Pre-operative factors affecting the indications for anatomical and reverse total shoulder arthroplasty in primary osteoarthritis and outcome comparison in patients aged seventy years and older

Giovanni Merolla, Mauro De Cupis, Gilles Walch, Vincenzo De Cupis, Elisabetta Fabbri, Francesco Franceschi, Claudio Ascani, Paolo Paladini, Giuseppe Porcellini