Yes, Dr. Karsten Ritter-Lang generally has a longer track record and a higher documented total procedural volume in artificial disc replacement (ADR) than Dr. Thomas Bierstedt, though both are among the most experienced motion-preservation spine surgeons in Germany.
Here is how their experience and surgical focus compare:
Dr. Karsten Ritter-Lang (STENUM Hospital)
Total Procedural Experience: Widely cited as having performed more than 10,000 spinal column reconstruction surgeries, including over 6,000 to 8,000+ disc replacement procedures (both lumbar and cervical).
Timeline & Lineage: He entered the motion-preservation field very early in the timeline of modern disc arthroplasty. He trained directly under the developers of the Charité artificial disc at the Charité University Hospital in Berlin during the 1990s and has been focusing on anterior retroperitoneal approach surgeries and disc arthroplasty for well over 25 years.
Surgical Scope: Known especially for high-volume, multi-level lumbar disc replacements via anterior access, as well as multi-level cervical and hybrid configurations. He has frequently utilized implants such as the Baguera, ProDisc, and older-generation core devices.
Dr. Thomas Bierstedt
Total Procedural Experience: A board-certified neurosurgeon who, along with his partner Dr. Bernd Illerhaus has performed thousands of ADR procedures over the past 15–20 years.
Timeline & Focus: Dr. Bierstedt began focusing heavily on motion preservation and dynamic spinal stabilization in the 2000s and built an international reputation particularly around viscoelastic motion devices (notably the M6-C and M6-L), as well as multi-level cervical disc replacements and hybrid anterior/posterior constructions.
Specialty Orientation: Because his foundational training is in neurosurgery, Bierstedt often brings a distinct micro-decompression approach to disc space preparation and nerve protection, frequently teaming up with vascular/access surgeons for complex lumbar exposures.
Summary
Surgeries Performed & Seniority: Ritter-Lang has the edge in pure volume and career tenure in disc replacement, having started earlier in the evolution of modern lumbar/cervical arthroplasty and accumulating one of the highest individual ADR case counts in Europe.
Philosophical Differences: Ritter-Lang’s practice is deeply rooted in orthopedic reconstructive spine surgery and anterior exposure mechanics, whereas Bierstedt operates from a neurosurgical background, often utilizing different generations/brands of elastomeric vs. articulating implants.
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.