Dr. Penner was referred to me by my boss; her daughter saw Dr. Penner over 20 years ago and did a wonderful job on her. Dr. Penner successfully straightened both my boy's teeth. Before, my boys were shy and did not like to smile or show their teeth due to the fact that their jaw and teeth were not well alligned. Dr. Penner fixed this with no problems. As long as the patents follow the doctors instructions then there should be no issues. I am pleased with Dr. Penner and feel that any "Responsible" parents can trust him as well. Thanks~