A cybernetic replacement was any biomechanical device used to replace body parts ranging from internal organs to limbs, which were usually lost or destroyed by disease or dismemberment. Prosthetic replacements were connected to organic tissue via a complex synth-net neural interface, which provided the recipient with control and sensation. External replacements were often covered by synthflesh to emulate actual organic tissue. An individual with cybernetic replacements was known as a cyborg.
The galaxy had centuries of advanced technology at its disposal. Among them were the ability to replace and, for a price, modify and enhance the body. Cloning was expensive and, given the horrors of the Clone Wars, illegal on most planets after the era. Some limited regeneration of limbs was considered acceptable but there were medical dangers involved with a science that had, for obvious reasons, not seen much development in later decades after the Clone Wars. For the majority of galactic citizens, cybernetic replacements were the cheap, effective, legal, and safe solution to unfortunate and severe physical injuries.
For those willing to make the sacrifice of flesh and expense, the body could be "upgraded" to allow for additional skills and abilities. Some were very innocuous, the issued to military service members for instance. Others involved modifying the limbs and internal systems of the potential patient. As with everything in the galaxy, this came at a potential price, in credits and in the potential loss of self. Someone could easily go too far in attempting to be "more human than human."
When flesh failed—and sometimes even before that—cybernetics took over. Prosthetic limbs and replacement organs powered by batteries and controlled by electrical impulses were the low end of these procedures with sophisticated cybernetic hardware designed to improve or augment the recipient's body and mind at the high end of the scale.
Artificial organs could be implanted by droids such as the DD-13 medical assistant droid.
Two major kinds of cybernetic attachments existed in the galaxy: replacements and enhancements.
Many beings had prosthetic replacements throughout galactic history. Several beings were well known for employing unique or extensive prostheses.
- Darth Malak, a Dark Lord of the Sith during the Old Republic, had a prosthetic voice box that he used to speak, as well as a metallic jaw.
- Darth Plagueis was forced to wear a transpirator mask after an attempt on his life by Maladianassassins left him with a severed trachea and a large part of his jawbone missing in 52 BBY. His master, Darth Tenebrous, had a similar mask.
- Shahan Alama had a combat droid's arm grafted into his elbow.
- Rianna Saren, a Twi'lek mercenary who had one of her lekku cut off, had a prosthetic replacement fitted.
- GeneralGrievous was forced to have almost his entire body replaced by cybernetic parts after a near-fatal shuttle crash. Though he retained his vital organs, such as his brain, eyes, heart and stomach, nearly everything else was cybernetic.
- Anakin Skywalker had a prosthetic arm, which he was given after a duel with CountDooku resulted in the loss of his arm. Some time later, the arm was replaced.
- Bounty hunterCad Bane had a pair of cybernetic tubes connected to his skull to help him in breathing.
- Neks were enhanced with cybernetic implants for use as animal weapons during the wars that erupted on Cyborrea.
- Sith LordDarth Maul had to wear a cybernetic apparatus instead of his legs which were cut off by Obi-Wan Kenobi at the end of their duel on Naboo. Maul would later live on Lotho Minor in near-madness until he was found by his brother, Savage Opress, and taken back to Dathomir where Mother Talzin created him a new pair of cybernetic legs. He would later gain a pair of human mechanical legs that returned him to his previous size thanks to Death Watch led by former GovernorPre Vizsla. Savage Opress also received a cybernetic left arm from Death Watch.
- Clone CommanderWolffe lost his right eye at the hands of Asajj Ventress during the Battle of Khorm. He later received a silver prosthetic eye to replace the eye he lost.
- Certain Nexu were enhanced with various cybernetics by SeparatistArkanian scientist Cratala to guard the wreckage of the Sa Nalaor, which had crashed on Cholganna following the conclusion of the Clone Wars.
- A great deal of Darth Vader's ravaged body was supported by prosthetic replacements, although they had a comparatively low quality compared to others. Vader's artificial limbs were incredibly heavy and purposely badly made, frequently snagging on the inside of his suit. However, despite the low quality, his artificial limbs never tired or weakened.
