Services
Complex Root Canal Treatment
Root canal treatment, also known as endodontic therapy, is carried out to save a tooth that is infected or severely decayed. In complex cases with multiple canals, curved or narrow root structures, or when previous treatments have not been successful, careful technique and thorough evaluation are critical.
Dr. Irene Sim utilises techniques and technologies such as dental microscopes and digital imaging for thorough and effective treatment. She uses the Zeiss Microscope, equipped with augmented visualization modes that provide enhanced illumination, allowing her to see regions that are otherwise difficult to visualise. This helps increase the accuracy and efficiency of the procedures she performs.
In each procedure, Dr. Sim removes infected or damaged tissue from inside the tooth, carefully cleans and shapes the root canals, and seals them to prevent further infection, ensuring both functional and aesthetic results.


Corrective Root Canal Treatment
In some cases, a tooth that has undergone a root canal treatment may develop infections or complications, necessitating retreatment. Retreatment involves reopening the tooth, cleaning the canals again, and addressing any missed or re-infected areas. This procedure can be more challenging than the original treatment due to scar tissue, complex canal structures, or material left from the previous procedure.
Dr. Irene Sim focuses on diagnosing and managing cases that require retreatment. She carefully identifies the underlying cause of failure, such as an untreated canal or reinfection, and performs corrections to restore the tooth’s health.
Her thorough approach aims to help patients avoid more invasive procedures like tooth extraction, focusing on preserving the natural tooth and ensuring it remains strong and functional.
Surgical Root Canal Treatment
When conventional root canal therapy is not enough to resolve an infection, surgical endodontics, or apicoectomy, may be required. This procedure involves removing the tip of the tooth’s root (the apex) along with any infected tissue around it. An apicoectomy is often the last resort to save a tooth after other endodontic treatments have failed.
Dr. Sim is well-versed in performing apicoectomy procedures, prioritising patient comfort throughout the process.
Using a range of tools and techniques, she makes a small incision in the gum to access the infected area, carefully removing the root tip and sealing the root canal to prevent further infection.
This minor surgical procedure is carried out under local anesthesia or, for anxious patients, IV sedation or general anesthesia, providing a comfortable experience.


Emergency Endodontics
Dental emergencies, such as severe pain, swelling, or trauma to the teeth, require immediate attention to prevent further complications. Emergency endodontics focuses on addressing urgent cases of infection or damage within the tooth, which may involve root canal treatment to relieve pain and prevent the infection from spreading.
Dr. Irene Sim is committed to providing prompt and effective care for patients facing dental emergencies. Whether it’s due to an acute infection, traumatic injury, or a sudden flare-up of pain, Dr. Sim offers rapid assessment and treatment options to save the tooth and restore oral health. Dr. Irene’s clinic at Nuffield Dental Jewel is fully equipped for urgent care, offering flexible emergency appointments.

IV Sedation & General Anaesthesia
For patients requiring additional comfort during dental treatments, Dr Irene provides treatment options under local anesthesia, IV sedation, or general anesthesia.
Her expertise in managing complex cases, paired with the use of dental technologies, ensures excellent results, even in the most challenging dental conditions.
Endodontics for International Patients
Dr. Irene Sim is known for her expertise in treating international patients who come to Singapore for high-quality, specialised dental care. As an experienced endodontist, she understands the unique challenges that international patients face, from coordinating travel and accommodation to managing treatment timelines during their stay.
For international patients, Dr. Sim offers a comprehensive range of endodontic services, including complex root canal treatments, surgical procedures, and emergency care. She works closely with each patient to ensure a seamless experience, from initial consultation to follow-up care. Virtual consultations are available to discuss cases and plan treatments before patients arrive in Singapore.
The clinic staff can assist with scheduling treatments to accommodate travel plans, and Dr. Sim is committed to providing a smooth, efficient process, ensuring that international patients receive world-class endodontic care with minimal disruption to their travel schedules. Special arrangements can also be made for patients requiring IV sedation or general anaesthesia, ensuring a comfortable and stress-free experience.


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Options for Anxious Patients or Complex Cases Requiring Sedation At Nuffield Dental Jewel, located at Wheelock Place, Dr. Irene Sim offers in-house IV sedation and general anaesthesia for patients who experience significant anxiety or require additional comfort during complex endodontic procedures. This ensures a seamless and convenient experience for patients, with all sedation options managed within the clinic by a specialised team.
IV Sedation allows patients to remain in a deeply relaxed state while being conscious and responsive throughout the procedure. It’s ideal for anxious patients who want to feel at ease without being fully unconscious.
For more extensive or complex cases, General Anaesthesia is available, ensuring patients are fully asleep and unaware of the treatment being performed.
By offering these sedation options in-house, Dr. Sim and her team ensure a high level of safety and comfort, with every procedure overseen by experienced anaesthesiologists. This allows for a smooth, worry-free treatment experience, helping even the most anxious patients receive the care they need in a stress-free environment.
