When to Consider Prepectoral Implant Conversion After Subpectoral Implant Breast Reconstruction and How to Plan It.

Many deformities occur after subpectoral implant-based breast reconstruction. Today, immediate prepectoral reconstruction with implants shows a significant increase in popularity because it has many advantages over subpectoral positioning: absence of muscle deficit and breast animation deformity, reduced implant dislocation, and less postoperative pain and easy recovery. Implant pocket conversion from the submuscular to prepectoral plane has become our preferred strategy for solving most problems related to the submuscular implant position. The authors performed a retrospective review (from June 2018 to December 2022) of patients who underwent prepectoral implant conversion for correction of animation deformity, dysfunctional chronic pain, or to ameliorate poor cosmetic results. Acellular dermal matrix (ADM) was utilized in the first 7 cases; in the remaining 56 patients polyurethane-covered implants were placed. Resolution of animation deformity and chronic pain were evaluated, as were cosmetic results and any postoperative complications. Sixty-three patients (87 breasts) underwent prepectoral implant conversion with complete resolution of animation deformity and chronic pain as well as improved cosmetic results. Preventive lipofilling was done in 18 patients. Complication rate included 3 periprosthetic seromas in ADM group. All resolved after ultrasound-guided aspiration. Rippling was noted in 3 patients, and edge visibility was documented in 1 patient. There were no incidences of grade 3 or 4 capsular contracture. The prepectoral implant conversion improves functional and aesthetic results, reaching excellent outcomes. Preparation for this surgery with fat grafting is considered a complementary procedure that increases the indications for prepectoral implant conversion.