Introduction: Oral and maxillofacial surgeons regularly perform the procedure of extracting impacted mandibular 3rd molars. Unfavorable postoperative side effects, like trismus in the first few days following surgery, are frequently linked to this procedure. Aim: In this study, conservative treatment, low-level laser therapy, and ultrasound therapy were compared to each other and standard dental care following the surgical removal of an impacted 3rd mandibular molar.
Materials and Methods: Participants in this study included 30 healthy individuals who had previously undergone surgery to extract partially or completely impacted mandibular third molars. They were split into ten groups of ten patients using a randomization process. After having an impacted third molar surgically removed from their mouths, 10 patients in Group A; were given analgesics and antibiotics to treat their pain. In group B patients, an impacted lower third molar was surgically removed, and intraoral, and extraoral low-level laser therapy was also administered. There were ten patients in this group (LLLT). Group C: After the previous medications were prescribed, ten patients with an impacted lower 3rd molar surgically removed were given low-intensity pulsed ultrasound therapy extra orally. This was done after the impacted lower 3rd molar had been surgically removed. After surgery, patients' truisms were evaluated two and seven days later.
Results: The outcomes demonstrated that conservative treatment, ultrasound application, and low-level laser therapy all statistically significantly (p˂0.05) decreased trismus. 
Conclusion: LLLT is more effective than ultrasound and conservative treatment at reducing trismus after surgery to remove impacted mandibular 3rd molars.