Riverside Partners-backed Allied Dental, a dental services organization providing non-clinical administrative services to dental practices in the Northeast and Mid-Atlantic, completed the merger with TriSpan-backed PG Dental, a dental service organization that provides non-clinical business services to independently owned and operated dental practices currently operating in New Jersey, Pennsylvania and Maryland. Financial terms were not disclosed. "This is an exciting development for the Allied Dental and PG Dental teams. This transaction brings together two organizations that will become the largest network of affiliated practices in New Jersey, with a strong presence in Pennsylvania and Maryland as well. During our ownership, Riverside invested significantly to strengthen the Allied Dental leadership and back office infrastructure, which PG Dental valued and will seek to leverage as they bring the two organizations together," Max Osofsky, Riverside General Partner.