Changes in bone density and cyst volume after marsupialization of mandibular odontogenic keratocysts.pdf
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Changes in bone density and cyst volume after marsupialization of mandibular odontogenic keratocysts
O
W
gJ Oral Maxillofac Surg
69:1361-1366, 2011
Changes in Bone Density and Cyst
Volume After Marsupialization of
Mandibular Odontogenic Keratocysts
(Keratocystic Odontogenic Tumors)
Yi Zhao, DDS, MSc,* Bing Liu, DDS, PhD,?
Qi-Bing Han, DDS, PhD,? Shi-Ping Wang, MD,§ and
Yi-Ning Wang, DDS, PhD
Purpose: To evaluate bone formation after marsupialization of odontogenic keratocysts (keratocystic
odontogenic tumors) of the mandible.
Patients and Methods: A total of 53 patients with mandibular odontogenic keratocysts underwent
marsupialization. Clinical and radiographic examinations were done at 1, 3, and 6 months postopera-
tively. The bone density of the cyst site was measured on the panoramic radiographs using the Digora.
The volume of the cyst was measured by injection of saline solution into the cyst cavity. Student t test
and Spearman’s rank correlation were used for statistical analysis.
Results: Healing was uneventful in all patients. The diameter of the cysts was 4.1 to 11.0 cm (average
5.4). The panoramic radiographs showed a continuous increase in bone density of the cystic area, with
a 22.42% increase at 1 month, 46.07% at 3 months, and 64.69% at 6 months postoperatively compared
with the preoperative values. The decrease in cyst volume was 19.05% at 1 month, 55.62% at 3 months,
and 79.67% at 6 months postoperatively. The increase in bone density and decrease in cyst volume were
more significant in the first 3 months than in second 3 months (P .01). The increase in bone density
correlated inversely with the decrease in the cyst volume (P .01).
Conclusion: Bone regeneration can occur more rapidly in large mandibular odontogenic keratocysts
after marsupialization with drainage by a cyst plug. After 3 months, secondary enucleation of the cyst can
be performed.
? 2011 American Association of Oral and Maxillofacial Surgeons
J Oral Maxillofac Surg 69:1361-1366, 2011
0dontogenic keratocysts (OKCs), now known by the
orld Health Organization as keratocystic odonto-
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