Rationale for a reverse tapered body shift implant for immediate placement

Christiaens, Véronique; Pitman, Jeremy; Glibert, Maarten; Hommez, Geert; Atashkadeh, Mandana; Bruyn, Hugo De

doi:10.1016/j.ijom.2020.04.007

Cited by 8 publications

(6 citation statements)

References 26 publications

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“…28 This highlights the utility of a dual-axis design as the clinician can then more directly follow the path of available bone. 29 This offers many advantages: mitigating the risk of apical socket perforation and need for additional grafting; engaging more bone for increased primary stability; higher frequency of the ability to deliver screwretained retorations [30][31][32] and avoidance of potential biologic complications from cement 33 or over-contoured restorations that may place unwanted pressure on gingival tissues 34 ; increased buccal gap distance resulting in optimization of thick buccal plate for functional and esthetic longer-term stability. 10 It has been shown in a recent prospective study that the average Pink Esthetic Score (PES) 35 of these dual-axis body-shift implants with SAC, when placed immediately into flapless extraction sockets in combination with dual-zone socket management and immediate provisionalization, is 12.79.…”

Section: Anatomy Of the Maxillary Anterior Alveolus In Relation To Th...mentioning

confidence: 99%

A comparative analysis of dual‐axis implants placed into maxillary anterior extraction sockets versus virtual planning with uniaxial implants: A simulated cone beam computed tomography study of implant length and diameter

Song

Chu

et al. 2023

J Esthet Restor Dent

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Objective The biaxial nature of the anterior maxilla poses a surgical and restorative challenge in implant dentistry. The present study sought to investigate the apical socket perforation rate (ASPR) from a simulated uniaxial implant placement and to determine the effect of implant length and diameter on ASPR when a uniaxial implant was placed compared with the orientation of the pre‐existing dual‐axis implant. Material and Method Cone beam computed tomography (CBCT) scans from the database of three private practices were searched for patients who received dual‐axis implants within the esthetic zone in immediate tooth replacement therapy. A uniaxial implant was virtually placed using the pre‐existing screw access channel of the dual‐axis implant as a reference. The closest length and diameter were selected for the simulated implant. ASPR by the uniaxial implant was recorded. In addition, the affordable maximum length of a corresponding uniaxial implant that would avoid apical socket perforation was measured. Result Eighty‐one patients with a total of 101 dual‐axis dental implants were selected for analysis. A simulated virtual surgical planning with uniaxial implants revealed high ASPR (48.51%). When the length of the uniaxial implant was reduced to 11 and 9 mm, ASPR was decreased to 41.58% and 20.79%, respectively. Conclusion Dual‐axis implant design effectively evades anatomical challenges in the anterior maxilla (esthetic zone). Considering the current evidence, efforts should be made to carefully consider the angular disparity between the extraction socket‐alveolus complex and the future restorative emergence so that a harmonious biologic‐esthetic result may be more predictably and consistently obtained.

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Section: Anatomy Of the Maxillary Anterior Alveolus In Relation To Th...mentioning

confidence: 99%

A comparative analysis of dual‐axis implants placed into maxillary anterior extraction sockets versus virtual planning with uniaxial implants: A simulated cone beam computed tomography study of implant length and diameter

Song

Chu

et al. 2023

J Esthet Restor Dent

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“…Attempting to reduce the number of surgical interventions, implant placement simultaneous with sinus lifting [1][2][3] and tooth extractions [4,5] has been advocated. Both procedures are considered being technically sensitive requiring experience from the implant surgeon [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

“…In an attempt to optimize the use of the host bone present in extraction sites, a dental implant with an "inverted body shift" has been introduced and described [25]. This implant is characterized by an increase in its outer diameter aimed at engaging the socket walls [3,19,21,26] rendering it unsuitable for healed implant sites.…”

