Enhancing Anaesthetic Success in Mandibular Molars With Symptomatic Irreversible Pulpitis: A Comparative Randomized Controlled Trial

The goal of this clinical trial is to assess the effect of * Preoperative intraligamentary corticosteroids injection * Cryotherapy which is cold application on : * Hard tooth structure ( crown of the tooth ) * Soft tissue overlying roots on the efficacy of the inferior alveolar nerve block anaesthesia in patients with mandibular molars with symptomatic irreversible pulpitis. The main question it aims to answer are: • Does intraligamentary dexamethazone injection increase the success rate of inferior alveolar nerve block without the need for oral premedication. Participants will describe their preoperative pain level to the investigator and describe their pain level during the treatment. Researchers will compare cryotherapy to see if it increases the success rate of inferior alveolar nerve block.