The Clinical Application of Minimally Invasive Coronectomy with Piezosurgery

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Gang Zhou et al.

Abstract

To evaluate the clinical feasibility of minimally invasive coronectomy with piezosurgery for the impacted mandibular third molar,which is in contact with the inferior alveolar nerve.


Methods:Minimally invasive coronectomy was carried out with piezosurgery to remove the crown while the roots retained in the alveolar bone ,then the operation time and the complications of minimally invasive coronectomy and coronectomy were compared.Six months after the operation,curved tomogarphy and CBCT were reviewed to evaluate and measure the displacement distance of the root, and remove the root in the second minimally invasive surgery.


Results:There was no significant difference in operation time between the two groups.Intraoperative complications and inferior alveolar nerve injury occurred in neither group.The incidence of moderate severe swelling and mouth-opening limitation was significantly lower in the minimally invasive coronectomy group than in the coronectomy group.There was no significant difference in the incidence of postoperative bleeding,nerve injury,moderate severe pain,dry socket disease and subcutaneous emphysema between the two groups.The roots were all displaced forward and upward six months after operation,The average displacement distance was 2.58mm and 2.62mm,respectively.No inferior alveolar nerve injury occurred in the second minimally invasive extraction of root.


Conclusion:The incidence of inferior alveolar nerve injury after minimally invasive coronectomy with piezosurgery is low,and the postoperative complications (swelling and mouth-opening limitation)are significantly reduced,which makes it worth clinical promoting.

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