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Externally connected simple taper retention implants in narrow anterior alveolar ridges: 5–7-year follow-up cohort study

Year: 2026
Type: article
Abstract: BACKGROUND: To investigate the clinical efficacy of the simple taper retention implant with external connection JUST J1 MINI (J1 implant) in narrow anterior alveolar ridges (4.5-5.5 mm) for a follow-up period of 5-7 years. METHODS: This is a prospective cohort study, which included a total of 96 J1 implants in the narrow anterior alveolar ridges without bone augmentation. Patients were followed up for 5-7 years post-superstructure restoration, with analysis of peri-implant tissues' health and comparison of bone level changes. RESULTS: During the 5-7-year follow-up period, four implants failed, resulting in a final survival rate of 95.8%. Bone levels were measured at three-time points: implant placement (T0), final restoration (T1), and final follow-up (T2). The lingual bone level at the implant apex (L0) showed statistically significant differences among T0, T1, and T2 (P < 0.05). None of the measured sites in the maxillary implants exhibited statistically significant differences (P > 0.05), whereas the L0 site in the mandible showed statistically significant differences (P < 0.05). Regarding immediate and delayed implantation, no statistically significant differences were observed (P > 0.05). At the end of the follow-up, peri-implant soft tissues remained healthy, without showing any signs of mechanical failures or biological complications. CONCLUSION: The simple taper retention implant with external connection J1 in the narrow anterior alveolar ridges can achieve functional and aesthetic outcomes, ensuring long-term stability of the peri-implant soft and hard tissues without bone augmentation.
DOI: 10.1186/s12903-026-08224-7
Institution: Nanchang University
Language: English
Subfield: Oral Surgery
Field: Dentistry
Open Access status: gold
Estimated APC paid: $3,190
OpenAlex ID: W7155495987
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Cites: 25
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