Demoiselle 2 Femme

Background/Objectives: Limited residual bone height in the atrophic posterior maxilla complicates implant placement. Transcrestal sinus elevation can be used to correct bone shrinkage after sinus pneumatization or crestal bone loss. This study evaluated a minimally invasive, one-stage transcrestal sinus lift using a double-layer crosslinked collagen scaffold (MCCS) with autogenous bone from the implant osteotomy site in patients with RBH ≤ 6 mm. Methods: In this prospective series, 11 patients (48–64 years, mean RBH 4.75 mm, SD 0.95 mm) underwent one-stage transcrestal sinus floor elevation with simultaneous implants. After osteotomy, autogenous bone chips collected during drilling were compacted into the site, and two layers of MCCS were placed under the elevated Schneiderian membrane. Buccal and palatal bone heights were measured on CBCT before and after surgery to assess vertical bone gain (ΔRBH). Results: All implants achieved stable osseointegration. Mean ΔRBH was approximately 3.1 ± 0.9 mm (combined buccal–palatal). No postoperative complications occurred. Two small Schneiderian membrane perforations were sealed intraoperatively by MCCS placement, with uneventful healing. Follow-up imaging showed maintenance of the augmented bone around the implants. Conclusions: This double-layer MCCS plus autogenous bone approach is a safe, effective, and minimally invasive transcrestal sinus lift for atrophic maxillae. It yielded crestal bone gains even with minimal initial RBH, leveraging the palatal sinus wall’s osteogenic potential and the implant’s tent-pole effect. The MCCS scaffold maintained space for bone formation and enabled immediate sealing of any membrane perforations. This one-stage protocol is viable for implant placement in low-RBH sites.

Structural monitoring can serve as a valuable tool to help manage risk of failure or damage during construction in close proximity to existing buildings and infrastructure. However, the success of monitoring solutions can depend heavily on the relationship between the client and the specialty engineer engaged for system design and implementation. This paper explores the challenges and successes experienced during two adjacent construction structural monitoring projects in the Chicagoland area that occurred concurrently. In one case, the client was the project owner who had a vested interest in avoiding potential loss and litigation. In the other case, the client was a contractor who was required to conduct monitoring to meet a specification. The cases will highlight differences between the engaged stakeholder with a performance requirement and the client meeting a prescriptive requirement. Therefore, the authors will discuss the importance of understanding the engagement level of the client in order to calibrate the value proposition. On one end of the spectrum, the specialty engineer becomes a partner and trusted advisor of the client in implementing a risk management solution. On the other end of the spectrum, the specialty engineer must focus on being a provider of the most economical, practical, and technically correct solution, without gold-plating. Tools and techniques applied in each case will be discussed and lessons learned will be explored.

Adolescence is a precarious time in the development of girls. Faced with the complexities of biological changes, self-awareness, and family and peer relationships, the realities of trauma often amplify the need for social and emotional support. Statistical data and brain research reveal that girls are more prone to trauma and express the effects of trauma more often than boys. The impact of trauma can be physiological and psychological, from development through adulthood. The results of recent studies have led researchers to challenge the elasticity and resilience of girls because of the systemic and familial blows of trauma experienced by girls within certain socio-ecological environments. Socio-ecological breakdown has heightened girls’ vulnerability to adverse childhood experiences (ACEs) and the frequency in which they encounter them, and ACEs are known to increase the difficulties of achieving wellness. The strength of the socio-ecological environments surrounding girls can prevent and buffer the negative trajectories of childhood trauma. Gender-responsive approaches play a critical role in reducing the lasting effects of trauma, and a network of specialized practitioners can restore balance to socio-ecological environments affected by trauma. Practitioners can take on the role of “socio-surgeons” and, through a gender-responsive lens, can redirect the course of girls by utilizing strategies that are strength and relationship based, trauma informed, culturally competent, and holistic.

It has been more than 20 years since ASTM International last held a symposium focusing on cement analysis and/or concrete petrography, when ASTM published the Selected Technical Papers (STP) 1215, Petrography of Cementitious Materials. Analytical technology has advanced significantly and many new supplementary cementitious materials have since emerged; as such, it is time to have an overview of the state of the art of development in fields related to cement analysis and concrete petrography.

Abstract An evaluation of the exhaust emissions from a compression ignition engine for fuels composed of 100 and 30% methyl esters of soy oil (SME) is described. These fuels were compared with a low‐sulfur, petroleum #2 diesel fuel in a Caterpillar 3304, prechamber, 75 kW diesel engine, operated over heavy‐ and light‐duty transient test cycles developed by the United States Bureau of Mines. More than 60 h of testing was performed on each fuel. The objective was to determine the influence of the fuels upon diesel particulate matter (DPM) and gaseous emissions. The effect of a modern diesel oxidation catalyst (DOC) also was determined in an effort to minimize emissions. Neat SME produced a higher volatile fraction of the DPM, but much less carbon soot fraction, leading to overall DPM reductions of 23 to 30% for the light‐ and heavy‐duty transients. The DOC further reduced the volatile fraction and the total DPM. The SME fuel reduced gaseous emissions of CO by 23% and hydrocarbons by over 30% without increasing NOx. The DOC further reduced CO and hydrocarbon levels. Mutagenicity of the SME exhaust was low. Results indicate that SME fuel, used with a proper DOC, may be a feasible emission reduction technology for underground mines.