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Journal of Zhejiang University SCIENCE B 2008 Vol.9 No.8 P.638-648


Effects of different types of palatal lateral excisions on growth and development of maxilla and dental arch

Author(s):  Jun WU, Qian ZHENG, Bing SHI, Tian MENG, Yan WANG, Sheng LI, Li-shu LIAO

Affiliation(s):  State Key Laboratory of Oral Disease, Sichuan University, Chengdu 610041, China; more

Corresponding email(s):   cmuwj@sina.com, zq652@163.com

Key Words:  Lateral excision, Maxilla growth, Dental arch growth, Periosteum, Calcein, Sharpey&rsquo, s fibers

Jun WU, Qian ZHENG, Bing SHI, Tian MENG, Yan WANG, Sheng LI, Li-shu LIAO. Effects of different types of palatal lateral excisions on growth and development of maxilla and dental arch[J]. Journal of Zhejiang University Science B, 2008, 9(8): 638-648.

@article{title="Effects of different types of palatal lateral excisions on growth and development of maxilla and dental arch",
author="Jun WU, Qian ZHENG, Bing SHI, Tian MENG, Yan WANG, Sheng LI, Li-shu LIAO",
journal="Journal of Zhejiang University Science B",
publisher="Zhejiang University Press & Springer",

%0 Journal Article
%T Effects of different types of palatal lateral excisions on growth and development of maxilla and dental arch
%A Jun WU
%A Bing SHI
%A Tian MENG
%A Sheng LI
%A Li-shu LIAO
%J Journal of Zhejiang University SCIENCE B
%V 9
%N 8
%P 638-648
%@ 1673-1581
%D 2008
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.B0720015

T1 - Effects of different types of palatal lateral excisions on growth and development of maxilla and dental arch
A1 - Jun WU
A1 - Qian ZHENG
A1 - Bing SHI
A1 - Tian MENG
A1 - Yan WANG
A1 - Sheng LI
A1 - Li-shu LIAO
J0 - Journal of Zhejiang University Science B
VL - 9
IS - 8
SP - 638
EP - 648
%@ 1673-1581
Y1 - 2008
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.B0720015

Objective: This study aimed to explore the effects of different types of palatal lateral excisions on the growth and development of the maxilla and dental arch, and to investigate the underlying mechanisms. Methods: A total of 112 3-week-old Sprague-Dawley (SD) male rats were randomly divided into a control and 3 experimental groups: the mucoperiosteal denudation group, the mucosal flap excision group, and the periosteum excision group. In the experimental groups, bilateral mucoperiosteal, mucosal flap and periosteum were excised respectively in the lateral one half of the palate. Four rats in each group were randomly chosen for sacrifice every two weeks. The maxilla was dissected following the excision. The widths of the maxilla and dental arch were measured and the histological phenomena were investigated at different phases. At the same time, 12 animals in each group were sequentially injected with calcein every two weeks. Three animals in each group, whose fluorescent labeling was used, were sacrificed for investigating bone formation at Week 8 following injection. Results: (1) Each experimental group presented the constriction of the maxilla and dental arch. The upper first molars in the experimental groups inclined medially. The mucoperiosteal denudation group showed the largest degree of effect followed by the periosteum excision group. The indices of the mucosal flap excision group, which retained the structures of the periosteum layer, had the most approximate values to the control group; (2) Different histological changes among the experimental groups were detected. The fibers penetrated into the palatal bone as sharpey&rsquo;s fibers in the mucoperiosteal denudation group. The pattern of bone deposition was the bundle type. sharpey&rsquo;s fibers were not found in the mucosal flap and periosteum excision groups and the depositions of palatal bone were the lamellar type as those in the control group; (3) The rates of bone deposition in the experimental groups decreased compared with the control group. The rates in different phases were the most approximate values to those of the control group in the mucosal flap excision group, which has the same structure of periosteum as the control group. Conclusion: There were different effects on the growth and development of the maxilla and dental arch in different types of palatal lateral excisions. periosteum is important for bone formation and deposition pattern. The prevention of sharpey&rsquo;s fibers forming and attaching to the palatine can effectively avert the following malformation.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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