Introduction The implantation of penile nodules under the foreskin is unusual in Western society. This practice is known in Slavic and Asian cultures and occasionally appears in the western world. We review the historical and medical evidence found in world literature to this date. Aim We discuss case reports and other literature on penile nodules and evaluate their medical significance. Main Outcome Measures Literature search for MEDLINE publications and additional references from non-Medline indexed publications concerning the implantation of foreign bodies under the foreskin. Methods Literature search for MEDLINE-indexed papers followed by a manual bibliographic review of cross-references. We extended the search to non-MEDLINE references using an Internet-based search engine. More information was retrieved by contacting different experts. A statistical analysis was applied to the data collected. Results There seems to be a predominance of penile bead implantation in Asian countries. The average age of a patient was 25.47 years. The average number of beads implanted was 2.71. There is a higher risk of becoming a sexually transmitted disease. Conclusions The prevalence of complications seems to be low. The incidence and severity of early or delayed complications are unknown but are probably underreported. Complications associated with this procedure should be known, especially partner complications. These nodules will possibly be encountered more often in western countries.

The amount of RC following laser irradiation depends on the fluorescence threshold level for a feedback-controlled Er:YAG laser. It might be suggested that this laser system may be used with a threshold level even lower than 5 [U] without removing a clinically relevant amount of root cementum.

Heat generation during the removal of dental restorative materials may lead to a temperature increase and cause painful sensations or damage dental tissues. The aim of this study was to assess heat generation in dental restoration materials following laser ablation using an ultrashort pulse laser (USPL) system. A total of 225 specimens of phosphate cement (PC), ceramic (CE), and composite (C) were used, evaluating a thickness of 1 to 5 mm each. Ablation was performed with an Nd:YVO(4) laser at 1,064 nm, a pulse length of 8 ps, and a repetition rate of 500 kHz with a power of 6 W. Employing a scanner system, rectangular cavities of 1.5-mm edge length were generated. A temperature sensor was placed at the back of the specimens to record the temperature during the ablation process. All measurements were made employing a heat-conductive paste without any additional cooling or spray. Heat generation during laser ablation depended on the thickness of the restoration material (p < 0.05) with the highest values in the composite group (p < 0.05), showing an increase of up to 17 K. A time delay for temperature increase during the ablation process depending on the material thickness was observed in the PC and C group (p < 0.05) with highest values for cement (p < 0.05). Employing the USPL system for removal of restorative materials, heat generation has to be considered. Especially during laser ablation next to pulpal tissues, painful sensations might occur.

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