Hydroxyapatite-coated cylindrical implants in the posterior mandible: 10-year observations

Area of Science:

• Dental Implantology
• Oral Surgery
• Biomaterials Science

Background:

• Hydroxyapatite-coated implants are widely used in dental reconstructions.
• Long-term outcomes in posterior mandibular regions require detailed analysis.
• Factors influencing implant success in diverse bone conditions need investigation.

Purpose of the Study:

• To evaluate the 10-year cumulative survival and non-morbid rates of hydroxyapatite-coated implants in posterior mandibular locations.
• To identify specific posterior tooth regions with higher complication rates.
• To determine factors associated with implant success or failure.

Main Methods:

• A prospective study involving 443 hydroxyapatite-coated cylindrical implants placed in posterior mandibles.
• Clinical and radiographic examinations conducted annually over a 10-year follow-up period.
• Life table analyses performed to calculate cumulative survival and non-morbid rates for different posterior tooth regions.

Main Results:

• Overall 10-year cumulative survival rate was 0.793 +/- 0.025.
• Cumulative non-morbid rates varied by region, with the first premolar at 0.816 and the second molar at 0.507.
• The second molar site showed statistically significantly higher morbidity, particularly with 8-mm implants.
• Presence of keratinized gingiva and hygienic restorations correlated with implant survival.

Conclusions:

• Hydroxyapatite-coated implants demonstrate variable long-term success in posterior mandibular locations.
• The second molar region presents a higher risk for implant complications.
• Implant length, bone conditions, and peri-implant health are critical factors for successful osseointegration and long-term function.