Factors Predicting Removals of the Levonorgestrel-Releasing Intrauterine System in an Adolescent Cohort.

Objective: Use of 52-mg levonorgestrel intrauterine system (LNG-IUS) in adolescents for heavy menstrual bleeding (HMB), dysmenorrhea, and contraception has increased, yet little is known about the factors predicting removal and dissatisfaction in adolescents. The aim of this study was to identify factors predicting LNG-IUS removal in adolescents.

Methods: This was a retrospective cohort study including all adolescents (9-19 years) who underwent LNG-IUS insertion between 2012 and 2021 (n = 536).

Intimate partner violence education in Australian medical schools: has anything changed?

Objectives: To describe current intimate partner violence (IPV) education delivery to Australian medical students, and the barriers influencing this delivery, including any changes in the quantity and nature of IPV education delivery since 2010.

Methods: A cross-sectional analysis of Australian medical schools providing primary medical degrees was conducted by identifying one staff member, from each of the disciplines of general practice, obstetrics and gynaecology, paediatrics, and where necessary, medical education, to complete an online survey.

Results: Sixteen of the 17 medical schools provided IPV education, typically within the general practice or obstetrics and gynaecology curriculum.

Postoperative discomfort after implant placement according to the All-on-4 concept with or without Zygoma implants: A prospective clinical study.

Objectives: The purpose of the study was to assess patients' postoperative discomfort after implantations according to the All-on-4 concept with and without using Zygoma implants.

Material And Methods: Three treatment groups were formed for this prospective study: All-on-4 rehabilitation in the maxilla (group 1, N = 25), All-on-4 rehabilitation in the maxilla using at least two Zygoma implants (group 2, N = 25), and All-on-4 rehabilitation in the mandible (group 3, N = 20). Principal outcome parameters were postoperative pain (100 mm VAS) and perceived swelling (100 mm VAS).

Biofilm inhibition by an experimental dental resin composite containing octenidine dihydrochloride.

Objectives: The aim of the present study was to investigate an antimicrobial additive containing experimental resin composite with regards to its impact on biofilm formation under oral conditions.

Methods: Biofilms were established in situ on composite specimens (n=192) which contained octenidine dihydrochloride (ODH, 3 wt.% or 6 wt.

Pulse-duration dependency of femtosecond laser refractive index modification in poly(methyl methacrylate).

Refractive index modification of pure poly(methyl methacrylate) (PMMA) is investigated as a function of pulse duration using femtosecond lasers at 800 and 387 nm wavelength. It is observed that at 800 nm, the refractive index is modified more efficiently as the pulse duration decreases below 100 fs, whereas at 387 nm, efficient index modification is accomplished with longer, 180 fs pulses. Results suggest that three- and two-photon absorption is responsible for modification of pure PMMA at 800 nm and 387 nm, respectively.

Photochemistry of refractive index structures in poly(methyl methacrylate) by femtosecond laser irradiation.

Femtosecond, subablation threshold photomodification of poly(methyl methacrylate) (PMMA) at 387 nm is explored to enable fabrication of optical components. Volatile fragment analysis (thermal desorption gas chromatography-mass spectrometry) and molecular weight distribution monitoring (size exclusion chromatography) suggest photochemical modification, involving direct cleavage of the polymer backbone and propagation via chain unzipping under formation of monomers, similar to the pyrolytic degradation of PMMA. Waveguides were produced in undoped, clinical-grade PMMA, showing an increased refractive index in the laser focal region (Dnmax=4x10(-3)).