If you research it you will see that size loss came from most everyone before the implant for any number of reasons. A good dr will keep the length you have from a good injection of trimix which may or may not be equivalent to a stretch test but will probably be close. I was close to 7 inches over 2.5 years ago before ed and peyronies. Got down to 5.5 with little use and the plaque. With traction and ved I got a little straighter with about a 30 to 35 degree curve and am now just under 6 with s trimix injection. Not sure what study told you an inflatable implant loses you length. Reputable studies show that the titan, the lgx, and the cx all will get some length back within the first year or two of inflating. A malleable implant will not do that. It does not add length or girth. When I researched implants I found they were used as a placeholder if an infection developed and an inflatable had to be removed or if an inflatable could not be implanted for a medical reason. Severe arthritis was one reason if you could not press the bulb to move saline to the tubes.
Otherwise the 3 piece implant is singularly preferred by most high volume drs. If you look it up I think the lgx added about 1.3 cm, cx about 1.1 and titan just under 1 cm to your length over time. Girth is added depending on the cavern size and your bodies elasticity. A malleable implant is always up, never grows any larger period so you have no ability for it to increase your length or girth. You also have to monitor closely its penetration into the glans. There are medical reasons for it to be used. I just hope when I have my implant it is not my best choice by the dr.
As a positive to the 3 piece implant. If, when it goes and it will probably go at some point. Studies again show a 10 year life is not unexpected. You normally move up to s longer tube.
Whatever you decide, best of luck to you. Visit several drs if you have to in order to feel comfortable and get all the information you need. It took me 4 drs to find one I liked and answered all my questions. They all provided me a lot of information on the titan, lgx, cx. And one piece implants. For me they all at least agreed due the peyronies I would need the titan. Limits my options and choice. All I have to decide on is who is putting it in.
Central KY. Fell around 2.5 yrs ago on the boys. ED, venous leak, and Peyronies developed since. Implanted March 7, 2018, Dr. Kevin Campbell, Cincinnati, OH. Titan was used due to 30 to 35 degree curve. 18 plus 1. Excellent experience so far. Happy so far