The investigators will use two types of material(PRF-Xenograft) in the buccal gap after immediate dental implant placement. The study design has three groups PRF, graft, and control group. The patients will randomly be assigned to groups by envelop method. The resonance frequency analysis device(Osstell) will be used to measure primary and secondary stabilization. Then the investigators will evaluate each materials' contribution to stability.

Pre-op and 9th month Post-op CBCTs will evaluate about bone loss in mesial-distal and horizontal dimensions.

Inclusion Criteria:

• medically healthy,
• only one maxillary aesthetic region(incisors or premolars) tooth which has two adjacent teeth is indicated for extraction.
• intact buccal socket walls
• the gap between buccal socket wall to implant sholder at least 2 mm.

Exclusion Criteria:

• relevant tooth has more than one root,
• smoking,
• alcohol abuse,
• pregnancy,
• immune-suppressive patients,
• any systemic disease.