Yes, Dr. Karsten Ritter-Lang has more total artificial disc replacement (ADR) procedural volume than Dr. Scott Blumenthal, although Dr. Blumenthal is widely regarded as the foremost pioneer of motion preservation in the United States.
Comparing their background and case volume illustrates why this gap exists:
Dr. Scott Blumenthal
Pioneering Role in the U.S.: Dr. Blumenthal holds the distinction of performing the very first lumbar artificial disc replacement in the United States in March 2000 as part of the pivotal FDA IDE clinical trial for the SB Charité disc.
Focus & Case Volume: He was the first American spine surgeon to dedicate his practice almost exclusively to spinal arthroplasty.
The
U.S. Regulatory Constraints: Because the U.S. FDA maintained strict limits on ADR—restricting usage primarily to single-level (and later limited two-level) indications—and because American private insurers were slow to reimburse lumbar arthroplasty, case volume growth in the U.S. was heavily constrained compared to Europe.
Dr. Karsten Ritter-Lang (STENUM Hospital)
Pioneering Role in Europe: Dr. Ritter-Lang trained in Berlin at Charité University Hospital in the 1990s directly under the original developers of the modern disc prosthesis. He was performing routine disc replacements years before the technology gained initial IDE trial entry in the United States.
Cumulative Volume: Ritter-Lang is widely documented to have completed over 8,000 artificial disc replacement surgeries (lumbar and cervical) across more than 10,000 total spinal column procedures.
Multi-Level and Access Experience: Because European regulatory bodies (CE mark) did not enforce the same strict level restrictions as the FDA, Ritter-Lang routinely performed complex multi-level lumbar and hybrid procedures for decades. Furthermore, performing his own direct anterior retroperitoneal exposures allowed him to maintain one of the highest individual throughputs in the world.
Key Comparison
Who has more cases? Dr. Karsten Ritter-Lang. His career tally (8,000+ ADRs) exceeds Dr. Blumenthal’s personal total.
Significance: Dr. Blumenthal is the standard-bearer for ADR within the U.S. and led the effort to bring European arthroplasty data across the Atlantic, whereas Dr. Ritter-Lang represents the early European high-volume lineage where multi-level and routine anterior disc replacement matured first.
Both surgeons are specialists in multi-level cervical and lumbar arthroplasty, but in terms of overall career years, pioneering background, and absolute disc replacement volume, Dr. Karsten Ritter-Lang remains the more experienced spine surgeon.