DoVe Trial: Dorsal Onlay Versus Ventral Onlay in Isolated Bulbar Urethral Strictures

Inclusion Criteria: * Voluntarily signed written informed consent according to the rules of Good Clinical Practice (Declaration of Helsinki) and national regulations (Appendix B). * Age ≥ 18 years. * Male patient. * Fit for operation, based on the surgeon's expert opinion. * Isolated bulbar urethral stricture confirmed by imaging. * Preputium, penile shaft skin, buccal mucosa and lingual mucosa are allowed as free graft material in the executed dorsal onlay or ventral onlay FGU. * Patient is able and willing to attend the follow-up consultations. Exclusion Criteria: * Absence of signed written informed consent (Appendix B). * Age \< 18 years. * Female patients. * Transgender patients. * Patients unfit for operation. * Concomitant urethral strictures at other urethral locations (penile urethra, membranous urethra, prostatic urethra, bladder neck). * A unique urethral stricture at other urethral locations (penile urethra, membranous urethra, prostatic urethra, bladder neck). * Prior bulbar urethroplasty. * Lichen Sclerosus related strictures. * Strictures after failed hypospadias repair. * Patients with neurogenic bladder. * History of pelvic radiation therapy. * Shift of technique to any other technique than dorsal or ventral onlay FGU due to any circumstance (post-hoc exclusion). * Utilization of free graft material other than preputium, penile shaft skin, buccal mucosa or lingual mucosa. * Any condition or situation, which, in the investigator's opinion, puts the patient …