Analysis of the effects of prepared porcelain veneers and unprepared porcelain veneers on gingival crevicular flora based on high‑throughput sequencing

Abstract

The effect of tooth preparation on the gingival crevicular flora of abutment teeth during porcelain veneer treatment is not clear. The purpose of the present study was to analyze the difference between prepared porcelain veneers and unprepared porcelain veneers on gingival crevicular flora. High-throughput sequencing was used in the present study. A total of 20 patients (40 anterior teeth) with veneer restoration of anterior teeth were enrolled. They were divided into two groups: The prepared porcelain veneer group (group P, 11 cases, 19 anterior teeth) and unprepared porcelain veneer group (group U, 9 cases, 21 anterior teeth). After 2 years of follow-up, the restoration and healthy natural gingival crevicular fluid were collected to extract bacterial DNA. 16S ribosomal DNA high-throughput sequencing technique was used to compare the diversity of gingival sulcus flora structure between the prepared porcelain veneer and unprepared porcelain veneer groups. In addition, a healthy control group (group H) was also used for comparison. The Shannon index of the group U was lower than that of group H and group P. The abundance of Proteus in group U was higher than that in group H and group P at the phylum level (P<0.05). At the genus level, the abundance of Porphyromonas, Prevotella and Actinomycetes in group U was significantly higher than that in group H and group P (P<0.05). Compared with the group P, the bacterial diversity of the group U was lower, and the proportion of gingival sulcus pathogenic bacteria was higher. The unprepared porcelain veneer had a certain adverse effect on the periodontal tissue.

The Effect of Various Preparation and Cementation Techniques of Dental Veneers on Periodontal Status: A Systematic Review and Meta-Analysis

“…Ultimately, 10 articles of different methodologies were considered for inclusion in this review. 19 20 21 22 23 24 25 26 27 28 Table 1 presents the information related to the various demographic characteristics selected for the review, such as the mean age of the participants, their gender ratios, and the year of the study. The table presents an overview of the characteristics of the studies included in this analysis of veneer treatments.…”

“…27 Finally, Zhang et al's research conducted in 2021 encompassed 20 participants aged 18 to 44 years, with a gender distribution of 45% male and 55% female. 28 Collectively, these studies exhibit considerable variability in sample size, age composition, and gender distribution, indicative of the diverse populations and contexts in which veneer treatments are explored.…”

Evaluation of E-max Porcelain Veneer Failures: A Retrospective Study

“…Evidence-based retrospective studies, ranging from five to 20 years, have documented the success of porcelain veneer therapy and its favorable clinical performance [12,13]. Reports on minor complications, such as the incidence of postoperative sensitivity (greater than 20%) and the incidence of postoperative pulpitis (less than 2.1%) reported by Zhang et al [14], indicate the caution to be exercised during porcelain veneer therapy. Apart from different fabrication techniques, porcelain veneers can be done on either prepared or unprepared teeth.…”

Comparison of Two Types of Preparation for Laminate Veneer with Three Types of All-Ceramic Materials

“…The ceramic veneers are requested by many patients as they are used for esthetic purposes with minimal tooth preparation that could be only in enamel, slight preparation is done to give thickness to the veneer to assure its strength and color. 1 The ceramic veneers have advantages over direct veneers of much less possibility of discoloration or development of recurrent caries under them. 2 Indirect veneers have limitations and concerns because of the material used in fabrication and the bonding system.…”

“…The mechanical states and behavior of fixed prostheses can be assessed using finite element analysis. 3 Three common types for laminate veneer preparations are as follows: (1) window or contact lens, (2) classic or conventional, and (3) wrap around or 3/4th type. In the window type, there is no preparation of the incisal edge, it is indicated when teeth have enough length.…”