Journal of the Korean Association of Oral and Maxillofacial Surgeons

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Abstract

Purpose: This study was done to know the usefulness of fractal analysis when evaluating the radiologic changes after decompression on jaw bone cystic lesions using fractal analysis. Materials and methods: 30cases of cystic lesions were followed up after decompression. Panoramic image was used to observe radiologic changes around the cystic lesion. The part of the panoramic image which showed radiologic change was defined as region of interest(ROI); The fractal dimension of the ROI was calculated using box-counting method. Results: Using sign-rank test, there was a statistically significant difference in fractal dimensions after decompression therapy(P<0.0001). The fractal dimensions statistically increased after decompression(the median of D:0.12). Conclusions: The ROI after decompression showed higher fractal dimensions which offer the objective proof of the bone healing around cystic lesions after decompression treatment.

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(J. Kor. Oral Maxillofac. Surg. 2007;33:511-517)홍 순 민134-010 서울특별시 강동구 길동 445한림대학교 강동성심병원 구강악안면외과Soon-Min HongDept. of OMFS, Kang Dong Sacred Heart Hospital, Hallym Univ.445 Gil-dong, Gangdong-gu, Seoul, 134-010, KoreaTel: 82-2-2224-2333 Fax: 82-2-483-9647E-mail: omfshong@hallym.or.krMEASUREMENT OF MAXILLARY SINUS VOLUME FOR THE PLACEMENT OF GRAFT MATERIAL- A CASE CONTROL STUDY USING CT IMAGEHyung-Wook Kim1, Seul-Ki Lee2, Jae-An Chung3, Jin-Eob Shin3, Yun-Sub Um1, Ki-Young Kim1, Jong-Sik Kim1, Yun-Jung Song3, Soon-Min Hong1, Jun-Woo Park1

Abstract

Purpose: The aim of this study is to determine whether a difference in the amount of bone graft material is needed between edentulous patients and dentulous patients and to calculate the amount of augmentation for a sinus lift procedure. Methods: 19 patients (20 sinuses) were included to measure maxillary sinus volume. Facial CT scanning was performed using MX 8000 IDT CT devices (Philips, USA). And it was used for IDLvm (The IDL Virtual Machine) 6.0, CT Volume Analyzer Ver 2.3 program to measure maxillary sinus volumes Results: At edentulous patients, volumes (mean±SD) of the inferior portion of the sinuses were 0.56±0.13 cm3 (5mm height), 2.35±0.57 cm3 (10mm height), 4.85±1.10 cm3 (15mm height). At dentulous patients, volumes (mean±SD) of the inferior portion of the sinuses were 0.41±0.18 cm3 (5mm height), 1.76±0.42 cm3 (10mm height), 3.80±0.84 cm3 (15mm height). A significant correlation was found between augmentation height (5mm, 10mm, 15mm) and the calculated sinus volume. (p=0.027, p=0.018, p=0.044) Conclusions: A significant correlation was found between augmentation height (5mm, 10mm, 15mm) and the calculated sinus volume. Detailed preoperative knowledge of sinus lift augmentation volume is helpful in determining the appropriate amount of the bone graft material.