Endoscopic modified medial maxillectomy for odontogenic cysts and tumours

Trans-antral Endoscopic Assisted Excision of Dentigerous and Radicular Maxillary Cyst; our Experience

Background

maxillary cysts of dental origin are not common diagnosis. There is still debate about their perfect treatment method. There are many approaches to manage the odontogenic maxillary cysts; either intraoral, sublabial, or transnasal endoscopic approach. In this study, we present our technique of trans-antral endoscopic assisted excision of maxillary cysts of dental origin with assessing feasibility, results, and complications.

Results

Thirty-two patients were reported; 14 dentigerous cysts (43.75%) and 18 dental (radicular) cysts (56.25%). Complete cyst removal could be achieved in all cases without jeopardizing the maxillary sinus drainage through its natural ostium to the nasal cavity. Postoperative pain and facial swelling were mild in all cases and resolved within few days. No tooth loss, Sino nasal symptoms, infection or recurrence was reported throughout follow-up period ranging from 2 to 6 years.

Conclusion

Trans-antral endoscopic assisted approach for excision of odontogenic maxillary cyst is a reliable, safe, and effective procedure without recurrence, or permanent negative sequels over the long-term follow-up.

Supplementary Information

The online version contains supplementary material available at 10.1007/s12663-022-01772-9.

Novel Application of an Ultrasonic Bone Aspirator for Endoscopic Modified Medial Maxillectomy

Background

Endoscopic modified medial maxillectomy (EMMM) is a surgical technique developed to approach maxillary sinus lesions, such as papilloma and postoperative maxillary cyst, while preserving the postoperative nasal morphology and nasal function. In this technique, a diamond burr is used to remove the bone, which may damage adjacent soft tissue. We developed EMMM using an ultrasonic bone aspirator (UBA) instead of a conventional diamond burr. The purpose of this study was to clarify the effectiveness of the UBA in EMMM in comparison to the conventional diamond burr technique in terms of operative time, intraoperative complications, postoperative symptoms, and recurrence.

Methods

The medical records of all patients who underwent EMMM at Toyama University Hospital between June 2014 and December 2021 were reviewed. Patients who met the inclusion criteria were separated into Group 1, in which the UBA was used for EMMM, and Group 2, in which a drill with a diamond burr was used. Data on patient demographics, operation time, frequency of intraoperative complications and postoperative symptoms, and recurrence were statistically compared between the two groups.

Results

There were no significant differences between the two groups in the patient demographic data, operative time, postoperative symptoms, or frequency of recurrence. The frequency of intraoperative damage to adjacent soft tissues was significantly lower in patients who underwent EMMM with the UBA in comparison to those who underwent EMMM with a conventional diamond burr.

Conclusion

The application of the UBA to EMMM can improve surgical safety and facilitate surgical procedures.

Endoscopic Modified Medial Maxillectomy for Resection of an Inverted Papilloma Originating from the Entire Circumference of the Maxillary Sinus

For treatment of a sinonasal inverted papilloma (IP), it is essential to have a definite diagnosis, to identify its origin by computed tomography (CT) and magnetic resonance imaging (MRI), and to select the appropriate surgical approach based on the staging system proposed by Krouse. Recently, a new surgical approach named endoscopic modified medial maxillectomy (EMMM) was proposed. This approach can preserve the inferior turbinate and nasolacrimal duct. We successfully treated sinonasal IP with EMMM in a 71-year-old female patient. In this patient, the sinonasal IP originated from the entire circumference of the maxillary sinus. EMMM is not a difficult procedure and provides good visibility of the operative field. Lacrimation and empty nose syndrome do not occur postoperatively as the nasolacrimal duct and inferior turbinate are preserved. EMMM is considered to be a very favorable approach for treatment of sinonasal IP.