Tissue integration of zirconia and titanium implants with and without buccal dehiscence defects—A histologic and radiographic preclinical study

Daniel S. Thoma, Hyun Chang Lim, Kyeong Won Paeng, Ui Won Jung, Christoph H.F. Hämmerle, Ronald E. Jung

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Objective: To histologically and radiographically evaluate soft (primary outcome) and hard tissue integration of two-piece titanium and zirconia dental implants with/without buccal dehiscence defects. Materials & methods: In six dogs, five implants were randomly placed on both sides of the mandible: (a) Z1: a zirconia implant (modified surface) within the bony housing, (b) Z2: a zirconia implant (standard surface) within the bony housing, (c) T: a titanium implant within the bony housing, (d) Z1_D: a Z1 implant placed with a buccal bone dehiscence (3 mm in height, identical width to implant body), and (e) T_D: a titanium implant placed with a buccal bone dehiscence. Two weeks of healing and 6 months of loading were applied on each hemi-mandible, respectively. Results: The median level of the margo mucosae shifted more apically over time in all groups (borderline statistical significance in groups Z1_D: −0.52 mm and T_D: −1.26 mm). The median height of the peri-implant mucosa in groups Z1_D and T_D was greatest at 2 weeks and 6 months, but the linear change in the peri-implant mucosa was statistically significant only for group T_D over time (−1.45 mm). Z1 demonstrated a higher bone-to-implant contact compared to Z2 and T. Minimal change of radiographic marginal bone levels in all groups was observed (<1 mm). Conclusion: When buccal dehiscence was presented, titanium implants presented significant loss of peri-implant mucosal height compared to zirconia implants with a modified surface, due to greater apical shift of the margo mucosae. A modified zirconia surface enhanced osseointegration.

Original languageEnglish
Pages (from-to)660-669
Number of pages10
JournalClinical Oral Implants Research
Volume30
Issue number7
DOIs
Publication statusPublished - 2019 Jul

All Science Journal Classification (ASJC) codes

  • Oral Surgery

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