Table 1.

Data collection for patients with peri-implantitis

Domain	Subdomain	Definition	T0	T1	T2	T3
Basic data	Sex	Male or female	x
	Age	Years	x
	Education level	Primary school; junior middle school; senior middle school; bachelor’s degree; master’s degree or above	x
	Smoking history	Never; ever; still have	x
	Drinking history	Never; ever; still have	x
	Physical activity	Never; sometimes; usually	x
	Details of oral health	Information including overall self-impression, symptoms, daily care, reasons for dental extraction, dental treatment experiences	x
Systematic diseases	HBP	Yes or no	x
	Diabetes	Yes or no	x
	CVD	Yes or no	x
	Stroke	Yes or no	x
	Cancer	Yes or no	x
	Hyperlipidaemia	Yes or no	x
	Rheumatism	Yes or no	x
	Liver disease	Yes or no	x
	CKD	Yes or no	x
	Gallstones	Yes or no	x
	Other systemic diseases	Yes or no	x
Implant-related factors	Implant site	FDI World Dental Federation notation	x
	Brand of implant	Brand name	x
	Location in the arch	Implant malposition	x
	Profile of implant	Length and diameter	x
	Implant surface	Rough; moderately rough; smooth	x
	Surface modification	Acid etching; grit blasting; laser treatment; UV light, chemical vapour deposition and physical vapour deposition; coating	x
	The distance of the restorative margin to the bone crest	<1.5 mm or ≥1.5 mm	x
	Bone augmentation at implant installation	Yes or no	x
	Implant function (years)	Years of implant function	x
Prosthesis-related factors	Type of connection	Screw or cemented	x
	Implant-abutment emergence angle and profile24	Emergence angle is defined as the angle of an implant restoration’s transitional contour as determined by the relation of the surface of the abutment to the long axis of the implant body. Emergence profile is defined as the contour of a tooth or restoration, such as a crown on a natural tooth or dental implant abutment, as it relates to the adjacent tissues.	x
	Residual excess cement	Yes or no	x
	Poor marginal fit of the suprastructure	Yes or no	x
	Interproximal contact loss	Yes or no	x
	Occlusal overload	Porcelain wear and chipping	x
	Type of prosthesis	Single-unit; multi-unit fix; overdenture	x
Periodontal probing measurement	PPD	PPD was calculated as the distance from the gingival margin to the bottom of the periodontal pocket or gingival sulcus	x	x	x	x
	AL	AL was measured with the graduated probe and represented the distance between the cementoenamel junction and the base of the probable pocket26	x	x	x	x
	BoP	BoP evaluates bleeding after insertion of a probe to the base of the sulcus or pocket, recorded as positive or negative	x	x	x	x
	SoP	SoP evaluates suppuration after insertion of a probe to the base of the sulcus or pocket, recorded as positive or negative	x	x	x	x
	Gingival biotype	Thin biotype or thick biotype	x
	Periodontitis severity	≥50% of the teeth with ≥50% of bone loss; ˂50% of the teeth with ≥50% of bone loss; no teeth with ≥50% of bone loss; total edentulism/stage (I, II, III, IV) and grade (A, B, C)	x
Oral hygiene	S-OHI	DI-S=0–3, CI-S=0–3	x	x	x	x
	FMPS	Full Mouth Plaque Score
Peri-implant probing measurement	PPD	PPD was calculated as the distance from the gingival peri-implant margin to the bottom of the peri-implant pocket	x	x	x	x
	BoP	BoP was assessed dichotomously in six sites per implant, recorded as positive or negative	x	x	x	x
	SoP	An objective indicator of gingival inflammation according to the presence or absence of suppuration after probing, recorded as positive or negative	x	x	x	x
	Keratinised mucosa width	Distance measured between the free mucosal margin to the mucogingival junction	x	x	x	x
	Peri-implantitis severity	Class (I, II, III) and grade (S, M, A)31	x
Radiological examination	Alveolar bone level based on CBCT	MBL changes around dental implant Bone volumetric changes around dental implants	x		x	x

AL, attachment loss; BoP, bleeding on probing; CBCT, cone-beam CT; CI-S, calculus index; CKD, chronic kidney disease; CVD, cardiovascular disease; DI-S, debris index; HBP, high blood pressure; MBL, marginal bone loss; PPD, probing pocket depth; S-OHI, Simplified Oral Hygiene Index; SoP, suppuration on probing; T0, baseline; T1, 6 months; T2, 12 months; T3, 18 months; UV, ultraviolet.