Cheap dental implants often fail because of poor planning, low-quality materials and insufficient aftercare. Peri-implantitis and infection can occur when implants are placed without proper bone assessment or patients neglect oral hygiene. Smoking, uncontrolled diabetes and teeth grinding increase the risk of failure. To avoid costly redo dentistry, choose a dentist who uses premium materials, conducts thorough exams and follows sterile protocols. Practise good oral hygiene, avoid smoking and attend regular check-ups.