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| Questions | Modalities | Number of responses (%) | Total number of responses (%) |
|
| (i) Demographic aspects |
| (1) Age | 23–30 | 97 (28%) | 343 (100%) |
| 31–39 | 126 (37%) |
| 40–49 | 79 (23%) |
| Above 50 | 41 (12%) |
| (2) Gender | Male | 233 (68%) | 343 (100%) |
| Female | 110 (32%) |
| (3) Where have you been practicing in Saudi Arabia? | Eastern province | 127 (37%) | 338 (99%) |
| Western province | 77 (22%) |
| Middle province | 27 (8%) |
| Northern province | 33 (10%) |
| Southern province | 74 (22%) |
| (4) How long have you been practicing dentistry? | Less than 5 years | 82 (24%) | 342 (100%) |
| 5–10 years | 81 (24%) |
| 10–15 years | 66 (19%) |
| More than 15 | 113 (33%) |
| (ii) Practice frequency |
| (5) How many new class II resin composite restorations on average do you perform per week? | Less than 10 restorations | 140 (41%) | 342 (100%) |
| More than 10 restorations | 134 (39%) |
| More than 20 restorations | 68 (20%) |
| (iii) Personal procedural preferences |
(6) What is the kind of isolation that you use during class II resin composite restoration?
(More than one answer could be selected) | Cotton rolls | 230 (67%) | 343 (100%) |
| Rubber dam isolation | 112 (32%) |
| No isolation | 1 (1%) |
| (7) What is the type of resin composite material that you usually use for making class II restorations? | Micro-hybrid | 143 (42%) | 340 (99%) |
| Nano-hybrid | 136 (39%) |
| Other (please specify) | 14 (4%) |
| I do not know | 47 (14%) |
| (8) What is the insertion technique that you follow in restoring class II cavities? | Conventional incremental technique | 187 (55%) | 342 (100%) |
| Bulk-fill technique | 29 (8%) |
| Flowable bulk-fill followed by conventional composite | 126 (37%) |
| (9) What is the light curing unit that you usually use? | Light emission diode (LED) | 294 (86%) | 247 (99%) |
| Quartz Tungsten Halogen (QTH) | 14 (4%) |
| I do not know | 34 (10%) |
| (10) What is the light curing direction that you use for curing resin composite in class II cavities? | Occlusal direction | 93 (27%) | 341 (99%) |
| Three-directional curing (occlusal, buccal, lingual) | 248 (72%) |
| (11) Do you usually preheat resin composite before insertion? | Yes | 43 (12%) | 341 (99%) |
| No | 298 (87%) |
| (12) Do you usually start by a layer of flowable composite on the gingival seat before progressing to the successive resin composite increment? | Yes | 237 (69%) | 340 (99%) |
| No | 103 (30%) |
| (13) What is the type of adhesive system that you use for restoring class II cavities with resin composite? | Etch-and-rinse | 174 (51%) | 341 (99%) |
| Selective etching technique | 53 (15%) |
| Self-etch technique | 50 (14%) |
| Any available system | 64 (19%) |
| (14) What is the type of matrix system that you use for restoring class II cavities with resin composite? | Circumferential matrix–retainer device | 114 (33%) | 338 (98%) |
| Sectional matrix | 100 (29%) |
| Triodent V3 matrix | 23 (7%) |
| FenderMate matrix | 5 (2%) |
| AutoMatrix | 96 (28%) |
| (15) In restoring class II cavities with resin composite, do you first build a proximal wall of composite against the matrix before proceeding to the subsequent increment of composite? | Yes | 265 (77%) | 338 (98%) |
| No | 73 (21%) |
| (iv) Post-restorative quality hypersensitivity and tightness of proximal contact |
| (16) How satisfied are you with the techniques that you use for producing tight plus proximal contacts upon testing proximal contacts using dental floss? | Not at all | 23 (7%) | 337 (98%) |
| Kind of | 80 (23%) |
| Satisfied | 176 (51%) |
| Very satisfied | 58 (17%) |
| (17) Do you usually check the quality of your class II resin composite restorations using bitewing radiographs postoperatively? | Yes | 97 (28%) | 343 (100%) |
| No | 125 (36%) |
| Sometimes | 119 (35%) |
| (18) How many faulty class II resin composite restorations do you repair and/or remake per month? | Less than five | 183 (54%) | 342 (100%) |
| More than five | 69 (20%) |
| More than 10 | 90 (26%) |
| (19) What is the main form of failure of class II resin composite you encounter in your clinical practice necessitating repair/remake? | Fracture | 111 (32%) | 341 (99%) |
| Recurrent caries | 89 (26%) |
| Open contact | 59 (17%) |
| Pain | 64 (19%) |
| Discoloration | 20 (6%) |
| (20) What is the frequency of post-restorative hypersensitivity reported by the patient in the first week after your class II resin composite restoration? | Rare (less than 2%) | 158 (46%) | 342 (100%) |
| Infrequent (less than 10%) | 109 (32%) |
| Sometimes (20% or more) | 66 (19%) |
| Frequent (more than 50%) | 9 (3%) |
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