Section: Introductionmentioning

confidence: 99%

Biomechanical Performance of a Novel Implant Design in Simulated Extraction Sites and Sinuslift Procedures

et al. 2023

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With increasing experience and in an attempt to shorten overall treatment times, implant placement in combination with tooth extractions and sinus lift procedures has become popular. In both cases, primary stability has to be achieved by either engaging apical and oral regions of trabecular bone or by engaging residual host bone beneath the sinus cavity. Extraction sites were formed by pressing a root analog into homogeneous low density polyurethane foam which was used as bone surrogate while a 3 mm thick sheet of medium density foam was used for mimicking a sinus lift situation. Two types (n = 10) of bone level implants with a conventional tapered design and a cervical back taper (NobelActive; control) and a novel design characterized by a shift in core diameter and thread geometry (AlfaGate; test) were placed in these models following conventional osteotomy preparation. Insertion torque was measured using a surgical motor and primary stability was determined by resonance frequency analysis. Statistical analysis was based on Welch two sample t tests with the level of significance set at α = 0.05. In sinuslifting, NobelActive implants required significantly higher insertion torques as compared to AlfaGate (p = 0.000) but did not achieve greater implant stability (p = 0.076). In extraction sites, AlfaGate implants showed both, significantly higher insertion torques (p = 0.004) and significantly greater implant stability (p = 0.000). The novel implant design allowed for greater primary stability when being placed in simulated extraction sockets and sinuslift situations. While in extraction sockets the position of condensing threads in combination with an increase in core diameter is beneficial, the deep cervical threads of the novel implant lead to superior performance in sinuslift situations.

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“…Often the base of the edentulous ridge is wider than the narrower coronal portion. Hybrid macro implants can be used to match the anatomy of such shapes and sites with recent preclinical and clinical studies supporting its purpose (Inverta Co‐Axis, Southern Implants, Pty, Irene, South Africa) 13‐18 . This implant design incorporates a “body‐shift” or change in diameter (wide to narrow), shape (tapered to cylindrical), and thread pattern (deep to shallow) in a singular body form.…”

Section: Introductionmentioning

confidence: 99%

“…Hybrid macro implants can be used to match the anatomy of such shapes and sites with recent preclinical and clinical studies supporting its purpose (Inverta Co-Axis, Southern Implants, Pty, Irene, South Africa). [13][14][15][16][17][18] This implant design incorporates a "body-shift" or change in diameter (wide to narrow), shape (tapered to cylindrical), and thread pattern (deep to shallow) in a singular body form. The overall configuration of the implant is "inverted" or "converge" toward the implant-abutment interface where bone is thinnest and less vascular vs divergent, as in traditional tapered implant designs where the widest portion is at the implant platform.…”

Section: Introductionmentioning

confidence: 99%

Managing restorative space, color matching, and tooth replacement with a novel implant through interdisciplinary treatment: A case report of partial anodontia and malformed teeth in the esthetic zone

Chu

Sarnachiaro²,

Mieleszko³

et al. 2020

J Esthet Restor Dent

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A case report of tooth agenesis and excessive intraarch space due to tooth size discrepancies and malformed teeth is presented. Interdisciplinary treatment including orthodontics, implant surgery, prosthodontics, and laboratory fabrication with dissimilar restoration and material types was used to accomplish an esthetic and functional outcome. Proper diagnosis of individual tooth width and proportion were key elements in treatment. Clinical Significance Knowledge and understanding of the relationships of the mandibular to maxillary anterior teeth and shade management of dissimilar restoration types will allow the interdisciplinary team to achieve the desired esthetic restorative result.

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Rationale for a reverse tapered body shift implant for immediate placement

Cited by 8 publications

References 26 publications

A comparative analysis of dual‐axis implants placed into maxillary anterior extraction sockets versus virtual planning with uniaxial implants: A simulated cone beam computed tomography study of implant length and diameter

A comparative analysis of dual‐axis implants placed into maxillary anterior extraction sockets versus virtual planning with uniaxial implants: A simulated cone beam computed tomography study of implant length and diameter

Biomechanical Performance of a Novel Implant Design in Simulated Extraction Sites and Sinuslift Procedures

Managing restorative space, color matching, and tooth replacement with a novel implant through interdisciplinary treatment: A case report of partial anodontia and malformed teeth in the esthetic zone

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