title: Continuous decompression using a cannulated ceramic pin for simple bone cysts.
abstract: OBJECTIVE
  To report the outcomes of continuous decompression using a cannulated ceramic pin for simple bone cysts (SBCs).
  
  
  METHODS
  Seven boys and 3 girls aged 7 to 16 (mean, 11) years with SBCs underwent curettage and continuous decompression using a cannulated ceramic pin. The pin was made of hydroxyapatite and tricalcium phosphate. The clinical course, radiological findings, and complications were retrospectively assessed.
  
  
  RESULTS
  The mean follow-up duration was 41 (range, 12-84) months. Five patients were evaluated as 'healed', 2 as 'healing with defect', one as 'persistent cyst', and 2 as 'recurrent cysts'. No peri-operative complications were encountered. One patient had a postoperative fracture at the pin insertion site. Seven patients had pain relief and good outcomes; 2 had a thin cortical rim and complained of occasional pain and their sports activities were restricted.
  
  
  CONCLUSIONS
  Decompression using a cannulated ceramic pin for SBCs is minimally invasive, highly osteoconductive, and does not require bone grafting or a second operation to remove the device.
authors.affiliation: Department of Orthopaedic Surgery, Kyorin University, Tokyo, Japan. t-morii@gb3.so-net.ne.jp
authors.forename: T
authors.initials: T
authors.lastname: Morii
authors.forename: K
authors.initials: K
authors.lastname: Mochizuki
authors.forename: K
authors.initials: K
authors.lastname: Satomi
mesh_terms: D000293:Adolescent; D001845:Bone Cysts / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D001858:Bone Nails; D002111:Calcaneus; D002404:Catheterization / Q000295:instrumentation; D002648:Child; D015331:Cohort Studies; D003475:Curettage / Q000295:instrumentation; D019299:Decompression, Surgical / Q000295:instrumentation*; D005260:Female; D005269:Femur; D006801:Humans; D006811:Humerus; D006882:Hydroxyapatites; D008297:Male; D011859:Radiography; D012189:Retrospective Studies; D016896:Treatment Outcome
chemical_list: D006882:Hydroxyapatites; C094280:hydroxyapatite-tricalciumphosphate composite