From the 17th century to today, the shrine has been opened several times to do some surveys (which bones are there) and even some research. Between 1983-1986, the shrine was opened for a protection and preservation project. The opportunity was also taken to do some scientific research on the bones of the apostle. This was done under supervision of prof. dr. Arnaldo Capelli, prof. dr. Sergio Sensi, prof. dr. Luigi Capasso (paleopathology) and prof. dr. Fulvio Della Loggia, all from the Faculty of medicine from the University of Chieti. The anthropological examination on the remains of the skeleton established that the bones belonged to a relatively long male individual with delicate bone structure, with a height of 1 metre 60 cm plus/minus 10 cm. At the age of death the individual was between 50 and 70 years old, with a fracture of the right cheekbone caused by a sharp blow shortly before or after death. The person did also suffer from rheumatism or artritis, which could be seen at the small joints of the hands. Furthermore, a small osteoma (bone tumour) was found in the frontal region of the skull.
Other Thomas artefacts
Modern science
And you could also use 3-D forensic facial reconstruction techniques to shape the face of Thomas in clay...
Sources used:
Website of the Basilica San Thomasso Apostolo.The website of Keith Hunt on Doubting Saint Thomas in India
And many other internet sources, including some utterly confusing Indian ramblings on St. Thomas.