title: The effectiveness of decompression for patients with dentigerous cysts, keratocystic odontogenic tumors, and unicystic ameloblastoma.
abstract: OBJECTIVE
  The aim of this study was to verify the clinical effectiveness of decompression in decreasing the size of a cyst. In addition to the different types of cysts, we tried to reveal what effect host factors, such as the initial size of the lesion and the age of the patient, have on the velocity of cyst shrinkage.
  
  
  METHODS
  With the aid of a panoramic view, we measured the size of the cysts before and after decompression in 13 dentigerous cysts (DCs), 14 keratocystic odontogenic tumors (KTOCs), and 5 unicystic ameloblastoma (UA) cases. The velocity of shrinkage in the three cystic groups was calculated. Relationships between the age of the patient, the initial size of the cyst, and the shrinkage velocity were investigated.
  
  
  RESULTS
  The three types of cysts showed no inter-type differences in their velocity of shrinkage. However, there was a statistically meaningful relationship between the initial size of the lesion and the absolute velocity of shrinkage in the DC group (P=0.02, R=0.65) and the KTOC group (P=0.02, R=0.56). There was also a significant relationship between the age of the patient and the absolute velocity of shrinkage in the KTOC group (P=0.04, R=0.45) and the UA group (P=0.04, R=0.46).
  
  
  CONCLUSIONS
  There was no difference in the decrease in size due to decompression among the different types of cysts. However, the age of the patient and the initial size of the lesion showed a significant relationship with the velocity of shrinkage.
authors.affiliation: Department of Oral and Maxillofacial Surgery, Dental Research Institute, Seoul National University Dental Hospital, Seoul, Korea.
authors.forename: Hyun-Soo
authors.initials: HS
authors.lastname: Park
authors.affiliation: Department of Oral and Maxillofacial Surgery, Korea University Anam Hospital, Seoul, Korea.
authors.forename: In-Seok
authors.initials: IS
authors.lastname: Song
authors.affiliation: Department of Oral and Maxillofacial Surgery, Dental Research Institute, Seoul National University Dental Hospital, Seoul, Korea.
authors.forename: Byoung-Moo
authors.initials: BM
authors.lastname: Seo
authors.affiliation: Department of Oral and Maxillofacial Surgery, Dental Research Institute, Seoul National University Dental Hospital, Seoul, Korea.
authors.forename: Jong-Ho
authors.initials: JH
authors.lastname: Lee
authors.affiliation: Department of Oral and Maxillofacial Surgery, Dental Research Institute, Seoul National University Dental Hospital, Seoul, Korea.
authors.forename: Myung-Jin
authors.initials: MJ
authors.lastname: Kim
keywords: Decompression; Odontogenic cysts; Unicystic ameloblastoma