Correlation of Implant Location to Marginal Bone Level Changes in Single-Unit Restorations: A Retrospective Study

IF 4 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Clinical Implant Dentistry and Related Research Pub Date : 2025-09-30 DOI:10.1111/cid.70092

Berceste Guler Ayyildiz, Halil Ayyildiz, Tolga Fikret Tözüm

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Abstract

Introduction

The objective of the present study was to determine the emergence angle (EA) values and emergence profiles (EP) for single-unit fixed prosthetic restorations at the bone level, placed in different locations, and to evaluate their effect on radiographic marginal bone loss.

Methods

The study included 226 patients (mean age 63.61 ± 14.9 years), and 500 single-unit dental implants were analyzed in three implant localizations: molar, premolar, and anterior. Patient-related factors, implant length and diameter, implant brand, abutment retention type, implant placement time, prosthetic delivery loading type, prosthetic suprastructure type, and duration of prosthetic delivery time—from implant placement to long-term prosthetic functional loading—were recorded. Radiographically, EA, EP, marginal bone level changes (ΔMBL) at mesial and distal aspects were calculated. Receiver operating characteristic (ROC) curve analysis was employed to determine the cut-off point for all implant locations. Binary logistic regression analysis was utilized to identify confounding factors affecting MBL.

Results

The cut-off value of mesial EA was determined for molar, premolar, and anterior regions as 36.422°, 29.703°, and 25.12°, respectively. An increase in the duration of prosthetic delivery time, by every 1 month, the probability of MBL risk was 1.072 times higher. (OR: 1.072; CI: 1.009–1.139; p = 0.025) For the premolar localization variable, the OR value was determined as 2.381, and this indicated that the probability of bone loss in premolar implants is 2.381 times higher than in molar implants. Finally, the OR value of the anterior localization variable was obtained as 3.655, and this value indicated that the probability of bone loss in anterior implants is 3.655 times higher than in molar implants.

Conclusions

The findings of this study indicate that ΔMBL can be evaluated over a range of EA values. It can be stated that as the duration of prosthetic delivery time increases following the surgical placement of dental implants, the risk of marginal bone loss also increases.

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单单元修复体种植体位置与边缘骨水平变化的相关性：一项回顾性研究。

本研究的目的是确定在骨水平放置不同位置的单单元固定假体修复体的涌现角（EA）值和涌现剖面（EP），并评估其对放射学边缘骨丢失的影响。方法：226例患者（平均年龄63.61±14.9岁），对500个单单元种植体在臼齿、前臼齿和前臼齿三个种植体定位中进行分析。记录患者相关因素：种植体长度和直径、种植体品牌、基台保持类型、种植体放置时间、假体运送载荷类型、假体上部结构类型、假体运送时间——从种植体放置到长期假体功能负荷。x线摄影，计算EA， EP，中、远端边缘骨水平变化（ΔMBL）。采用受试者工作特征（ROC）曲线分析确定所有种植体位置的分界点。采用二元logistic回归分析确定影响MBL的混杂因素。结果：磨牙区、前磨牙区、前磨牙区近缘EA切点值分别为36.422°、29.703°、25.12°。植入假体的时间每增加1个月，发生MBL风险的概率增加1.072倍。（OR: 1.072; CI: 1.009-1.139; p = 0.025）对于前磨牙定位变量，OR值为2.381，表明前磨牙种植体发生骨丢失的概率是磨牙种植体的2.381倍。最后得到前牙定位变量的OR值为3.655，该值表明前牙种植体发生骨丢失的概率是磨牙种植体的3.655倍。结论：本研究结果表明ΔMBL可以在EA值范围内进行评估。可以这样说，随着牙种植体手术植入后假体交付时间的增加，边缘骨质流失的风险也增加。

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来源期刊

Clinical Implant Dentistry and Related Research 医学-牙科与口腔外科

CiteScore

6.00

自引率

13.90%

发文量

103

审稿时长

4-8 weeks

期刊介绍： The goal of Clinical Implant Dentistry and Related Research is to advance the scientific and technical aspects relating to dental implants and related scientific subjects. Dissemination of new and evolving information related to dental implants and the related science is the primary goal of our journal. The range of topics covered by the journals will include but be not limited to: New scientific developments relating to bone Implant surfaces and their relationship to the surrounding tissues Computer aided implant designs Computer aided prosthetic designs Immediate implant loading Immediate implant placement Materials relating to bone induction and conduction New surgical methods relating to implant placement New materials and methods relating to implant restorations Methods for determining implant stability A primary focus of the journal is publication of evidenced based articles evaluating to new dental implants, techniques and multicenter studies evaluating these treatments. In addition basic science research relating to wound healing and osseointegration will be an important focus for the journal.