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Table 1 Comparison between "conventional extraction of complicated roots "and "Expandable Micro-motor Bur technique"

From: Expandable Micro-motor Bur, design of a new device for least invasive extraction of broken teeth roots

Criteria Conventional complicated root-extraction Expandable Micro-motor Bur
Invasion to surrounding anatomical structures (maxillary sinus exposure, nerve injury and innervations disorders) More probable Less probable
Need for mucoperiosteal flap and/or osteotomy of buccal bone More probable No or with less extension
Surgical approach More invasive More conservative
Operative and post-operative complications More probable Less probable
Operation duration Longer Shorter
Stress of practitioner and patient More Less
Success of immediate implant placement Less probable More probable