Murray Dental Group is celebrating two milestones this year: 50 years since Dr. Robert Murray first opened the practice in Minnesota and 40 years since he relocated it to Glenwood Springs. The practice will mark the anniversary with a celebration at 4 p.m. Friday at its Glenwood Springs office, 1512 Grand Ave. Robert Murray first opened the Glenwood Springs practice in 1986. It is now run by his son Dr. John Murray. The practice opened a new br…