Digital Pick-up of Attachments before Registration of Jaw Relations versus Intraoral Pick-up during insertion of CAD/CAM 2-Implant Mandibular Overdentures: Effect on Peri-Implant Bone Height

Nesma M. Mousa, Clinical Demonstrator, Department of Removable Prosthodontics, Faculty of Dentistry, Mansoura University, EgyptFollow
Nermeen E. Elkhamisy, Associate Professor, Department of Removable Prosthodontics, Faculty of Dentistry, Mansoura University, Egypt
Islam H. Kandil, Lecturer, Department of Oral Medicine and Periodontology Diagnosis and Oral Radiology, Faculty of Dentistry, Mansoura University, Egypt
Mohamed M. Fouad, Professor, Department of Removable Prosthodontics, Faculty of Dentistry, Mansoura University, Egypt

Article Type

Original Article

Section/Category

Restorative Dentistry

Abstract

Objective: To compare the effect of digital attachment pick-up technique before jaw relation recording and intraoral pick-up technique during insertion for two-implant mandibular overdentures on peri-implant marginal bone height.

Materials and Methods: Sixteen completely edentulous participants recruited for the study. Conventional complete dentures were constructed, followed by guided placement of two mandibular canine implants with delayed loading. Participants were randomized into two groups based on attachment pickup technique: digital group (n = 8) received a milled overdenture base with digital pickup before the jaw relation record, and intraoral group (n = 8) received a milled overdenture base with intraoral pickup during delivery. Marginal alveolar bone height was measured radiographically at insertion (T0), 6 months (T6), and 12 months (T12). Peri-implant bone loss was calculated over the first six months (T1=T6-T0), subsequent six months (T2=T12-T6), and one year (T3=T12-T0) after insertion. Statistical analysis was performed utilizing the paired t-test and the independent t-test with a significance level of 5% (P-value).

Results: Intragroup comparison, vertical and horizontal bone loss differed significantly between first and second 6-month intervals (P < 0.001), with greater bone loss observed during first 6 months. Between-group comparisons showed significantly lower vertical bone loss in the digital group at T1, T2, and T3 (P < 0.001). Horizontal bone loss was significantly lower in digital group at T1 (P = 0.027) and T3 (P = 0.040), but not at T2 (P = 0.065).

Conclusions: Digital attachment pick-up before jaw relation recording resulted in more favorable preservation of marginal peri-implant alveolar bone.

Keywords

implant overdenture, attachment, digital pick-up, intraoral pick-up, milled denture base

How to Cite This Article

Mousa N , Elkhamisy N , Kandil I , Fouad M . Digital Pick-up of Attachments before Registration of Jaw Relations versus Intraoral Pick-up during insertion of CAD/CAM 2-Implant Mandibular Overdentures: Effect on Peri-Implant Bone Height. Mans J Dent. 2026; 13(3):
Available at: https://doi.org/10.61793/2812-5479.1197