The International journal of oral & maxillofacial implants · 2026
Clinical Evaluation of Short and Standard-Length Implants in Posterior Regions of the Partially Edentulous Maxilla and Mandible: A Prospective Comparative Study.
СтатьяСравнительное исследованиеНаблюдательное исследованиеНазвание и аннотация: Перевод пока не подготовлен
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Strietzel Frank Peter, Dommisch Henrik
Аннотация
PURPOSE: To compare clinical outcomes of short (6 and 8 mm) and standard-length (11 and 13 mm) implants in posterior sites.
MATERIALS AND METHODS: In this prospective observational study, implant survival and success rates, soft tissue conditions, and marginal bone level change (MBLC) were observed over a period up to 36 months. Short and standardlength OsseoSpeed Astra Tech implants were used to replace two or three missing teeth. A total of 38 patients-with 42 standard-length implants and 64 short implants-were available for follow-up. Data regarding the patients' medical history and clinical and radiographic parameters were analyzed. No implant loss or mobility was recorded throughout the observation period.
RESULTS: Regarding an MBLC of ≥ 2 mm, no significant difference in the success rates of short (76.9%) and standard-length (76.2%) implants was found. Considering MBLC in each group, success rates of short (88.7%) and standard-length (100%) implants differed significantly (log-rank test, P = .028). Compromised medical history, implant site location (maxilla or mandible), bone quality, type of prosthetic restoration (single nonsplinted or splinted crowns or fixed partial dentures), and keratinized mucosa width ≥ 2 mm were not associated with MBLC. Premature cover screw exposure and MBLC ≥ 2 mm were significantly associated within short implants (P = .045) but not standard-length implants (P = .853). Short implants in smokers were at a higher risk of MBLC > 3/10 of implant length compared to nonsmokers (P = .022).
CONCLUSIONS: Short and standard-length implants revealed comparable survival and success rates regarding MBLC ≥ 2 mm but differed significantly considering MBLC > 3/10 of the endosseous implant length. Short implants are more prone to MBLC compared to standard-length implants, especially in smokers or when premature cover screw exposures occur.
MATERIALS AND METHODS: In this prospective observational study, implant survival and success rates, soft tissue conditions, and marginal bone level change (MBLC) were observed over a period up to 36 months. Short and standardlength OsseoSpeed Astra Tech implants were used to replace two or three missing teeth. A total of 38 patients-with 42 standard-length implants and 64 short implants-were available for follow-up. Data regarding the patients' medical history and clinical and radiographic parameters were analyzed. No implant loss or mobility was recorded throughout the observation period.
RESULTS: Regarding an MBLC of ≥ 2 mm, no significant difference in the success rates of short (76.9%) and standard-length (76.2%) implants was found. Considering MBLC in each group, success rates of short (88.7%) and standard-length (100%) implants differed significantly (log-rank test, P = .028). Compromised medical history, implant site location (maxilla or mandible), bone quality, type of prosthetic restoration (single nonsplinted or splinted crowns or fixed partial dentures), and keratinized mucosa width ≥ 2 mm were not associated with MBLC. Premature cover screw exposure and MBLC ≥ 2 mm were significantly associated within short implants (P = .045) but not standard-length implants (P = .853). Short implants in smokers were at a higher risk of MBLC > 3/10 of implant length compared to nonsmokers (P = .022).
CONCLUSIONS: Short and standard-length implants revealed comparable survival and success rates regarding MBLC ≥ 2 mm but differed significantly considering MBLC > 3/10 of the endosseous implant length. Short implants are more prone to MBLC compared to standard-length implants, especially in smokers or when premature cover screw exposures occur.