Timothy A. Collier, DDS

Dr. Timothy Collier received his DDS degree from the University of Iowa in 1997. He stays current in the field with continuing education and is skilled in the latest dental treatments, including Invisalign, Lumineers, laser dentistry, cosmetic dentistry and dental implants. With his extensive training, he is able to provide his patients, of all ages, with a variety of dental treatments to best meet their needs. Dr. Collier is a member of the American Dental Association, the Academy of General Dentistry, and the
American Orthodontic Society. As a dentist, Dr. Collier’s goal is to provide high-quality service using the best dental technology in a comfortable setting and exceeding patient’s expectations.

Dr. Collier and his wife, Tricia, have three daughters: Lauren, Allison, and Morgan. When he is not helping patients at the office, Dr. Collier stays active in the community serving on multiple boards, church groups, and volunteering with various non-profit organizations. Dr. Collier also enjoys spending time with his family and being outdoors. He also likes golfing, fishing, hunting, running, and skiing.


 Gordon F. Goettsch, DDS

Dr. Goettsch chose to move to the Manchester Community after his graduation from the University of Iowa, College of Dentistry in 1976. For more than 40 years, he has taken great pride in building personal relationships with his patients while offering caring, comprehensive dental care with the highest quality products and cutting-edge technology. He has had training in implant and grafting procedures through the Bicon Institute in Boston and the Zimmer Institute in New Jersey, and has taken a wide variety of courses pertinent to today’s changing dental environment.

Dr. Goettsch has enjoyed sharing his knowledge and love of dentistry with dental students at the U of I College of Dentistry as an Adjunct Faculty Professor, as well as a faculty dentist at Hawkeye Dental Hygiene College in Waterloo. He was recently inducted into the prestigious International College of Dentists for his service to his local community, his profession, and furthering dental health. Dr. Gordy has served the community in many organizations, including leadership roles, and has been a Director at F&M Bank for over 35 years.

As he limits his patient care days at Dental Associates, he enjoys sharing his knowledge and mentoring his colleagues and dental team members, as well as enjoying time with his wife, Deb, their kids, and grandchildren, and golfing.


Zachary Stecklein, DDS

Dr. Zachary Stecklein received his DDS degree from the University of Iowa in 2014. He received training in a variety of areas in dentistry, including prosthodontics, oral surgery, periodontics, endodontics, restorative, and pediatric dentistry. Staying current, and at the cutting edge of dentistry with continuing education in order to provide his patients with the best comprehensive care, is very important to him. Dr. Stecklein has received training to place and restore dental implants at the prestigious Zimmer
Biomet Institute under Faculty from the New York University Department of Periodontology and Implantology. He is a certified InvisalignR general provider treating both teenagers and adults. Dr. Stecklein is a dental provider for the Hawkeye Community College of Dental Hygiene and Dental Assisting programs. He is an associate staff member in Dentistry at Regional Medical Center in Manchester. Organized dentistry is important to Dr. Stecklein as he is a member of the American Dental Association and the Academy of General Dentistry. Dr. Stecklein’s goal is to provide each of his patients with the highest comprehensive standard of care while forming trusting relationships in the community.

Dr. Stecklein was raised on a farm nine miles east of Oelwein, Iowa. He attended Oelwein High School and later received a bachelor’s degree with honors and distinction in biology from the University of Iowa. When Dr. Stecklein is not improving the smiles and oral health of his patients, he enjoys boating, fishing, golfing, cheering on the Hawkeyes, and spending time with family and friends.


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Ryan Oetken, DDS

Dr. Ryan Oetken pursued his dental career at The University of Iowa College of Dentistry where he received his Doctor of Dental Surgery Degree in 2013. Upon completion of dental school, Dr. Oetken continued his education through a general practice residency at Truman Medical Center Lakewood in Kansas City, MO. The residency is well-known for its comprehensive nature
including but not limited to Dental Implants, Pediatrics, Endodontics, Sedation Dentistry, Medically Complex, Long-Term Care Residents, and Oral Surgery. Dr. Oetken practiced for the past two years in Epworth, IA comprehensively treating patients of all ages. Dr. Oetken is currently a member of the American Dental Association, University of Iowa College of Dentistry Alumni board member, and actively pursuing his fellowship with the Academy of General Dentistry.

Ryan was born and raised on a family farm in Akron, IA. Ryan attended Morningside College in Sioux City, IA where he enjoyed playing football while completing his degrees in biology and chemistry. Dr. Oetken enjoys being outdoors, playing sports, running, hiking, and hunting. Ryan also loves spending time with family, friends, and his wife Alexia.