title: Developing Stability of Posterior Mandibular Implants Placed With Osteotome Expansion Technique Compared With Conventional Drilling Techniques.
abstract: Clinical decisions regarding the stability and osseointegration of mandibular implants positioned using the bone expansion techniques are conflicting and limited. The objective was to evaluate the stability of implants placed using 2 surgical techniques, selected according to the initial width of the mandibular posterior edentulous ridge, with D3bone density, during a 12-week period. Fifty-eight implants in 33 patients were evaluated. Thirty-two implants in 24 patients were positioned using the osteotome expansion technique, and 26 fixtures in 17 patients were installed using the conventional drilling technique. The implant stability quotient values were recorded at weeks 0, 1, 2, 3, 4, 6, 8, 10, and 12 postsurgery and evaluated using analysis of variance, independent, and paired t tests. Calibrated according to the stability reading of a 3.3-mm diameter implant, the osteotome expansion group was associated with a lower bone density than the conventional group (64.96 ± 6.25 vs 68.98 ± 5.06, P = .011). The osteotome expansion group achieved a comparable primary stability (ISQb-0, P = .124) and greater increases in secondary stability (ISQb-12, P = .07) than did the conventional technique. A D3quality ridge with mild horizontal deficiency is expandable by using the osteotome expansion technique. Although the 2 groups presented similar implant stability quotient readings during the study period, the osteotome expansion technique showed significant improvement in secondary stability. The healing patterns for these techniques are therefore inconsistent.
authors.affiliation: 1   Department of Periodontology, Chang Gung Memorial Hospital, Linkou, Taoyuan, Taiwan.|2   College of Medicine, Chang Gung University, Taipei, Taiwan.
authors.forename: Yen-Ting
authors.initials: YT
authors.lastname: Lin
authors.affiliation: 3   California Northstate University, College of Medicine, Elk Grove, Calif.
authors.forename: Adrienne
authors.initials: A
authors.lastname: Hong
authors.affiliation: 2   College of Medicine, Chang Gung University, Taipei, Taiwan.|4   Department of Prosthodontics, Chang Gung Memorial Hospital at Linkou, Taoyuan, Taiwan.
authors.forename: Ying-Chin
authors.initials: YC
authors.lastname: Peng
authors.affiliation: 1   Department of Periodontology, Chang Gung Memorial Hospital, Linkou, Taoyuan, Taiwan.|2   College of Medicine, Chang Gung University, Taipei, Taiwan.|5   Department of Dentistry, College of Oral Medicine, Taipei Medical University, Taipei, Taiwan.
authors.forename: Hsiang-Hsi
authors.initials: HH
authors.lastname: Hong
mesh_terms: D003758:Dental Implantation, Endosseous; D015921:Dental Implants; D006801:Humans; D008334:Mandible; D016348:Osseointegration; D010027:Osteotomy
chemical_list: D015921:Dental Implants
keywords: bone expansion technique; bone quality; conventional drilling technique; implant stability quotient; mandibular implant