Evaluation of biologically oriented preparation technique and conventional dental preparation in total crown restoration

doi:10.19439/j.sjos.2025.04.010

Abstract

Abstract: PURPOSE: To evaluate the value of biologically oriented preparation technique and conventional dental preparation in total crown restoration. METHODS: A total of 93 patients who underwent total crown restoration from January 2020 to November 2022 were selected, and were divided into experimental group and control group according to different dental preparation techniques. The control group was treated with conventional dental preparation (46 cases, 74 teeth), while the experimental group was treated with BOPT (47 cases, 75 teeth). Periodontal health indicators [plaque index (PI), gingival index (gingival index), probing depth (PD) and gingival thickness (GT)] were evaluated at 3 months, 6 months, 1 year and 2 years after treatment. The incidence of complications and patients' satisfaction were compared. RESULTS: In the control group, PI increased with time, reaching the highest value (2.20±0.57) at 1 year and decreasing to (1.70±0.66) at 2 years. PI of the experimental group reached the highest value (2.61±0.52) at the 3rd month, decreased at the 6th month, decreased to close to before treatment at the 1st year, and was significantly lower than before treatment at the 2nd year(P<0.001). The GI of the two groups decreased with the extension of time, and the GI of the experimental group at 6 months, 1 year and 2 years after treatment was significantly lower than that of the control group (P<0.001). The PD of the two groups decreased with the extension of time, and the PD of the control group increased at 6 months after treatment, and the PD of the experimental group was significantly lower than that of the control group at 6 months, 1 year and 2 years after treatment (P<0.001). Buccal GT of the two groups decreased with the extension of time, and the GT of the experimental group at 6 months, 1 year and 2 years after treatment was significantly lower than that of the control group (P<0.05). The incidence of biological complications in the experimental group (2.67%) was significantly lower than that in the control group (10.81%)(P<0.05). There was no significant difference in the incidence of mechanical complications between the two groups (P>0.05). The total complication rate of the experimental group (4.00%) was significantly lower than that of the control group (14.86%)(P<0.05). The scores and total scores of satisfaction of the experimental group were significantly higher than those of the control group (P<0.05). CONCLUSIONS: BOPT for total crown repair can reduce PI, GI and PD, increase GT, reduce complications and improve patients' satisfaction.

Key words: Biologically oriented preparation technique, Tooth preparation, Periodontal health, Total crown restoration

CLC Number:

R783.3

Guo Ling, Xu Longfen. Evaluation of biologically oriented preparation technique and conventional dental preparation in total crown restoration[J]. Shanghai Journal of Stomatology, 2025, 34(4): 398-402.

References

[1] Serra-Pastor B, Bustamante-Hernández N, Fons-Font A, et al.Periodontal outcomes of anterior fixed partial dentures on teeth treated with the biologically oriented preparation technique: a 6-year prospective clinical trial[J]. J Prosthet Dent, 2023, 129(5): 703-709.
[2] Agustín-Panadero R, Serra-Pastor B, Loi I, et al.Clinical behavior of posterior fixed partial dentures with a biologically oriented preparation technique: a 5-year randomized controlled clinical trial[J]. J Prosthet Dent, 2021, 125(6): 870-876.
[3] Labno P, Drobnik K.Comparison of horizontal and vertical methods of tooth preparation for a prosthetic crown[J]. J Pre-Clin Clin Res, 2020, 14(1): 25-28.
[4] 徐启蒙, 蒋升. 生物导向型牙体预备技术对修复体边缘牙周菌斑定植水平和龈沟液炎症因子水平的影响[J]. 实用口腔医学杂志, 2024, 40(1): 91-96.
[5] Abad-Coronel C, Manosalvas JV, Sarmiento CP, et al.Clinical outcomes of the biologically oriented preparation technique (BOPT) in fixed dental prostheses: a systematic review[J]. J Prosthet Dent, 2024, 132(3): 502-508.
[6] Serra-Pastor B, Bustamante-Hernández N, Fons-Font A, et al.Periodontal behavior and patient satisfaction of anterior teeth restored with single zirconia crowns using a biologically oriented preparation technique: a 6-year prospective clinical study[J]. J Clin Med, 2021, 10(16): 3482.
[7] 王博韬, 向玲玲, 张卓辰, 等. 生物功能性义齿修复系统在口腔修复中的应用现状[J]. 临床医学研究与实践, 2023, 8(21): 191-194.
[8] Han JY, Park SH, Kim J, et al.Clinical factors affecting the longevity of fixed retainers and the influence of fixed retainers on periodontal health in periodontitis patients: a retrospective study[J]. J Periodontal Implant Sci, 2021, 51(3): 163-178.
[9] Ercoli C, Tarnow D, Poggio CE, et al.The relationships between tooth‐supported fixed dental prostheses and restorations and the periodontium[J]. J Prosthodont, 2021, 30(4): 305-317.
[10] Galli F, Deflorian M, Zucchelli G, et al.The biologically oriented preparation technique (BOPT) approach for preventing gingival recessions in fixed prosthodontics: a 5-to 13-year follow-up retrospective study[J]. Int J Esthet Dent, 2024, 19(2): 112-124.
[11] Agustín-Panadero R, Martín-de Llano JJ, Fons-Font A, et al. Histological study of human periodontal tissue following biologically oriented preparation technique (BOPT)[J]. J Clin Exp Dent, 2020, 12(6): e597-e602.
[12] Amesti-Garaizabal A, Agustín-Panadero R, Solá-Ruíz MF, et al.Influence of angulation in cervical prosthetic emergences relative to the gingival tissue of teeth treated under the biologically oriented preparation technique (BOPT)[J]. Appl Sci, 2020, 10(12): 4108.
[13] Mohammad A, Abraham S, Nada A.The effect of biologically oriented and subgingival horizontal preparation techniques on periodontal health: a double-blind randomized controlled clinical trial[J]. Saudi Dent J, 2023, 35(6): 727-733.
[14] Serra-Pastor B, Loi I, Fons-Font A, et al.Periodontal and prosthetic outcomes on teeth prepared with biologically oriented preparation technique: a 4-year follow-up prospective clinical study[J]. J Prosthodont Res, 2019, 63(4): 415-420.
[15] Abad-Coronel C, Manosalvas JV, Sarmiento CP, et al.Clinical outcomes of the biologically oriented preparation technique (BOPT) in fixed dental prostheses: a systematic review[J]. J Prosthet Dent, 2024, 132(3): 502-508.