- InquisitorValin Draco was fitted with extensive cybernetics, following his near-death when he was attacked by the Alderaanian Resistance beneath the Almas Academy.
- A'Sharad Hett lost his right arm in his duel with Obi-Wan Kenobi on Tatooine and received a prosthetic replacement. When he met the Yuuzhan Vong, they restored his organic arm.
- Grand MoffTrachta was kept alive by a cybernetic respiratory system, and his eyes were replaced with ocular cameras, including a third "eye" in the back of his head.
- Slak Sagar used a respiration system similar to Trachta's.
- Rosh Penin's arm was replaced by a prosthetic one after Alora severed it.
- Luke Skywalker was also fitted with a prosthetic hand after losing his own during a duel withhis father on the planet Bespin. This hand was replaced during his brief service to the resurrected Emperor. The replacement was later severed during a duel with Lumiya, so he was given yet another replacement prosthesis.
- Boba Fett's left lower leg was eaten by the Sarlacc. He used a prosthetic replacement in later years after escaping from its belly.
- Qorl, a TIE Fighterpilot stationed on the first Death Star, who was shot down during the Battle of Yavin and shot down again by Luke Skywalker after repairing his fighter. He had a broken left arm after his first crash. He was able to return to a Imperial loyal stronghold called the Second Imperium after Lowbacca, Tenel Ka, Jacen Solo, and Jaina Solo repaired his fighter. The Second Imperium provided him a droid arm to replace his broken left arm.
- The Sith LadyLumiya also received extensive amounts of prosthesis after crashing her starfighter following a dogfight with Luke Skywalker. It was her claim that high levels of prosthesis dampened an individual's sensitivity to the Force, though others, like Darth Plagueis, thought otherwise. This, she claimed, had stopped Darth Vader from attaining the full potential of a Sith Lord and was also stifled her attempts to achieve a mastery of the dark side of the Force.
- Lauli Wahlo, who owned a noodle shop, had a prosthetic eye.
- Sith SaberGavar Khai had his arm cut off at the forearm, in battle with Luke Skywalker, and replaced it with a cybernetic that was stronger and faster.
- Imperial Knightmaster armorerHogrum Chalk was maimed in an accident, forcing him to wear a suit of life-preserving cyborg armor, as well as cybernetics replacing the left side of his face and eye.
- Imperial Knight Azlyn Rae was fitted with first a full suit of life-preserving armor made by Rawk, and later an artificial breather constructed by Hogrum Chalk, after her lungs were burned during an assassination attempt on Darth Krayt.
This area of medical technology was spurred by the carnage of the Clone Wars, and the replacement of body parts with lifelike replicas reached a high level of refinement during the Galactic Civil War. Not all prostheses, however, were designed with replicating the real body part in mind. The prosthetic arm of Arden Lyn, a Teräs Käsi master, was conspicuously disproportionate to her body and was in fact a modified droid arm. Similarly, Darth Maul, the former Sith apprentice to Darth Sidious, after narrowly surviving his fight with Obi-Wan Kenobi with his lower half lost, had created a crude substitute for his lower half via a prosthetic that more resembled an arachnid than an actual Dathomirian Nightbrother lower half, although it was later replaced with a pelvis and legs more closely resembling his original ones when he was recovered by his half-brother, Savage Opress.
Although prostheses were widely available, not all candidates accepted the replacement limbs offered to them. The Jedi Tenel Ka lost an arm during a practice lightsaber duel with Jacen Solo but chose to shun the offer of a replacement, instead choosing to focus upon her own physical and Force-based abilities to compensate for the loss. Wolf Sazen also kept his arm from being replaced after Darth Nihl cut it off until later in 137 ABY.
Also, the arrival of the Yuuzhan Vong, who wielded advanced biotechnology, opened new avenues for the replacement of lost limbs. After being captured by the Yuuzhan Vong, A'Sharad Hett's synthetic arm was replaced with a grown organic replacement. Decades later, Hett, now Darth Krayt, would order that a similarly organic replacement be given to Darth Nihl after the Nagai lost his right arm to Cade Skywalker.
- "Perfect Evil"
- Battle of the Sith Lords