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Abstract：
The purpose of this study was to report the clinical efficacy of decompression for 3 cases with large periapical lesions and to review technique details. Three cases with large periapical cystic lesions were treated with decompression after root canal treatment. A traditional decompression technique was used for the first case. After aspiration, mucogingival incision, irrigation, and incisional biopsy, a pediatric endotracheal tube was sutured in place and kept for 3 weeks for lesion debridement. An aspiration/irrigation technique was adopted for the second case. An 18-G needle with a syringe was used to aspirate the cystic lesion. Two needles were then inserted into the lesion; copious saline irrigation was delivered from 1 needle and until clear saline was expressed from the other. For the third case, decompression was accomplished with a surgical catheter that was subsequently replaced with a gutta-percha plug after 1 month. None of the 3 cases underwent complete enucleation and root-end surgery. Healed lesions or lesions in healing were observed after 1 to 2 years. Based on the presented cases and published case reports on decompression, a literature review was provided covering indications, technique details, modification, and prognosis of decompression in endodontics. For large periapical cystic lesions, conservative decompression may be used for certain cases before or in lieu of apical surgery. Decompression enables healing of large, persistent periapical lesions after root canal treatment.
摘要：
目的报告减压术治疗3例较大根尖周病变的临床疗效，并复习技术细节。根管治疗后减压治疗3例根尖周大囊性病变。第一种情况使用了传统的减压技术。吸气后，粘膜牙龈切口，灌溉,切开活检,将小儿气管导管缝合到位,并放置3周进行病灶清创.第二种情况采用了抽吸/冲洗技术。使用带有注射器的18-G针头抽吸囊性病变。然后将两根针插入病变中;从一根针输送大量盐水冲洗,直到从另一根针排出透明盐水。对于第三种情况，减压是通过手术导管完成的,该导管随后在1个月后用古塔胶塞替换.3例患者均未进行完全摘除和根端手术。1～2年后观察到病灶愈合或病灶愈合。根据介绍的病例和发表的减压病例报告，提供了涵盖适应症的文献综述，技术细节，修改,根管减压术的预后。对于大的根尖周囊性病变，在某些情况下，在根尖手术之前或代替根尖手术可以使用保守减压。减压可以治愈大，根管治疗后持续性根尖周病变。
