This randomized clinical study evaluated salivary α-amylase as a non-invasive biomarker of early wound healing after mandibular third molar surgery. The study compared patients who received platelet-rich fibrin (PRF) in the extraction socket with patients who received standard surgical treatment without PRF.

PRF is a material prepared from the patient's own blood and is used to support tissue healing after surgery. Salivary α-amylase is an enzyme found in saliva that may reflect postoperative stress, inflammation, or healing responses. In this study, saliva samples were collected on postoperative days 0, 3, and 7 to measure α-amylase activity.

The study included adult patients aged 18 to 60 years who underwent impacted mandibular third molar surgery at the Dental Hospital of Hasanuddin University, Makassar, Indonesia. The main purpose was to determine whether PRF placement changes salivary α-amylase activity compared with no PRF during the first postoperative week.

This study was designed to evaluate whether platelet-rich fibrin (PRF) placement after impacted mandibular third molar surgery is associated with changes in salivary α-amylase activity during the early postoperative healing period.

Salivary α-amylase was selected because saliva provides a non-invasive medium for monitoring biological responses after oral surgery. PRF was used as an autologous material prepared from the patient's own blood and placed into the extraction socket before suturing. The comparison group underwent the same surgical procedure without PRF placement.

Participants were assigned to two parallel groups: a PRF group and a non-PRF group. Saliva samples were collected during the first postoperative week, specifically on postoperative days 0, 3, and 7. The study compared salivary α-amylase activity between groups and also described changes over time within each group.

The study was conducted at the Dental Hospital of Hasanuddin University, Makassar, Indonesia. Laboratory analysis of salivary α-amylase was performed at the HumRC Laboratory, Faculty of Medicine, Hasanuddin University. The findings are intended to clarify whether salivary α-amylase can serve as a useful non-invasive biomarker for monitoring early wound healing after PRF-assisted mandibular third molar surgery.

Inclusion Criteria:

• Patients aged 18-35 years.
• Patients requiring surgical extraction of impacted mandibular third molars.
• Patients classified as American Society of Anesthesiologists Physical Status Classification class I or II.
• Patients who are willing to participate and provide written informed consent.
• Patients able to comply with study procedures and follow-up visits.

Exclusion Criteria:

• Patients with systemic diseases that may affect wound healing or inflammatory response (e.g., Diabetes Mellitus, immunodeficiency disorders).
• Patients currently using anti-inflammatory drugs, corticosteroids, or antibiotics within the last 7 days before surgery.
• Patients with active oral infection or severe periodontal disease at the surgical site.
• Patients with a history of smoking or tobacco use.
• Pregnant or breastfeeding women.
• Patients with salivary gland disorders or conditions affecting salivary secretion.
• Patients with known bleeding disorders or currently receiving anticoagulant therapy.
• Patients with allergy or contraindication to materials or medications used during the procedure.

De-identified individual participant data underlying the reported results will be shared upon reasonable request, including demographic and clinical characteristics, group assignment, and salivary α-amylase activity values on postoperative days 0, 3, and 7. No direct participant identifiers will be shared.

Data will be available beginning 6 months after publication and will remain available for 5 years.

Qualified researchers may request access to de-identified individual participant data supporting the reported results. Requests must be submitted by email to the corresponding author with a brief research proposal and will be reviewed by the study team. Data will be shared only for scientifically valid purposes and without direct participant identifiers.

Not applicable. No masking was applied in this study.