Your gums and teeth seem fine, from seeing the picture. Apart from general deposits and stains that tend to make your teeth appear yellow and infect your gums, there is nothing that stands out evidently in the image provided. Do also consult a local dentist for a clinical checkup, oral prophylaxis (teeth cleaning) once in 6months will definitely help maintain oral health. Regarding the weak jaw, if you have discomfort biting or feel like you lack a certain
vitamin please get a consult with a general physician too
Next Steps
Oral prophylaxis, clinical in office consult, physician referal