Surgical, prosthetic, and systemic factors associated with radiographic marginal bone levels in two-implant-supported splinted restorations: a retrospective study.
- 1Department of Prosthodontics, Institute of Oral Health Science, Ajou University School of Medicine, Suwon, Republic of Korea.
- 2Office of Biostatistics, Medical Research Collaborating Center, Ajou Research Institute for Innovative Medicine, Ajou University Medical Center, Suwon, Republic of Korea.
Abstract
Purpose
This study evaluated the influence of surgical, prosthetic, and systemic factors on marginal bone loss (MBL) in patients restored with two-implant-supported splinted prostheses using radiographic assessment.Materials and methods
Patients who received two-implant-supported splinted restorations between 2019 and 2024 were included. Radiographs obtained at prosthesis delivery and at annual follow-up visits for up to five years were analyzed. Surgical variables included implant diameter, length, insertion depth, inter-implant distance, and bone grafting. Prosthetic variables comprised emergence profile, emergence angle, and implant-abutment connection type. Demographic data and systemic conditions were also recorded. Linear mixed-effects models were used to identify factors associated with MBL (P < .05).Results
A total of 276 implants in 127 patients were analyzed (mean follow-up, 2.2 years). Greater implant insertion depth and external implant-abutment connections were significantly associated with increased MBL, whereas concave emergence profiles were associated with reduced MBL. Implant dimensions, inter-implant distance, bone grafting, systemic conditions, age, and sex were not significantly associated with MBL. The relatively short mean follow-up period (2.2 years) should be considered when interpreting these findings.Conclusion
Within the limitations of this retrospective radiographic study, implant insertion depth, implant-abutment connection type, and emergence profile were significantly associated with MBL in two-implant-supported splinted restorations. Careful consideration of these factors may contribute to improved peri-implant tissue stability, although longer-term studies are needed to confirm these findings.
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BibTeX
@article{yim2026surgical,
title = {{Surgical, prosthetic, and systemic factors associated with radiographic marginal bone levels in two-implant-supported splinted restorations: a retrospective study.}},
author = {Yagee Yim and Seungyoon Lim and Yuseung Yi and SeoYeon Wi and Bumhee Park and Hee-Kyung Kim},
journal = {The journal of advanced prosthodontics},
year = {2026},
month = oct,
doi = {10.4047/jap.2026.18.5.448},
url = {https://europepmc.org/article/MED/42948838},
note = {CC BY-NC},
}
RIS
TY - JOUR
TI - Surgical, prosthetic, and systemic factors associated with radiographic marginal bone levels in two-implant-supported splinted restorations: a retrospective study.
AU - Yagee Yim
AU - Seungyoon Lim
AU - Yuseung Yi
AU - SeoYeon Wi
AU - Bumhee Park
AU - Hee-Kyung Kim
PY - 2026
DA - 2026/10/13
JO - The journal of advanced prosthodontics
DO - 10.4047/jap.2026.18.5.448
UR - https://europepmc.org/article/MED/42948838
AB - Purpose This study evaluated the influence of surgical, prosthetic, and systemic factors on marginal bone loss (MBL) in patients restored with two-implant-supported splinted prostheses using radiographic assessment.Materials and methods Patients who received two-implant-supported splinted restorations between 2019 and 2024 were included. Radiographs obtained at prosthesis delivery and at annual follow-up visits for up to five years were analyzed. Surgical variables included implant diameter, length, insertion depth, inter-implant distance, and bone grafting. Prosthetic variables comprised emergence profile, emergence angle, and implant-abutment connection type. Demographic data and systemic conditions were also recorded. Linear mixed-effects models were used to identify factors associated with MBL (P < .05).Results A total of 276 implants in 127 patients were analyzed (mean follow-up, 2.2 years). Greater implant insertion depth and external implant-abutment connections were significantly associated with increased MBL, whereas concave emergence profiles were associated with reduced MBL. Implant dimensions, inter-implant distance, bone grafting, systemic conditions, age, and sex were not significantly associated with MBL. The relatively short mean follow-up period (2.2 years) should be considered when interpreting these findings.Conclusion Within the limitations of this retrospective radiographic study, implant insertion depth, implant-abutment connection type, and emergence profile were significantly associated with MBL in two-implant-supported splinted restorations. Careful consideration of these factors may contribute to improved peri-implant tissue stability, although longer-term studies are needed to confirm these findings.
SN - 2005-7806
SN - 2005-7814
ER -