Evaluation of the effect of self‐cutting and nonself‐cutting thread designed implant with different thread depth on variable insertion torques: An histomorphometric analysis in rabbits

PURPOSE To evaluate of the effect of self-cutting and nonself-cutting thread designed implant with different thread depth on variable insertion torques. To evaluate the bone volume (BV) and bone to implant contact (BIC) in these variables MATERIALS AND METHODS: Mainly two thread design, V-shaped thread which is self-cutting and power thread design, which is nonself-cutting implants were considered for this study with a variation in thread depth of 0.4 and 0.6 mm for both the designs, respectively. A total of 32 CAD designed machined surface implant prototypes were manufactured of 4 mm in diameter and 8 mm in length were made, which were machined surfaced, which was placed in the femur of 16 New Zealand white rabbits. These were categorized under 2 groups; Group 1 and Group 2 with insertion torques of <30 and >50 Ncm, respectively. After 4 weeks of healing, rabbits were sacrificed and histomophometric and histologic analyses were done to evaluate the bone response. RESULTS Significantly, more BIC was recorded for high torque implants compared with low torque in power-shaped thread design (P value = .01*). BV for new bone formation was statistically significant for V-shaped thread design in high torque when compared with low torque (P value = .02*). CONCLUSION The effect of the depth of the thread design was significant for the power-shaped design in enhancing BIC when compared with V-shaped thread design. With high torque V-shaped thread design had more new bone formation as compared with power-shaped thread design.

[1]  Sun-Young Lee,et al.  The effect of the thread depth on the mechanical properties of the dental implant , 2015, The journal of advanced prosthodontics.

[2]  J. Duyck,et al.  Effect of insertion torque on titanium implant osseointegration: an animal experimental study. , 2015, Clinical oral implants research.

[3]  A. Wennerberg,et al.  The osseointegration stimulatory effect of macrogeometry-modified implants: a study in the rabbit. , 2014, Clinical oral implants research.

[4]  J. Jansen,et al.  Evaluation of primary and secondary stability of titanium implants using different surgical techniques. , 2014, Clinical oral implants research.

[5]  P. Trisi,et al.  Histologic and Biomechanical Evaluation of the Effects of Implant Insertion Torque on Peri-Implant Bone Healing , 2013, The Journal of craniofacial surgery.

[6]  P. Trisi,et al.  High versus low implant insertion torque: a histologic, histomorphometric, and biomechanical study in the sheep mandible. , 2011, The International journal of oral & maxillofacial implants.

[7]  N. Lang,et al.  Influence of lateral pressure to the implant bed on osseointegration: an experimental study in dogs. , 2010, Clinical oral implants research.

[8]  Tao Li,et al.  Optimal design of thread height and width on an immediately loaded cylinder implant: A finite element analysis , 2010, Comput. Biol. Medicine.

[9]  Fawad Javed,et al.  The role of primary stability for successful immediate loading of dental implants. A literature review. , 2010, Journal of dentistry.

[10]  M. Janal,et al.  Biomechanical and bone histomorphologic evaluation of four surfaces on plateau root form implants: an experimental study in dogs. , 2010, Oral surgery, oral medicine, oral pathology, oral radiology, and endodontics.

[11]  J. Jansen,et al.  Bone Particles and the Undersized Surgical Technique , 2010, Journal of dental research.

[12]  E. Baldoni,et al.  Implant micromotion is related to peak insertion torque and bone density. , 2009, Clinical oral implants research.

[13]  R. Jung,et al.  Bone response to loaded implants with non-matching implant-abutment diameters in the canine mandible. , 2009, Journal of periodontology.

[14]  Massimo Del Fabbro,et al.  Immediate occlusal loading and tilted implants for the rehabilitation of the atrophic edentulous maxilla: 1-year interim results of a multicenter prospective study. , 2008, Clinical oral implants research.

[15]  Judith Maria Pinheiro Ottoni,et al.  Correlation between placement torque and survival of single-tooth implants. , 2005, The International journal of oral & maxillofacial implants.

[16]  K. Al-Shammari,et al.  Effects of implant thread geometry on percentage of osseointegration and resistance to reverse torque in the tibia of rabbits. , 2004, Journal of periodontology.

[17]  Lars Sennerby,et al.  Resonance frequency analysis of implants subjected to immediate or early functional occlusal loading. Successful vs. failing implants. , 2004, Clinical oral implants research.

[18]  da Cunha Ha,et al.  A comparison between cutting torque and resonance frequency in the assessment of primary stability and final torque capacity of standard and TiUnite single-tooth implants under immediate loading. , 2004 .

[19]  G. Romanos,et al.  Present status of immediate loading of oral implants. , 2004, The Journal of oral implantology.

[20]  W. Schwarzwäller,et al.  In Vitro Evaluation of Horizontal Implant Micromovement in Bone Specimen With Contact Endoscopy , 2004, Implant dentistry.

[21]  M. Tschabitscher,et al.  Correlation of insertion torques with bone mineral density from dental quantitative CT in the mandible. , 2003, Clinical oral implants research.

[22]  Niklaus P Lang,et al.  De novo alveolar bone formation adjacent to endosseous implants. , 2003, Clinical oral implants research.

[23]  L Sennerby,et al.  Measurements comparing the initial stability of five designs of dental implants: a human cadaver study. , 2000, Clinical implant dentistry and related research.

[24]  D Buser,et al.  Bone response to unloaded and loaded titanium implants with a sandblasted and acid-etched surface: a histometric study in the canine mandible. , 1998, Journal of biomedical materials research.

[25]  M. Ueda,et al.  A comparative study of removal torque of endosseous implants in the fibula, iliac crest and scapula of cadavers: preliminary report. , 1997, Clinical oral implants research.

[26]  L. Skovgaard,et al.  Anchorage of TiO2-blasted, HA-coated, and machined implants: an experimental study with rabbits. , 1995, Journal of biomedical materials research.

[27]  J I Nicholls,et al.  Stress fatigue: basic principles and prosthodontic implications. , 1995, The International journal of prosthodontics.

[28]  Martha Warren Bidez,et al.  Chapter 15 – Scientific Rationale for Dental Implant Design , 2015 .

[29]  G. Benic,et al.  Loading protocols for single-implant crowns: a systematic review and meta-analysis. , 2014, The International journal of oral & maxillofacial implants.

[30]  P. Coelho,et al.  Effect of drilling dimension on implant placement torque and early osseointegration stages: an experimental study in dogs. , 2012, Journal of oral and maxillofacial surgery : official journal of the American Association of Oral and Maxillofacial Surgeons.

[31]  M. Janal,et al.  The effect of implant design on insertion torque and immediate micromotion. , 2012, Clinical oral implants research.

[32]  P. Fugazzotto,et al.  Success and failure rates of osseointegrated implants in function in regenerated bone for 72 to 133 months. , 2005, The International journal of oral & maxillofacial implants.

[33]  Hugo Nary Filho,et al.  A comparison between cutting torque and resonance frequency in the assessment of primary stability and final torque capacity of standard and TiUnite single-tooth implants under immediate loading. , 2004, The International journal of oral & maxillofacial implants.

[34]  P Morberg,et al.  Importance of ground section thickness for reliable histomorphometrical results. , 1995, Biomaterials.