Retrospective Cohort Study: Five-Thread Guideline for Predicting Dental Implants Stability in Fresh Extraction Sites

Fahad K. Alwthinani, Nouf Al Humayyani — 2025-05-10

While established best practices exist for the sizing and positioning of dental implants, there is a notable lack of guidelines tailored to assist clinicians in predicting primary implant stability in fresh extraction sites. [1,2,3] Accurately forecasting an implant’s surgical success is critical for clinicians for two primary reasons: First, it guides treatment decisions. if conditions for successful placement are suboptimal, alternative plans, such as site development, should be considered. Secondly, precise prediction of surgical outcomes fosters a strong doctor-patient relationship, as communicating a no, low, medium, or high likelihood of success is essential for maintaining this rapport. [4] This retrospective cohort study aims to evaluate the predictive value of the Five-Thread Guideline (5-TG), which posits that engaging at least five implant threads in native bone correlates with high primary stability. [5] The study assessed four qualitative levels of stability probability: none, low, moderate, and high. Among the 150 cases analyzed, the 5-TG demonstrated significant predictive accuracy indicated by (p<0.0000207). Consequently, this guideline could be regarded as an essential tool for forecasting implant stability when planning dental procedures in newly extracted sites.

Efficacy of a Novel, Dentin-Derived, Xenogeneic Bone Graft Material in a Clinically Relevant PorcineModel: A Comparative Study

Lari Sapoznikov, Martin Humphrey — 2025-09-25

Tooth dentin-derived autogenous bone graft material is very effective for dental bone defect repair but is limited by the need for sufficient material. A xenogeneic material with retained organic matrix, Ivory Dentin Graft, has thus been developed. The properties of this material in comparison to a bone-derived material were examined in a clinically relevant porcine model. Using a split-mouth design, two types of bone defects were created and grafted using either Ivory Dentin Graft or a bone-derived material with retained organic component. The extraction site of an extracted mandibular incisor modelled post-extraction socket preservation, while a mandibular sub-periosteal pouch modelled bone augmentation in procedures such as sinus lifting. At 10 weeks after grafting, when new bone growth and site remodeling is active, the graft sites were solid, dense and stable with no sign of loose particles with both materials. The dentin-derived material was distinguished by having a much higher mean percentage of intimate contact between the graft material and new bone growth (77.5% versus 45.5%) which was statistically different (p < 0.001, paired t-test, 2-tailed). This confirms that Ivory Dentin Graft retains the key property of autologous dentin, of forming an ankylosed network with new bone ingrowth which is key for early and maintained graft site stability.

International Journal of Dental Sciences and Research

Retrospective Cohort Study: Five-Thread Guideline for Predicting Dental Implants Stability in Fresh Extraction Sites

Efficacy of a Novel, Dentin-Derived, Xenogeneic Bone Graft Material in a Clinically Relevant PorcineModel: A Comparative Study