Department of Oral and Maxillofacial Surgery, Medical University of Vienna, Waehringer Guertel 18-20, 1090, Vienna, Austria.
University Hospital St. Pölten, Dunant-Platz 1, 3100 St Pölten, Austria.
Clin Oral Investig. 2019 Nov;23(11):3951-3957. doi: 10.1007/s00784-019-02826-y. Epub 2019 Jan 28.
There is a long history of studies into cystic lesions of the jaws. However, there is little data on postoperative bone regeneration. The aim of the study was to calculate the size of the residual bone lesions after cystostomies and cystectomies to predict the postoperative bone healing.
This retrospective study focused on patients undergoing cystectomy (n = 114) or cystostomy (n = 86), who were treated for cystic lesions between 2010 and 2015. New formulas were developed to measure the decrease in lesion sizes using the craniocaudal and mesiodistal diameters from preoperative as well as postoperative radiographs (panoramic radiographs, CT scans, CBCT). With these predictive models (calculated by linear regression analyses), it is possible to calculate how the lesions would shrink using initial size of the cyst and time after surgery for both dimensions.
After cystostomy, the mesiodistal size was initial size 6.0 + 0.7 × initial size - 9.4 × time. The craniocaudal size was 5.1 + 0.7 × initial size - 7.3 × time. After cystectomy, the mesiodistal size was 0.4 + 0.7 × initial size - 8.4 × time. The craniocaudal size was 0.4 + 0.5 × initial size - 6.4 × time (R = 0.59 and 0.67, respectively).
These formulas are suggested to be used to calculate residual size of bone lesion after cystostomy and cystectomy to predict postoperative bone healing.
The formulas are based on deliberately simple measurement using only panoramic radiographs to encourage their application in daily clinical practice.
颌骨囊性病变的研究历史悠久。然而，关于术后骨再生的数据很少。本研究旨在计算囊腔切开术和切除术术后残余骨病变的大小，以预测术后骨愈合情况。
本回顾性研究聚焦于 2010 年至 2015 年间接受囊切除术（n=114）或囊腔切开术（n=86）治疗囊性病变的患者。开发了新的公式，使用术前和术后影像学（全景片、CT 扫描、CBCT）的颅底和近远中直径来测量病变大小的减少。使用这些预测模型（通过线性回归分析计算），可以计算出两个维度中病变在初始大小和手术后时间的情况下会如何缩小。
囊腔切开术后，近远中尺寸为初始尺寸 6.0+0.7×初始尺寸-9.4×时间。颅底尺寸为 5.1+0.7×初始尺寸-7.3×时间。囊切除术术后，近远中尺寸为 0.4+0.7×初始尺寸-8.4×时间。颅底尺寸为 0.4+0.5×初始尺寸-6.4×时间（R=0.59 和 0.67）。
这些公式被建议用于计算囊腔切开术和切除术术后残余骨病变的大小，以预测术后骨愈合。
这些公式基于仅使用全景片进行的简单测量，旨在鼓励在日常临床实践中应用。
