Belfast High Court has found there was insufficient evidence to suspend seven nurses from Muckamore Abbey Hospital from the national nursing register.
They were suspended by the Nursing and Midwifery Council following a police investigation into allegations of abuse against patients.
The nurses remain temporarily suspended by the Belfast Trust.
In a statement, the Belfast Health and Social Care Trust said its processes were unaffected by the ruling.
The judge's ruling in the High Court sitting in Belfast on Friday, means that the nurses can practice in the UK, but not within the Belfast Trust pending the outcome of the investigation.
"We have contacted families directly over the weekend to discuss concerns," the trust said.
"We appreciate that this is a difficult time."
The Nursing and Midwifery Council said they are aware of the court's decision.
"We are continuing to investigate the very serious allegations about nursing care at Muckamore Abbey Hospital," a statement said.
"In light of the court's decision, we urge the Belfast Health and Social Care Trust to provide us with the evidence we have previously requested which we require so were can take appropriate regulatory action."
By December 2018, 19 health workers including a number of nurses had been suspended from working at Muckamore Abbey Hospital.
Insufficient evidence meant that the suspensions from the national register were overturned.
One of those involved told the BBC that it had been a deeply distressing time and that the court decision did not mean the matter was totally over for those involved.
In a statement, Rita Devlin from the nurses' union, the Royal College of Nursing, said: "The RCN in Northern Ireland believes that the powers exercised by the Nursing and Midwifery Council must be robust in their essential public protection function but must also follow due process and be fair to those who are the subject of investigation.
"The RCN in Northern Ireland has written to the Permanent Secretary of the Department of Health calling for the establishment of an independent inquiry into the care and treatment of patients residing at Muckamore Abbey Hospital."
Muckamore Abbey: Insufficient evidence to suspend nurses - BBC
Families have since come forward to make shocking allegations about the conditions endured by loved ones living there, including a seclusion room which was described by one parent as "a dark dungeon". We have contacted families directly over the weekend to discuss concerns. A leading nurse last night questioned the trust's handling of the crisis over such a lengthy period. Disturbing details of patients "lying on the floor and being kicked" and of others being kneed in the groin and "dragged by the hair" are outlined in the expert 'Serious Adverse Incident' review alongside failings of hospital managers who dismissed families' suspicions. But I don't accept there was 'a culture of silence'.". Treatment for...
Such is the scale of the crisis that agency nurses are being flown blood Thinning Drug May Be Safer Option Against Recurrent Stroke in from England to provide emergency cover at the facility near Antrim town, with the health service paying for them to stay at the nearby Dunadry four-star hotel. "We are continuing to investigate the very serious allegations about nursing care at Muckamore Abbey Hospital a statement said. Image caption Belfast High Court 8,000 Flu Deaths Prevented Last Year With Vaccine: Study found there was insufficient evidence to justify the temporary suspensions. "The staff remain on precautionary suspension from Belfast Trust whilst investigations are ongoing the spokeswoman said. It is understood altria039s Snuff Safer Than Cigarettes, FDA Panel Agrees the allegations are linked to the psychiatric intensive care unit (picu) at Muckamore, which is staffed by almost 25 specialist nursing staff. "There have been no prosecutions to date, however the investigation remains ongoing she said.