Residual bone height and final bone height were found to have a statistically significant (P = 0.0002) positive correlation, with a moderate strength (r = 0.43). A negative correlation of moderate strength was observed between residual and augmented bone heights (r = -0.53, p = 0.0002). Trans-crestally performed sinus augmentations show a pattern of consistent outcomes, exhibiting minimal disparity in technique between experienced dental surgeons. Pre-operative residual bone height assessments were comparable between CBCT and panoramic radiographs.
Pre-operative CBCT scans revealed a mean residual ridge height of 607138 mm. Similar measurements from panoramic radiographs, yielding 608143 mm, showed no statistically significant disparity (p=0.535). Without incident, all cases exhibited uneventful postoperative healing. The osseointegration process for all thirty implants was successful within six months. Operator EM's final bone height was 1261121 mm, operator EG's was 1339163 mm, and the overall mean final bone height was 1287139 mm (p=0.019). Comparatively, the average post-operative bone height increase was 678157 mm, with 668132 mm and 699206 mm for operators EM and EG respectively. A p-value of 0.066 was obtained. A moderate positive correlation was observed in the relationship between residual bone height and ultimate bone height, quantified by a correlation coefficient of 0.43 and a statistically significant p-value of 0.0002. A negative correlation, of moderate strength, was observed between residual bone height and augmented bone height (r = -0.53, p = 0.0002). Trans-crestal sinus augmentation procedures consistently yield uniform results, with limited differences observed between experienced surgical clinicians. Pre-operative residual bone height evaluations were strikingly similar on both CBCT and panoramic radiographs.

Dental absence in children due to congenital agenesis, with or without syndromic features, can lead to oral dysfunctions, encompassing both systemic and socio-psychological repercussions. In this case, a 17-year-old female with severe nonsyndromic oligodontia, marked by the loss of 18 permanent teeth, presented a skeletal class III pattern. The difficulty of obtaining functional and aesthetically pleasing outcomes for temporary rehabilitation during growth and long-term rehabilitation in adulthood was substantial. This case report detailed the innovative approach to managing oligodontia, broken down into two key sections. 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. Prosthetic rehabilitation using screw-retained polymethyl-methacrylate immediate prostheses, alongside the maintenance of natural teeth for proprioception, seeks to determine the essential vertical dimensional changes needed, thus enhancing the predictability of both functional and aesthetic results. This technical note will preserve this article, addressing the intellectual workflow challenges and difficulties encountered in this specific case.

The relatively uncommon but clinically significant problem of implant component fracture can arise in the context of dental implants. The mechanical features of small-diameter implants contribute to a greater probability of complications of this type. This laboratory and FEM study aimed to compare the mechanical response of 29 mm and 33 mm diameter implants with conical connections, evaluating them under standard static and dynamic loads according to ISO 14801-2017. The finite element method was used to determine and contrast the stress distribution in the tested implant systems when a 300-Newton, 30-degree inclined force was applied. 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. Cyclic fatigue tests were conducted with gradually decreasing load magnitudes, maintaining a frequency of 2 Hertz, until three specimens endured 2 million cycles without exhibiting any signs of damage. Polymicrobial infection Analysis using the finite element method pinpointed the abutment's emergence profile as the critical stress zone, registering a maximum stress of 5829 MPa for the 29 mm implant and 5480 MPa for the 33 mm implant complex. The average maximal load experienced by 29 millimeter diameter implants was 360 Newtons, while 33 millimeter diameter implants registered an average maximum load of 370 Newtons. Autoimmune Addison’s disease The fatigue limit was determined to be 220 N and 240 N, respectively, according to the recordings. Although 33 mm diameter implants yielded superior outcomes, the variations among the tested implants were deemed clinically insignificant. A conical implant-abutment connection design, studies have shown, results in minimal stress concentration in the implant neck, ultimately boosting fracture resistance.

Long-term stability, minimal complications, satisfactory function, aesthetic appeal, and phonetic clarity combine to define a successful outcome. The documentation of a mandibular subperiosteal implant in this case report highlights a 56-year successful follow-up period. A multitude of factors contributed to the sustained success of the long-term outcome, encompassing patient selection, diligent adherence to anatomical and physiological principles, the implant and superstructure design, the precision of the surgical procedure, the application of sound restorative methods, meticulous hygiene protocols, and the consistent implementation of follow-up care. 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. This patient's journey from dental cripple to restored oral function was facilitated by the mandibular subperiosteal implant procedure. A defining moment in this case is its unprecedented duration of success, unmatched in the annals of implant treatments.

Implant-retained overdentures, anchored with a bar having a cantilever portion, experience greater bending stress on the implants located nearest to the cantilever extension under elevated posterior loading, along with increased stress within the prosthetic framework. This study explores a new abutment-bar structural connection to minimize unwanted bending moments and resulting stresses, a strategy that involves improving the bar's rotational freedom about its 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. The classical and modified models, both featuring cantilever bar extensions in the first and second molar regions, underwent finite element analysis to assess their deformation and stress distribution. Analyses were also performed on the overdenture models lacking these cantilever extensions. Real-scale models of both designs, augmented with cantilever extensions, were built, assembled onto implants nestled within polyurethane blocks, and subjected to rigorous fatigue testing. Both models' implant samples were subjected to pull-out tests. A new connection design facilitated greater rotational mobility in the bar structure, minimized bending moment effects, and reduced stress in 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.

To address dental implant-related neuropathic pain, this research seeks to establish a methodical algorithm for integrated medical and surgical interventions. The French National Authority for Health's good practice guidelines informed the methodology; the Medline database served as the source for the data. A first draft of professional recommendations, stemming from a set of qualitative summaries, has been produced by a working group. Drafts, in succession, were altered by the members of a multidisciplinary reading panel. Following an examination of ninety-one publications, twenty-six were selected to serve as the basis for the recommendations. This selection consisted of one randomized clinical trial, three controlled cohort studies, thirteen case series, and nine case reports. Should post-implant neuropathic pain manifest, a comprehensive radiographic evaluation, encompassing at least a panoramic radiograph (orthopantomogram) or ideally a cone-beam computed tomography scan, is advisable to ascertain the implant tip's positioning—more than 4 mm from the mental nerve's anterior loop for anterior implants and at least 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. Minimizing the risk of chronic pain could be achieved through a combined pharmacological approach, incorporating anticonvulsants and antidepressants. To address nerve lesions occurring during or after dental implant surgery, a course of action including potentially removing the implant (fully or partially), along with early pharmacological therapy, should begin within 36 to 48 hours.

Preclinically, bone regeneration procedures using polycaprolactone biomaterial have exhibited remarkable expedition. learn more 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. Two patients, whose cases necessitated significant ridge augmentation for dental implant procedures, were selected.