Loud Pop in Breast Implant

It is not possible to know exactly what happened without more information and a physical examination, however, you narration suggested that you boy friend performed a closed capsulotomy on your breast. Closed capsulotomy is an old technique to soften a breast with capsular contracture. Closed capsulotomy has been largely abandoned in the US, because it can lead to uncontrolled bleeding, rupture of the implant and malposition.

Followup with an MRI is important to check your implant. Mammograms and ultrasound are not as reliable as the MRI. An MRI is about 90% accurate (so wrong 10% of the time), but it is the best nonsurgical way to check an implant currently available. The only 100% accurate method is to look at the implant directly in surgery.

An open capsulotomy or capsulectomy is the preferred method of treatment for symptomatic capsular contracture. Both require surgery, and allow for precise modification of the capsule's scar and direct inspection of the breast implant.

Silicone implants are designed to be able to withstand significant amounts of pressure, and the loud pop sound you heard may be due to a rupture of the capsule around the implant. An MRI is better suited than an ultrasound in assessing whether the implant has ruptured. Make sure you follow up with your plastic surgeon afterwards to discuss the best course of treatment, if any.