Edinburgh back Chris Paterson travelled to Poland on Wednesday to join the Scotland training camp in Spala.
Paterson underwent a pelvic scan on Tuesday but the results show he does not need surgery.
The full-back had to leave Scotland's recent Southern Hemisphere tour early after sustaining a triple fracture of the face in the defeat to Western Samoa.
Scottish Rugby's rehabilitation physiotherapist Stephen Mutch said: "The consultants who reviewed Chris were satisfied with the pelvic scan and we are now initiating a gradual programme of rehabilitation.
"Chris will be under the care of the Scotland medical team in Spala where the Scotland management are keen to have him involved on the planning front and to get his valuable input as a senior player."
Wales' acting head coach Rob Howley has given Sam Davies and Rory Thornton a boost ahead of the RBS 6 Nations by naming the uncapped Ospreys duo in his largely experienced squad for the Autumn Internationals.