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Recognizing the peak bone mass (age 30) as a cutoff point to achieve the success of orthodontic implants

  • Yu-Chuan Tseng
  • Chia-Chun Tsai
  • Jung-Hsuan Cheng
  • Szu-Ting Chou
  • Chin-Yun Pan
  • Ping-Ho Chen
  • Chun-Ming ChenEmail author
Original Article


The aim of present study was to investigate the critical risk factor (age 30: peak bone mass) to evaluate the success of orthodontic implants. A total of 426 orthodontic implants were placed in 270 patients as orthodontic anchorages. Data were analyzed according to patient’s characteristics, location of placement, implant categories, and orthodontic force. The young patients were the age ≤ 30 years and the older patients were the age > 30 years. Statistical analysis was performed and a p value < 0.05 was considered to indicate statistical significance. The Chi-square or Fisher exact test was used depending on sample sizes. The null hypothesis was no statistically significant correlation between age ≤ 30 years and age > 30 years. The overall success rate (with and without predrill) was 89.2%. The success rate of orthodontic implants was significantly larger in younger patients (89.9%) than in older patients (76.1%). Recognizing age-related factor in the success rates, older patient (> 30 years) were significant lower than young patients (≤ 30 years) in the gender (female and male), malocclusion (Class II), facial pattern (ortho and hyperdivergent), location (infrazygomatic crest), jaw (maxilla), side (right), material (titanium and stainless), length (9 mm and 10 mm), diameter (2 mm), load (< 3 weeks), and force (intrusion). Therefore, the null hypothesis was rejected. Age 30 is a cutoff point to achieve the success of orthodontic implants. The success rates of older patients (age > 30 years) were significant lower than young patients (age ≤ 30 years), especially in female.


Orthodontic implant Success rate Peak bone mass Age Risk factors 


Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflicts of interest.


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Copyright information

© The Society of The Nippon Dental University 2019

Authors and Affiliations

  1. 1.School of Dentistry, College of Dental MedicineKaohsiung Medical UniversityKaohsiungTaiwan
  2. 2.Department of OrthodonticsKaohsiung Medical University HospitalKaohsiungTaiwan
  3. 3.Department of Oral and Maxillofacial SurgeryKaohsiung Medical University HospitalKaohsiungTaiwan

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