Ultrasonic vs Rotary Instruments in Impacted Mandibular Third Molar Surgery: Clinical and Salivary CRP Outcomes

NCT07196904 | Completed

• 2 other identifiers: Piezo-CRP-20251428/ĐHYD-HĐĐĐ
• Study Type: interventional
• Target: 22
• Locations: 1 country
• Sites: 1

Brief Summary

In the surgical removal of impacted mandibular third molars, ultrasonic surgical devices (piezosurgery) have been introduced with the expectation of reducing postoperative complications such as swelling, pain, and trismus, compared with conventional rotary instruments. To objectively evaluate the postoperative inflammatory response, salivary high-sensitivity C-reactive protein (hsCRP), a reliable biomarker of acute inflammation, will also be measured. This randomized controlled clinical trial is designed to compare the effectiveness of ultrasonic surgery and conventional rotary instruments in impacted mandibular third molar extraction. The study has two primary objectives:

• To compare clinical outcomes, including swelling, mouth opening limitation, and pain, on postoperative days 2 and 5 between the two surgical methods.
• To assess changes in salivary hsCRP levels by comparing preoperative baseline values with postoperative day 2 values, and to determine differences between the two surgical techniques. A total of 22 patients indicated for bilateral impacted mandibular third molar extractions of similar difficulty will be enrolled. Each patient will undergo one extraction using ultrasonic surgery and the contralateral extraction using rotary instruments, in a randomized split-mouth design. Pain and swelling will be assessed on postoperative days 2 and 5. Saliva samples will be collected preoperatively and on postoperative day 2 for hsCRP analysis using enzyme-linked immunosorbent assay (ELISA). The hypothesis is that ultrasonic surgery will result in reduced pain, swelling, and limitation of mouth opening, as well as lower salivary hsCRP levels, compared with conventional rotary instruments. Findings from this study may provide scientific evidence supporting the use of ultrasonic devices to improve patient outcomes and may highlight the role of salivary hsCRP as a non-invasive biomarker for monitoring inflammation after oral surgery.

Conditions

Impacted Mandibular Third Molar; Pain; Swelling; Trismus; Inflammation

Outcome Measures

Primary Outcomes (1)

• Salivary hsCRP concentration

  High-sensitivity C-reactive protein (hsCRP) levels in saliva measured by ELISA assay. Baseline value before surgery will be compared with postoperative Day 2 levels to assess inflammatory response between groups.

  Preoperative (baseline) and day 2 after surgery

Secondary Outcomes (3)

• Postoperative pain

  Day 2 and Day 5 post-surgery.

• Postoperative swelling

  Day 2 and Day 5 post-surgery

• Mouth opening (trismus)

  Day 2 and Day 5 post-surgery

Study Arms (2)

Ultrasonic Device (Piezosurgery)

EXPERIMENTAL

Surgical extraction of impacted mandibular third molars using an ultrasonic surgical device (piezosurgery). Clinical outcomes (pain, swelling, trismus) and salivary hsCRP levels will be assessed.

Device: Ultrasonic Device (Piezosurgery)

Conventional Rotary Instruments

ACTIVE COMPARATOR

Surgical extraction of impacted mandibular third molars using conventional rotary instruments. Clinical outcomes (pain, swelling, trismus) and salivary hsCRP levels will be assessed.

Device: Conventional rotary instruments

Interventions

Ultrasonic Device (Piezosurgery) DEVICE

Mandibular impacted third molar extraction performed with an ultrasonic surgical device. The piezosurgery device was used exclusively for the osteotomy (bone removal) stage, while conventional rotary instruments were still used for tooth sectioning when required. This selective approach aimed to evaluate whether piezosurgery could reduce surgical trauma compared to full rotary techniques.

Ultrasonic Device (Piezosurgery)

Conventional rotary instruments DEVICE

Mandibular impacted third molar extraction performed entirely with conventional rotary instruments. Both bone removal and tooth sectioning were conducted using high-speed rotary instruments under continuous irrigation. This served as the control arm to compare with the ultrasonic-assisted technique.

Conventional Rotary Instruments

Eligibility Criteria

• Age: 18 Years - 35 Years
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64)

You may qualify if:

• Healthy patients (ASA Physical Status index ≤ 2), aged 18-35 years.
• Patients presenting with bilateral impacted mandibular third molars of comparable difficulty, with the angulation difference between the two teeth not exceeding 15 degrees, as assessed according to the Pell and Gregory classification on panoramic radiographs.
• Patients who agree to participate in the study after being fully informed about the objectives and requirements.

You may not qualify if:

• Patients with acute systemic or oral infection at the surgical sites.
• Patients with clinical evidence of tumors or cystic lesions, or radiolucent lesions larger than 3 mm on radiographs at the mandibular third molar site.
• Patients with a history of antibiotic or anti-inflammatory drug use within 3 weeks prior to study participation.
• Patients with psychiatric disorders, motor dysfunction, or trauma in the maxillofacial region.
• Patients with systemic diseases or medication use that reduces salivary secretion, such as Sjögren's syndrome or prior head and neck radiotherapy.
• Pregnant or breastfeeding women.

Sponsors & Collaborators

• Le Huynh Thien An: lead

Study Sites (1)

University of Medicine and Pharmacy at Ho Chi Minh City, Faculty of Dentistry

Ho Chi Minh City, 700000, Vietnam

Location

MeSH Terms

Conditions

Pain; Trismus; Inflammation

Interventions

Piezosurgery

Condition Hierarchy (Ancestors)

Neurologic Manifestations; Signs and Symptoms; Pathological Conditions, Signs and Symptoms; Spasm; Neuromuscular Manifestations; Nervous System Diseases; Pathologic Processes

Intervention Hierarchy (Ancestors)

Ultrasonic Surgical Procedures; Surgical Procedures, Operative

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: SINGLE
• Who Masked: OUTCOMES ASSESSOR
• Purpose: TREATMENT
• Intervention Model: CROSSOVER
• Sponsor Type: OTHER
• Responsible Party: SPONSOR INVESTIGATOR
• PI Title: Lecturer, Department of Oral Surgery, Faculty of Dentistry

Study Record Dates

• First Submitted: September 20, 2025
• First Posted: September 29, 2025
• Study Start: September 1, 2024
• Primary Completion: May 31, 2025
• Study Completion: August 31, 2025
• Last Updated: October 1, 2025

Record last verified: 2025-09

Data Sharing

• IPD Sharing: Will not share

Locations

VN (1)