A positive correlation of moderate strength was observed between residual bone height and ultimate bone height (r = 0.43, P = 0.0002). A statistically significant (p = 0.0002) moderate negative correlation was found between residual bone height and augmented bone height (r = -0.53). Sinus augmentations performed trans-crestally show a pattern of similar outcomes among experienced clinicians, indicating minimal inter-operator variability. CBCT and panoramic radiographs delivered comparable readings for pre-operative residual bone height.
Mean residual ridge height, evaluated pre-operatively using CBCT, exhibited a value of 607138 mm. This measurement closely matched the 608143 mm result obtained from panoramic radiographs, with no statistically discernible difference (p=0.535). All patients experienced a smooth and uncomplicated postoperative healing process. The osseointegration process for all thirty implants was successful within six months. The final average bone height was 1287139 mm, ranging from 1261121 mm to 1339163 mm, for operators EM and EG, 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 exhibited a moderately positive correlation, as indicated by a correlation coefficient of 0.43 and a statistically significant p-value of 0.0002. The correlation between augmented bone height and residual bone height showed a moderate negative relationship, supported by a statistically significant result (r = -0.53, p = 0.0002). The outcomes of sinus augmentation procedures, performed trans-crestally, are consistent and exhibit minimal inter-operator differences amongst experienced clinicians. In evaluating pre-operative residual bone height, CBCT and panoramic radiographs produced virtually identical results.
Children with congenitally missing teeth, syndromic or not, may experience oral impairments, resulting in potential general health issues and socio-psychological problems. 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. The provision of both functional and aesthetically pleasing results in temporary rehabilitation during growth and long-term rehabilitation in adulthood was a challenging endeavor. This case study showcases the innovative procedure for managing oligodontia, presented in two key parts. Simultaneous parietal and xenogenic bone grafting, in conjunction with LeFort 1 osteotomy advancement, is employed to increase bimaxillary bone volume, facilitating future implant placement in the absence of adjacent alveolar process growth. To achieve predictable functional and aesthetic results, prosthetic rehabilitation involves the use of screw-retained polymethyl-methacrylate immediate prostheses. This approach incorporates the conservation of natural teeth for proprioception and helps evaluate the needed vertical dimensional changes. This article concerning intellectual workflows and the specific challenges encountered in this instance could be useful as a technical note for future management.
While not a common occurrence, a fracture of any implant component within a dental implant presents a clinically relevant problem. Small-diameter implants, owing to their mechanical attributes, face an elevated risk of such adverse outcomes. This investigation, involving both laboratory and FEM methodologies, sought to differentiate the mechanical behavior of 29 mm and 33 mm diameter implants, equipped with conical connections, under controlled static and dynamic conditions, in accordance with the ISO 14801-2017 specifications. A comparative analysis of stress distribution in the tested implant systems, subjected to a 300 N, 30-degree inclined force, was conducted using finite element analysis. The static testing procedure involved a 2 kN load cell and applied the force at a 30-degree angle to the implant-abutment axis, using a lever arm of 55 mm on the experimental samples. Fatigue tests were conducted at a rate of 2 Hz and a decreasing load until 3 specimens completed 2 million cycles without suffering any damage. asthma medication The finite element analysis identified the emergence profile of the abutment as the location of maximum stress; specifically, 5829 MPa for the 29 mm diameter implant and 5480 MPa for the 33 mm diameter implant complex. The mean maximum load measured 360 N for implants with a diameter of 29 mm, and 370 N for those with a diameter of 33 mm. see more Data indicated a fatigue limit of 220 N and a fatigue limit of 240 N, respectively. Favorable results were obtained with 33 mm diameter implants, yet the difference between the implants under examination was clinically negligible. The design of the implant-abutment connection, a conical shape, potentially leads to reduced stress in the implant neck, and consequently, heightened fracture resistance.
A positive outcome is judged based on satisfactory function, aesthetic appeal, clear phonetics, long-term stability, and few complications. This mandibular subperiosteal implant case report details a remarkable 56-year successful follow-up. The prolonged success of the outcome was linked to numerous factors, specifically the selection of the appropriate patient, the conscientious observance of anatomical and physiological principles, the innovative design of the implant and superstructure, the execution of the surgical procedure with precision, the application of evidence-based restorative methods, diligent oral hygiene, and the disciplined implementation of re-care protocols. The patient's persistent compliance, alongside the intense cooperation and meticulous coordination of the surgeon, restorative dentist, and lab technicians, are central to this successful case. By executing treatment with a mandibular subperiosteal implant, this patient overcame their predicament as a dental cripple. The most notable aspect of this case is its record-breaking duration of successful implant treatment, unequaled in any previous historical record.
Overdentures supported by implants and possessing a bar with a cantilever extension, when bearing heavier posterior loads, incur amplified bending moments in the proximal implant area coupled with increased stress throughout the overdenture structure. This research presented a fresh abutment-bar structural connection, engineered to minimize undesirable bending moments and the subsequent stresses, through augmenting the rotational movement of the bar assembly on the supporting abutments. To modify the bar structure's copings, two spherical surfaces were added, their shared center coinciding with the centroid of the coping screw head's top surface. By integrating a novel connection design, a four-implant-supported mandibular overdenture was transformed into a modified 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. Using real-scale dimensions, prototypes of both models, equipped with cantilever extensions, were constructed, then assembled on implants embedded in polyurethane blocks, and subsequently put through fatigue tests. Pull-out tests were performed on the implants of both models. The new connection design improved the rotational freedom of the bar structure, significantly minimized the influence of bending moments, and reduced stress on both cantilevered and non-cantilevered peri-implant bone and overdenture components. 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.
This study seeks to formulate an algorithm for the combined medical and surgical treatment of neuropathic pain specifically caused by dental implants. The methodology adhered to the best practices of the French National Health Authority, and the Medline database was examined for relevant data. A working group has presented a first draft of recommendations that aligns with a collection of qualitative summaries. The members of an interdisciplinary reading committee revised the successive drafts. Out of a total of ninety-one screened publications, twenty-six were selected to inform the recommendations. These selections included one randomized clinical trial, three controlled cohort studies, thirteen case series, and nine case reports. Neuropathic pain following implant placement necessitates a comprehensive radiological assessment, including a minimum of a panoramic radiograph (orthopantomogram) or a cone-beam computed tomography scan, to ascertain that the implant tip is positioned securely, exceeding 4 mm from the anterior loop of the mental nerve for anterior implants and 2 mm from the inferior alveolar nerve for posterior implants. It is advisable to initiate high-dose steroid therapy promptly, possibly concurrently with either partial or total implant removal, ideally within the 36-48 hour timeframe post-implantation. Employing a combined pharmacological treatment, consisting of anticonvulsants and antidepressants, could help to curb the risk of chronic pain becoming persistent. When a nerve lesion is observed subsequent to dental implant surgery, treatment, encompassing possible removal of the implant (partially or fully) and early medicinal intervention, must begin within 36 to 48 hours.
Polycaprolactone, as a biomaterial, has proven its efficiency in preclinical settings for bone regeneration procedures, showcasing its speed. multi-strain probiotic The two clinical cases presented in the posterior maxilla exemplify the first clinical application of a custom-designed 3D-printed polycaprolactone mesh for alveolar ridge augmentation. Among the candidates for dental implant therapy, two patients who needed extensive ridge augmentation procedures were identified.