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Comparative analysis of peri-implant marginal bone loss based on microthread location: a 1-year prospective study after loading.

 Dong-Wook Song  ;  Dong-Won Lee  ;  Chong-Kwan Kim  ;  Kwang-Ho Park  ;  Ik-Sang Moon 
 JOURNAL OF PERIODONTOLOGY, Vol.80(12) : 1937-1944, 2009 
Journal Title
Issue Date
Adult ; Aged ; Alveolar Bone Loss/classification* ; Dental Implantation, Endosseous/methods ; Dental Implants* ; Dental Materials/chemistry ; Dental Plaque Index ; Dental Prosthesis Design* ; Dental Prosthesis, Implant-Supported ; Denture, Partial ; Female ; Follow-Up Studies ; Gingival Hemorrhage/classification ; Humans ; Image Processing, Computer-Assisted ; Jaw, Edentulous, Partially/rehabilitation ; Jaw, Edentulous, Partially/surgery ; Male ; Middle Aged ; Periodontal Index ; Prospective Studies ; Radiography, Bitewing ; Surface Properties ; Titanium/chemistry
Alveolar bone loss ; dental implants ; dental radiography ; prospective studies
BACKGROUND: The purpose of the present study was to investigate the short-term effects of microthread location on peri-implant marginal bone levels. METHODS: Two types of implants, one with microthreads placed at the implant top (group A) and the other with microthreads placed 0.5 mm below the implant top (group B), were placed adjacent to each other in the partially edentulous areas of 20 patients. In total, 40 implants were placed. Bone loss around each implant was analyzed after 1 year of functional loading, and gingival parameters (modified plaque index and modified sulcus bleeding index) of the peri-implant soft tissue were evaluated. Bone losses after loading and gingival parameters were compared using the paired t test. RESULTS: The average bone loss was 0.16 (SD: 0.19) mm in group A and 0.30 (SD: 0.22) mm in group B after 1-year of functional loading. The paired t test revealed a significant difference in crestal bone loss between groups A and B in individual patients (P = 0.004). No significant differences were found between the two groups for the gingival parameters. CONCLUSIONS: Less peri-implant bone loss was observed around implants with microthreads placed at the implant top (group A) compared to those in which microthreads were placed below the top (group B). These results indicated that the microthreads acted to stabilize the peri-implant marginal bone, and their locations played an important role in the stabilization process.
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2. College of Dentistry (치과대학) > Dept. of Periodontics (치주과학교실) > 1. Journal Papers
2. College of Dentistry (치과대학) > Dept. of Oral and Maxillofacial Surgery (구강악안면외과학교실) > 1. Journal Papers
Yonsei Authors
Kim, Chong Kwan(김종관)
Moon, Ik Sang(문익상)
Park, Kwang Ho(박광호) ORCID logo https://orcid.org/0000-0003-1942-2986
Lee, Dong Won(이동원) ORCID logo https://orcid.org/0000-0003-1852-7989
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