the purpose of this trial is to evaluate the osseointegration properties of nano-hydroxy apatite coated titanium implants in posterior maxilla. 30 patients will be included in this trial divided into two groups, control and intervention. Primary and secondary implant stability will be measured

Inclusion Criteria:

1. Patients with missing at least one maxillary posterior tooth
2. Patients free from any systemic disease
3. Patients who approve to be included in the trial and sign the informed consent
4. Patients with no intra-bony defect.
5. Adults aged 18 years old and above

Exclusion Criteria:

1. Patients who are allergic to titanium
2. Heavy smoker patient
3. Patients receiving chemotherapy or radiotherapy
4. Patients who refused to be included in the trial