Botox injections

Q: Is it permissible for a dentist to administer Botox injections and lip fillers to a patients face for cosmetic reasons or due to disfigurement as a result of missing teeth etc?

Kurta pocket

Q: Is it sunnat to have one's kurtha pocket on the right hand side of the chest? And have the button flap with the right side on top of the left?

Keeping the Qur'an behind one's back

Q: I have noticed in some parts of the world e.g. Pakistan, they lay great importance on not having the Quran behind ones back, to the extent that even if you are at the back of a small musjid and are reading Quran and someone in the first saff is directly in front of you, they would tell you to move and get very angry about it. On the other hand in many other countries sitting directly behind someone's back and reading Quran is not considered wrong. What is mufti sahebs view on this matter of the Quran behind the back?