About Us

At Cascade Oral and Facial Surgery, we strive to provide the highest level of care in a friendly, compassionate setting.


When you schedule an appointment with our oral surgeons in Lake Grove and Lake Oswego, Dr. Philip Mann and Dr. Peter Dennis, for wisdom teeth removal, jaw surgery, dental implant placement, bone grafting, or other surgical procedures, you can feel confident knowing that the treatment and care you receive ranks as some of the latest and most advanced possible.

As graduates of the Oral and Maxillofacial Surgery advanced residency program at OHSU, Drs. Dennis and Mann believe in the value of continuing education and staying at the forefront of the latest advances in oral surgery, dental implants and facial reconstruction. Our oral surgery practice is only as good as the results it provides our patients. That’s why you can always feel confident knowing that the comfort and care you receive at our Lake Oswego oral surgery practice will always meet your needs and exceed your expectations.

If you’re searching for an “oral surgeon near me”, then let the experienced team at Cascade Oral and Facial Surgery help set you on the road to recovery. Contact our office today to schedule your oral and facial surgery consultation with Dr. Mann or Dr. Dennis and start to see the possibilities of a healthier, better looking you.

Meet the Doctors


Philip Mann, DDS, MD is a Board Certified Oral and Maxillofacial Surgeon, having completed a six-year residency program at Oregon Health and Science University, where he also received the MD degree. Prior to that he attended Yale University for his undergraduate degree, and dental school at Columbia University College of Dental Medicine in New York City. Dr. Mann has been in practice in the Portland area since 2015, both in private practice and as an Assistant Professor at OHSU.

He has also volunteered with Free to Smile, a non-profit organization providing cleft lip and palate surgery, for a mission to Guatemala in 2014. A native of New Jersey, Dr. Mann enjoys his newfound home in Oregon, along with his two children Evelyn and David.

A former Varsity athlete in Heavyweight Rowing, Dr. Mann now enjoys road and mountain biking, running, hiking, and camping throughout the Pacific Northwest.

Peter Dennis, DMD, MD is a native of the northwest, born and raised in Longview, WA in a rural setting along the beautiful Columbia River.  Following high school, he attended the University of Washington for undergraduate studies where his interest in dentistry began. Looking for a change of scenery, he moved to Boston where he attended the Harvard School of Dental Medicine, graduating Cum Laude.  Dr. Dennis returned to the northwest and chose to attend Oregon Health and Science University for residency in oral and maxillofacial surgery.

Following residency, he pursued an additional fellowship in Orthognathic Jaw Surgery with Carolinas Center for Oral & Facial Surgery. In the span of a year, he performed nearly 500 major surgery cases under the tutelage of some of the top surgeons in the field. He then joined Dr. Mann at COFS in 2020 to return to the scenic Pacific Northwest for his practice.

In his free time, he enjoys exploring new restaurants and breweries, skiing, watching sports, as well as spending time outdoors with his wife, Dr. Lauren Manning, their sons Jackson and Lincoln, and their golden doodle, Bailey.


Our Team

Ashley – Practice Manager

Lindsey – Surgical Assistant

Rhawni – Surgical Assistant

Kelly – Surgical Assistant

Terrell – Surgical Assistant

Julia – Surgical Assistant


 RJ – Admin Assistant

& Marketing

Jessica – Admin Assistant

& Insurance Coordinator

 Rachel – Admin Assistant

Jonathan – Admin Assistant

© 2022 Cascade Oral and Facial Surgery

16455 Boones Ferry Rd Ste B
Lake Oswego OR 97035
Phone: 503-482-7200
Email: office@CascadeOFS.com

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© 2022 Cascade Oral and Facial Surgery