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The Serendipitous Discovery of Rollover Cyclometalation: From Unrecognized Observation to Transformative Chemistry

Rollover cyclometalation is a distinctive variant of classical cyclometalation where a chelated heterocyclic ligand undergoes internal rotation, releasing one donor atom from coordination and subsequently activating a remote C─H bond with high regioselectivity. The resulting rollover complexes bear an uncoordinated donor atom that confers unique reactivity unavailable to conventional cyclometalated species. The discovery of rollover cyclometalation represents a remarkable example of seren...

Key points in orbital reconstruction

Orbital fractures represent the most challenging fractures of the facial skeleton to treat. Decision making in the management of patients with orbital fractures is often demanding, requiring experience and profound knowledge of the anatomical and functional aspects of this anatomical region. The complex anatomy and functionality of the orbital area, along with the limited visibility of the surgical field and the extreme surgical precision required, make the reconstruction of this region extre...

Long-Term Survival of a Maxillary Subperiosteal Implant After Blast Injury: A 17-Year Follow-Up Case Report

Subperiosteal implants (SPIs) have re-emerged as a treatment option for the rehabilitation of patients with severe maxillary atrophy, although evidence on their long-term performance remains limited. We report the case of a 53-year-old female patient who underwent maxillary rehabilitation with a custom subperiosteal implant in 2006 due to insufficient bone volume for conventional endosseous implant placement. The implant was fabricated using a direct bone impression technique and designed to ...

Complications and management of modified custom-made subperiosteal implants in severely atrophic maxilla and mandible: a retrospective cohort of 211 implants

: Modified custom-made, additively manufactured subperiosteal implants incorporating guided crestal boneoplasty for abutment housing have re-emerged as a graftless option for selected patients with severe jaw atrophy. This study evaluated the incidence, timing, severity, and management of complications in a large consecutive cohort. A retrospective analysis was conducted on 124 patients who received 211 titanium custom-made subperiosteal implants between 2018 and 2025 at a single maxillofacia...

Mapping the Synaptome in Neurodegeneration: Emerging Clinical Applications of SV2A PET Imaging

Synaptic loss is a core pathological feature of neurodegenerative disorders and closely relates to cognitive and functional decline. Positron emission tomography (PET) targeting synaptic vesicle glycoprotein 2A (SV2A) has recently emerged as a promising tool for the indirect assessment of presynaptic alterations in the living human brain. This leading article discusses the evolving clinical landscape of SV2A PET across the neurodegenerative spectrum, emphasizing its translational trajectory a...

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