modification using a novel connection design, resulting in a customized overdenture. Finite element analysis was used to examine the deformation and stress patterns in both the classical and modified models, each possessing cantilever bar structures in the first and second molar regions. Equivalent analyses were conducted for the overdenture models, devoid of cantilever bar extensions. To assess their durability, real-scale prototypes of both models, incorporating cantilever extensions, were constructed, mounted on implants embedded in polyurethane blocks, and put through fatigue tests. The pull-out testing procedure was applied to the implanted devices of both models. The innovative connection design resulted in enhanced rotational freedom for the bar structure, mitigating bending moments and lessening stress within the peri-implant bone and overdenture components, regardless of their cantilever status. Our investigation demonstrates the effects of the bar's rotational mobility on the abutments, thereby confirming the significance of the abutment-bar connection geometry as a key structural design parameter.
The research endeavors to create a protocol for the medicosurgical management of dental implant-induced neuropathic pain. The French National Authority for Health's good practice guidelines informed the methodology; the Medline database served as the source for the data. A working group has crafted an initial set of professional recommendations, mirroring a collection of qualitative summaries. Members of the interdisciplinary reading committee amended the sequentially produced drafts. From a pool of ninety-one publications, twenty-six were selected as foundational for the recommendations, including one randomized clinical trial, three controlled cohort studies, thirteen case series, and nine case reports. For the prevention of post-implant neuropathic pain, a thorough radiological examination, at least using a panoramic radiograph (orthopantomogram) or preferably a cone-beam computed tomography scan, is required to precisely determine the implant tip's distance, ensuring it is placed more than 4 mm from the mental nerve's anterior loop for anterior implants and 2 mm from the inferior alveolar nerve for posterior implants. Preferably within the first 36 to 48 hours after implantation, an early high-dose steroid regimen, possibly accompanied by partial or complete implant removal, is recommended. A dual pharmacological approach, involving anticonvulsants and antidepressants, could potentially lessen the chance of chronic pain becoming entrenched. Dental implant surgery-related nerve lesions require prompt treatment within 36 to 48 hours post-implant, including potential complete or partial implant removal, and concurrent pharmacological intervention.
Preclinically, polycaprolactone's performance as a biomaterial for bone regeneration is notable for its speed. medical clearance Two clinical cases in the posterior maxilla form the basis of this report, which details the inaugural clinical use of a custom-made 3D-printed polycaprolactone mesh for alveolar ridge augmentation. Two patients whose dental implant procedures required extensive ridge augmentation were selected.