About Us

Dedicated to providing exceptional dental care, Dr. John D. Beckwith and his team at Cornerstone Dental specialize in a wide array of dental solutions, helping patients achieve optimal oral health and a beautiful smile appearance with lasting results. Our dentists utilize modern techniques and advanced technologies to ensure safe, effective, and comfortable dental treatments.

Our commitment to serving patients begins with providing information to help patients make informed decisions about their oral health needs. We believe that every patient should be knowledgeable and comfortable with their treatment decisions. At Cornerstone Dental we are committed to building a foundation of trust by treating patients as individuals.

Our treatment will always be based on your best interests. Our expert training and technology enables us to assist you in the decisions you make, regarding what is best for you and your family. We will openly discuss what you can expect from our recommended treatment plan, what’s involved, anticipated costs as well as alternative treatment. We encourage you to ask questions, so you can confidently decide how to proceed with your treatment.

To learn about each of our dentists’ background, including their past trainings, professional involvements, and experience with their areas of interest, visit their biographies below.

John D. Beckwith, D.M.D.

Dr. John D. Beckwith is a premier implant dentist who has achieved the highest level of expertise possible for implantology. With his advanced knowledge and refined surgical skill, Dr. Beckwith has placed over 5,000 dental implants throughout the course of his career, making him one of the top implant providers in the United States. His comprehensive understanding of all areas of dentistry equips him with the ability to perform every stage of the implant process with the utmost proficiency. Dr. Beckwith has been recognized for his excellence in the field of dentistry by being awarded the distinguished titles of “American Top Dentist” and “NJ Top Dentist” for multiple years.

Since completing his dental degree from the University of Pennsylvania, School of Dental Medicine, Dr. Beckwith has regularly undergone continuing education courses to further hone his skills, including his participation in the surgical program at the Misch International Implant Institute. Dr. Beckwith has also earned accreditation from some of the world’s most prestigious dental and implant organizations. He is a Diplomate of the American Board of Oral Implantology, a status that can only be achieved after a dentist has spent six years performing implant dentistry, presented patient cases for board review, and passed a series of rigorous examinations. Dr. Beckwith is also a Fellow of the International Congress of Oral Implantology, the Academy of General Dentistry, and the American Academy of Implant Dentistry.

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Arlene O’Brien, D.M.D

Dr. Arlene O’Brien is a general dentist with over 10 years of experience in private practice. She offers patients in the Green Brook area a variety of treatments to help them improve the health and appearance of their teeth. Whether she is performing routine family care or planning cosmetic restorations, Dr. O’Brien takes a personal approach to dentistry, listening closely to each patient’s concerns and finding the most beneficial solution for helping them achieve their dream smile.

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Christine O’Rourke, D.M.D.

Dr. Christine O’Rourke is a general dentist providing gentle, compassionate care to her patients. She strives to deliver the best dental care possible while alleviating any concerns patients may have about their dental treatments. As she gets to know her patients, Dr. O’Rourke is committed to easing their pain and helping them maintain and improve their oral health. She enjoys being part of a team where each and every member is dedicated to providing efficient, top-quality patient care.

Dr. O’Rourke received her Bachelor of Science in Chemical Biology at Stevens Institute of Technology. She then graduated from Rutgers School of Dental Medicine in 2017 with her DMD, after which she completed a General Practice Residency at the VA Hospital in Lyons, New Jersey. She is licensed to practice dentistry in both New Jersey and Pennsylvania.

In addition to her work at Cornerstone Dental, Dr. O’Rourke is a member of the Gamma Pi Delta Prosthodontic Honor Society, the American Dental Association, the New Jersey Dental Association, and the Academy of General Dentistry. In her free time, she likes to travel; root for the Yankees, Devils, and Giants; spend time with her family, friends, and boyfriend; and play with her favorite dog, Puck.

Meet Our Staff

Dawn Kavanaugh, RDH

Dawn has been with the practice since its inception in 1989. She is a highly qualified dental hygienist with over 20 years of experience. She received her associate degree in Allied Health from Middlesex County College.

Katarzyna Spiwak

Katarzyna joins Cornerstone Dental as a seasoned dental assistant, with over 7 years of experience. She excels in orthodontics and enjoys working with our pediatric patients. Katarzyna has also received her dental radiology license.

Linda Klein, RDH

Linda is a well-versed dental hygienist, who brings over 20 years’ experience to Cornerstone Dental. She received an associate degree in Applied Science, from Middlesex County College. Linda is also the Financial and Insurance Coordinator for the practice.

Taylor Delmonico, RDH

Taylor attended Harcum College for Dental Assisting in 2012 to become a Certified Dental Assistant in New Jersey. She furthered her education by completing a Bachelor of Science in Dental Hygiene at Pennsylvania College of Technology in May 2016. Taylor has experience working with the special needs population, and she enjoys educating patients on the best way to optimize their oral health. She is passionate about bridging the gap between oral and general healthcare to better identify, treat, and prevent systemic disease. In her free time, Taylor likes to travel, be outdoors, and spend quality time with her pug, Lola.

Very professional staff and state-of-the-art technology. Super clean and beautiful office! The family is very happy and comfortable with this practice!

Kathleen Schwint

October 07, 2017