There's a book about the TMJ healing plan. This book is remarkable. If states if you sleep on your back with two pillows under your head, curl up on your side in the fetal position, or sleep on your stomach with your jaw pressed against the bed. Sleeping on your back can increase airways collapsing in relation to mouth guard users. Sleeping on your side is best. The book talks about certain drugs that will cause TMJ. It talks about posture and all the muscles including tongue movement that relate to why one has TMJ. The chapters on stress management is more tailored to those with tinnitus / TMJ-TMD than anything that I read on the net.
I have read hundreds of self help books and this book (author not mentioned due to spam) is so helpful. I will give the author's name in private conversation. This book is detailed with charts, graphs and pictures on why people with TMJ have tinnitus. There's no information of the net that comes close to the tips that this book provides. This book talks about how to reduce jaw, head and neck pain from temporomandibular joint disorders.
I took the liberty of contacting a couple of the distinguished myofunctional experts of orofacial pain, TMD, neck, jaw and head pain management, mentioned in this book and they had said that molded mouth guards should have a flat surface that presses against your other set of teeth. Several reasons were given. Single tooth pressure is not equalized. Another reason is that those with TMD have wearing functions and joint and jaw movements that change.
The number one product selling service online has a company that sells lab molding mouth guards that are fit like a glove on your teeth. Lab molded is best, but having a flat surface that would touch your other set of teeth is best. They have over a thousand reviews at 4.9 star average. It's easy to see that a hired group of people were involved in writing the comments.