Experts' consensus on space management of mixed dentition

Weihua Guo; Jun Wang; Xu Chen; Xiaojing Wang; Wei Zhao; Guangtai Song; Li'an Wu; Beizhan Jiang; Qiong Zhang; Jun Wang; Yu Li; Ning Zhao; Jiali Tan; Huang Li; Rui Shu; Chenchen Zhou; Lei Fu; Xuepeng Chen; Jing Zou

doi:10.7518/hxkq.2022.03.003

Experts' consensus on space management of mixed dentition

Hua Xi Kou Qiang Yi Xue Za Zhi. 2022 May 25;40(3):264-270. doi: 10.7518/hxkq.2022.03.003.

[Article in English, Chinese]

Authors

Weihua Guo¹, Jun Wang², Xu Chen³, Xiaojing Wang⁴, Wei Zhao⁵, Guangtai Song⁶, Li'an Wu⁴, Beizhan Jiang⁷, Qiong Zhang¹, Jun Wang⁸, Yu Li⁸, Ning Zhao⁹, Jiali Tan¹⁰, Huang Li¹¹, Rui Shu¹, Chenchen Zhou¹, Lei Fu¹², Xuepeng Chen¹³, Jing Zou¹

Affiliations

¹ State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Dept. of Pediatric Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China.
² Dept. of Pediatric Dentistry, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine & College of Stomatology, Shanghai Jiao Tong University, National Clinical Research Center for Oral Diseases & Shanghai Key Laboratory of Stomatology, Shanghai 200011, China.
³ Dept. of Pediatric Dentistry, School and Hospital of Stomatology, China Medical University & Liaoning Province Key Laboratory of Oral Disease, Shenyang 110002, China.
⁴ Dept. of Pediatric Dentistry, School of Stomatology, The Fourth Military Medical University, State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Provincial Clinical Research Center for Oral Diseases, Xi'an 710032, China.
⁵ Dept. of Pediatric Dentistry, Guanghua School of Stomatology, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510055, China.
⁶ Dept. of Pediatric Dentistry, School and Hospital of Stomatology, Wuhan University & State Key Laboratory Breeding Base of Basic Science of Stomatology, Hubei Province & Key Laboratory of Oral Biomedicine (Wuhan University), Ministry of Education, Wuhan 430000, China.
⁷ Dept. of Pediatric Dentistry, The Affiliated Stomatology Hospital of Tongji University, Shanghai 200010, China.
⁸ State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Dept. of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China.
⁹ Dept. of Orthodontics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine & College of Stomatology, Shanghai Jiao Tong University, National Clinical Research Center for Oral Diseases & Shanghai Key Laboratory of Stomatology, Shanghai 200011, China.
¹⁰ Dept. of Orthodontics, Guanghua School of Stomatology, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510055, China.
¹¹ Dept. of Orthodontics, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing 210008, China.
¹² Dept. of Stomatology, The First Hospital of Nanchang, Nanchang 330008, China.
¹³ Dept. of Orthodontics, Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine & Clinical Research Center for Oral Diseases of Zhejiang Provincial & Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou 310006, China.

Abstract
in English, Chinese

The mixed dentition stage is the period between primary and permanent dentition. The following biological processes are complicated and variable: jaw growth, development of inherited permanent teeth embryo, physiological absorption of primary teeth, restoration of surrounding alveolar bones, and growth and function establishment of soft tissues. For the normal development of the jaw, the establishment of the good occlusion relationship, development, and function of soft tissue is very important, whether or not the primary teeth are normally replaced by the permanent teeth in the mixed dentition stage. The eruption space is linked to the normal replacement of primary and permanent teeth. The presence of a mixed dentition space results in the incidence and progression of malocclusion and impacts the normal growth and development of the occlusion, jaw, and face. Space management in the mixed dentition stage is a crucial means to prevent and reduce malocclusion. The following were discussed and analyzed: the possible space problems, why the size of the space was affected, the content that needs to be assessed, and the methods of space management in the mixed dentition that can be used to unify and standardize the management of mixed dentition. This paper was developed to serve as a guide for regulated space management during the mixed dentition period.

混合牙列期是乳牙列向恒牙列转化的过渡期，生物学过程复杂多变，伴随颌骨生长、继承恒牙胚发育、乳牙牙根的生理性吸收、周围牙槽骨的改建及软组织的生长和功能的建立。混合牙列期的乳恒牙是否正常替换，对颌骨的正常发育、良好咬合关系的建立和软组织的发育及其功能发挥起着十分重要的影响。而乳恒牙的正常替换与恒牙萌出间隙密切相关。混合牙列间隙异常不仅直接关系此期错牙合畸形的发生、发展，甚至影响牙合、颌及面的正常生长发育。因此，混合牙列期的间隙管理是预防、降低错牙合畸形发生率及严重程度的重要手段。本文从混合牙列期可能出现的间隙问题、影响间隙大小的原因、混合牙列期间隙管理需要评估的内容和间隙管理的方法等方面进行讨论和分析，以期为规范化混合牙列期间隙管理提供参考。.

Keywords: early treatment; expert consensus; malocclusion; mixed dentition; space management.

Abstract in English, Chinese

Abstract
in English, Chinese