Aesthetic problems
There are many things that cause aesthetic problems such as,Teeth discoloratio, that causes due to many reason such as : 
- external reason, propabely there is astain that affect on teeth because of food, beverages and tobacco.
 
- Internal reason, this kind of stains exists inside teeth and there are examples of them like certain medications, injury to teeth and genetics.
 
Small, short and broken teeth, the medical term of it is micro dontia. Sometimes it happened due to hered’tary condition.
- Diastolic (gaps between teeth),  that causes because of many reasons such as, natural growth, abnormal position, Size & Shape of Teeth, missing Teeth, Outgrown Labial Frenum, Periodontitis and Wrong Habits.
 
 
- unequal
 
- Remove dark brown spots on the gums, that causes because of many reasons such as nicotine, food, beverages and tartar.
 
- Cosmetic gums, which should be made a surgury to improve aesthetics and prevent of decay and erosion.
 
- Crowded and damaged teeth, that causes due to lack of space, small jaw and super numerary teeth.
 
- Functional biting problems, which cause because of genetics, missing teeth and small jaw.
 
- Sensitive and/or receding gums, the main reason that cause this is gum disease.
 
- Weak lip and smile lines, which cause because of many reasons such as, genetics, smoking and sun damage.
 
- missing teeth, and this causes due to genetics, gum disease and injury.