David Rosenthal is a senior lawyer whose law practice is devoted to business, corporate, commercial and healthcare law for dentists. He advises dentists throughout Ontario on a broad range of legal matters, with particular emphasis and legal advice on: 

- purchase and sale of dental practices;

- dental practice and corporate reorganizations;

- dentistry professional corporations, technical and hygiene service corporations and other types of corporations;

- various agreements relating to dental practices including associate agreements, partnership and cost share arrangements, technical and hygiene service agreements and shareholder agreements.

Educator - Guest lecturer at the Faculty of Dentistry, University of Toronto and the Schulich School of Medicine & Dentistry, Western University.

Speaker - Ongoing speaking engagements to educate dentists and their professional advisors. Selected previous presentations include seminars for the Ontario Dental Association, the Royal College of Dental Surgeons of Ontario, CDSPI, Toronto Academy of Dentistry, University of Toronto Centre for Continuing Education, Alpha Omega Toronto, Brant County Dental Society, Thunder Bay Dental Association, Waterloo Wellington Dental Society, Shaw Group of Dental Laboratories, Royal Bank of Canada health care professional banking, Bank of Nova Scotia health care professional banking, ROI Corporation, Tier Three Brokerage, Cirrus Consulting Group, Raymond James and Henry Schein.

Columnist - Regular columnist for 'The Professional Advisory For Dental Professionals' writing articles about legal matters relating to Ontario dentists. The Journal is published five times annually.

Author - The contributing author regarding legal matters for the book 'Dentist’s Tax & Financial Guide - For All Stages Of Your Practice' published by the Ontario Dental Association.