The Journal of prosthetic dentistry · 2026
Comparative accuracy of registration pins versus titanium screws for registering dynamic guidance dental implant placement on vascularized bone flap reconstruction: A cohort study.
СтатьяСравнительное исследованиеНазвание и аннотация: Перевод в очереди
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Wang Zichao, Ge Yanjun, Kang Yifan, Shan Xiaofeng
Аннотация
STATEMENT OF PROBLEM: The conventional workflow of computer-assisted implant surgery necessitates the placement of mucosa-embedded registration pins; these have limitations in patients receiving vascularized bone grafts (VBGs) for jaw reconstruction.
PURPOSE: The purpose of this clinical study was to evaluate and compare implant accuracy using registration pin (RP) and titanium screw (TS) registration in dynamic navigated implant placement after reconstruction of the jawbone with VBGs.
MATERIAL AND METHODS: Patients who underwent the vascularized bone flap repair of jaw defects followed by application of dynamic navigation for implant placement in VBGs from March 2022 to May 2025 at Peking University school and hospital of stomatology were included. Accuracy was assessed by comparing preoperative design and postoperative cone beam computed tomography (CBCT) scans. Measurements were made to compare angulation deviation, overall deviation of platform and apex, and bidirectional deviation between groups. Group comparisons were performed using appropriate parametric or nonparametric tests and generalized estimating equations (GEEs) were used to assess the effects of registration method, jaw, implant position, and deviation direction on positional errors.
RESULTS: A total of 17 participants were included, 9 (34 implants) in the RP group and 8 (28 implants) in the TS group. Compared with the RP group, no significant difference in angular deviation and overall deviation was found in the TS group (RP versus TS: 2.88 ±2.14 degree versus 3.02 ±3.71 degree, P=.771; 1.13 ±0.68 mm versus 0.93 ±0.44 mm at platform, P=.656; 1.04 ±0.59 mm versus 1.14 ±0.76 mm at apex, P=.493). In addition, for maxillary implants, the overall deviation at the platform was smaller in the TS group than in the RP group (P=.028).
CONCLUSIONS: Dynamic navigation for implant placement in VBG reconstructed jaws using TSs alignment achieved implant accuracy comparable with that of RPs.
PURPOSE: The purpose of this clinical study was to evaluate and compare implant accuracy using registration pin (RP) and titanium screw (TS) registration in dynamic navigated implant placement after reconstruction of the jawbone with VBGs.
MATERIAL AND METHODS: Patients who underwent the vascularized bone flap repair of jaw defects followed by application of dynamic navigation for implant placement in VBGs from March 2022 to May 2025 at Peking University school and hospital of stomatology were included. Accuracy was assessed by comparing preoperative design and postoperative cone beam computed tomography (CBCT) scans. Measurements were made to compare angulation deviation, overall deviation of platform and apex, and bidirectional deviation between groups. Group comparisons were performed using appropriate parametric or nonparametric tests and generalized estimating equations (GEEs) were used to assess the effects of registration method, jaw, implant position, and deviation direction on positional errors.
RESULTS: A total of 17 participants were included, 9 (34 implants) in the RP group and 8 (28 implants) in the TS group. Compared with the RP group, no significant difference in angular deviation and overall deviation was found in the TS group (RP versus TS: 2.88 ±2.14 degree versus 3.02 ±3.71 degree, P=.771; 1.13 ±0.68 mm versus 0.93 ±0.44 mm at platform, P=.656; 1.04 ±0.59 mm versus 1.14 ±0.76 mm at apex, P=.493). In addition, for maxillary implants, the overall deviation at the platform was smaller in the TS group than in the RP group (P=.028).
CONCLUSIONS: Dynamic navigation for implant placement in VBG reconstructed jaws using TSs alignment achieved implant accuracy comparable with that of RPs.